CN1817379B

CN1817379B - Catheter and introducer needle assembly with needle shield

Info

Publication number: CN1817379B
Application number: CN2006100093073A
Authority: CN
Inventors: C·N·辛德里奇; T·J·厄斯金; W·F·哈丁; G·H·豪厄尔
Original assignee: Becton Dickinson and Co
Current assignee: Becton Dickinson and Co
Priority date: 2000-11-21
Filing date: 2001-11-14
Publication date: 2010-06-23
Anticipated expiration: 2021-11-14
Also published as: AU4150902A; BRPI0107774B8; WO2002045786A3; BR0107774B1; CN1817379A; CN1427731A; BR0107774A; WO2002045786A2; CN1296105C; AU2002241509B2

Abstract

A catheter and introducer needle assembly with a needle shield is provided. The needle shield includes a means for preventing unwanted distal movement of the needle once the needle has been withdrawn into the needle shield. The needle shield also includes a means for connecting the needle shield to the catheter hub until the sharp distal tip of the introducer needle has been withdrawn into the needle shield. Thus, when the distal end of the introducer needle extends from the distal portion of the needle shield, the needle shield is connected to the catheter hub and when the sharp distal end of the introducer needle is withdrawn into the needle shield, the needle shield is disconnected from the catheter hub.

Description

Have the conduit of pin cover and the assembly of introducer needle

The application is that application number is 01807054.X, is entitled as the dividing an application of application for a patent for invention of " having the conduit of pin cover and the assembly of introducer needle ".

The application is that the application number that proposed on June 9th, 2000 is 09/590,600 part continuation application, and 09/590, No. 600 applications are that the application number of proposition on May 14th, 1999 is 09/312,335 part continuation application, and 09/312, No. 335 applications are that the application number that proposed on April 9th, 1998 is 09/057,718, now be U.S.6,004,294 part continuation application.The application still be the application number that proposed on February 4th, 2000 be 09/499,331 part continuation application, and 09/499,331 applications are that the application number of proposition on May 14th, 1999 is 09/312,335 part continuation application, and 09/312,335 applications are that the application number that proposed on April 9th, 1998 is 09/057,718, now be U.S.6,004,294 part continuation application.The application still be the application number that proposed in 24th of JIUYUE in 1999 be 09/406,026 part continuation application.

Technical field

The present invention designs a kind of conduit of a pin cover and assembly of introducer needle of comprising, after the use pin inserted conduit in the patient body, this pin cover protected the sharp distal of introducer needle safely.In addition, the present invention includes a kind of mechanism, it is linked the pin cover on the conduit, is lived by the pin cover cap up to the sharp distal of introducer needle.

Background technology

Conduit, particularly endovascular (IV) conduit is used for the liquid such as normal saline, various medicament and total intravenous nutrition is input in the patient body, draws blood on one's body or monitors the various parameters of patient's blood vessel system from a patient.The catheter in blood vessel of periphery trends towards shorter, and general length is about 2 inch or less than the magnitude of 2 inch.The periphery IV conduit that the most medium-sized IV conduit is full pin.Contain as its name, a full wire guide is installed on the pin with a sharp distal tip by an introducer.At least the end portion of conduit is bonded on the outer surface of pin tightly, preventing the disengagement of conduit, thereby helps conduit is inserted in the blood vessel.Conduit and cannula needle fit together, and like this, the end of introducer needle extends beyond the end of conduit, and the inclined-plane of syringe needle is made progress from patient's skin surface.

Conduit and introducer needle assembly insert a blood vessel with the skin of low-angle by patient.Have in the assembly insertion patient body of many kinds of technology with such conduit and introducer needle.In a kind of insertion technology, the assembly of inserter pin and conduit insert blood vessel together fully.In another kind of technology, after initial insertion blood vessel, introducer needle is retracted in the conduit.Then catheter cartridge is also inserted in the blood vessel on pin fully.

In order to examine conduit in endovascular suitable position, it denys the reflective of blood that the clinician will confirm to have in reflector cavity.Usually reflector cavity forms as the part of the cover joint of pin.Arrive suitable position in case confirm the conduit intravasation, the clinician above the blood vessel of the end of introducer needle and conduit by blood vessel being exerted pressure to lower compression patient's skin.This finger pressure is inaccessible or reduce further blood flow at least as far as possible by introducer needle and conduit.The clinician takes out introducer needle then, stays conduit in position, and connects a proper device on conduit.This device can comprise a liquid conveyer, a PRN, and an inaccessible end cap or a blood pressure monitor the probe.In case introducer needle is extracted out from conduit, cannula needle is one " tip that blood stains dyed ", appropriate processing in addition.

In recent years, the clinician is subjected to the pollution problem of patient's blood to cause great concern, and thinks that " tip that blood stains dyed " must be handled to avoid unexpected pinprick.Since appearance at present that can not cure with cause fatal diseases, acquired immune deficiency syndrome (AIDS) (" acquired immune deficiency syndrome (AIDS) ") for example, this disease can infect to other people from the infected by exchange body fluid, therefore causes people's attention.Therefore must avoid contacting the body fluid of AIDSinfected patient.As mentioned above, if an introducer needle is used for conduit is put into the blood vessel of an AIDSinfected patient, by its sharp distal tip, this introducer needle becomes the vehicle that infects this kind disease.Need correct handle " tip that blood stains dyed " although the clinician knows, unfortunately, in some medical environment, for example under the emergency case situation or, still take place with the pinprick of the introducer needle of pollution as the result who does not note or neglect.

Because quilt " tip that blood stains dyed " is the result of needle stick problems unexpectedly, has developed various pin cover.In general, this pin cover takes effect to the purpose that it will reach, but still can be improved.Specifically, huge being difficult to of some pin enclosure volume uses, and requires operation special device or technology, can stay the sharp distal of exposure after perhaps using, up to the manually actuated pin cover of clinician mechanism.

In addition, cover at the pin cover before the sharp distal tip of introducer needle, some pin cover can easily unload from the sheathed catheter joint.Avoiding this a kind of mechanism of unloading too early is a plurality of finger-type things from pin cover longitudinal extension, has extended radially inwardly all contact pin from the finger-type thing, and the finger-type thing engages with flange in the proximal end of sheathed catheter joint.Finger-type thing and contact pin remain on the pin cover on the conduit.Finger-type thing and contact pin should be designed to: engage required power between overcoming finger-type thing and contact pin and sheathed catheter saving greater than introducer needle closely laterally being moved into pin cover required power usually.Yet in case introducer needle all is retracted in the pin cover, the clinician can act on a bigger near edgewise power, to remove the pin cover from the sheathed catheter joint.Therefore, the pin cover still with catheter abutment, take off from conduit fully and protected safely in the pin cover up to introducer needle.Unfortunately, this structure can not guarantee consistently that the pin cover is connected on the sheathed catheter joint, in introducer needle is locked in the pin cover always.Because the pin that pollutes may expose outside, has increased the chance of accidental needle sticks, so this is not desirable.

Summary of the invention

Therefore, an object of the present invention is to provide the pin cover of a compactness.

Another object of the present invention provides a simple and easy to use pin cover.

Another purpose of the present invention provides one and does not require the pin cover of operating special device or technology.

A further object of the invention provides a pin cover, one recalls from the conduit when introducer needle, and the pin cover is just automatically protected the sharp distal of introducer needle.

Further aim of the present invention provides one and has the conduit of pin cover and the assembly of introducer needle, and wherein, the pin cover keeps and being connected of conduit always, covers the sharp distal of introducer needle up to the pin cover.

Of the present inventionly have the conduit of pin cover and the assembly of introducer needle comprises a conduit, an introducer needle and a pin cover.

Conduit has the near-end that a far-end and is connected the far-end of sheathed catheter joint.Conduit is coaxial to be arranged on the introducer needle, and the distal portions of conduit tightly is bonded on the outer surface of introducer needle, to prevent the disengagement of conduit, therefore, helps conduit is inserted in the patient's blood vessel.Before use, conduit be positioned at introducer needle around, like this, the sharp distal of introducer needle is in the distally of distal end of catheter.

Introducer needle has a sharp distal and and is connected in near-end on the far-end of needle guard joint.One reflector cavity is formed on the needle guard joint.A common exhaust piston is positioned at the open proximal end of reflector cavity, when blood when introducer needle enters reflector cavity, allow air to overflow from reflector cavity.Along the one far-end, introducer needle also can form a discontinuous part, and it can take multiple different form.For example, can use a slit, or be formed on the part of the diameter amplification of introducer.If the part of using a diameter to amplify, it can have a proximal part that reduces or a distal portions that reduces or both and have both.This phasing down almost can be oriented any angle with the longitudinal axis of introducer needle.In certain embodiments, distal portions is directed in that roughly the longitudinal axis with introducer needle is vertical.Yet main requirement is, discontinuous part has any structure that can coact with a locking piece, and this locking piece links to each other with the pin cover to prevent the improper distal movement of introducer needle with respect to the pin cover.In other words, in case sharp distal uses recession back into behind the pin cover, this sharp distal can not exposed out once more from the end of pin cover.This discontinuous part also can coact with a device, in case the sharp distal of introducer needle is closely laterally recalled the inserting needle cover, this device is used for preventing the unwanted proximal movement of introducer needle with respect to the pin cover.This sharp distal that prevents introducer needle exposes out from the near-end of pin cover once more.

The pin cover comprises a shell, and this shell has the internal chamber that an introducer needle can extend by it.In case introducer needle is closely laterally recalled in the inserting needle cover, a locking piece that links to each other with the pin cover stops the unwanted distal motion of introducer needle.In case the sharp distal of introducer needle is closely laterally recalled the inserting needle cover, also have a device that links to each other with the pin cover to be used for stoping the unwanted proximal movement of introducer needle.

In case the sharp distal of introducer needle is closely laterally recalled the inserting needle cover, can use various locking pieces to stop the sharp distal of introducer needle to run out of the unwanted distal motion of pin cover.For example, can use a transverse stop, along with the inserter pin is recalled the inserting needle cover, block piece is striden and is stood on the needle shaft, in case and the pin end be positioned at the nearside of transverse stop, block piece moved before sharp distal.In such embodiments, do not need discontinuous part on the inserter pin.Perhaps, can use one together with the locking piece that is formed on the discontinuous part on the inserter pin.In such embodiments, locking piece allows the discontinuous part of inserter pin to move through locking piece along proximal direction, but stops discontinuous part to move through locking piece along distal direction.Such locking piece can be taked various ways, and can comprise a spring brake, one has the sheet spring of one or more lock legs, wherein, lock legs has various structures, one has one or morely inwardly with towards the pipe of the contact pin of nearside, and one has one or morely radially inwardly and from the speed change nut towards the contact pin of nearside of Subject Extension, or one have one or more retention plates that are formed on the radially inner contact pin around the main body.

Spring brake has the roughly U-shaped structure with a pair of fork that separates.The inserter pin is arranged between two forks and can vertically moves by two forks.One biasing mechanism forces spring brake upwards to contact with the inserter pin.For this embodiment, the discontinuous part on pin is a diameter amplifier section preferably.Tighten group part of moving back that is connected on diameter amplifier section nearside at the inserter pin and can be used to be convenient to the proximal movement of diameter amplifier section by spring brake.The diameter amplifier section can form with one side shoulder distad, providing one further effectively to engage with spring brake, and farthest reduce normal use and normal condition under the clinician force the sharp distal of inserter pin to run out of the probability of pin cover.

When the inserter pin is closely laterally recalled when entering the pin cover, the inserter pin is striden upright two forks by spring brake.Along with the diameter amplifier section passes through this pair fork, the diameter amplifier section engages two forks.This forces spring brake to rotate towards the near-end of inserter pin.Spring brake also is forced to resist the bias voltage of biasing mechanism downwards.The motion of spring brake allows the diameter amplifier section of inserter pin closely laterally to move through spring brake.In case the diameter amplifier section is positioned at the nearside of spring brake, biasing mechanism forces spring brake to make progress and two forks of spring brake is rotated towards the far-ends of inserter pin.The motion of spring brake has guaranteed in the space of main part between two forks of spring brake of inserter pin, so two fork extends upward by the inserter pin.On this position, spring brake in abutting connection with a shoulder towards a surface of nearside or the wall on the shell, to stop the edgewise rotation further far away of spring brake.Therefore, if a clinician attempts distad to advance the inserter pin, then the diameter amplifier section is with two forks of combined spring lock.In addition, spring brake is with wall on the splice enclosure or shoulder, and prevention inserter pin distal movement.

Use a slice spring as another kind of locking piece, in case the sharp distal of inserter pin is closely laterally recalled into inserter pin cover, this block piece is used for stoping the unwanted distal motion of inserter pin.Use the sheet spring, can adopt the discontinuous part of any structure.Yet when using the sheet spring, preferably, this discontinuous part is one having towards the diameter amplifier section of the shoulder in distally on the inserter pin.

The sheet spring has a proximal wall, a supporting leg and at least one lock legs.Preferably, supporting leg and lock legs are configured to: lock legs is the proximal extension of supporting leg dorsad roughly.In this structure, supporting leg and lock legs have roughly a V-arrangement, and the top end face of V-arrangement distad.Although preferred this structure can be used any other structure that makes lock legs towards inserter pin biasing.For example, lock legs can be approximately perpendicular to supporting leg or be oriented in less than on certain angle of 90 °.Perhaps, lock legs can form roughly U-shaped or the v-shaped structure that has a pair of two forks that separate.Adopt such structure, lock legs is to stop the motion of inserter pin unwanted distal with the similar mode of above-mentioned spring brake.In addition, stride the part that stands in the lock legs on the inserter needle shaft, its shape can be approximate with the circumferential section of inserter pin, so that the drag force that the inserter pin on lock legs passes through reduces to minimum.

This structure of sheet spring has guaranteed that lock legs is offset to and in abutting connection with the main part of inserter pin.Yet when the inserter pin closely laterally moved into the pin cover, this biasing still allowed lock legs to stride to stand on the diameter amplifier section.In case the diameter amplifier section moves to the nearside of lock legs towards the shoulder in distally, then lock legs turns back to the main part of inserter pin and contacts.After this, if the inserter pin far laterally moves, lock legs with the composition surface distad shoulder and stop the further distal movement of inserter pin.

Sheet spring and shell can be configured at utmost increase the mechanical engagement power between lock legs and the inserter pin.For example, the chamber that locking piece was positioned at can have and moves back the cross section of dialling, and the sheet spring can be arranged on wherein, and like this, it can far laterally move into this and move back in the cross section of dialling.

In the present embodiment of sheet spring, the inserter pin can resemble the nearly inserting needle cover of laterally recalling the aforesaid embodiment, is positioned at the nearside of lock legs up to discontinuous part.After this, if the inserter pin far laterally moves, lock legs engages discontinuous part, and makes the locking piece distally move into moving back in group tee section of chamber.This makes the sheet spring engage the inserter pin with the power that increases progressively, up to the further distal movement of moving back the cross section prevention sheet spring of dialling shape.In this, lock legs effectively engages discontinuous part, to stop the distal movement of inserter pin.

In order to reduce to minimum in the drag force on the inserter pin, originally lock legs can separate with the inserter pin.In another embodiment, lock legs can keep the disengagement with the inserter pin by being arranged on a finger-type thing and the contact pin on sheet spring and the shell.The joint of the discontinuous part by the inserter pin and the proximal wall of sheet spring, the sheet spring closely laterally moves with respect to shell, throws off mutually so finger-type thing and contact pin are moved.This is by the inside biasing of lock legs, and lock legs is moved into and the engaging of inserter pin, and after this, has stoped the unwanted distal motion as mentioned above.

In another embodiment of sheet spring, chamber has a distal portions and a proximal part, and wherein, the diameter of distal portions is greater than the diameter of proximal part.The sheet spring is arranged in the chamber so that make nearside to motion from distal portions to proximal part.When the sheet spring was arranged on distal part, lock legs did not engage with the inserter pin.Along with the inserter pin is closely laterally recalled the inserting needle cover, the proximal wall of the discontinuous part joint fastener spring of inserter pin.This joint closely laterally moves the sheet spring, and the inserter pin moves into the proximal part of chamber simultaneously, up to the proximal wall of the proximal wall latch housing of sheet spring.In this, the further proximal movement that has stoped sheet spring and inserter pin.

When the sheet spring is positioned at proximal part, all walls that form chamber force lock legs inwardly to engage with the inserter pin.The sheet spring comprises flexible, outward extending finger-type thing.The inwall of the proximal part in chamber forms all grooves of the wall with proximad admitting all finger-type things.When the sheet spring is positioned at proximal part, so during the proximal wall of the proximal wall latch housing of sheet spring, the finger-type thing is positioned at groove, so they are positioned at towards the nearside of the wall of nearside, therefore, the joint of the wall by finger-type thing dough-making powder proximad has stoped the distal movement of sheet spring.As a result, when the discontinuous part of inserter pin engages lock legs, stoped the distal movement of inserter pin.

Perhaps, lock legs can be directed like this: it is approximately perpendicular to supporting leg and forms with a minor diameter opening that forms thereon.This opening is too little and do not allow diameter amplifier section on the inserter pin by opening, allows the main part of inserter pin to pass through therebetween but it is enough big.

By the axle of inserter pin, the sheet spring remains on an offset position.Therefore, when inserter pin withdrawal inserting needle cover, lock legs is striden and is stood on the inserter needle shaft.In case the far-end indentation pin cover of inserter pin also is positioned at the nearside of lock legs, the sheet spring turns back to its not offset position.After this manner, lock legs moves the interior minor diameter opening of lock legs is alignd with the sharp distal of inserter pin.Therefore, if the inserter pin far laterally moves with respect to the sheet spring, then the far-end of inserter pin moves through the opening of the minor diameter that forms on lock legs.Yet, when the diameter amplifier section on the inserter pin engages the minor diameter opening that is formed on the lock legs, stoped the inserter pin to walk out the distal movement of pin cover.

Preferably, shell comprises at least one additional midfeather near lock legs.This midfeather comprises an opening wherein, extends through midfeather with the main part that allows the inserter pin.This provides extra supporting to the inserter pin, and when guaranteeing that the sheet spring returns its not offset position, inserter pin and minor diameter register in lock legs.

One variant of above-mentioned spring is included in the opening on the lock legs, and the slightly larger in diameter of opening is in the diameter of the diameter amplifier section of inserter pin.The sheet spring also comprises a proximal wall, and this wall forms an opening therein, and opening is slightly larger than the diameter of the axle of inserter pin, but less than the diameter of diameter amplifier section.The sheet spring also is slidably disposed on the shell of pin cover, but has an end of lock legs, and this lock legs is with respect to shell fix in position haply.This allows lock legs to rotate in the enclosure.

When the sharp distal of inserter pin extended beyond the far-end of pin cover, before the use, lock legs was perpendicular to the longitudinal axis of inserter pin.In this position, the inserter pin extends through at opening on the proximal wall and the opening on lock legs.Because the slightly larger in diameter of the opening on the lock legs is in the diameter of diameter amplifier section, so it can be by the withdrawal of the opening on the lock legs, the diameter amplifier section is positioned at the nearside of lock legs like this.

In case the diameter amplifier section of inserter pin engages the opening on the proximal wall, the sheet spring closely laterally moves together with the inserter pin, up to the proximal wall of the proximal wall latch housing of sheet spring.Because an end of lock legs is with respect to shell fix in position basically, the proximal movement of sheet spring make proximal leg as shown in the figure clockwise direction rotate.This has changed the orientation of lock legs upper shed, and like this, a plane that forms this opening is no longer perpendicular to the longitudinal axis of inserter pin.Replace, this opening tilts, like this, the effective diameter of opening, i.e. the perpendicular diameter of opening is less than the diameter of diameter amplifier section.In addition, on this position, a brake component relevant with the sheet spring stoped sheet spring subsequent distal movement.Therefore, because the diameter amplifier section can not move through the opening on the lock legs, so stoped any distal movement thereafter of inserter pin.

Another kind of locking piece is formed in the pipe on the shell, in case sharp distal is closely laterally recalled the inserting needle cover, the sharp distal of its prevention inserter pin is walked out the distal movement of the far-end of pin cover.Moreover although most of form of discontinuous part can be used for present embodiment, discontinuous part preferably has the diameter amplifier section of one side shoulder distad.This pipe is positioned at the inside of shell, passes through therebetween to allow the inserter pin, and comprises at least one movably lance shape projection or nearly contact pin that laterally extends inward into this pipe.Preferably, this lance shape projection or contact pin are inwardly setovered.Because lance shape projection or contact pin are movably, so the diameter amplifier section of inserter pin can closely laterally move through lance shape projection or contact pin together with the shoulder towards the distally.In case the inserter pin is closely laterally recalled the inserting needle cover, lance shape projection or contact pin are positioned at towards the distally of the shoulder in distally like this, when shoulder distad engages lance shape projection or contact pin, will stop the unwanted distal motion of inserter pin face to face.

Although having the diameter amplifier section of one side shoulder distad is the preferred embodiment of discontinuous part, the groove that is formed on the inserter pin also can be used as discontinuous part.When the inserter pin was closely laterally recalled the inserting needle cover, one of lance shape projection or contact pin extended into groove.After this, when the proximal edge of lance shape projection or tab engages groove, stoped the distal movement of inserter pin.

Another kind of locking piece is formed in or is added on the speed change nut on the shell, in case sharp distal is closely laterally recalled the inserting needle cover, this locking piece stops the inserter pin to walk out the distal movement of the far-end of pin cover.The speed change nut be positioned at shell and form a through hole and adjacent through-holes at least one towards contact pin nearside, that extend radially inwardly.This through hole should be slightly larger than the diameter of inserter pin, passes through opening with the main part that allows the inserter pin.Because contact pin is closely laterally to be orientated, so discontinuous part can closely laterally move through contact pin.

In case the inserter pin is closely laterally recalled the inserting needle cover, like this, contact pin is positioned at the distally of discontinuous part, when discontinuous part engagement tab, will stop any distal movement of inserter pin.If what discontinuous part adopted is the diameter amplifier section, require to be included in the shoulder on the diameter amplifier section, to guarantee the firm engagement with contact pin towards the distally.Perhaps, discontinuous part can be formed in the groove on the pin.When the inserter pin was closely laterally recalled the inserting needle cover, contact pin fell into groove, thus, when the proximal of this groove of tab engages, had stoped any further distal movement of pin.For avoiding the difficulty of contact pin and groove alignment, the speed change nut can form and have a plurality of contact pin, and each contact pin is configured to engage with groove.Perhaps, the inserter pin can form with the groove of a plurality of vertical shifts around being positioned at inserter pin periphery.

Also having a kind of locking piece embodiment is the retention plate that is positioned on the proximal end face that is formed on the midfeather on the shell, in case sharp distal is closely laterally recalled the inserting needle cover, this locking piece has stoped the sharp distal of inserter pin to walk out the distal movement of the far-end of pin cover.This wall forms an opening therein, and it has an enough big diameter and allows inserter pin and discontinuous part to pass through.Retention plate forms at least one but preferably a plurality of radially inner contact pin.Be formed with one between the contact pin and cut part, the radius of this part is substantially equal to or is slightly larger than the radius of the main part of inserter pin, but less than the radius of diameter amplifier section.In the present embodiment, this discontinuous part preferably has a diameter amplifier section of one side shoulder distad.Along with the inserter pin is recalled the inserting needle cover, the main part of inserter pin is in interference slightly or do not have under the situation of interference and stride the upright retention plate that passes through.Along with the inserter pin closely laterally moves with respect to the pin cover, the diameter amplifier section of inserter pin engages this retention plate, and contact pin is closely laterally crooked, so the diameter amplifier section can closely laterally move through retention plate.In case the diameter amplifier section of pin is positioned at the nearside of retention plate, contact pin turns back to its unbent position and in abutting connection with the proximal end face of midfeather.When the diameter amplifier section engages the contact pin of retention plate, because shell wall has stoped contact pin to avoid the far away edgewise bending of diameter amplifier section, so stoped any subsequent distal movement of inserter pin.

In case the sharp distal of inserter pin is closely laterally recalled the inserting needle cover, thereby stop the device of the further proximal movement of inserter pin can take various ways.For example, be under the situation of diameter amplifier section in discontinuous part, shell can comprise the opening of a nearside, the main part that its diameter is enough to allow the inserter pin is from wherein extending through, but the too little and diameter amplifier section that do not allow the inserter pin is by therebetween.Perhaps, the discontinuous part of tube inserter pin is not taked where not use discontinuous part go which kind of structure or the inserter pin, can use the tethers of a connection needle guard joint and pin cover.

The pin cover preferably also comprises a spring clip, and its connection pin cover saves and keeps this with sheathed catheter and is connected, and recalls the inserting needle cover and locks on the throne up to the sharp distal of inserter pin.This spring clip can be taked various ways.

In one embodiment, the pin cover comprises that one has the spring clip of a gripper-arm, and gripper-arm engages with the sheathed catheter joint.Spring clip is offset to a position, does not engage with the sheathed catheter joint in this position gripper-arm.Spring clip remains on the position of a biasing, and wherein gripper-arm engages the sheathed catheter joint by the inserter needle shaft.Therefore, as long as inserter pin distal extension passes through spring clip, gripper-arm still keeps engaging with the sheathed catheter joint, and the sheathed catheter joint keeps being connected with the pin cover.In case the sharp distal of inserter pin is closely laterally recalled by spring clip, gripper-arm moves with the sheathed catheter joint and is disengaged.This allows the sheathed catheter joint to separate from the pin cover.This structure guarantees that the inserter pin still keeps and the engaging of conduit, and shifts out fully and fully protects in the pin cover up to the inserter pin from conduit.

Spring clip can be used in combination with above-mentioned any locking piece, to stop the unwanted distal motion of inserter pin with respect to the pin cover.In addition, spring clip can be any integrally formed in these locking pieces, or separate formation with them.

The special construction of spring clip can be taked multiple different form, and can be directed in the enclosure in a different manner.For example, spring clip can have roughly V or U-shaped structure.In the present embodiment, spring clip is positioned at the longitudinal axis of shell perpendicular to the inserter pin, and like this, V-arrangement or U-shaped structure are easy to show from the end cross-sectional view of pin cover.Therefore, V-arrangement lower limb remains on its offset position near another lower limb by directly contacting with the axle of inserter pin.In this structure, spring clip comprises the gripper-arm that a longitudinal axis that is basically parallel to the inserter pin extends, and engages with a brake component that is approximately perpendicular on the sheathed catheter joint of longitudinal axis orientation of gripper-arm.When the inserter pin is retracted into the nearside of spring clip, it turns back to its not offset position, and like this, gripper-arm laterally moves, and promptly is substantially perpendicular to the longitudinal axis of inserter pin, is disengaged with the sheathed catheter joint.

In another alternate embodiment, spring clip is that bending shaft straight and by the inserter pin enters its offset position basically.In the present embodiment, gripper-arm has a hook-shape structure, and a lower limb of hook extends perpendicular to the longitudinal axis of inserter pin, and hook is towards the distally.When the inserter pin moved to the nearside of spring clip, it turned back to its not offset position, and like this, gripper-arm laterally moves with the sheathed catheter joint and is disengaged.

But spring clip is roughly V-arrangement or U-shaped also, aligns but be orientated in the enclosure with the longitudinal axis of inserter pin, and like this, in the top cross-sectional view of inserter pin, this V-arrangement or U-shaped structure are visible.In this structure, gripper-arm is roughly parallel to the longitudinal axis extension of inserter pin and directly engages with the sheathed catheter joint.Yet requiring has an isolating bias arm, and the longitudinal axis that it is substantially perpendicular to the inserter pin extends and be connected to each lower limb of V-arrangement or U-shaped, so but inserter pin bias spring clip save with sheathed catheter and engage.Each bias arm forms an opening therein, and the inserter pin extends through opening to reach this biasing requirement.In case the inserter pin moves on to the nearside of bias arm, not offset position and sheathed catheter joint that the lower limb of spring clip can move on to them are disengaged.Perhaps, spring clip can only form with a lower limb, and spring clip has roughly a L shaped structure like this.

Use in the situation of the lock legs that is approximately perpendicular to the inserter pin at the sheet spring, spring clip can link together with lock legs.Spring clip is connected on the pin cover shell pivotly, like this, by the motion of lock legs, it is not pivoted between the clamped position at a clamped position and.Perhaps, spring clip can form one from the lock legs hook that laterally extends far away, and like this, lock legs protects the motion of protective position that hook is moved to non-clamping position from a clamped position from non-.

For the embodiment of above-mentioned use one bias arm, can use one the drag force on the inserter pin reduced to minimum device.This device is the finger-type thing that a pendant or the longitudinal axis that is roughly parallel to the inserter pin from the edge of the opening on bias arm extend.Perhaps, in the situation of using two bias arms, use one pin and tethers capable of being combined.The pin that extends by bias arm keeps opening to be in correct alignment, so the inserter pin can not stumble at the side of opening.The tethers of one connecting pin and needle guard joint is pulled out bias arm with pin and is allowed spring clip to turn back to its not offset position.

In the situation of using two bias arms, the finger-type thing of interlocking can be positioned at the end of bias arm, and like this, in case the inserter pin is retracted into the nearside of bias arm, interlocking fingers locks together to guarantee forming a transverse stop that did not lose efficacy by bias arm.

In another embodiment of spring clip, spring clip can with one roughly the X-shaped structure form.In the present embodiment, spring clip is orientated X-shaped in the enclosure and aligns with the longitudinal axis of inserter pin, and like this, in the cross sectional top view of inserter pin, the X-shaped of spring clip is visible.In the present embodiment, the inserter pin keeps the distal portions of all lower limbs of X-shaped to separate, so their engage the inside of sheathed catheter joint.Therefore, in case the inserter pin is retracted into the nearside of the intersection of lower limb, the distal portions of lower limb can move inward to be disengaged with the sheathed catheter joint.

For all the above embodiments, gripper-arm can be configured to inside or the external engagement with the sheathed catheter joint.In addition, gripper-arm can be configured to frictionally or mechanically engage with the sheathed catheter joint.If require the joint of a machinery, gripper-arm wherein can have a brake component, and it engages with a complementary brake component on being formed on sheathed catheter joint.Complementary brake component can comprise: for example, and a groove and a finger-type thing, or the post of any geometric form.Which kind of special construction that don't work, main requirement are that gripper-arm is engaged with the sheathed catheter joint, save so make the clinician be difficult to remove sheathed catheter from the pin cover, are protected in the pin cover up to the sharp distal of inserter pin.

Description of drawings

Accompanying drawing shows all preferred embodiments, and wherein, identical label is represented components identical, and wherein:

Fig. 1 is the axonometric chart that has the assembly of standard catheter of pin cover of the present invention and inserter pin, and wherein conduit is a broken section;

Fig. 2 is the axonometric chart that has the assembly of the conduit of one of pin cover of the present invention and inserter pin;

Fig. 3 A is the front elevation of the amplification of inserter needle distal part, and this inserter pin has adopted an embodiment of the discontinuous part on the assembly of the conduit that is used to have pin cover of the present invention and inserter pin;

Fig. 3 B is the front elevation of the amplification of inserter needle distal part, and this inserter pin has adopted second embodiment of the discontinuous part on the assembly of the conduit that is used to have pin cover of the present invention and inserter pin;

Fig. 3 C is the front elevation of the amplification of inserter needle distal part, and this inserter pin has adopted the 3rd embodiment of the discontinuous part on the assembly of the conduit that is used to have pin cover of the present invention and inserter pin;

Fig. 3 D is the front elevation of the amplification of inserter needle distal part, and this inserter pin has adopted the 4th embodiment of the discontinuous part on the assembly of the conduit that is used to have pin cover of the present invention and inserter pin;

Fig. 3 E is the front elevation of the amplification of inserter needle distal part, and this inserter pin has adopted the 5th embodiment of the discontinuous part on the assembly of the conduit that is used to have pin cover of the present invention and inserter pin;

Fig. 3 F is the front elevation of the amplification of inserter needle distal part, and this inserter pin has adopted the 6th embodiment of the discontinuous part on the assembly of the conduit that is used to have pin cover of the present invention and inserter pin;

Fig. 3 G is the front elevation of the amplification of inserter needle distal part, and this inserter pin has adopted the 7th embodiment of the discontinuous part on the assembly of the conduit that is used to have pin cover of the present invention and inserter pin;

Fig. 4 is the cross-sectional view of pin cover that has first embodiment of the locking piece that stops the motion of inserter pin unwanted distal, and the distal portions of inserter pin that wherein has the sharp distal of inserter pin stretches out the far-end of pin cover;

Fig. 5 is the cross-sectional view of pin cover that has first embodiment of the locking piece that stops the motion of inserter pin unwanted distal, and the distal portions of inserter pin that wherein has the sharp distal of inserter pin is recalled the inserting needle cover;

Fig. 6 is the cross-sectional view of pin cover that has first embodiment of the locking piece that stops the motion of inserter pin unwanted distal, and the distal portions of inserter pin that wherein has the sharp distal of inserter pin is locked in the pin cover;

Fig. 7 is the axonometric chart of spring brake of first embodiment that is used for the locking piece of the prevention inserter pin unwanted distal motion shown in Fig. 4 to 6;

Fig. 8 is the elevation cross-sectional view of pin cover that has second embodiment of the locking piece that stops the motion of inserter pin unwanted distal; The distal portions of inserter pin that wherein has the sharp distal of inserter pin stretches out the far-end of pin cover;

Fig. 9 is the cross-sectional view of pin cover that has second embodiment of the locking piece that stops the motion of inserter pin unwanted distal, and the distal portions of inserter pin that wherein has the sharp distal of inserter pin is locked in the pin cover;

Figure 10 is the axonometric chart of sheet spring of second embodiment of the locking piece of the prevention inserter pin unwanted distal motion shown in Fig. 8 and 9;

Figure 11 is the elevation cross-sectional view of pin cover that has the 3rd embodiment of the locking piece that stops the motion of inserter pin unwanted distal; The distal portions of inserter pin that wherein has the sharp distal of inserter pin stretches out the far-end of pin cover;

Figure 12 is the cross-sectional view of pin cover that has the 3rd embodiment of the locking piece that stops the motion of inserter pin unwanted distal, and the distal portions of inserter pin that wherein has the sharp distal of inserter pin is locked in the pin cover;

Figure 13 is the axonometric chart of sheet spring of the 3rd embodiment of the locking piece of the prevention inserter pin unwanted distal motion shown in Figure 11 and 12;

Figure 14 is the schematic cross section of pin cover that has the 4th embodiment of the locking piece that stops the motion of inserter pin unwanted distal; The distal portions of inserter pin that wherein has the sharp distal of inserter pin stretches out the far-end of pin cover;

Figure 15 is the schematic cross section of pin cover that has the 4th embodiment of the locking piece that stops the motion of inserter pin unwanted distal, and the distal portions of inserter pin that wherein has the sharp distal of inserter pin is locked in the pin cover;

Figure 16 is the schematic cross section of pin cover that has the 5th embodiment of the locking piece that stops the motion of inserter pin unwanted distal; The distal portions of inserter pin that wherein has the sharp distal of inserter pin stretches out the far-end of pin cover;

Figure 17 is the schematic cross section of pin cover that has the 6th embodiment of the locking piece that stops the motion of inserter pin unwanted distal; The distal portions of inserter pin that wherein has the sharp distal of inserter pin stretches out the far-end of pin cover;

Figure 18 is the schematic cross section of pin cover that has the 6th embodiment of the locking piece that stops the motion of inserter pin unwanted distal; The distal portions of inserter pin that wherein has the sharp distal of inserter pin is locked in the pin cover;

Figure 19 is the elevation cross-sectional view of pin cover that has the 7th embodiment of the locking piece that stops the motion of inserter pin unwanted distal; The distal portions of inserter pin that wherein has the sharp distal of inserter pin stretches out the far-end of pin cover;

Figure 20 is the elevation cross-sectional view of pin cover that has the 7th embodiment of the locking piece that stops the motion of inserter pin unwanted distal; The distal portions of inserter pin that wherein has the sharp distal of inserter pin is locked in the pin cover;

Figure 21 is the axonometric chart of sheet spring of the 7th embodiment of the locking piece of the prevention inserter pin unwanted distal motion shown in Figure 19 and 20;

Figure 22 is the cross-sectional view of signal of pin cover that has the 8th embodiment of the locking piece that stops the motion of inserter pin unwanted distal; The distal portions of inserter pin that wherein has the sharp distal of inserter pin stretches out the far-end of pin cover;

Figure 23 is the schematic cross section of pin cover that has the 8th embodiment of the locking piece that stops the motion of inserter pin unwanted distal; The distal portions of inserter pin that wherein has the sharp distal of inserter pin is locked in the pin cover;

Figure 24 is the view of far-end of the sheet spring of locking piece the 8th embodiment, and this locking piece stops the unwanted distal motion of inserter pin, and has orientation as shown in figure 22;

Figure 25 is the view of far-end of the sheet spring of locking piece the 8th embodiment, and this locking piece stops the unwanted distal motion of inserter pin, and has orientation as shown in figure 23;

Figure 26 is the cross-sectional view of pin cover that has the 9th embodiment of the locking piece that stops the motion of inserter pin unwanted distal, and the distal portions of inserter pin that wherein has the sharp distal of inserter pin stretches out the far-end of pin cover;

Figure 27 is the cross-sectional view of pin cover that has the 9th embodiment of the locking piece that stops the motion of inserter pin unwanted distal, and the distal portions of inserter pin that wherein has the sharp distal of inserter pin is locked in the pin cover;

Figure 28 is the elevation cross-sectional view of pipe of the 9th embodiment of the locking piece shown in Figure 26 and 27, and this locking piece stops the unwanted distal motion of inserter pin;

Figure 29 is the cross-sectional view of pin cover that has the tenth embodiment of the locking piece that stops the motion of inserter pin unwanted distal, and the distal portions of inserter pin that wherein has the sharp distal of inserter pin stretches out the far-end of pin cover;

Figure 30 is the cross-sectional view of pin cover that has the tenth embodiment of the locking piece that stops the motion of inserter pin unwanted distal, and the distal portions of inserter pin that wherein has the sharp distal of inserter pin is locked in the pin cover;

Figure 31 is the cross-sectional view of pin cover that has the tenth embodiment of the locking piece that stops the motion of inserter pin unwanted distal, and the distal portions of inserter pin that wherein has the sharp distal of inserter pin shown in Fig. 3 F is locked in the pin cover;

Figure 32 is the axonometric chart that stops the speed change nut of inserter pin unwanted distal the tenth embodiment motion, the locking piece shown in Figure 29 to 31;

Figure 33 is the discrete axonometric chart of a conduit, an inserter pin and pin cover, the pin cover has the 11 embodiment of the locking piece that stops the motion of inserter pin unwanted distal and first embodiment of spring clip, this spring clip connects pin cover and sheathed catheter joint, is locked in the pin cover up to the sharp distal of inserter pin;

Figure 34 is a partial cross-sectional view of pin cover, this pin cover has the 11 embodiment of the locking piece that stops the motion of inserter pin unwanted distal, first embodiment of spring clip, this spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is locked in the pin cover, the proximal part of the part of inserter pin and sheathed catheter joint, wherein the sharp distal of inserter pin is stretched out and the pin cover is connected in the sheathed catheter joint from the far-end of pin cover;

Figure 35 is a partial cross-sectional view of pin cover, this pin cover has the 11 embodiment of the locking piece that stops the motion of inserter pin unwanted distal, first embodiment of spring clip, this spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is locked in the pin cover, the proximal part of the distal portions of inserter pin and sheathed catheter joint, wherein the sharp distal of inserter pin is locked in the pin cover and pin cover and the disengagement of sheathed catheter joint;

Figure 36 A is the axonometric chart of first embodiment of the spring clip shown in Figure 33 to 35, and this spring clip is connected to sheathed catheter joint with the pin cover, is locked in the pin cover up to the sharp distal of inserter pin;

Figure 36 B is the axonometric chart of a variant of first embodiment of the spring clip shown in Figure 36 A, and this spring clip is connected to the sheathed catheter joint with the pin cover, is locked in the pin cover up to the sharp distal of inserter pin;

Figure 36 C is the axonometric chart of another variant of first embodiment of the spring clip shown in Figure 36 A, and this spring clip is connected to the sheathed catheter joint with the pin cover, is locked in the pin cover up to the sharp distal of inserter pin;

Figure 37 A is the axonometric chart of retention plate of the 11 embodiment of the locking piece shown in Figure 33 to 35, and this locking piece stops the motion of inserter pin unwanted distal;

Figure 37 B is the sketch map of part section of a variant of the retention plate shown in Figure 37 A, and retention plate is in abutting connection with the proximal end face of the inwall of pin cover shell;

Figure 37 C is the sketch map of part section of another variant of the retention plate shown in Figure 37 A, and retention plate is in abutting connection with the proximal end face of the inwall of pin cover shell;

Figure 38 is the cross-sectional view of pin cover 38-38 along the line shown in Figure 34, and how the gripper-arm of spring clip shown in the figure moves along the slope that is formed on the shell;

Figure 39 is the cross-sectional view of pin cover 39-39 along the line shown in Figure 35, and how the gripper-arm of spring clip shown in the figure moves along the slope that is formed on the shell;

Figure 40 is first embodiment of spring clip, the axonometric chart of the signal of the part of the part of inserter pin and sheathed catheter joint, this spring clip has the transverse stop of a connection pin cover and sheathed catheter joint, sharp distal up to the inserter pin is locked in the pin cover, wherein, the sharp distal of inserter pin extends out and the pin cover is connected on the sheathed catheter joint from the end of pin cover;

Figure 41 is the axonometric chart of the signal of spring clip shown in Figure 40, and wherein the sharp distal of inserter pin is locked in the pin cover and pin cover and the disengagement of sheathed catheter joint;

Figure 42 is a discrete axonometric chart of conduit, inserter pin, tethers and the pin cover that has spring clip second embodiment, and this clip has a transverse stop that connects pin cover and sheathed catheter joint, is locked in the pin cover up to the sharp distal of inserter pin;

Figure 43 is the cross-sectional view of proximal part of a part, tethers, pin cover and the sheathed catheter joint of the pin cover that has spring clip second embodiment, inserter pin, this spring clip has the transverse stop of a connection pin cover and sheathed catheter joint, sharp distal up to the inserter pin is locked in the pin cover, and the sharp distal that this sheathed catheter joint has an inserter pin extends out and the pin cover is connected on the sheathed catheter joint from the end of pin cover;

Figure 44 is the cross-sectional view of proximal part of distal portions, tethers and sheathed catheter joint of distal portions, the inserter pin of the pin cover that has spring clip second embodiment, needle guard joint, this spring clip has the transverse stop of a connection pin cover and sheathed catheter joint, sharp distal up to the inserter pin is locked in the pin cover, and the sharp distal of the inserter pin that this sheathed catheter joint has is locked in the pin cover and pin cover and the disengagement of sheathed catheter joint;

Figure 45 is the axonometric chart of second embodiment of the spring clip that has a transverse stop shown in Figure 42 to 44;

Figure 46 is the discrete axonometric chart of pin cover of first embodiment of conduit, an inserter pin of one and the clip locking piece that has one, the clip locking piece connects pin cover and sheathed catheter joint, is locked in the pin cover and stops the unwanted distal motion of inserter pin up to the sharp distal of inserter pin;

Figure 47 is the pin cover that has first embodiment of one clip locking piece, the part of inserter pin and the spatial partial sectional view of the proximal part that sheathed catheter saves, the clip locking piece connects pin cover and sheathed catheter joint, be locked in the pin cover and stop the unwanted distal motion of inserter pin up to the sharp distal of inserter pin, the sharp distal that the sheathed catheter joint has an inserter pin extends out and the pin cover is connected on the sheathed catheter joint from the end of pin cover;

Figure 48 is the pin cover that has first embodiment of one clip locking piece, the distal portions of inserter pin and the spatial partial sectional view of the proximal part that sheathed catheter saves, the clip locking piece connects pin cover and sheathed catheter joint, be locked in the pin cover and stop the unwanted distal motion of inserter pin up to the sharp distal of inserter pin, the sharp distal of the inserter pin that the sheathed catheter joint has is locked in the pin cover and pin cover and the disengagement of sheathed catheter joint;

Figure 49 is the axonometric chart of first embodiment of the one clip locking piece shown in Figure 46 to 48, and the clip locking piece connects pin cover and sheathed catheter joint, is locked in the pin cover and stops the unwanted distal motion of inserter pin up to the sharp distal of inserter pin;

Figure 50 is the axonometric chart of the 3rd embodiment that has the spring clip of a transverse stop, and spring clip connects pin cover and sheathed catheter joint, is locked in the pin cover up to the sharp distal of inserter pin;

Figure 51 is the 4th embodiment that has the spring clip of a transverse stop, the part of inserter pin, the part of tethers and the partial sectional perspective view of the proximal part that sheathed catheter saves, spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is locked in the pin cover, the sharp distal of the inserter pin that the sheathed catheter joint has is from the remote extension of pin cover, and the pin cover is connected to the sheathed catheter joint, and first embodiment of a mutual locking piece stops the inefficacy of transverse stop;

Figure 52 is the partial sectional perspective view that has the proximal part of the distal portions of distal portions, tethers of pin cover, inserter pin of the 4th embodiment of spring clip of a transverse stop and sheathed catheter joint, spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is locked in the pin cover, the sharp distal of the inserter pin that the sheathed catheter joint has is locked in the pin cover, and the pin cover breaks away from the sheathed catheter joint, and first embodiment of a mutual locking piece stops the inefficacy of transverse stop;

Figure 53 is the axonometric chart of the 4th embodiment that has the spring clip of a transverse stop, spring clip is used for the pin cover shown in Figure 51 and 52, connecting pin cover and sheathed catheter joint, be locked in the pin cover and first embodiment of a mutual locking piece stops the inefficacy of transverse stop up to the sharp distal of inserter pin;

Figure 54 is the pin cover that has first embodiment of one clip locking piece, the part of inserter pin and the partial sectional perspective view of the proximal part that sheathed catheter saves, the clip locking piece connects pin cover and sheathed catheter joint, be locked in the pin cover and stop the unwanted distal motion of inserter pin up to the sharp distal of inserter pin, the sharp distal of the inserter pin that the sheathed catheter joint has is gone out from the remote extension of pin cover, and the pin cover is connected to sheathed catheter joint, and one with first embodiment of spring clip from the trigger of fastening chain of sheathed catheter joint disengagement;

Figure 55 is the pin cover that has second embodiment of one clip locking piece, the part of inserter pin and the partial sectional perspective view of the proximal part that sheathed catheter saves, the clip locking piece connects pin cover and sheathed catheter joint, be locked in the pin cover and stop the unwanted distal motion of inserter pin up to the sharp distal of inserter pin, the sharp distal of the inserter pin that the sheathed catheter joint has is gone out from the remote extension of pin cover, and the pin cover is connected to the sheathed catheter joint;

Figure 56 is the partial sectional perspective view that has the proximal part of the distal portions of the second embodiment inserter pin of one clip locking piece and sheathed catheter joint, the clip locking piece connects pin cover and sheathed catheter joint, be locked in the pin cover and stop the unwanted distal motion of inserter pin up to the sharp distal of inserter pin, the sharp distal of the inserter pin that the sheathed catheter joint has is locked in the pin cover and pin cover and the disengagement of sheathed catheter joint;

Figure 57 is the axonometric chart of second embodiment of the one clip locking piece shown in Figure 55 and 56, and this locking piece connects pin cover and sheathed catheter joint, is locked in the pin cover and stops the unwanted distal motion of inserter pin up to the sharp distal of inserter pin;

Figure 58 is the partial sectional perspective view that has the proximal part of the part of a part, tethers of pin cover, inserter pin of the 5th embodiment of spring clip of a transverse stop and sheathed catheter joint, spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is locked in the pin cover, the sharp distal of the inserter pin that the sheathed catheter joint has is from the remote extension of pin cover, and the pin cover is connected to the sheathed catheter joint;

Figure 59 is the partial sectional perspective view that has the proximal part of the part of a part, tethers of pin cover, inserter pin of the 6th embodiment of spring clip of a transverse stop and sheathed catheter joint, spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is locked in the pin cover, the sharp distal of the inserter pin that the sheathed catheter joint has is from the remote extension of pin cover, and the pin cover is connected to the sheathed catheter joint;

Figure 60 is the partial sectional perspective view that has the proximal part of the distal portions of distal portions, tethers of pin cover, inserter pin of the 6th embodiment of spring clip of a transverse stop and sheathed catheter joint, spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is locked in the pin cover, the sharp distal of the inserter pin that the sheathed catheter joint has is locked in the pin cover, and pin cover and the disengagement of sheathed catheter joint;

Figure 61 is the axonometric chart of the 6th embodiment of the spring clip that has a transverse stop shown in Figure 59 and 60, and spring clip connects pin cover and sheathed catheter joint, is locked in the pin cover up to the sharp distal of inserter pin;

Figure 62 is the sketch map of a gripper-arm part, and an alternate embodiment of the engaging mechanism between pin cover and the sheathed catheter joint is shown;

Figure 63 is the sketch map of a gripper-arm part, and another alternate embodiment of the engaging mechanism between pin cover and the sheathed catheter joint is shown;

Figure 64 is the axonometric chart of a bias arm part, and an alternate embodiment of the engaging mechanism between pin and the bias arm is shown;

Figure 65 is the axonometric chart of a bias arm part, and another alternate embodiment of the engaging mechanism between pin and the bias arm is shown;

Figure 66 is the discrete axonometric chart of pin cover of second embodiment of a body canal, inserter pin and the 11 embodiment that has locking piece and spring clip, this locking piece stops the unwanted distal motion of inserter pin, this spring clip connects pin cover and sheathed catheter joint, is protected in the pin cover up to the sharp distal of inserter pin;

Figure 67 is the partial sectional perspective view of the proximal part of the part of the pin cover that has second embodiment of the 11 embodiment of locking piece and spring clip, inserter pin and sheathed catheter joint, this locking piece stops the unwanted distal motion of inserter pin, this spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is protected in the pin cover, the sharp distal of the inserter pin that this sheathed catheter joint has is from the remote extension of pin cover, and the pin cover is connected to the sheathed catheter joint;

Figure 68 is the partial sectional perspective view of the proximal part of the distal portions of the pin cover that has second embodiment of the 11 embodiment of locking piece and spring clip, inserter pin and sheathed catheter joint, this locking piece stops the unwanted distal motion of inserter pin, this spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is protected in the pin cover, the sharp distal of the inserter pin that this sheathed catheter joint has is locked in the pin cover, and pin cover and the disengagement of sheathed catheter joint;

Figure 69 is the axonometric chart of second embodiment of the spring clip shown in Figure 66 to 68, and spring clip connects pin cover and sheathed catheter joint, is protected in the pin cover up to the sharp distal of inserter pin;

Figure 70 is the discrete axonometric chart of the pin cover of conduit, the inserter pin of one and spring clip the 7th embodiment that has transverse stop, and spring clip connects pin cover and sheathed catheter joint, is protected in pin cover and the tethers up to the sharp distal of inserter pin;

Figure 71 is the partial sectional perspective view of proximal part of a part, tethers and sheathed catheter joint of pin cover, inserter pin of the 7th embodiment that has the spring clip of a transverse stop, spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is protected in the pin cover, the sharp distal of the inserter pin that the sheathed catheter joint has is from the remote extension of pin cover, and the pin cover is connected to the sheathed catheter joint;

Figure 72 is the partial sectional perspective view that has the proximal part of the distal portions of distal portions, tethers of pin cover, inserter pin of the 7th embodiment of spring clip of a transverse stop and sheathed catheter joint, spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is protected in the pin cover, and the sharp distal of the inserter pin that the sheathed catheter joint has is locked in the pin cover and pin cover and the disengaging of sheathed catheter joint;

Figure 73 is the axonometric chart of the 7th embodiment that has the spring clip of the transverse stop shown in Figure 70 to 72, and spring clip connects pin cover and sheathed catheter joint;

Figure 74 is the partial cross section view that has the proximal part of the distal portions of pin cover, inserter pin of the 8th embodiment of spring clip of a transverse stop and sheathed catheter joint, spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is protected in the pin cover, the sharp distal of the inserter pin that the sheathed catheter joint has is from the remote extension of pin cover, and the pin cover is connected in the sheathed catheter joint;

Figure 75 is the partial cross section view that has the proximal part of the distal portions of pin cover, inserter pin of the 8th embodiment of spring clip of a transverse stop and sheathed catheter joint, spring clip connects pin cover and sheathed catheter joint, sharp distal up to the inserter pin is protected in the pin cover, the sharp distal of the inserter pin that the sheathed catheter joint has is locked in the pin cover, and pin cover and the disengagement of sheathed catheter joint;

Figure 76 is the partial sectional perspective view that has the distal portions of the pin cover of modified form of locking piece the 7th embodiment and inserter pin, locking piece stops the unwanted distal motion of inserter pin, the sharp distal of inserter pin is from the remote extension of pin cover, wherein the pin cover has a clip, its connects pin cover and sheathed catheter joint, is protected in the pin cover up to the sharp distal of inserter pin; And

Figure 77 is the partial sectional perspective view that has the distal portions of the pin cover of modified form of locking piece the 7th embodiment and inserter pin; locking piece stops the unwanted distal motion of inserter pin; the sharp distal of inserter pin is locked in the pin cover; wherein the pin cover has a clip; its connects pin cover and sheathed catheter joint, is protected in the pin cover up to the sharp distal of inserter pin.

The specific embodiment

Terminology used here " near-end " refers to a position on the assembly of conduit that has a pin cover of the present invention and introducer needle, when normal the use, and the clinician of the most close this device of use in this position and use the patient of object away from this device.On the contrary, term " far-end " refers to a position on the assembly of conduit of the present invention and introducer needle, and when normal the use, the patient of object is used in this position away from the clinician who uses this device and the most close this device.

Terminology used here " top ", " on " or " up " to refer to be a position on the assembly of conduit that has a pin cover of the present invention and introducer needle, when normal the use, the skin that this position radially deviates from the longitudinal axis of this device and deviates from patient.On the contrary, terminology used here " end ", D score or " down " refer to a position on the assembly of conduit that has a pin cover of the present invention and introducer needle, and when normal the use, this position radially deviates from the longitudinal axis of this device and towards patient's skin.

Terminology used here " interior " or " upcountry " refer to a position on the assembly of conduit that has a pin cover of the present invention and introducer needle, and when normal the use, this position is towards the inside of this device.On the contrary, terminology used here " outward " or " outwards " refer to a position on the assembly of conduit that has a pin cover of the present invention and introducer needle, and when normal the use, this position is towards the outside of this device.

At this, description of the invention adopts identical label to the similar elements among the different embodiment.Although the present invention is described about the IV conduit of periphery that a typical peripheral IV conduit and has an extension (" integral type conduit ") of one, should understands the present invention and also be applicable to other conduit.For example, the present invention is applicable to the inlying catheter of extension, and this conduit requires by stylet pin to be connected on the needle guard joint, and is applicable to other medical equipment that requires pin to protect after usefulness.In addition, although the present invention reaches its illustrative purposes by many multi-form embodiment, but in the accompanying drawings and in this detailed description, only shown some preferred embodiments of the present invention, they are all within by the attached scope of the present invention that claim limited.

The assembly of conduit of the present invention and introducer needle generally identifies and stipulates that with label 10 one passes through the longitudinal axis of the extension of assembly.Referring to Fig. 1, it comprises that a conduit tube component 20 and comprises the introducer needle assembly 30 of a pin cover 40.Referring to Fig. 2, conduit tube component 20 can comprise an integrated extension tube 25.The conduit of such one is at U.S.5, general narration arranged in 697,914.As mentioned above, should be appreciated that pin cover 40 of the present invention can be used for the conduit of such one.

Conduit tube component 20 comprises a conduit 21, and it has a near-end, and a far-end and is fixed on the sheathed catheter joint 24 of catheter proximal end.Being used for conduit 21 suitable materials includes, but is not limited to such as fluorinated ethylene propylene (FEP) (FEP), polytetrafluoroethylene (PTFE), the thermoplastic resin of polyurethane and so on.Preferably, conduit 21 is made up of a kind of thermoplastic hydrophilic polyurethane, and it is exposed under the intravital physiological condition of patient and can softens.The material that is applicable to sheathed catheter joint 24 includes, but is not limited to such as Merlon polystyrene, the thermoplastic polymer resin of polypropylene and so on.Sheathed catheter joint 24 can comprise a contact pin that extends radially outwardly, and it can be used for conduit 21 is advanced patient's blood vessel.

Introducer needle assembly 30 comprises introducer needle 31, and it has the near-end that the sharp distal 32 and that is formed with an inclined-plane is connected in needle guard joint 34.Introducer needle 31 is preferably made by rustless steel, and its longitudinal axis is arranged essentially parallel to the longitudinal axis of the assembly 10 of conduit and introducer needle.Needle guard joint 34 can comprise that one has the reflector cavity of the one of an open proximal end.Needle guard joint 34 can be made up of the material of the same-type that is used for forming sheathed catheter joint 24.Certainly, other material also can be used to form needle guard joint 34.Preferably, open proximal end is stopped up flow of liquid by an exhaust piston 36, and this exhaust piston allows air but do not allow the flow of liquid mistake.

Introducer needle assembly 30 also comprises pin cover 40, and it is included in its inner shell 41 that forms an internal chamber 42.Shell 41 also forms the distal openings 45 of a proximal openings 43 and an internal chamber 42 connections.But this makes introducer needle 31 longitudinal extensions by shell 41.Chamber 42, the diameter of proximal openings 43 and distal openings 45 is slightly larger than the diameter of the major part of introducer needle 31 at least.This makes introducer needle 31 easily by pin cover 40.Preferably, chamber 42 and distal openings 45 are slightly larger than any discontinuous part that is formed on the introducer needle 31 at least, and it will be described hereinafter.This allows the distal portions of introducer needle 31 to recall in the shell 41, but stops introducer needle 31 closely laterally to be recalled from pin cover 40, and this will be described hereinafter.

As hereinafter narrating, do not using spring clip of the present invention place, shell 41 can comprise a bead 46 of radially extending and the finger-type thing 47 of a plurality of longitudinal extensions.Finger-type thing 47 can comprise radially outstanding 48 of inwardly sensing.Finger-type thing 47 and outstanding 48 engages sheathed catheter joint 24, so that introducer needle assembly 30 and conduit tube component 20 are kept together.Usually, sheathed catheter joint 24 comprises a thread or an ear 44 in the radial projection of its near-end so that with being connected of other device.This provides and has been used for and the part of the sheathed catheters joint 24 that finger-type thing 47 and outstanding 48 combines, and like this, sheathed catheter joint 24 still keeps being connected with introducer needle assembly 30, removes from conduit tube component 20 and is protected by pin cover 40 up to introducer needle 31.

Introducer needle 31 comprise along its distal portions, form discontinuous part thereon.This discontinuous part can take various forms.For example, it can be the part 38 (seeing Fig. 3 A, 3B, 3C and 3G) that a diameter amplifies, or a groove 39 (seeing Fig. 3 D and 3G), or the part 38 of diameter amplification and the combination (seeing Fig. 3 E, 3F and 3G) of a groove 39.For discontinuous part 38 are situations of the diameter part of amplifying, and proximal part 38a can be convergent, and distal portions 38b can be the shoulder towards the distally, and its orientation is approximately perpendicular to the longitudinal axis (seeing Fig. 3 A) of introducer needle 31.Perhaps, for example see Fig. 3 C, distal portions 38b can be convergent.This dwindling gradually can almost be between almost being parallel to and any angle between the longitudinal axis perpendicular to introducer needle almost.Preferably, as Fig. 3 A, 3C, the diameter amplifier section 38 shown in 3F and the 3G form on introducer needle 31 by centerless grinding one larger-diameter introducer needle.Although diameter amplifier section 38 circumferentially is provided with at the axle that Zhu Tuzhong is expressed as around introducer needle 31, should be understood that diameter amplifier section 38 can asymmetricly form around the axle of introducer needle 31.For example, the diameter amplifier section can form as the part (seeing Fig. 3 B and 3E) of flattening on introducer needle 31.For fear of doubt, terminology used here " diameter " refers to the collinear length by an object center.

To the discontinuous part that is used for introducer needle 31 is the situation of diameter amplifier section 38, no matter which kind of special construction is used for the diameter amplifier section is, the diameter that this part should have is greater than the diameter of proximal openings 43.This provides a kind of mechanism to guarantee that introducer needle 31 can not pull out outside the pin cover 40 fully along the direction of a nearside.This is because diameter amplifier section 38 has blocked the further motion towards nearside of introducer needle 31 by proximal openings 43.Perhaps, a packing ring 49 with an opening is put into chamber 42, and the proximal wall of adjacent chamber 42, the slightly larger in diameter of this opening is in the diameter of the main part of introducer needle 31, but less than the diameter of diameter amplifier section 38.In this position, the opening of packing ring 49 aligns with proximal openings 43.Therefore packing ring 49 can stop diameter amplifier section 38 by proximal openings 43.

Perhaps, if if groove 39 as discontinuous part or invariably continuous part be used for introducer needle, a tethers 50 can be used to connect pin cover 40 and needle guard joint 34 (for example seeing Figure 42).The effective length that tethers 50 must be configured to it can not make sharp distal 32 closely laterally pull out pin cover 40 fully.

The diameter of diameter amplifier section 38 cans be compared to most the overall diameter of main part of introducer needle 31 at least about big 0.002 inch.Unexpectedly find, within the scope of the invention, this size be enough to sharp distal 32 closely laterally recall enter pin cover 40 after, prevent that the sharp distal 32 of introducer needle 31 from distad shifting out pin cover 40.To diameter amplifier section 38 be arranged on symmetrically 31 of introducer needles around situation, the diameter of main part that the diameter of diameter amplifier section 38 cans be compared to most introducer needle 31 is big approximately 0.004 inch.This diameter is poor in order to ensure reaching, and sees Fig. 3 A, makes one to move back to dial and increase progressively slightly towards the far-end of inserter pin 31 from distal portions 38b, and that part of direct far-end that can form inserter pin 31 is to distal portions 38b.That grinds inserter pin 31 that part ofly forms direct far-end and this of distal portions 38b moved back dials.

In case sharp distal 32 is closely laterally recalled inserting needle cover 40, locking piece can prevent that the sharp distal 32 of inserter pin 31 from running out of the unwanted distal motion of the far-end of pin cover 40, and this locking piece can take various forms.Here used word " the unwanted distal motion of inserter pin 31 " refers to, between the normal operating period of the assembly 10 of conduit and inserter pin, and under the normal condition, for example after locking piece engages inserter pin 31, the distal movement of the inserter pin 31 that sharp distal 32 does not come out from the distal openings 45 of pin cover 40 once more.

Shown in Fig. 4 to 7, locking piece can be the form of a spring brake 100, and it can comprise an isolating bias mechanism 150, so that inserter pin 31 is locked in the pin cover 40.In the embodiment of this locking piece, discontinuous part is a diameter amplifier section 38 preferably.

The chamber 42 that spring brake 100 and bias mechanism 150 are positioned at the shell 41 of pin cover 40 also centers on inserter pin 31.Spring brake 100 has a pair of fork that separates 110, and they link to each other at base portion 120.Fork 110 should form a part that has a distance at least therebetween, this distance be slightly larger than inserter pin 31 main bodys diameter and less than the diameter of diameter amplifier section 38.This main body that allows inserter pin 31 is between two forks 110, and it is closely laterally mobile to pass through fork 110.Base portion 120 can be approximately perpendicular to fork 110 and extend, and so that more surface area contact bias mechanism 150 to be provided, bias mechanism will be described below.Although the face of spring brake 100 is shown as general U-shaped in the drawings, should be appreciated that other shape also can be used for the face of spring brake 100 as long as this shape allows at least one fork 110 to engage diameter amplifier section 38.For example, the face of spring brake 100 can have a V-arrangement or L shaped.

Bias mechanism 150 force spring brake 100 upwards to contact inserter pin 31 and guarantee to pitch 110 and base portion 120 still near inserter pin 31.Bias mechanism 150 can be taked any suitable form.For example, the helical spring that it can be as shown in Figs. 4-6, perhaps it can be the compressible material as a spring resemble rubber, perhaps it can be configured to a slice spring.In addition, bias mechanism 150 and fork 110 can be integrated as an element.

When inserter pin 31 was closely laterally recalled inserting needle cover 40, the main body of inserter pin 31 was by between two forks 110.When diameter amplifier section 38 abuts tines 110, spring brake 100 is near laterally to rotate and the proximal movement by diameter amplifier section 38 is pressed against downwards on the bias mechanism 150.This makes diameter amplifier section 38 closely laterally by fork 110.Comparison diagram 4 and Fig. 5.In case diameter amplifier section 38 is at the nearside of fork 110, as shown in the figure, bias mechanism 150 pressuring spring locks 100 clockwise directions rotate, and turn back to inserter pin 31 to engage.When diameter amplifier section 38 is positioned at the nearside of

fork

110,32 nearsides that are positioned at distal openings 45 of sharp distal.See Fig. 6.Similarly, all embodiment disclosed herein are configured to make sharp distal 32 to be locked in the pin cover 40 of nearside of distal openings 45.

The diameter amplifier section 38 that the subsequent distal movement of inserter pin 31 is engaged and the prevention of fork 110.Because fork 110 engages the distal end wall of chamber 42, can not far laterally move through this distal end wall so pitch 110.Therefore, if a clinician attempts to advance inserter pin 31 to far-end after diameter amplifier section 38 moves on to fork 110 nearside, diameter amplifier section 38 will be conflicted and be pitched 110, pitch 110 distal end walls of conflicting chamber 42 again in turn.Bias mechanism 150 is guaranteed to pitch 110 and still is bonded on the inserter pin 31.As mentioned above, because diameter amplifier section 38 has blocked the further proximal movement of inserter pin 31 by proximal openings 43 or packing ring 49, so inserter pin 31 is prevented from from the motion of pin cover 40 further proximads.Perhaps, a tethers 50 that connects pin cover 40 and needle guard joint 34 can be used to prevent that inserter pin 31 from running out of undesirable motion of pin cover 40 proximads.

Second embodiment of the locking piece of the unwanted distal motion of prevention inserter pin 31 is a slice springs 200.See Fig. 8 to 10, sheet spring 200 has a proximal wall 210, is formed with an opening 215 in the wall, and opening aligns with the proximal openings 43 of chamber 42.Proximal wall 210 is basically perpendicular to the longitudinal axis of inserter pin 31.Diameter amplifier section 38 is used for the situation of inserter pin 31, and opening 215 preferably has the diameter of at least one slightly larger in diameter in the main part of inserter pin 31, but less than the diameter of diameter amplifier section 38.Certainly, run out of the near edgewise motion of pin cover 40,, there is no need to comprise proximal wall 210 and opening 215 for sheet spring 200 as long as proximal openings 43, packing ring 49 or tethers 50 are used for preventing sharp distal 32.

Sheet spring 200 also has the lock legs 230 that a supporting leg 220 and favours supporting leg 220, makes lock legs 230 roughly towards the direction of proximal wall 210, and like this, lock legs 230 preferably is not orthogonal to supporting leg 220.Preferably, lock legs 230 trends towards being parallel to supporting leg 220.Shown in Fig. 8-10, supporting leg 220 and lock legs 230 preferably relative to each other, like this, sheet spring 200 has roughly a V-arrangement, Yi Bian lie low, the top of V-arrangement is towards far-end.The structure of this V-arrangement guarantees lock legs 230 deflection inserter pins 31 and favours supporting leg 220.

Lock legs 230 comprises a pair of fork that separates 240.At least a portion along two forks 240 limits a distance therebetween, it be slightly larger than inserter pin 31 main part diameter and less than the diameter of diameter amplifier section 38.This allows the main part of inserter pin 31 to extend between two forks 240 and closely laterally move through and pitches 240.The orientation of the two forks 240 on lock legs 230 preferably is rendered as v-shaped structure roughly.

Along with inserter pin 31 is closely laterally recalled inserting needle cover 40, the main part of inserter pin 31 is by between two forks 240.Pitch 240 when diameter amplifier section 38 in abutting connection with two, as shown in the figure, they counterclockwise rotate.This allows diameter amplifier section 38 closely laterally to move through two forks 240.In case diameter amplifier section 38 is positioned at the nearsides of two forks 240, as shown in the figure, the bias voltage of sheet spring 200 rotates lock legs 230 and two fork 240 clockwise directions, turns back to and the engaging of inserter pin 31.If inserter pin 31 then distad moves, as shown in the figure, lock legs 230 and two fork 240 will continue clockwise direction and rotate.This force inserter pin 31 upwards with the wall fluid-tight engagement of the chamber 42 that forms pin cover 40.Thereby prevent that sharp distal 32 is exposed once more.Inserter pin 31 any distal motion is thereafter all stoped, if enough power distad is applied on the inserter pin 31, then as shown in Figure 9, distal movement can cause the flexing of inserter pin 31 and for good and all inserter pin 31 is locked in the pin cover 40.

By the joint of diameter amplifier section 38 and proximal wall 210, the further nearside of inserter pin 31 is stoped to motion.Moreover, if any requiring, can use a tethers 50 that connects pin cover 40 and needle guard joint 34, stop this inserter pin 31 moving with respect to the unwanted proximal of pin cover 40.

The 3rd embodiment of the locking piece of the unwanted distal motion of prevention inserter pin 31 is a slice springs 300.See Figure 11 to 13, sheet spring 300 has a proximal wall 310, is formed with an opening 315 in the wall, and opening aligns with the proximal openings 43 of chamber 42.Proximal wall 310 is basically perpendicular to the longitudinal axis of pin cover 40.Diameter amplifier section 38 is used for the situation of inserter pin 31, and opening 315 preferably has the diameter that a diameter is slightly larger than the main part of inserter pin 31, but less than the diameter of diameter amplifier section 38.Certainly, as long as proximal openings 43, packing ring 49 or tethers 50 are used for preventing that sharp distal 32 from running out of the near edgewise motion of pin cover 40, for sheet spring 300, there is no need to comprise proximal wall 310 and opening 315.

Sheet spring 300 also has the lock legs 330 that a supporting leg 320 and favours supporting leg 320, so that lock legs 330 is roughly towards the direction of proximal wall 310 and be not orthogonal to supporting leg 320.Preferably, lock legs 330 trends towards being parallel to supporting leg 320.As shown in figure 11, supporting leg 320 and lock legs 330 preferably relative to each other, like this, sheet spring 300 has roughly a V-arrangement, Yi Bian lie low, the top of V-arrangement is towards far-end.The structure of this V-arrangement guarantees that lock legs 330 deflection inserter pins 31 or lock legs 330 can different angles favour supporting leg 320.For example lock legs 330 can favour supporting leg 320 near 90 ° angle.See Figure 17 and compare supporting leg 620 and lock legs 630.Really, lock legs 330 in fact can be perpendicular to supporting leg 320, or is being parallel to or perpendicular to any orientation for place between the supporting leg 320.Main criteria for sheet spring 300 structures is to make lock legs 330 towards 31 biasings of inserter pin, and like this, it engages diameter amplifier section 38.

That part of profile of lock legs 330 and inserter pin 31 adjacency can form the cross section of semicircle basically, with the circumferential section of approximate inserter pin 31 main parts.When inserter pin 31 nearsides moved through lock legs 330, this had reduced the drag force on inserter pin 31 as far as possible.

In the embodiment of Figure 11 to 13, preferably used the diameter amplifier section 38 shown in Fig. 3 A.This embodiment comprises and moves back the distal portions 38b that the proximal part 38a and that dials is basically perpendicular to the longitudinal axis of inserter pin 31.Yet, should be appreciated that other embodiment that also can use discontinuous part on the inserter pin 31.In addition, the end of the lock legs 330 that engages with discontinuous part can be similar to and be configured to mechanically engage with discontinuous part.For example, if groove 39 is used as discontinuous part, the part of the lock legs 330 that engages with groove 30 will comprise that a contact pin is to engage this groove.For example, referring to the contact pin among Figure 31.

Along with inserter pin 31 is closely laterally removed inserting needle cover 40, lock legs 330 is on the main part of inserter pin 31.Along with the amplifier section nearside is crossed lock legs 330 to floor mop, lock legs 330 is also on diameter amplifier section 38.Have and move back the proximal part 38a that dials and be convenient to diameter amplifier section 38 and move through lock legs 330, so diameter amplifier section 38 is positioned at the proximal lateral of lock legs 330.If shift at diameter amplifier section 38 and distal portions 38b lock legs 330 near-end nearside to after, inserter pin 31 distad moves, and then the near-end of lock legs 330 will engage distal portions 38b and stop the edgewise motion further far away of inserter pin 31.In addition, as shown in the figure, this distally will make lock legs 330 clockwise directions rotate to the power that is applied on the inserter pin 31.This forces inserter pin 31 upwards tightly to engage with the wall of the chamber 42 of pin cover 40 and stops sharp distal 32 exposed once more.

The joint of diameter amplifier section 38 and proximal wall 310 has stoped the further proximal movement of inserter pin 31.Moreover, if any requiring, can use a tethers 50 that connects pin cover 40 and needle guard joint 34, stop this inserter pin 31 moving with respect to the unwanted proximal of pin cover 40.

Figure 14 and 15 illustrates the 4th embodiment of the locking piece of the unwanted distal motion that stops inserter pin 31.The 4th embodiment is a slice spring 400, and it comprises a proximal wall 410 that supports a pair of supporting leg 420, and each supporting leg is connected in a lock legs 430.Proximal wall 410 wherein forms an opening 415, and inserter pin 31 can extend by opening.Proximal wall 410, supporting leg 420 and lock legs 430 are configured to: lock legs is towards the main part biasing of inserter pin 31.In the present embodiment, inserter pin 31 preferably includes diameter amplifier section 38 as shown in Figure 3A.Although have as described above, also can use other embodiment of discontinuous part.

Lock legs 430 can be at a wide angular range interior orientation with respect to supporting leg 420.Preferably, lock legs 430 with respect to the inclination angle of supporting leg less than 90 °.No matter which kind of angle orientation, lock legs 430 must engage with distal portions 38b, to stop the unwanted distal motion of inserter pin 31.

Along with inserter pin 31 is closely laterally removed inserting needle cover 40, lock legs 430 is on the main part of inserter pin 31.Along with the amplifier section nearside is crossed lock legs 430 to floor mop, lock legs 430 is also on diameter amplifier section 38.Have and move back the proximal part 38a that dials and be convenient to diameter amplifier section 38 and move through lock legs 430, so diameter amplifier section 38 is positioned at the proximal lateral of lock legs 430.If shift at diameter amplifier section 38 and distal portions 38b lock legs 430 near-end nearside to after, inserter pin 31 distad moves, and then the end of lock legs 430 will engage distal portions 38b and stop the edgewise motion further far away of inserter pin 31.

The joint of diameter amplifier section 38 and nearside 310 has stoped the further proximal movement of inserter pin 31.Moreover, if any requiring, can use a tethers 50 that connects pin cover 40 and needle guard joint 34, stop this inserter pin 31 moving with respect to the unwanted proximal of pin cover 40.

Shown in Figure 14 and 15, sheet spring 400 and shell 41 can be configured to improve the mechanical engagement between lock legs 430 and the diameter amplifier section 38.This can be achieved by following manner: after diameter amplifier section 38 is removed in the pin cover 40 of the nearside of lock legs 430 into, make sheet spring 400 shift-in chamber 42 far laterally.In the present embodiment, chamber 42 has and moves back the cross section of dialling.This group interior diameter that promptly is chamber 42 that moves back progressively reduces towards distal portions from proximal part.This move back to dial should be enough to engage supporting leg 420 and force supporting leg 420 towards inserter pin 31.Preferably, by between the longitudinal axis of the wall of chamber 42 and inserter pin 31 angle limited that this moves back and dials the quiet slide angle that forms between should the wall less than 90 ° of surfaces that deduct supporting leg 420 and chamber 42.Adopt this structure, inserter pin 31 any distal movement thereafter will make sheet spring 400 far laterally move for inserter pin 31, up to the wall of dialling that moves back of supporting leg 420 splice enclosure 41.Dial wall along with supporting leg 420 engages to move back, lock legs 430 is forced to contact more closely with the axle of inserter pin 31, and even can wrap up in the face of inserter pin 31 and go.Tight contact between this lock legs 430 and the distal portions 38b is guaranteed the clinician under normal circumstances with in normal mode, and using the assembly 10 of conduit and inserter pin not surpass is the needed power of mechanical engagement that overcomes between lock legs 430 ends and the distal portions 38b.

The 5th embodiment of locking piece that stops the unwanted distal motion of inserter pin 31 is the variant of the 4th embodiment of locking piece that stops the unwanted distal motion of inserter pin 31, and when inserter pin 31 is removed inserting needle cover 40, it will be reduced to minimum in the drag force on the inserter pin 31.See Figure 16.The 5th embodiment is a slice spring 500.It comprises a proximal wall 510 that supports a pair of supporting leg 520, and each supporting leg is connected in a lock legs 530.Proximal wall 510 wherein forms an opening 515, and inserter pin 31 can extend by opening.Proximal wall 510, supporting leg 520 and lock legs 530 are configured to: lock legs is towards the axle biasing of inserter pin 31.In the present embodiment, inserter pin 31 preferably includes diameter amplifier section 38 as shown in Figure 3A.Although have as described above, also can use other embodiment of discontinuous part.

At least one, but preferably each supporting leg 520 comprises a supporting finger-type thing 550.Each supporting finger-type thing 550 and supporting contact pin 560 cooperations that are formed on the shell 41 leave the axle of inserter pin 31 to keep each supporting leg 520.Sheet spring 500 is arranged in the chamber 42, and like this, in the time of in inserter pin 31 is retracted into pin cover 40, proximal end wall 510 distad separates with the proximal wall of chamber 42, to allow the proximal movement of sheet spring 500.As the result owing to inserter pin 31 proximal movement, when making diameter amplifier section 38 engage proximal wall 510, sheet spring 500 will closely laterally move with the successive proximal movement of inserter pin 31.This moves each supporting finger-type thing 550 and throws off with supporting contact pin 560, makes supporting leg 520 turn back to its inside position then again.In inside position, lock legs 530 engages the main part of inserter pin 31.The unwanted distal of inserter pin 31 and proximal movement are stoped with the same manner of implementing with the locking piece of the 4th embodiment.

Figure 17 and 18 illustrates the 6th embodiment of the locking piece of the unwanted distal motion that stops inserter pin 31.In the present embodiment, sheet spring 600 comprises a proximal wall 610 that supports a pair of supporting leg 620, and each supporting leg is connected in a lock legs 630.Proximal wall 610 wherein forms an opening 615, and inserter pin 31 can extend by opening.In the present embodiment, lock legs 630 needn't be towards the axle biasing of inserter pin 31.In fact, in the time of in inserter pin 31 closely laterally moves into pin cover 40, in order to be reduced to minimum in the drag force on the axle of inserter pin 31, the best axle with inserter pin 31 in the end of lock legs 630 separates.This easily is retracted in the pin cover 40 inserter pin 31.

In the present embodiment, inserter pin 31 preferably includes diameter amplifier section as shown in Figure 3A.Though discuss the front, also can use other embodiment of discontinuous part.

Chamber 42 has a proximal part and a distal portions, wherein the diameter of proximal part is less than the diameter of distal portions, before inserting a conduit in one patient body, when sharp distal 32 was positioned at the far-end of pin cover 40, sheet spring 600 roughly was located at the distal portions of chamber 42.Along with inserter pin 31 continues closely laterally to move into pin cover 40, diameter amplifier section 38 is shifted to the nearside of lock legs 630, then engages proximal wall 610, and then sheet spring 600 is drawn in the proximal part of chamber 42 again.Thereby the less diameter of proximal part forces the main part of supporting leg 620 lock legs 630 towards inserter pin 31, like this, lock legs 630 can be bonded on diameter amplifier section 38 the distally but near the inserter pin 31 of diameter amplifier section 38.

Sheet spring 600 comprise at least one (being preferably two) radially outward, the biasing finger-type thing 650 that extends from supporting leg 620.Shell 41 is formed with the groove 660 of admitting each finger-type thing 650, and wherein, each groove 660 has the shoulder of a proximad.Along with sheet spring 600 is drawn in the proximal part of chamber 42 by nearside to ground by the joint between diameter amplifier section 38 and the proximal wall 610, because the finger-type thing touches the inwall of shell 41, so finger-type thing 650 curves inwardly.Yet in case finger-type thing 650 aligns with groove 660, finger-type thing 650 can return to its outside position and move into groove 660.The joint of the shoulder of the groove 660 of finger-type thing 650 dough-making powder proximads has stoped the thereafter any far away edgewise motion of sheet spring with respect to shell 41.When sheet spring 600 is arranged in this position of shell 41, the end abutment of lock legs 630 the distally of diameter amplifier section 38 but the inserter pin 31 of contiguous diameter amplifier section.Therefore, by the end of lock legs 630 and the joint of distal portions 38b, the 31 any unwanted distal motions of inserter pin have been stoped.

Figure 19 to 21 shows the 7th embodiment of the locking piece that stops the motion of inserter pin 31 unwanted distal.In the present embodiment, sheet spring 700 comprises the proximal wall 710 of a supporting one supporting leg 720, and supporting leg 720 is connected to a lock legs 730 again in turn.Proximal wall 710 forms an opening 715 betwixt, and inserter pin 31 is extensible by this opening.Lock legs 730 preferably is approximately perpendicular to supporting leg 720 and forms an opening 735 therein.The diameter of opening 735 preferably be slightly larger than inserter pin 31 main part diameter but less than the diameter of diameter amplifier section 38.Proximal wall 710, supporting leg 720 and lock legs 730 are configured to: lock legs 730 is towards 31 biasings of inserter pin.Certainly, the orientation of sheet spring 700 can be any angle around the longitudinal axis of inserter pin 31, and supporting leg is towards 31 biasings of inserter pin like this.

In the present embodiment, inserter pin 31 must comprise diameter amplifier section 38.Preferably use the diameter amplifier section 38 shown in Fig. 3 c.

On the position of sheet spring 700 non-lockings and biasing, the sharp distal 32 of inserter pin 31 is positioned at the distally of the far-end of pin cover 40, and lock legs 730 contact and towards 31 biasings of inserter pin.See Figure 19.Along with inserter pin 31 is closely laterally recalled inserting needle cover 40, lock legs 730 is striden on the surface that stands in inserter pin 31.Lock legs 730 can comprise one 31 that contact with the inserter pin, near laterally or far away laterally towards contact pin 738, being reduced to minimum in the drag force on the inserter pin 31.In case the sharp distal of inserter pin 31 is shifted to the nearside of lock legs 730, sheet spring 700 turns back to that it is not offset, i.e. the position of Zhi Donging, and like this, opening 735 aligns with the longitudinal axis of inserter pin 31 and distal openings 45 basically.If after this inserter pin 31 far laterally moves with respect to pin cover 40, the sharp distal of inserter pin 31 is extended by opening 735, up to diameter amplifier section 38 coupling openings 735.Therefore the unwanted distal that has stoped inserter pin 31 to motion, like this, sharp distal 32 can not exposed outside pin cover 40 once more.

By the joint of diameter amplifier section 38 and proximal wall 710, the further nearside that has stoped inserter pin 31 is to motion.Moreover, sheet spring 700 be there is no need to comprise proximal wall 710 and opening 715, use proximal openings 43, packing ring 49 or tethers 50 as long as replace, stop inserter pin 31 with respect to this unwanted proximal of pin cover 40 to motion.

Lock legs 730 can have the funnelform structure 736 of an adjacent openings 735.This funnel-shaped structure 736 is as the guide of inserter pin 31, to guarantee: if when it is distad mobile inserter pin 31 is recalled inserting needle cover 40 after, it passes through opening 735.Funnel-shaped structure 736 is configured to the shape complementarity that moves back the distal portions 38b that dials with the diameter amplifier section 38 shown in Fig. 3 c.

Figure 22 to 25 shows the 8th embodiment of the locking piece that stops the motion of inserter pin 31 unwanted distal.In the present embodiment, inserter pin 31 must comprise diameter amplifier section 38.Preferably use the diameter amplifier section 38 shown in Fig. 3 c.

The locking piece of present embodiment is a slice spring 800, and it comprises a supporting leg 820 and the lock legs 830 that is connected with supporting leg 820 that a proximal wall 810, is connected with an end of proximal wall 810.In addition, sheet spring 800 comprises the lock arm 850 of an outside biasing that is connected with the other end of proximal wall 810.One opening 815 is formed in the proximal wall 810, and an opening 835 is formed in the lock legs 830.Opening 815 and 835 allows inserter pin 31 by therebetween.The slightly larger in diameter of opening 835 is in the diameter of diameter amplifier section 38, and the diameter of opening 815 is less than the maximum gauge of diameter amplifier section 38.

The chamber 42 of shell 41 forms a proximal part, a mid portion and a distal portions, and wherein, the diameter of mid portion is less than the diameter of proximal part and distal portions.Because this structure, chamber 42 form the shoulder 860 and the one side shoulder 870 distad of a proximad.Sheet spring 800 initially is positioned at the mid portion of chamber 42, like this, and lock legs 830 proximal surfaces shoulder 870 distad.In addition, sheet spring 800 is positioned at the mid portion of chamber 42, and like this, it can closely laterally move with respect to shell 41.

Sharp distal 32 recall enter pin cover 40 before, sheet spring 800 is positioned at position shown in Figure 22, like this, lock legs 830 is approximately perpendicular to the axle of inserter pin 31.Along with inserter pin 31 closely laterally moves into pin cover 40, diameter amplifier section 38 is by the opening 835 of lock legs 830, up to the near-end joint proximal wall 810 of diameter amplifier section 38.Because the diameter of opening 815 has stoped successive, the near edgewise relative motion of inserter pin 31 with respect to sheet spring 800 less than the maximum gauge of diameter amplifier section 38.Yet successive, the near edgewise motion of inserter pin 31 is closely laterally moved sheet spring 800, leans against on the proximal wall of chamber 42 up to proximal wall 810 adjacency.In this, the further proximal movement of inserter pin 31 and sheet spring 800 is prevented from.

Because lock legs 830 proximal surfaces shoulder 870 distad, so sheet spring 800 rotates lock legs 830 with respect to the proximal movement of shell 41.When lock legs 830 is oriented in change with respect to this of inserter pin 31, so lock legs 830 is no longer perpendicular to inserter pin 31.Compare Figure 22 and 23.In addition, the proximal movement of sheet spring 800 becomes lock arm 850 to align with the larger diameter proximal portion of chamber 42.This makes lock arm 850 move on to its outside position, enters the proximal part of chamber 42 away from inserter pin 31, like this, and the shoulder 860 of lock arm 850 proximal surface proximads.In this position, stoped thereafter any far away edgewise motion of sheet spring 800 with respect to shell 41.

When lock legs 830 during no longer perpendicular to inserter pin 31, opening 835 is diagonal to diameter amplifier section 38.Therefore, on this orientation, the effective diameter of opening 835 is approximately equal to the diameter of inserter pin 31 main parts less than the diameter of diameter amplifier section 38.Terminology used here: " effective diameter ", refer to when opening 835 project to one perpendicular to the plane of the longitudinal axis of inserter pin 31 on the time, the diameter of opening 835 images.Because the effective diameter of opening 835 is less than the diameter of the diameter amplifier section 38 of direction shown in Figure 23 and 25, diameter amplifier section 38 is prevented from the distally to moving through lock legs 830, and sharp distal 32 is locked in the pin cover 40 effectively.Really, along with inserter pin 31 distally to motion, adhesion between lock legs 830 and the inserter pin 31 increases, and makes diameter amplifier section 38 distally become extremely difficult to the lockout failure that moves, makes by lock legs 830.

Figure 26 to 28 shows the 9th embodiment of the locking piece that stops the motion of inserter pin 31 unwanted distal, and it is a pipe 900.In the present embodiment, the diameter amplifier section preferably of the discontinuous part on inserter pin 31.Although can use other embodiment of diameter amplifier section 38, preferably use diameter amplifier section 38 as shown in Figure 3A.

Pipe 900 is positioned at chamber 42 and comprises at least one movably lance shape contact pin 950, and it extends inward into pipe 900 along proximal direction.The opposite side that is preferably in pipe 900 forms two such contact pin 950.The internal diameter of the far-end of pipe 900 is greater than the diameter of diameter amplifier section 38, so that inserter pin 31 freely moves within it.Because contact pin 950 is movably, so along with inserter pin 31 is closely laterally removed inserting needle cover 40, diameter amplifier section 38 can move through the near-end of contact pin 950.Moreover by moving back the proximal part 38a that dials, inserter pin 31 is easily by contact pin 950 proximal motion.In case inserter pin 31 is closely laterally removed inserting needle cover 40, like this, contact pin 950 is in the distally of distal portions 38b, and the combination of near-end and diameter amplifier section 38 by contact pin 950 will stop the 31 any unwanted distal motions of inserter pin.The further proximal movement of inserter pin 31 is prevented from because of the joint of diameter amplifier section 38 and proximal openings 43.Perhaps, the interior diameter that the proximal part of pipe 900 forms is walked out the unwanted proximal movement of pipe 900 less than the diameter of diameter amplifier section 38 to stop the inserter pin.In addition, can use packing ring 49 or tethers to stop unwanted proximal movement.

Figure 29 to 32 shows the tenth embodiment of the locking piece that stops the motion of inserter pin 31 unwanted distal.This locking piece is a speed change nut 1000, and it forms a through hole 1010, and the slightly larger in diameter of through hole is in the diameter of the main part of inserter pin 31.This allows inserter pin 31 to extend through speed change nut 1000.Speed change nut 1000 comprises at least one but preferably a plurality of movable tabs 1020, and they extend from the main part 1030 of speed change nut 1000.Contact pin 1020 is towards inserter pin 31 biasing, so their nearsides orientation and extend internally towards the near-end of inserter pin 31.The far-end of contact pin 1020 is connected with the main part 1030 of speed change nut 1000, for example, and by a hinge alive.Referring to Figure 32.

Because contact pin 1020 is nearside orientations and removable, so along with inserter pin 31 is closely laterally removed inserting needle cover 40, diameter amplifier section 38 can easily move through the near-end of contact pin 1020.Make contact pin 1020 be positioned at the distally of diameter amplifier section 38 in case inserter pin 31 is closely laterally removed inserting needle cover 40, the unwanted distal motion of inserter pin 31 is prevented from because of the joint of the distal portions 38b of the near-end of contact pin 1020 and diameter amplifier section 38.The orientation of the nearside roughly of contact pin 1020 also causes contact pin 1020 surface of inserter pin 31 of nipping, thereby inserter pin 31 is held in place.The unwanted proximal movement of inserter pin 31 is prevented from because of the joint of diameter amplifier section 38 and proximal openings 43 or packing ring 49.Moreover, can use proximal openings 43, packing ring 49 or tethers 50 stop this unwanted proximal movement.

As shown in figure 31, the discontinuous part of inserter pin 31 can be the E such as Fig. 3, the form of the groove 39 shown in 3F and the 3G.When inserter pin 31 and groove 39 are recalled by speed change nut 1000, at least one contact pin 1020 will be dropped into groove 39.Because the joint of the part towards the distally (being proximal) of contact pin 1020 and groove 39 will stop inserter pin 31 any distal movement thereafter.A plurality of contact pin 1020 that use forms around main part 1030 guarantee to have a contact pin 1020 at least with engagement groove 39.Perhaps, can use the groove 39 that is positioned at a plurality of vertical shifts that make progress in 31 weeks of inserter pin to catch contact pin 1020.

When using a groove 39 as the discontinuous part on the inserter pin 31, for example shown in Fig. 3 D, replace a diameter amplifier section 38, use a tethers 50 that connects pin cover 40 and needle guard joint 34 to stop the unwanted proximal movement of inserter pin 31 with respect to pin cover 40.Also have, as described here, tethers 50 is to replace diameter amplifier section 38 and engaging of proximal openings 43 or packing ring 49 to reach prevention inserter pin 31 from a kind of mechanism that the proximal part of pin cover 40 is closely laterally withdrawn from.

Figure 33 to 35,37A, 37B and 37C show the 11 embodiment of the locking piece that stops the motion of introducer needle 31 unwanted distal.In the present embodiment, locking piece is a retention plate 1100, and it comprises all contact pin 1120, and they closely laterally do not extend from the main part of retention plate 1100.Specifically see Figure 37 A.Yet contact pin 1120 is by any suitable mechanism, and for example a hinge alive still is connected on the main part of retention plate 1100, and like this, contact pin 1120 is removable with respect to the main part of retention plate 1100.Contact pin 1120 forms a through hole 1130 between the end of each contact pin 1120, the slightly larger in diameter of through hole is in the diameter of the main part of inserter pin 31 but less than the diameter of diameter amplifier section 38.Retention plate 1100 is positioned at the face near the nearside of a midfeather 1140 of the chamber 42 that is formed on shell 41.Midfeather 1140 forms an opening 1145 that runs through wherein, and its diameter is greater than the diameter of diameter amplifier section 38.

Along with inserter pin 31 closely laterally moves into pin cover 40, diameter amplifier section 38 can pass through opening 1145.In addition, because will avoiding diameter amplifier section 38, contact pin 1120 closely laterally moves, so diameter amplifier section 38 is removable by contact pin 1120.Yet,, stoped thereafter any distal movement of inserter pin 31 with respect to pin cover 40 in case diameter amplifier section 38 moves on to the nearside of retention plate 1100.This is because diameter amplifier section 38 can not oppositely extend by hole 1130, but replaces, and engages the surface near the contact pin 1120 in hole 1130.In addition, because midfeather 1140 stops any this distal movement of contact pin 1120, the motion far laterally so contact pin 1120 can not be avoided diameter amplifier section 38.Any further proximal movement of inserter pin 31 is because of proximal openings 43, packing ring 49 or tethers 50 and be prevented from.

Figure 37 B and 37C show the various variants of retention plate shown in Figure 37 A.In these two kinds of variants, contact pin 1120 comprises the finger-type thing 1101 near the distal extension in hole 1130, so form the diameter in hole 1130.Finger-type thing 1101 is shown in Figure 37 B, and finger-type thing 1101 ' is shown in Figure 37 C.In Figure 37 C, the outside of finger-type thing 1101 ' becomes to move back to dial shape, and like this, they are 31 inclinations along distal direction towards the inserter pin, and the inwall of formation opening 1145 has a complementary slope.Finger-type thing 1101 and 1101 ' is filled any redundant space in the opening 1145 on the midfeather 1140 and is guaranteed the unwanted distal motion of inserter pin 31.In the situation of the variant shown in Figure 37 C, finger-type thing 1101 ' provides a bigger retentivity to inserter pin 31, to stop the unwanted distal motion of inserter pin 31.This be because: distad move shift to the nearside of retention plate 1100 at diameter amplifier section 38 along with inserter pin 31 after, finger-type thing 1101 ' will wedge opening 1145, make inserter pin 31 motion distad become difficult more.

Figure 33 to 36C, 38 and 39 illustrate one first embodiment of a resilient spring clips 1201, and clip is used for pin cover 40 is connected on the sheathed catheter joint 24, recalls inserting needle cover 40 up to the sharp distal 32 of inserter pin 31.The spring arm 151 of one V-shaped structure forms this spring clip.Spring arm 151 is arranged in the shell 41, and like this, the top of V-arrangement is directed upwards towards the top of shell 41, and when spring arm 151 was in not offset position, all lower limbs that form V-arrangement were striden on the longitudinal axis that stands in inserter pin 31.On this orientation, the motion that spring arm 151 is fit to transverse to the longitudinal axis of inserter pin 31.This motion is a regulation passage that provides along by the inclined-plane 159 on the shell 41.Referring to Figure 38 and 39.

Certainly, spring arm 151 can be arranged in the shell 41, like this, the top of arm be oriented in the longitudinal axis of inserter pin 31 concentric one the circle on other position.Desired is that spring arm 151 should be fit to the motion transverse to the longitudinal axis of inserter pin 31.The back and forth bending of spring arm 151 under bias condition is convenient at the top of V-arrangement.In addition, the top of V-arrangement can be a form of living and cutting with scissors.

When the sharp distal 32 of inserter pin 31 was positioned at the distally of pin cover 40, inserter pin 31 adjacent springs arms 151 were so that keep spring arm 151 on clamped position biasing, deactivated.Spring arm 151 comprises a gripper-arm 152, and the longitudinal axis that it is roughly parallel to inserter pin 31 extends.Gripper-arm 152 preferably has a finger-type thing 153 that forms thereon, and when spring arm 151 was in the position of clamping, it was fit to engage screw thread 44 or the corresponding brake component 26 that is formed on the sheathed catheter joint 24.Brake component 26 can be bead or the road strategic point latch ear that is emerging on the near-end of sheathed catheter joint 24.Perhaps, brake component 26 can be a groove or groove, or the form of a stake that makes progress.Although because it provides therebetween mechanical engagement reliably, so first-selected finger-type thing 153 and the brake component 26 of using, these elements are not necessary.Without any brake component, the engaging force between gripper-arm 152 and the sheathed catheter joint 24 just is limited to frictional force, and than mechanical engagement, frictional force can be easier to overcome.Yet in some cases, this frictional force can be enough.

When the sharp distal 32 of inserter pin 31 closely laterally moves into pin cover 40, thus inserter pin 31 no longer during adjacent springs arm 151, and spring arm 151 can bend towards its non-clamping position not offset, that activate and throw off with sheathed catheter and save 24 engage.This throws off sheathed catheter joint 24 and pin cover 40.Spring arm 151 can comprise the labelling 158 of a longitudinal extension, and when inserter pin 31 closely laterally moved into pin cover 40, if any, it reduced to minimum with the drag force on inserter pin 31 and the diameter amplifier section 38.In addition, spring arm 151 can comprise an arm 53 from its extension, and arm forms an opening therein.In one embodiment, arm 53 also comprises the guided way 51 of a longitudinal extension, and its guiding inserter pin 31 is towards opening 52.Referring to Figure 36 B.The slightly larger in diameter of opening 52 is in the diameter of the main part of inserter pin 31, but less than the diameter of diameter amplifier section 38.Therefore spring clip 151 can Figure 19-21 shown in sheet spring 700 same modes stop the unwanted distal motion of inserter pin 31.In another alternate embodiment, can use one to move back the opening of dialling 54 as replacing.Referring to Figure 36.Be that for 54 desired of openings the main part of formation one permission inserter pin 31 extends through part therebetween, and forms a part that does not allow diameter amplifier section 38 to pass through betwixt.

The various embodiment that should be appreciated that the resilient spring clips of hereinafter discussing can be together with any one common use among the above-mentioned locking piece embodiment, in case sharp distal 32 is closely laterally removed inserting needle cover 40, above-mentioned locking piece stops the sharp distal 32 of inserter pin 31 to walk out the unwanted distal motion of the far-end of pin cover 40.Resilient spring clips is preferably formed by rustless steel.Yet, also should give and be understood that the material that other elastic intensity is big also can be used to form resilient spring clips.

As mentioned above, the v-shaped structure of spring arm 151 guarantees that it can clamp bending between (i.e. the biasing and the position of deactivated) and non-the clamping (being position not offset and actuating).In the position of deactivated, finger-type thing 153 location enters and the engaging of sheathed catheter joint 24.Referring to Figure 34.In the position that activates, finger-type thing 153 does not engage with sheathed catheter joint 24.Referring to Figure 35.Preferably, shell 41 formation one are transverse to the slope 159 of the longitudinal axis extension of inserter pin 31.Referring to Figure 38 and 39.Slope 159 is positioned at shell 41, so that its engaging clip arm 152.Slope 159 is as a guide of gripper-arm 152, to guarantee that gripper-arm 152 and finger-type thing 153 do not rotate around sheathed catheter joint 24, in case but sharp distal 31 disengagings save 24 the nearside that is retracted into spring arm 151 that engages with sheathed catheter, they move transverse to the longitudinal axis of inserter pin 31.Although this v-shaped structure of spring clip 1201 is preferred, also can use many different structures.Desired just its orientation should allow spring arm 151 bendings, so that gripper-arm 152 and finger-type thing 153 can move into and the engaging of sheathed catheter joint 24, and can move to actuated position, throws off with sheathed catheter and saves 24 engage.

One first embodiment that has the spring clip 1211 of transverse stop can be referring to Figure 40 and 41.Spring clip 1211 is made up of spring arm 191 and gripper-arm 192.In the present embodiment, spring arm 191 is one elastic, straight and unbending parts basically.Gripper-arm 192 forms a hole 195, and inserter pin 31 extends by this hole.Spring arm 191 orientations are substantially perpendicular to inserter pin 31, and like this, the end of spring arm 191 is fixed on the shell 41.Therefore, not offset, promptly on the non-position of clamping of Zhi Donging, vertically do not align with inserter pin 31 in hole 195.Referring to Figure 41.Although the pin of inserter shown in the figure 31 is positioned at spring arm 191 tops, but should be appreciated that inserter pin 31 also can be positioned at spring arm 191 belows, and spring arm 191 is positioned at shell 41, like this, it with any direction stride across with the concentric circle of the longitudinal axis of inserter pin 31 on diameter extend.When inserter pin 31 extended through hole 195 and the far-end by pin cover 40 and enters sheathed catheter and save 24, spring arm 191 was in abutting connection with inserter pin 31, and disengagement is prevented from motion with engaging of sheathed catheter joint 24.Referring to Figure 40.Gripper-arm 192 is preferably extended perpendicular to spring arm 191 and is comprised a formation finger-type thing 193 thereon.In addition, sheathed catheter joint comprises that also one is used for the brake component 26 that engages with finger-type thing 193.As mentioned above, brake component 26 can be a bead or the road strategic point latch ear on the near-end of sheathed catheter joint 24.Perhaps, brake component 26 a desirable groove or grooves, or the form of a stake that makes progress.When inserter pin 31 extended through spring arm 191, finger-type thing 193 was bonded on the brake component 26 on the sheathed catheter joint 24, at utmost to increase the maintenance power between gripper-arm 192 and the sheathed catheter joint 24.Therefore, as long as inserter pin 31 far laterally extends through spring arm 191, gripper-arm 192 and brake component 26 still engage, so being connected of 24 maintenances of sheathed catheter joint and pin cover 40.In case the sharp distal 32 of inserter pin 31 is closely laterally recalled by spring arm 191, gripper-arm 192 turns back to the position of its non-clamping actuating, not offset, and like this, finger-type thing 193 can be thrown off with engaging of brake component 26 and moved.This makes sheathed catheter joint 24 separate with pin cover 40.

The spring clip 1211 of present embodiment also comprises a transverse stop 196, and it extended perpendicular to the following of a spring arm 191, to stop the unwanted distal motion of inserter pin 31.Therefore, when sharp distal 32 closely laterally moves through spring arm 191, transverse stop 196 is as an effective block piece that engages the sharp distal 32 of inserter pin 31, to stop the unwanted distal motion of inserter pin 31.Use this kind embodiment, on inserter pin 31, need not discontinuous part 38, and can use a tethers 50 to stop the unwanted proximal movement of inserter pin 31.

Yet, if necessary, can on inserter pin 31, use discontinuous part 38 to stop the unwanted distal motion of inserter pin 31.In this case, transverse stop 196 can use an opening 199 wherein to form together, and the diameter of opening 199 is less than the diameter of diameter amplifier section 38.Thereby opening 199 to be similar to the sheet spring 700 shown in Figure 19-21 such, can stop the unwanted distal motion of inserter pin 31.Really, if necessary, all transverse stops discussed in this article can be revised as and be included in the opening that one of them does not allow diameter amplifier section 38 to pass through therebetween.

Although the embodiment of aforesaid spring clip engages the outside of sheathed catheter joint 24, should be appreciated that spring clip and inserter pin 31 can be arranged to the inside that spring clip engages sheathed catheter joint 24.For example, spring clip can be provided with like this with respect to inserter pin 31: inserter pin 31 radially outward promotes lock arm.In case the sharp distal 32 of inserter pin 31 closely laterally moves through all spring arms, they turn back to its not offset position and move lock arm to the longitudinal axis towards pin cover 40.

Figure 42 to 45 shows one second embodiment of spring clip 1212, and clip has a transverse stop, and it is connected to pin cover 40 with sheathed catheter joint 24, in sharp distal 32 is locked in pin cover 40.The spring clip 1212 of present embodiment is except the transverse stop 296 that adds, and basically with Figure 33 to 36C, 38 is identical with the embodiment of the spring clip shown in 39.Therefore, the present embodiment of spring clip 1212 has played connecting duct cover joint 24 and pin cover 40, up to sharp distal 32 with Figure 33 to 36C, 38 modes identical with the embodiment shown in 39 are locked in the pin cover 40.

When inserter pin 31 extends through pin cover 40, so that sharp distal 32 is when being positioned at the distally of distal openings 45, spring arm 291 is in abutting connection with the axle of inserter pin 31, and biasing and move transverse stop 296 in sharp distal 32 fronts.In case sharp distal 32 closely laterally moves through spring arm 291, spring arm 291 moves to the position of non-clamping its actuating, not offset, and transverse stop 296 is positioned at the front of sharp distal 32 like this.This has stoped any unwanted distal motion of inserter pin 31.

In the situation of using transverse stop 296, preferably use a tethers 50 that the pin cover is connected in needle guard joint 34.Tethers 50 stops inserter pin 31 unwanted proximal movement with respect to pin cover 40.Tethers 50 can be taked multiple different form, for example, and a line, a pleating element, a sleeve member or an a plurality of telescopic element around inserter pin 31 around inserter pin 31.Perhaps, in the situation of using transverse stop 296, the unwanted proximal movement of inserter pin 31 can the identical mode of the above embodiments be given to stop.Like this, inserter pin 31 can form with diameter amplifier section 38, and the diameter amplifier section will be in abutting connection with proximal openings 43 or packing ring 49.

Use in the situation of diameter amplifier section 38 on inserter pin 31, spring clip 1212 can form shown in Figure 36 B or 36C like that.As mentioned above, in these embodiments, spring clip forms with an arm 53, and this arm extends from clip, similarly extends to transverse stop 296.Yet arm 53 forms an opening 52 or 54 therein.Opening 54 from one than major diameter part to a smaller diameter portion convergent.In two kinds of situations, opening 52 and 54 forms the part of its diameter less than the diameter of diameter amplifier section 38.Therefore, after spring clip 1212 moved into non-clamping position, opening 52 and 54 will roughly align with inserter pin 31.Yet, because the less part of diameter of opening 52 and 54 will stop diameter amplifier section 38 by therebetween, so will stop the unwanted distal motion of inserter pin 31.Similarly, the opening 199 shown in the embodiment of Figure 45 can be cooperated with diameter amplifier section 38, to stop the unwanted distal motion of inserter pin 31.

Figure 46 to 49 shows first embodiment of the clip locking piece 1221 of an one, and this locking piece is connected to sheathed catheter joint 24 with pin cover 40, and stops the unwanted distal motion of the sharp distal 32 of inserter pin 31.In the present embodiment, the clip locking piece 1221 of one forms with a spring arm 2191, and spring arm 2191 is the structures that have the basic U-shaped of two lower limbs 2192, and wherein, the base portion of lower limb 2192 forms the retention plate shown in Figure 37 A.Spring arm 2191 is configured to outwards biasing and can bends to realize engaging with sheathed catheter joint 24 or throwing off.Spring arm 2191 preferably is positioned in the shell 41, and like this, the base portion of U-shaped is towards the proximal part of pin cover 40, and all lower limbs 2192 are towards the longitudinal axis that is basically parallel to inserter pin 31.Discuss as other embodiment, the clip locking piece 1221 of one can have a single lower limb and a roughly L shaped structure.Referring to Figure 55 to 57.What extend radially inwardly from each lower limb 2192 is a bias arm 2193.In each bias arm 2193, form a hole 2194, extend through therebetween to allow inserter pin 31.If necessary, a pendant 2199 be positioned at each hole 2194 near, and be roughly parallel to inserter pin 31 and extend.These pendants 2199 can be such form: the hanging portion that cuts out on turning termination on the bias arm 2193 or bias arm 2193 cuts this part to form hole 2194.Along with the inserter pin is closely laterally removed inserting needle cover 40 by hole 2194, pendant 2199 reduces to minimum with the drag force on the inserter pin 31.

In addition, the distal portions of each lower limb 2192 forms a hole 2195 of passing through therebetween.Hole 2195 is fit to engage the brake component 26 on the near-end that is formed on sheathed catheter joint 24.As mentioned above, brake component 26 can have any suitable structure, and the distal portions of each lower limb 2192 can similarly have any complementary structure, so the distal portions of brake component 26 and each lower limb 2192 can engage.

When the far-end that extends through pin cover 40 when the sharp distal 32 of inserter pin 31 entered sheathed catheter and saves 24, inserter pin 31 also extended through the hole 2194 of bias arm 2193.This pulling lower limb 2192 is inwardly towards sheathed catheter joint 24, so hole 2195 engage brake parts 26.The sharp distal 32 that needs only inserter pin 31 is positioned at the distally of bias arm 2193, and this makes being connected of 40 maintenances of pin cover and sheathed catheter joint 24.In case inserter pin 31 is pulled to the nearside of bias arm 2193, lower limb 2192 freely turns back to its non-clamping position not offset, that activate, and its mesopore 2195 is engage brake part 26 no longer.Therefore, spring arm 2191 is flexible reaches and the engaging or disengagement of sheathed catheter joint 24.

Discontinuous part 38 on inserter pin 31 interacts with above-mentioned proximal wall, to stop the unwanted proximal movement of inserter pin 31, interacts with retention plate 1100, to stop the unwanted distal motion of inserter pin 31.

Perhaps, omit the situation of discontinuous part 38 from inserter pin 31 requiring, one of all bias arms can form with an extension as transverse stop.Referring to Figure 50.In the 3rd embodiment of spring clip 1213, spring clip has one sheathed catheter joint 24 is connected to the transverse stop 396 of pin cover 40, in sharp distal 32 is locked in pin cover 40, in case sharp distal 32 is retracted into the nearside of bias arm 393, transverse stop 396 stops inserter pin 31 subsequent distal movement.In addition, in the present embodiment, must pin cover 40 and needle guard joint 34 be linked together with a tethers 50, in case sharp distal 32 remove in the inserting needle cover 40, to stop inserter pin 31 unwanted proximal movement with respect to pin cover 40.The present embodiment of spring clip 1213 basically with Figure 46-49 in previous embodiment shown in the identical mode of the spring clip part of clip locking piece 1221 of one operate.

As aforesaid embodiment, each bias arm 393 preferably has near the pendant 399 that is positioned at the hole 394, roughly extends in parallel with inserter pin 31.Along with the inserter pin is closely laterally removed inserting needle cover 40 by hole 394, all pendants 399 will reduce to minimum in the drag force on the inserter pin 31.

Figure 51 to 53 shows one the 4th embodiment of spring clip 1214, and clip has one sheathed catheter joint 24 is connected to the transverse stop of pin cover 40, in sharp distal 32 is locked in pin cover 40.The present embodiment of spring clip 1214 is operated in the basic mode identical with embodiment shown in Figure 50.Unique difference is that the end of bias arm 493 forms with the finger-type thing 497 of interlocking.In case the sharp distal 32 of inserter pin 31 is closely laterally removed bias arm 493 back, these finger-type things 497 are convenient to each bias arm 493 and are locked mutually.Preferably, one of these bias arms 493 comprise two isolating finger-type things 497 that extend from the end of that bias arm, and another bias arm comprises a finger-type thing 497 from its extension.Finger-type thing is fit to extend by the space of being set up by two finger-type things on first bias arm, and two finger-type things extend into the space on finger-type thing both sides on second bias arm.When inserter pin 31 was not rejoined bias arm 493, the end of bias arm 493 was moved apart, so finger-type thing 497 may extend into their corresponding spaces, and and mutually between suitable part and bias arm 493 overlap.Along with bias arm 493 by interlocking fingers 497 thereby lock together, a transverse stop is formed by interlocking fingers 497 thus, to stop the motion of inserter pin 31 unwanted distal.

Figure 54 shows one second embodiment of the clip locking piece 1222 of one, this locking piece is connected to sheathed catheter joint 24 with pin cover 40, in pin cover 40, and this locking piece stops the unwanted distal motion of inserter pin 31 up to the sharp distal 32 of inserter pin 31.The present embodiment embodiment with the clip locking piece 1221 of the one shown in Figure 46 to 49 basically is identical, except unique is, in the present embodiment, provides one the drag force on the inserter pin 31 reduced to minimum mechanism.In the present embodiment, all holes 2294 extend through the pin 2280 maintenance alignment that are formed on the isolating hole in the bias arm 2293 by one.The structure in this pin and hole keeps the alignment of all holes, and the edge in all holes does not touch with being coupling of inserter pin 31.One tether, 2285 connecting pins 2280 and needle guard joint 34.Tether 2285 has such length: when inserter pin 31 is finished nearside to moving, so when the sharp distal 32 of inserter pin 31 is positioned at the nearside of bias arm 2293, tether 2285 will be sold 2280 nearsides and pull out bias arm 2293 to ground.In that, bias arm 2293 can outwards move and throw off and the engaging of sheathed catheter joint 24.

Figure 55 to 57 shows one the 3rd embodiment of the clip locking piece 1223 of one.In the embodiment of the clip locking piece 1223 of one, elastic spring arm 2391 forms with unique lower limb 2392, and it has roughly a L shaped structure like this.Spring arm 2391 preferably is positioned in the shell 41, and base portion extends along the longitudinal axis direction that is roughly parallel to inserter pin 31 towards the proximal part and the lower limb 2392 of shell 41 like this.Under the situation that one leg 2392 is only arranged, need to use unique bias arm 2393.Bias arm 2393 wherein forms a hole, and inserter pin 31 extends by this hole.The embodiment of this spring arm 2391 operates in the mode identical with the embodiment shown in Figure 46 to 49, and the distal portions of lower limb 2392 can have the structure identical with lower limb 2192.When inserter pin 31 extended by the hole on the bias arm 2393, as long as the sharp distal 32 of inserter pin 31 is positioned at the distally of bias arm 2393,2392 of lower limbs inwardly dragged and engage with sheathed catheter joint 24.In case inserter pin 31 is moved the nearside of bias arm 2393 to, 2392 of lower limbs freely turn back to non-clamping position its actuating, not offset.Therefore spring arm 2391 is flexible reaches and the engaging or disengagement of sheathed catheter joint 24.

Figure 58 shows one the 5th embodiment of the spring clip 1215 that has a transverse stop 596, and in the present embodiment, spring arm 591 forms with unique lower limb 592, and it has a roughly L shaped structure like this.Under the situation that one leg 592 is only arranged, use unique single bias arm 593.This list bias arm 593 forms with the extension as a transverse stop 596, in case sharp distal 32 is retracted into the nearside of bias arm 593, will stop inserter pin 31 subsequent distal movement.The present embodiment of spring clip 1215 is operated in substantially identical with the spring clip part of the clip locking piece 1223 of the one shown in Figure 55-57 mode.

Figure 59 to 61 shows one the 6th embodiment of the spring clip 1216 that has a transverse stop.In the present embodiment, spring clip 1216 forms so that the structure of X-shaped roughly to be provided with the lower limb 692 of pair of cross.Spring clip 1216 preferably is positioned in the shell 41, so that base portion 691 is towards the proximal part of shell 41.Each lower limb 692 wherein forms a part that cuts or opening 694.These cut part 694 and allow inserter pin 31 by extending and providing one to make lower limb 692 cross one another mechanisms therebetween.The distal portions of each lower limb 692 is inwardly setovered and is formed one 690.Stake 690 is fit to and is formed on the brake component 26 that sheathed catheter saves on 24 inside and engages.When inserter pin 31 extends through the far-end of pin cover 40 and enters sheathed catheter when saving 24, inserter pin 31 also extends through the part 694 that cuts.This promotes lower limb 692 outwards towards sheathed catheter joint 24, so stake 690 engage brake parts 26.Being connected of this maintenance pin cover 40 and sheathed catheter joint 24.In case inserter pin 31 pulls to the nearside that cuts part 694, all lower limbs turn back to freely then that it is inside, not offset, the position of non-clamping, and its king-pile 690 is engage brake part 26 no longer.Therefore spring clip 1216 is flexible reaches and the engaging or disengagement of sheathed catheter joint 24.

Use a tethers 50 together with spring clip 1216 moving with the unwanted proximal that stops inserter pin 31.Perhaps, the proximal wall 691 of spring clip 1216 can form the retention plate shown in Figure 37 A.Therefore, inserter pin 31 can move with the unwanted distal that stops inserter pin 31 with 38 formation of diameter amplifier section and with above-mentioned mode and retention plate cooperation.

As mentioned above, the structure of the part of the spring clip that engages with sheathed catheter joint 24 and brake component 26 in all the foregoing descriptions can have various structures.For example, the finger-type thing that extends radially inwardly of the form and of brake component 26 desirable grooves can be arranged on spring clip and brake component 26 engaging portion.Referring to Figure 62.Perhaps, the form of brake component 26 desirable posts, it can be rectangle or other geometry, and can be the hole of opening wide terminal, can be formed on the part of the spring clip that engages with brake component 26.Referring to Figure 63.In addition, with bias arm that inserter pin 31 engages on the structure in hole can be the terminal of opening wide shown in Figure 64 and 65.

Figure 66 to 69 shows second embodiment that pin cover 40 is connected to the spring clip 1202 on the sheathed catheter joint 24.In the present embodiment, spring clip 1202 forms and retention plate shown in Figure 37 1100 isolating thin slices.Spring clip 1202 forms with the gripper-arm 252 of spring arm 251 and a pair of outside biasing.Spring arm 251 is positioned in the shell 41, so that the U-shaped lower limb is on the longitudinal axis of inserter pin 31.Preferably, the enclosure portion of U-shaped orientation is towards the top of shell.Yet, should be appreciated that any rotation direction that spring arm 251 can be in same plane, this plane be as and the concentric circle of the longitudinal axis of inserter pin 31.The longitudinal axis that each gripper-arm 252 is roughly parallel to inserter pin 31 extends.Certainly, should be appreciated that and only need use a gripper-arm 252.One bias arm 253 extends from every end of spring arm 251.Bias arm 253 is approximately perpendicular to the longitudinal axis of spring arm 251 and inserter pin 31.Each bias arm 253 wherein forms a hole 254 and extends through to allow inserter pin 31.Each gripper-arm 252 forms a hole 255 near its far-end.Hole 255 brake components suitable and on the near-end that is formed on sheathed catheter joint 24 engage.When the far-end that extends through pin cover 40 when inserter pin 31 entered sheathed catheter and saves 24, inserter pin 31 also extended through hole 254.This draws two bias arms 253 together over to one's side and therefore spurs gripper-arm 252 inwardly towards sheathed catheter joint 24, so hole 255 engage brake parts 26.This keeps being connected of pin cover 40 and sheathed catheter joint 24.In case inserter pin 31 is moved the nearside of bias arm 253 to, spring arm 251 turns back to the position of its not offset non-clamping, and wherein gripper-arm 252 discharges from sheathed catheter joint 24, like this hole 255 engage brake part 26 no longer.Certainly, as mentioned above, the structure of the far-end of gripper-arm 252 and brake component 26 can change.For example, brake component 26 can be rectangle or the geometric form with other.Perhaps, brake component 26 can be a groove, and a finger-type thing that extends radially inwardly can be arranged on the far-end of gripper-arm 252 with engage brake part 26 mechanically.The operation of retention plate 1100 is identical with the embodiment of above-mentioned Figure 37.

Figure 70 to 73 shows one the 7th embodiment of the spring clip 1217 that has transverse stop, in case the sharp distal 32 of inserter pin 31 is closely laterally removed inserting needle cover 40, transverse stop stops the unwanted distal motion of inserter pin 31.In the present embodiment, need be at the diameter amplifier section 38 on the inserter pin 31.Replace, spring clip 1217 comprises a transverse stop 796, thereby the sharp distal 32 that it engages inserter pin 31 stops the unwanted distal of inserter pin 31 to be moved.When inserter pin 31 extends through pin cover 40, like this, sharp distal 32 is positioned at the distally of distal openings 45, and inserter pin 31 also extends through hole 794.This draws bias arm 798 together over to one's side, and therefore spurs gripper-arm 792 near sheathed catheter joint 24.In case sharp distal 32 closely laterally moves on to after the hole 794, spring arm 791 moves on to its position not offset, non-clamping, and like this, transverse stop 796 is positioned at before the sharp distal 32.This has stoped any unwanted distal motion thereafter of inserter pin.Certainly, bias arm 798 can form with disclosed interlocking fingers in the embodiment of Figure 51 to 53.

Use tethers 50 that pin cover 40 is connected to needle guard joint 34, can stop inserter pin 31 moving with respect to the unwanted proximal of pin cover 40.As mentioned above, tethers 50 desirable multiple different forms, a line for example, a pleating element, a sleeve member or an a plurality of telescopic element around inserter pin 31 around inserter pin 31.

Figure 74 and 75 shows one the 8th embodiment of the spring clip 1218 that has a transverse stop, and it connects pin cover 40 and sheathed catheter joint 24, in sharp distal 32 is protected in pin cover 40.In the present embodiment, spring clip 1218 comprises that one is connected the gripper-arm 892 on the pin cover 40 pivotly.Gripper-arm 892 comprises that one is used for the finger-type thing 899 of the bead 44 of mechanical engagement sheathed catheter joint 24.In the 8th embodiment of spring clip 1218, use one has the sheet spring of the transverse stop 896 that engages with the sharp distal 32 of inserter pin 31, stops the unwanted distal motion of inserter pin 31.In the position shown in Figure 74, the engaging of the axle of the end by transverse stop 896 and inserter pin 31, transverse stop 896 remains on its outside position.This makes spring clip 1218 remain on the position of clamping.When 31 withdrawals of inserter pin, transverse stop 896 no longer is subjected to the constraint of the axle of inserter pin 31, therefore moves inward.In this position, transverse stop 896 is positioned at the distally of sharp distal 32, and therefore inserter pin 31 is locked in the pin cover 40.Because transverse stop 896 no longer remains on this position with gripper-arm 892, so its rotatable disengagement save 24 engage with sheathed catheter.Referring to Figure 75.Therefore, sheathed catheter joint 24 can be removed from pin cover 40.Certainly, should be appreciated that the spring clip 1218 of present embodiment also can use together with disclosed spring among Figure 19 to 21.Desired is, a mechanism, and it changes gripper-arm 892 to advance and produce this position with respect to sheathed catheter joint 24.

Figure 76 and 77 shows another embodiment of spring clip 799, and this clip is connected to sheathed catheter joint 24 with pin cover 40, in sharp distal 32 is protected in pin cover 40.Being used for stoping the locking piece of inserter pin 31 unwanted distal motion can be the embodiment shown in Figure 19 to 21.When the sharp distal 32 of inserter pin 31 was positioned at the distally of far-end of pin cover 40, lock legs 730 contacts also were offset to inserter pin 31, and the spring clip 799 that is used as a hook engages the bead 44 of sheathed catheters joint 24.Referring to Figure 76.Along with inserter pin 31 is closely laterally recalled inserting needle cover 40, lock legs 730 is striden on the surface that stands in inserter pin 31.Lock legs 730 can comprise proximad or the contact pin 738 in distally on one day, and its contact inserter pin 31 will be reducing to minimum in the drag force on the inserter pin 31.In case the sharp distal 32 of inserter pin 31 moves on to the nearside of lock legs 730, sheet spring 700 turns back to that it is not offset, position promptly that activate, non-clamping, and opening 735 is roughly aimed at the longitudinal axis of inserter pin 31 like this.In the present embodiment, the bead 44 that spring clip 799 is not rejoined sheathed catheter joint 24, like this, conduit can be thrown off from pin cover 40.Referring to Figure 77.If inserter pin 31 after this with respect to pin cover 40 distally to moving, then the sharp distal 32 of inserter pin 31 extends through opening 735, up to diameter amplifier section 38 coupling openings 735.Therefore stoped the unwanted distal motion of inserter pin 31, like this, sharp distal 32 can not be exposed outside pin cover 40 once more.

Lock legs 730 can have a funnel-shaped structure 736 near opening 735 places.This funnel-shaped structure 736 is as a guide of inserter pin 31, to guarantee: if inserter pin 31 distad moves after it recalls pin cover 40, the inserter pin is by opening 735.Funnel-shaped structure 736 can be configured to like this: the shape complementarity that moves back the distal portions 38b that dials of the diameter amplifier section 38 shown in it and Fig. 3 C.Perhaps, lock legs 730 can replace with a transverse stop structure, and is for example such shown in Figure 74 and 75.

For conduit 21 is put into patient's blood vessel, the clinician longitudinally aligns inserter pin 31 and conduit 21 basically with target blood.In venipuncture procedure, the inclined-plane of sharp distal 32 should be basically towards the direction that deviates from skin surface.The clinician inserts skins with a little angle with inserter pin 31 and conduit 21, and preferably angle is approximately less than 35 °, like this, and sharp distal 32 target approach blood vessels.The clinician preferably observes the reflective of blood in the reflector cavity of needle guard joint 34 then.

After confirming that inserter pin 31 and conduit 21 have inserted target blood, the clinician is along inserter pin 31 position in distally propulsion bulb 21 intravasations axially.In some technology, before conduit 21 was advanced to position in the blood vessel fully, inserter pin 31 can partly be recalled into conduit 21.After conduit 21 was suitably located, the clinician was put a finger on the skin above the patient's blood vessel from her another hands, greatly about conduit 21 far-ends top.Be placed on the patient skin and to skin by the finger with her and apply enough pressure, the clinician is inaccessible basically thus or reduce blood flow by conduit 21 at least on the minimum degree.The clinician saves 34 by nearside to mobile needle guard then, extracts inserter pin 31 fully out from conduit 21.This motion makes inserter pin 31 closely laterally move into pin cover 40.

Among all embodiment of spring clip disclosed herein, the spring clip of one of them embodiment is used for connecting pin cover 40 and sheathed catheter joint 24, sharp distal 32 up to inserter pin 31 is recalled inserting needle cover 40, in this near edgewise motor process of inserter pin 31, pin cover 40 still engages with sheathed catheter joint 24.In case the sharp distal 32 of inserter pin 31 is removed inserting needle cover 40, locking piece engages inserter pin 31 is walked out the far-end of pin cover 40 with the sharp distal 32 that stops inserter pin 31 unwanted distal motion like this, and pin cover 40 can save 24 with sheathed catheter and break away from.Inserter pin 31 and pin cover 40 are after sheathed catheter joint 24 is removed, and the clinician then can be with a liquid transporting apparatus, a PRN, and other blood monitoring arrangement of a sealing end cap or some is connected on the sheathed catheter joint 24, and the treatment planned of beginning.Inserter pin 31 and pin cover 40 can be set book according to the disposal of equipment then and remove.

This shows; the assembly of a conduit that has a pin cover provided by the invention and inserter pin is compact, simple and wieldy; do not need special device and technology to operate; as long as the inserter pin is recalled from conduit; just automatically protect the sharp distal of inserter pin; and the pin cover still is connected on the conduit, covers the sharp distal of inserter pin up to the pin cover.

Claims

1. the assembly of a conduit and inserter pin comprises:

One has the conduit of a near-end and a far-end;

The one sheathed catheter joint that is communicated with catheter fluid, it has a near-end and a far-end that is connected with catheter proximal end;

One is arranged on the inserter pin in the conduit, and it has a near-end and a far-end, and one from the axis of near-end to remote extension; And

One has the pin cover of a proximal part and a distal portions, and it comprises an elastic clip, and it is adapted at perpendicular to crooked between an offset position in the plane of inserter needle axis and the not offset position;

Wherein, at offset position, clip engages with the sheathed catheter joint, and under not offset situation, clip and sheathed catheter joint are thrown off; And

Wherein, when the end of inserter pin when the distal portions of pin cover extends, clip remains on a side of inserter pin, its bending enters an offset position thus, when the sharp distal of inserter pin was recalled the inserting needle cover, clip was bent to the not offset position of throwing off with the sheathed catheter joint.

2. the assembly of conduit as claimed in claim 1 and inserter pin is characterized in that, clip comprises a spring arm and the gripper-arm of extending from spring arm.

3. the assembly of conduit as claimed in claim 2 and inserter pin is characterized in that a transverse stop is fixed on the spring arm, and when clip broke away from the sheathed catheter joint, the near-end of its constraint pin cover moved.

4. the assembly of conduit as claimed in claim 2 and inserter pin is characterized in that, gripper-arm comprises a finger-type thing thereon, and when the inserter pin contact clip period of the day from 11 p.m. to 1 a.m, the finger-type thing mechanically engages the sheathed catheter joint, and the sheathed catheter joint is remained on the pin cover.

5. the assembly of conduit as claimed in claim 4 and inserter pin, it is characterized in that, the finger-type thing has a distal face and a proximal end face, wherein, and when clip is in bias conditions following time, at least a portion of finger-type thing proximal end face engages the sheathed catheter joint, and at least a portion joint pin cover of finger-type thing distal face, and wherein, when clip is in offset position, the distal face of pin cover engage finger is to stop the axially-movable of finger-type thing.

6. the assembly of conduit as claimed in claim 1 and inserter pin is characterized in that, clip comprises that one has the v-shaped structure of pair of leg, and when clip was in its not offset position, this straddled on the longitudinal axis of assembly lower limb.

7. the assembly of conduit as claimed in claim 1 and inserter pin is characterized in that, the pin cover comprises a slope that tilts transverse to the longitudinal axis of assembly, wherein, when clip was bent to not offset position, the part of clip engaged this slope, and the motion of its guiding clip is to throw off with the sheathed catheter joint.