CN101137406B

CN101137406B - Method of producing needle shield

Info

Publication number: CN101137406B
Application number: CN2006800075482A
Authority: CN
Inventors: 蒂莫西·厄斯金
Original assignee: Erskine Medical LLC
Current assignee: Erskine Medical LLC
Priority date: 2005-03-07
Filing date: 2006-03-06
Publication date: 2010-11-24
Anticipated expiration: 2026-03-06
Also published as: CN101137404A; CN101137404B; CN101137407B; CN101137407A; ZA200707248B; ZA200707218B; TWI375578B; ZA200707220B; CN101137406A; TW200702006A; ZA200707219B; CN101137405B; CN101137405A

Abstract

Methods of manufacturing a catheter introducer or needle assembly and needle shield are disclosed. A needle shield has a blocking object (preferably a ball) which moves from an non- shielding position to a shielding position. The catheter introducer is made by placing the blocking object into the shield and inserting the proximal end of the needle into the shield while the blocking object is in the shielding position. The catheter introducer is made using extruded polymeric tubes which may have coextruded reinforcing.

Description

Make the method for needle shield

The cross reference of related application

The present invention requires the priority of following provisional application, and these provisional application are incorporated herein by reference:

The 60/659226-Shielding Apparatus for Locking onto a Needle-applying date is on March 7th, 2005;

The 60/659217-Needle shielding Apparatus with Tubular NeedleCover-applying date is on March 7th, 2005;

The 60/659213-Needle Shielding Apparatus with Tether to NeedleHub-applying date is on March 7th, 2005;

The 60/714954-Blood Collection Device with Needle Shield-applying date is JIUYUE in 2005 7 days.

Background technology

The application relates to the medical treatment device that uses syringe needle, for example spinal needles, venous duct introducer, blood collection device and syringe.It comprises that manufacturing is based on the device of syringe needle and the method that is used for the needle shield of this device.

Summary of the invention

The present invention includes the method for making needle assembly.This syringe needle has near-end, sharp distal and longitudinal axis.Needle shield assemblies provides obturator carrier, obturator (preferably bead) and tube chamber, and this tube chamber is coaxial with the longitudinal axis of syringe needle.Tube chamber has near-end and far-end.Obturator can move to non-screening-off position from screening-off position, and in this screening-off position, obturator is the partial occlusion tube chamber at least, and in this non-screening-off position, syringe needle can slide along tube chamber.Obturator places the obturator carrier and is in screening-off position.The near-end of syringe needle is inserted in the far-end of tube chamber, and make the needle shield assemblies motion, like this, syringe needle makes obturator move to non-screening-off position from screening-off position.

Spring is installed on the obturator carrier, and like this, spring is with the longitudinal axis of obturator bias voltage to syringe needle.When device was catheter introducer, conduit was through on the syringe needle.Catheter adapter is stuck on the needle shield assemblies.At least a portion of needle shield assemblies is arranged in catheter adapter inside.Obturator is bead preferably, but also can be non-spherical object, for example roller.

In screening-off position, the obturator carrier preferably makes obturator remain on the position of the longitudinal axis that departs from syringe needle.At least a portion of needle shield assemblies places catheter adapter inside.

Also introduced a kind of method of making catheter introducer.Polymer pipe is extruded and is installed on the needle hub, and like this, it slides with respect to needle hub.Conduit tube component places on the syringe needle.In an also method of the present invention, second polymer pipe is extruded and is fixed on needle hub.First and second polymer pipes are concentric.The step of extruding polymerization property management can be included in reinforcement is provided in the polymer pipe.Polymer pipe and reinforcement can be extruded jointly.

Other method comprises the extruding polymerization property management, needle hub and syringe needle are fixed on the far-end of polymer pipe and with conduit tube component and are arranged on the syringe needle.Polymer pipe has the second substantially parallel polymer pipe, and like this, polymer pipe comprises a plurality of tube chambers.

To introduce these and other feature of the present invention in more detail below.

Description of drawings

Figure 1A, B and C are the cutaway view of the expression embodiment of the invention when being used for catheter introducer;

Fig. 2 is the cutaway view that is passed in the needle shield of deployment (deployed) position;

Fig. 3 is the vertical sectional view that is illustrated in the angle between needle slope and the shielding wall

Fig. 4 is the vertical sectional view of passing catheter introducer, and wherein needle shield is in non-deployed position;

Fig. 5 is the vertical sectional view of passing catheter introducer, and wherein needle shield is in deployed position;

Fig. 6 is the isometric cross-sectional view of passing catheter introducer, and wherein needle shield is in non-deployed position;

Fig. 7 is the isometric cross-sectional view of passing catheter introducer, and wherein needle shield is in deployed position;

Fig. 8 is the exploded view of the parts of needle shield and needle hub;

Fig. 9 is the vertical sectional view of passing catheter introducer, and wherein needle shield is in non-deployed position;

Figure 10 is the vertical sectional view of passing catheter introducer, and wherein needle shield is in deployed position;

Figure 11 is the isometric cross-sectional view of passing catheter introducer, and wherein needle shield is in non-deployed position;

Figure 12 is the isometric cross-sectional view of passing catheter introducer, and wherein needle shield is in deployed position;

Figure 13 is the exploded view of the parts of needle shield and needle hub;

Figure 14 is the isometric view that is used for the extruding polymerization property management of one embodiment of the invention;

Figure 15 is the vertical sectional view of passing catheter introducer, and wherein needle shield is in non-deployed position;

Figure 16 is the vertical sectional view of passing catheter introducer, and wherein needle shield is in deployed position;

Figure 17 is the isometric cross-sectional view of passing catheter introducer, and wherein needle shield is in non-deployed position;

Figure 18 is the isometric cross-sectional view of passing catheter introducer, and wherein needle shield is in deployed position;

Figure 19 is the exploded view of the parts of needle shield and needle hub;

Figure 20 is the isometric view with catheter introducer of needle shield, and wherein, the shielding part housing is made by the polymer pipe of extruding;

Figure 21 is the cutaway view of housing that passes the embodiment of Figure 20;

Figure 22 is the vertical sectional view of housing of the embodiment of Figure 20;

Figure 23 is the vertical sectional view of passing the indicator needle shield, and wherein needle shield is in non-deployed position;

Figure 24 is the vertical sectional view of passing the indicator needle shield, and wherein needle shield is in deployed position;

Figure 25 is the isometric cross-sectional view of indicator needle shield, and wherein needle shield is in non-deployed position;

Figure 26 is the exploded view of the parts of syringe needle screening arrangement;

Figure 27-the 30th is equipped with the isometric view of the wing catheter introducer of needle shield;

Figure 31-the 32nd is equipped with the isometric view of the wing catheter introducer of needle shield;

Figure 33-the 34th is used for the isometric view of the needle shield of Huber syringe needle, and this Huber syringe needle is used for implantable inlet port;

Figure 35 is the isometric view with blood collection device of needle shield;

Figure 36-the 51st, the right-angle view of the optional embodiment of the present invention.

The specific embodiment

To introduce the embodiment of the invention when being used for catheter introducer, syringe or other below based on the device of syringe needle.The scope that it is not intended to limit the invention.

The present invention can be used for various devices based on syringe needle, for example catheter introducer, syringe, Winged needle and Huber syringe needle.Under nearly all situation, the shielding syringe needle comprises needle shield is provided, and guarantees it can not leave the sharp distal of syringe needle or proximal motion and expose sharp distal again.Therefore, the locking mechanism of some types must just prevent that shielding part distad and proximal movement in case shield syringe needle.

In the present invention, prevent the shielding part proximal motion by the assembly among Figure 1A, B and C and Fig. 2.Assembly 1 comprises syringe needle 10, and this syringe needle 10 has longitudinal axis 11, outer surface 12 and sharp distal 15.Needle shield assemblies 90 has interior lumen 93, and this interior lumen 93 is coaxial with syringe needle 10.Needle shield assemblies 90 is expressed as the inside at the catheter adapter of Figure 1A or hub sleeve 23.Shield assembly 90 is made up of first housing 95, and this first housing 95 is covered by medicated cap 100.First housing 95 has the stepped area that reduces diameter 105, and spring 2 is through on this stepped area.First housing 95 has opening 18, and this opening forms the keeper or the carrier 16 (shown in Figure 1A and 4) of bead 3 with first housing 95.Opening 18 passes from outer wall 19 and extends to tube chamber 93.Opening 18 is arranged to like this, and promptly bead 3 can move in this opening, but bead 3 with respect to axis 11 radially, vertically and circumferential movement all be restricted.

In the non-screening-off position of Figure 1A, bead 3 passes the hole 21 in the medicated cap 100 and protrudes.Spring 2 applies power on bead 3, this power has axial component and radially towards the component of axis 11.In non-screening-off position, bead 3 contacts with the outer surface 12 of syringe needle 10.Therefore, the biasing force of spring 2 will make bead 3 towards axis 11 motions.

When shield assembly 90 when syringe needle 10 slides, it is near far-end 15.When the inclined-plane of syringe needle 10 during through bead 3, the biasing force in the spring 2 part is pressed into bead 3 in the tube chamber 93 at least, and it leaves hole 21, and radially moves towards axis 11 in opening 18.Because therefore the geometry of opening 18 works as the inclined-plane through out-of-date, bead 3 lies at least partially in the tube chamber 93.Axis 24 off-axis 11 of bead 3.The radial motion of bead 3 is subjected to the restriction of the roof 20 of spring 2 and medicated cap 100.The axially-movable of bead is subjected to the restriction of the antetheca 22 of opening 18.The distal motion of syringe needle 10 is pressed against bead 3 on the wall 22.When shielding part 90 proximads slips (being that syringe needle 10 distad slides) at this moment, syringe needle 10 will be stopped that this bead 3 part at least is in the tube chamber 15 by bead 3, and the motion of this bead is subjected to the restriction of spring 2 and

wall

20,22.

With reference to figure 3, when the local at least position of stopping up tube chamber 93 that bead 3 moves to it, the wall 20 of medicated cap 100 (tangent) angulation α with bead 3.This angle [alpha] is set to the value less than needle tip 15 smallest bevel angle beta.Among the described here embodiment, the angle between wall 20 and bead 3 is about zero degree.When this angle is too big with respect to angle beta, bead 3 will can not be stuck.

Aforesaid operations is more detailed introduction, will change a little at the remainder (about catheter introducer, syringe and other medical treatment device based on syringe needle) of description.Here three kinds of catheter introducers have been represented.In first kind, the distal motion that needle shield leaves the syringe needle sharp end be subjected between the discontinuous part on needle shield and the introducer syringe needle against restriction.In second kind, needle shield is in the end of tubular member, the distal motion of this needle shield be subjected to and be installed in parts on the needle hub against restriction.In the third, needle shield ties up on the needle hub, thereby prevents that needle shield from leaving the sharp end distal motion of syringe needle.This is used for syringe too.In all cases, all will prevent proximal motion and therefore retract the sharp end of syringe needle by said apparatus with exposed needle.

Introduce the present invention when being used for first kind catheter introducer below, wherein, the distal motion of needle shield assembly is subjected to the restriction of the discontinuous part on syringe needle, for example projection or fold.Below with reference to Fig. 4-8.

The purpose of catheter introducer 5 is by syringe needle puncture human or animal body, forms opening, conduit is inserted this opening neutralization remove syringe needle then.In order to prevent that infectious disease from propagating by acupuncture, the top of syringe needle in case take out just should shield.

By syringe needle 10 health that punctures.This syringe needle 10 has outer surface 12, near-end 15, far-end 20 and tube chamber 22.Far-end 20 has pointed tip or tip 25.Far-end tilts.Be expressed as two inclined-planes among the figure, formed the

surface

30 and 40 on the slope of extending from sharp point 25 along proximal direction.Also can use than two more or less inclined-planes.Near-end 15 is fixed on the needle hub 45.Syringe needle 10 has near enlarged cross section 14 zones that are positioned at the far-end 20.This enlarged cross section can be the form of annular ring, expansion syringe needle 10 diameters, grading ring or discontinuous part, projection or fold on syringe needle.Enlarged cross section can be by being formed on the syringe needle 10 playing pleat, grinding, distortion or deposition materials on the needle surface.In the diameter and the difference between its enlarged cross section very little (about 0.004 inch) of syringe needle 10, and its length has only about 0.03 inch.

Conduit tube component 50 has catheter hub 52, the tube chamber 70 that this catheter hub 52 has near-end 55, far-end 60 and extends between this near-end and far-end.Conduit 65 leaves far-end 60 and distad extends.Syringe needle 10 is in the tube chamber 70 of conduit tube component 50 before in inserting health.In case syringe needle 10 inserts in the patient body with conduit 65, syringe needle 10 is by withdrawing from along the proximal direction pulling.Catheter hub 52 has inner surface 80 and outer surface 82.Inner surface 80 provides circumferential slot 75, and the purpose of this circumferential slot 75 is with suitable introduction.Single recessed portion, indenture, circumferential ridge or projection will play the purpose identical with circumferential slot.

Needle shield assemblies 90 is packed in two matching blocks (i.e. first housing 95 and second housing or medicated cap 100).Needle assembly housing 90 can be assembled in the catheter hub 50.First housing 95 has far-end 97 and near-end 99.Tube chamber 93 extends between near-end and far-end, and this tube chamber 93 is sized to make the housing 95 of winning to endwisely slip on syringe needle 10 and to rotate.Stepped area 105 is from extending towards near-end 99 near far-end 97.This stepped area 105 is swedged zones, and it makes helical spring 110 can be arranged on first housing 95.Spring 110 is the compression spring, and it applies axial force along proximad and distal direction.Also can use the spring of other type, for example reed (seeing Figure 41) or corrugated spring shim (seeing Figure 42).

Towards first housing, 95 far-ends, 97 places (but still in stepped area 105), first housing 95 provides opening 120, and this opening 120 is sized to hold bead 122.Second housing or medicated cap 100 have near-end 130 and far-end 135.Near-end 130 provides opening 140, and this opening 140 is sized to make its diameter less times greater than syringe needle 10, but is slightly smaller than the diameter of area of enlarged cross section 14.Like this, second housing can be axially 15 slides towards far-end 20 along syringe needle from near-end, up to its opening 140 abuts area of enlarged cross section 14, at this moment, its further distal direction slip.When first and

second housings

95 and 100 assemblings, second housing 100 covers the major part of first housing 95, except the far-end 97 of this first housing.Like this, second housing 100 covers spring 110.Second housing 100 provides opening 150, and this opening 150 is sized to make that the part of bead 122 is protruding in the groove 75 by it.

When being in the catheter hub 52 before needle shield assemblies 90 is being disposed, the part of bead 122 is protruded by opening 150, and is in the groove 75.This is locked in needle shield assemblies 90 on the catheter hub 52, make that simultaneously catheter hub 52 can be according to the extent of groove 75 (promptly, no matter this groove is a circumferential slot, still because it is not merely able to carry out finite motion around the whole interior Zhou Yanshen of catheter hub) and with respect to needle shield assemblies 90 rotations.The part of bead 122 also is in the tube chamber 93 of first housing 95, and the outer surface 12 of abuts needle 10 (being the outer wall 12 of bead 122 contact needles 10).Syringe needle 10 and shield assembly 90 can slide relative to one another under very low friction situation and rotate.Bead 122 is subjected to the radially restriction of groove 75 and syringe needle 10.Therefore, needle shield assemblies 90 is locked in the catheter hub 52.Spring 110 axial application of force and on bead 122 along distal direction.And the syringe needle of abut ball 122 10 is constrains ball 122 radially, and prevents that it from leaving groove 75.

In case conduit 65 places in the patient body, syringe needle 10 is pulled (that is to say that needle shield assemblies 90 is towards top 25 motions of syringe needle 10) along proximal direction.When first inclined-

plane

30 and 40 facing to bead 122, when first inclined-plane 40 aligns with bead 122, bead 122 still less is subjected to the radially restriction of syringe needle 10 then, and is pushed by spring 110, it begins distad and radially to move in the opening 120.Like this, bead 122 leaves opening 150 and groove 75, and further radially inwardly enters in the tube chamber 93 of shield assembly 90, and (wall of the opening 150 in second housing 100) pivot rotates around edge 155, and distad slides along the length of opening 120.When syringe needle 10 continued its proximal motion, it no longer radially limited, and bead 122 leaves groove 75 fully.When bead 122 was located such that edge 155 is higher than it, bead 122 as far as possible far leading thread was subjected to the restriction and the partial occlusion tube chamber 93 of the size of opening 120 in entering tube chamber 93.

When inclined-

plane

30 and 40 facing to bead 122 or local during facing to bead 122, device is worked in a similar manner.That is to say that when needle tip 25 process beads 122, syringe needle 10 is constrains ball 122 no longer.Spring 110 is along opening 120 urges ball 122, and like this, bead 122

leaves groove

75, and 155 pivots rotate around the edge.Bead 122 is subjected to the restriction of the size of opening 120 and geometry and prevents to enter tube chamber 93.Like this, bead 122 partial occlusion tube chambers 93.

Tu5 ﹠amp; Represented in 7 in opening 120 and the position of the bead 122 of partial occlusion tube chamber 93.When bead 122 moved to the point of described partial occlusion tube chamber 93, area of enlarged cross section 14 was against the rear aperture 140 of medicated cap 100, and further spurred syringe needle 10 and will make shield assembly 90 leave catheter hub 52 (because bead 122 no longer is in the groove 75).The power that is acted on the bead 122 by groove 75 because proximal direction spurs syringe needle can radially push bead 122 in the tube chamber 93.

The interaction of the area of enlarged cross section 14 on the syringe needle 10 and the rear aperture 140 of second housing 100 will prevent the motion (like this, shield assembly 90 slides off the far-end 20 of syringe needle) of shield assembly distal direction.Prevent shield assembly proximal direction motion (so that exposing needle tip 25) by far-end 20 abut ball 122 that make syringe needle 10.

From area of enlarged cross section 14 to the top 25 distance be arranged to like this, when align with bead 122 in top 25, have enough spaces be used for bead below second housing 100 in opening 120 motions.By the angle that forms with the tangent upper surface 136 of bead 122 and top described identical with reference to figure 3.The far-end 97 of first housing 95 and medicated cap 100 are sized to protruding, and like this, top 25 can not be exposed from the far-end 97 of shielding part 90.Can also use a plurality of beads, these beads place a plurality of openings identical with opening 120 and 150.If like this, the protruding of far-end 97 and medicated cap 100 can reduce, thereby makes that shield assembly 90 is compacter.

After disposing but before syringe needle 10 distal motion, the part of bead 122 is in the tube chamber 93, and its part is pushed against on the distal wall 157 of opening 120 by spring 110.The top of bead 122 be in second housing 100 far-end 135 below.In optional embodiment, expansible spring 110 is sealed the top of opening 120.Therefore, bead 122 radial and axial being limited in the opening 120.When syringe needle 10 distal motion, it is with abut ball 122, and this bead 122 will press the distal wall 157 and the surface 136 of second housing 100.Therefore will prevent syringe needle 10 further distal motion like this, and prevent that needle tip 25 from exposing from shield assembly.

Tube chamber 93 is sized to make syringe needle 10 to be assemblied in its inside relatively closely.Therefore, when syringe needle 10 distal motion (being shielding part 90 proximal motion) and bead 122 abut needle tip 25, syringe needle 10 will can not leave bead 122.Therefore, tube chamber 93 provides the supporting relative with bead 122, so that prevent syringe needle 10 swings, and prevents that top 25 from moving into and thrusts first housing 95.Also help shielding part 90 is through (far-end that is shielding part 90 is through on the near-end of syringe needle) on (threading) syringe needle 10 in the snug fit between tube chamber 93 and the syringe needle 10.Snug fit means that shielding part guides and becomes to make the near-end 15 of syringe needle 10 to enter in the opening 140 in the near-end 130 of medicated cap 100.This is very important, because opening 140 is only big 0.001 inch than the diameter of syringe needle 10 usually.

In optional embodiment, bead 122 enters in the tube chamber 93 fully.The diameter of bead 122 is less times greater than the diameter of tube chamber 93.Then, bead 122 is subjected to the axial restraint of tube chamber 93 and syringe needle 10.At this moment, the size of tube chamber 93 also is arranged to provide and bead 122 supportings relative, that be used for syringe needle 10, thereby prevents syringe needle swing and prevent that top 25 from thrusting first housing 95.

In order to leave groove 75, the distance of bead 122 motions equals it adds medicated cap 100 from the amount of opening 150 protrusions wall thickness (about 0.003 " to 0.005 ") at least.When shielding part was disposed, the amount that bead 122 stretches in the tube chamber 93 was approximately equal to this distance.This makes the part of tube chamber 93 block.When the syringe needle that uses than small dimension, need bigger bead, so that enough occludes lumen 93, thereby prevent needle tip 25 from passing the not obstruction part of tube chamber 93 and stretch out.When using the syringe needle of big specification, bead can littler (that is, when syringe needle had than major diameter, bead can be littler).

Above-mentioned explanation comprises the operation of the needle shield 90 with conduit tube component 50, except the syringe needle function of shielding, also provides to be used for the mechanism that shielding part 90 is locked on the conduit tube component 50 and makes it unblank.This provides attendant advantages, guarantees that promptly shielding part 90 can not remove up to making needle tip 25 conductively-closeds from catheter hub 52.When not needing catheter lock regularly, medicated cap 100 can be closed (promptly not having opening 120), and enlarges so that hold the whole diameter of bead 122 a little.

Introduce below and use the second type catheter introducer of the present invention.In this second type catheter introducer, when syringe needle shielded, pipe covered the whole length of syringe needle, and the further distal motion of restriction needle shield.With reference to figure 9-14.

Thrust health by syringe needle 210, this syringe needle 210 has outer surface 212, near-end 215, far-end 220 and tube chamber 222.Far-end 220 has sharp-pointed tip 225.Far-end tilts, and two inclined-plane-formation is arranged along the

surface

230 and 240 of proximal direction from the slope that sharp-pointed tip 225 stretches out.Also can use than two more or less inclined-planes.Near-end 215 is fixed on the needle hub 245.

Needle hub 245 has the pipe 250 that extends backward, and it is fixed on the near-end 215 of syringe needle 210 from this.Needle hub tube 250 has near-end 254 and far-end 252 (syringe needle 210 is fixed on this far-end 252).Needle hub tube 250 has tube chamber 260, and this tube chamber 260 is coaxial with the tube chamber 220 of syringe needle 210, and like this, fluid can flow in the tube chamber 260 along tube chamber 222.Needle hub tube 250 forms one and coaxial with another pipe 255, and this pipe 255 forms handle, and near-end 258 and far-end 256 are arranged.Pipe 250 is located to be connected at the back 275 of assembly (near-end) with 255.That is to say that 275 places are connected the near-end 254 of syringe needle tube 250 at the back with the near-end 258 of handle tube 255.Needle hub 250 is in open back (porose 270), and this needle hub 250 is equipped with breather plug, allows air to overflow when entering tube chamber 222 and flowing into tube chamber 260 with convenient fluid but does not allow liquid to overflow.Pipe 250 and 255 all transparent (perhaps having transparent part at least), like this, fluid stream can be seen by the user.Pipe 255 has the peripheral outer lips 272 that is positioned at far-end 256 places, these peripheral outer lips 272 approximate near-ends 215 with syringe needle 210 be fixed on the needle hub 245 the zone in line.All flanges 274 in pipe 255 also has, basic and external flange 272 of all flange 274 in line in this.The combination of needle hub tube 250 and handle tube 255 can be thought two concentric cylinders.Between pipe 250 and 255 is the annular space 276 that extends to back 275 from far-end 256.

Conduit tube component 280 has catheter adapter or hub sleeve 282, the tube chamber 290 that this catheter adapter or hub sleeve 282 have near-end 285, far-end 288 and extend between this near-end and far-end.Conduit 286 leaves far-end 288 and distad extends.Syringe needle 210 is in the tube chamber 290 of conduit tube component 280 before in inserting health.In case syringe needle 210 inserts in the patient body with conduit 286, by syringe needle 210 being taken out along proximal direction pulling syringe needle 210.Catheter hub 282 has inner surface 292 and outer surface 291.Inner surface 292 provides circumferential slot 293, the purpose of this circumferential slot 293 as mentioned above, and with suitable introduction.Single recessed portion, indenture, circumferential ridge or projection will play the purpose identical with circumferential slot.

Needle shield assemblies 2110 has near-end 2120, far-end 2115 and the tube chamber from proximal extension to far-end 2112.Tube chamber 2112 is sized to make shield assembly 2110 to endwisely slip and rotation on syringe needle 210 at far-end 2115 places.Shield assembly 2110 comprises two part-first housings 295 and medicated cap 2100.Medicated cap 2100 is in far-end 2115 places, and is assembled to the inside of catheter hub 282.Shielding part 2110 is concentric with pipe 250 and 255.When shielding part was in its non-deployed position, first housing 295 of shielding part 2110 was in the annular space 276 part at least.First housing 295 can front and back slip in axial direction in annular space 276.First housing 295 is also local at least transparent, so that make the user can see fluid stream.The near-end 2120 of shielding part 2110 provides peripheral flange 2117.When shielding part 2110 when distal direction is moved vertically along annular space 276, flange 2117 will be finally against the inner flange 274 of handle tube 255, and will prevent further distal motion.In deployed position, near-end 2121 at far-end 256 places of handle tube 255 against inner flange 274.

First housing 295 has have stepped area 2105 far-end 297 in (swedged zone, it makes helical spring 2111 can be arranged on first housing 295, and medicated cap 2100 will be arranged in above it).Stepped area 2105 can be separated formation with first housing 295, and is installed in above it.Spring 2111 is compression springs, and it applies power vertically along proximad and distal direction.Towards first housing, 295 far-ends, 297 places (but still in stepped area 2105), first housing provides opening 2120, and this opening 2120 is sized to hold bead 2122.

Medicated cap 2100 is a metallic stamping pieces, has near-end 2130 and far-end 2135.When first housing 295 and medicated cap 2100 assemblings, second housing 2100 covers the far-end 297 and the spring 2111 of first housing.Medicated cap 2100 provides opening 2150, and this opening 2150 is sized to make that the part of bead 2122 can be protruding in the groove 293 by it.Medicated cap 2100 is sized to be assemblied in the catheter hub 282.Part first housing 295, next-door neighbour's stepped area 2104 also is assembled in the catheter hub 282.

When needle shield assemblies 2110 was installed on the catheter hub 282 (part that is the medicated cap 2100 and first housing 295 is in the catheter hub 282), before disposing, the part of bead 2122 was protruded by opening 2150, and is in the groove 293.This is locked in needle shield assemblies 2110 on the catheter hub 282, make that simultaneously catheter hub 282 can be according to the extent of groove 293 (promptly, no matter this groove is a circumferential slot, still because it is not merely able to carry out finite motion around the whole interior Zhou Yanshen of catheter hub) and with respect to needle shield assemblies 2110 rotations.The part of bead 2122 also is in the tube chamber 2112 of first shield assembly 2110, and the outer surface 212 of abuts needle 210 (being the outer wall 212 of bead 2122 contact needles 210).Syringe needle 210 and shield assembly 2110 can slide relative to one another under very low friction situation and rotate.Bead 2122 is subjected to the radially restriction of groove 293 and syringe needle 210.Therefore, needle shield assemblies 2110 is locked in the catheter hub 282.Spring 2111 axial application of force and on bead 2122 along distal direction.And the syringe needle of abut ball 2,122 210 is constrains ball 2122 radially, and prevents that it from leaving groove 293.This also is shown in Figure 11.

In case conduit 286 places in the patient body, syringe needle 210 is pulled (that is to say that needle shield assemblies 2110 is towards top 225 motions of syringe needle 210, perhaps needle hub 245 proximads are pulled) along proximal direction.When inclined-

plane

230 and 240 facing to bead 2122, when first inclined-plane 240 aligns with bead 2122, bead 2122 still less is subjected to the radially restriction of syringe needle 10 then, and is pushed by spring 2111, it begins distad and radially to move in the opening 2120.Like this, bead 2122 leaves opening 2150 in the medicated cap 2100 and the groove 293 in the catheter hub 282, and further radially inwardly enter in the tube chamber 2112 of shield assembly 2110, (wall of the opening 2150 in medicated cap 2100) pivot rotates around edge 2155, and distad slides along the length of opening 2120.When second inclined-plane 230 alignd with bead 2122, syringe needle 210 no longer radially limited it, and bead leaves groove 293 fully.When bead 2122 was located such that edge 2155 is higher than it, bead 2122 as far as possible far leading thread was subjected to the restriction and the partial occlusion tube chamber 2112 of the size of opening 2120 in entering tube chamber 1212.

When inclined-

plane

230 and 240 facing to bead 2122 or local during facing to bead 2122, device is worked in mode similar to the above.Spring 2111 is along opening 2120 urges ball 2122, and like this, bead 2122 leaves

groove

293, and 2155 pivots rotate around the edge.Bead 2122 is subjected to the restriction of the size of opening 2120 and geometry and prevents to enter tube chamber 293.Like this, bead 2122 partial occlusion tube chambers 2112.

After bead 2122 moves to the point that makes its partial occlusion tube chamber 2112 (as mentioned above), the flange 2117 of shield assembly 2110 is against the inner flange 274 of pipe 255, and further spur syringe needle 210 and will make shield assembly 2110 leave catheter hub 282, because bead 2122 no longer is in the groove 293.Because the power that is acted on the bead 2122 by groove 293 along proximal direction pulling syringe needle also radially inwardly pushes bead 2122 in the tube chamber 2112.

Interaction by

flange

274 and 2117 prevents that shield assembly is along distal direction move (thereby making shield assembly 2110 finally skid off the far-end 220 of syringe needle).By making syringe needle 210 far-ends 220 abut ball 2122 (this bead 2122 is against the wall 2157 of first housing 295 and the upper inside wall 2136 or the medicated cap 2100 of second housing) prevent shield assembly move (so that exposed needle top 225) along proximal direction.

225 distance is arranged to like this from flange 2117 to needle tip, when align with bead 2122 in top 225, has enough spaces to make bead motion in opening 2120 below medicated cap 2100.Can consider, the setting of angle [alpha] and β (promptly being formed at bead 2122 and the surface angle of contingence and the smallest bevel angle between 2136) as top about as described in Fig. 3.

After the deployment but before syringe needle 210 distal motion, the part of bead 2122 is in the tube chamber 2112, and its part is pushed against on the distal wall 2157 of opening 2120 by spring 2111.The top of bead 2122 be in medicated cap 2100 far-end 2135 upper surface 2136 below.The far-end 299 of first housing 295 and the size of medicated cap also are arranged to protruding, and like this, top 225 can not be exposed from far-end 2115.Also can use a plurality of beads.Previous designs also provides aforementioned conduit lock-in feature.

In a single day shielding part disposes (but before syringe needle 210 distal motion), and the part of bead 2122 just is in the tube chamber 2112, and its part is pushed against on the wall 2157 of opening 2120 by spring 2111.The top of bead 2122 be in medicated cap 2100 far-end 2135 upper surface 2136 below.Opening 2120 can be sealed by spring 2111.Bead 2122 radial and axial being limited in the opening 212.When syringe needle 210 distal motion, it is abut ball 2122, and this bead 2122 will be pressed against on the wall 2136 of the distal wall 2157 of first housing 295 and medicated cap 2100.Like this, syringe needle 210 can not expose from shielding part in the distally.

Tube chamber 2112 provides the antihunting supporting that is used for syringe needle 210, as top about as described in the previous embodiment.Bead motion and the bead size relevant with needle gauge size are also same as described above.That is to say that bigger bead is used for more small dimension size, vice versa.

The tube portion of first housing 295 and shielding part 2110 can be made by extruding polymerization property management 950, (also sees Figure 20-22) as shown in Figure 14.Polymer pipe 950 is relatively thin and flexibility arranged.This (and it extrude make) makes that it is very light and it is simple to make, and compares with harder moulding part, makes its required quantity of material and reduces.For hardness and intensity are provided, polymer pipe can strengthen by the tinsel of extruding jointly 956.Tinsel 956 is expressed as the longitudinal metallic wire that extends along the length of pipe 955.Longitudinal metallic wire also may be selected to be fabric, net, grid or the helix of extruding jointly.

Introduce below and use catheter introducer of the present invention, wherein, the distal motion of needle shield is subjected to being fixed on the restriction of the tether on the needle hub.With reference to figure 15-19.Needle hub 45 has the pipe 50 that extends backward, and it is fixed on the near-end 15 of syringe needle 10 from this pipe.Needle hub tube 50 has near-end 54 and far-end 52 (syringe needle 10 is fixed on this far-end 52).Needle hub tube 50 has tube chamber 60, and this tube chamber 60 is coaxial with the tube chamber 22 of syringe needle 10, and like this, fluid can flow in the tube chamber 60 along tube chamber 22.Needle hub tube 50 forms handle, and the user can catch conduit tube component 5 by this handle, so that syringe needle 10 is inserted in the patient body.

Needle hub 50 is in open back (porose 70), and it is equipped with breather plug, allows air to overflow when entering tube chamber 22 and flowing into tube chamber 60 with convenient fluid but does not allow liquid to overflow.Manage 50 transparent (perhaps having transparent part at least), like this, fluid stream can be seen by the user.Pipe 50 has the peripheral outer lips 72 that is positioned at far-end 52 places, these peripheral outer lips 72 approximate near-ends 15 with syringe needle 10 be fixed on the needle hub 45 the zone in line.

Peripheral flange 72 provides little opening 74, and tether 73 passes this little opening 74.Tether 73 has near-end 77 and far-end 76.Near-end is a T shape.The arm 79 of T shape prevents that tether 73 from overflowing by opening 74 when distal motion.Far-end 76 is fixed on the needle shield assemblies 110 (back will be introduced).Like this, tether 73 prevents that needle shield assemblies from leaving the top 25 of syringe needle 10 along distal direction.Tether 73 can be made by nylon, and is very similar to label holder (this label holder is used for label is fixed on medicated clothing in retail business).Tether 73 can be integrally molded with first housing 95, but must be not like this.

Conduit tube component 80 has catheter hub 82, the tube chamber 90 that this catheter hub 82 has near-end 85, far-end 88 and extends between this near-end and far-end.Conduit 86 leaves far-end 88 and distad extends.Syringe needle 10 is in the tube chamber 90 of conduit tube component 80 before in inserting health.In case syringe needle 10 inserts in the patient body with conduit 86, by syringe needle 210 being taken out along proximal direction pulling syringe needle 210.Catheter hub 82 has inner surface 92 and outer surface 91.Inner surface 92 provides circumferential slot 93, and the purpose of this circumferential slot 93 is with suitable introduction.Single recessed portion, indenture, circumferential ridge or projection will play the purpose identical with circumferential slot.

Needle shield assemblies 110 has near-end 118, far-end 115 and the tube chamber from proximal extension to far-end 112.Tube chamber 112 is sized to make shield assembly 110 to endwisely slip and rotation on syringe needle 10.Shield assembly 110 is included in-first housing 95 and medicated cap 100 in the matching block.Medicated cap 100 is in far-end 115 places, and is assembled to the inside of conduit tube component 80.

First housing 95 has have stepped area 105 far-end 97 in (swedged zone, it makes helical spring 111 can be arranged on first housing 95, and medicated cap 100 will be arranged in above it).Spring 111 is compression springs, and it applies power vertically along proximad and distal direction.Towards first housing, 95 far-ends, 97 places (but still in stepped area 105), first housing provides opening 120, and this opening 120 is sized to hold bead 122.

Medicated cap 100 is a metallic stamping pieces, has near-end 130 and far-end 135.Medicated cap 100 covers the far-end 97 and the spring 111 of first housing.Medicated cap 100 provides opening 150, and this opening 150 is sized to make that the part of bead 122 can be protruding in the groove 93 by it.Medicated cap 100 is sized to be assemblied in the catheter hub 82.Part first housing 95, next-door neighbour's stepped area 104 also is assembled in the catheter hub 82.

When needle shield assemblies 110 was installed on the catheter hub 82 (part that is the medicated cap 100 and first housing 95 is in the catheter hub 82), before disposing, the part of bead 122 was protruded by opening 150, and is in the groove 93.This is locked in needle shield assemblies 110 on the catheter hub 82, make that simultaneously catheter hub 82 can be according to the extent of groove 93 (promptly, no matter this groove is a circumferential slot, still because it is not merely able to carry out finite motion around the whole interior Zhou Yanshen of catheter hub) and with respect to needle shield assemblies 110 rotations.The part of bead 122 also is in the tube chamber 112 of first shield assembly 110, and the outer surface 12 of abuts needle 10 (being the outer wall 12 of bead 122 contact needles 10).Syringe needle 10 and shield assembly 110 can slide relative to one another under very low friction situation and rotate.Bead 122 is subjected to the radially restriction of groove 93 and syringe needle 10.Spring 111 axial application of force and on bead 122 along distal direction.And the syringe needle of abut ball 122 10 is constrains ball 122 radially, and prevents that it from leaving groove 93.

In case conduit 86 places in the patient body, syringe needle 10 is pulled (that is to say that needle shield assemblies 110 is towards top 25 motions of syringe needle 10, perhaps needle hub 45 proximads are pulled) along proximal direction.When first inclined-plane 40 and second inclined-plane 30 facing to bead 122, when first inclined-plane 40 aligns with bead 122, bead 122 still less is subjected to the radially restriction of syringe needle 10 then, and is pushed by spring 111, it begins distad and radially to move in the opening 120.Like this, bead 122 leaves opening 150 in the medicated cap 100 and the groove 93 in the catheter hub 82, and further radially inwardly enter in the tube chamber 112 of shield assembly 110, (distal wall of the opening 150 in medicated cap 100) pivot rotates around edge 155, and distad slides along the length of opening 120.When second inclined-plane 30 alignd with bead 122, syringe needle 10 no longer radially limited it, and bead leaves groove 93 fully.When bead 122 was located such that edge 155 is higher than it, bead 122 will radially enter in the tube chamber 112 as far as possible far, was subjected to the restriction and the partial occlusion tube chamber 112 of the size of opening 120.This as shown in Figure 6.When inclined-plane 30 and 40 not when the bead 122, aforesaid operations is also similar, as top in another embodiment as described in.

When needle hub 45 proximal motion, tether 73 is emitted by opening 74, like this, and arm 79 distal motion.When bead 122 moves to the point that makes its partial occlusion tube chamber 112 (as mentioned above), the arm 79 of tether 73 is against flange 72, and further spurs syringe needle 10 and will make shield assembly 110 leave catheter hub 82, because bead 122 no longer is in the groove 93.The power that is acted on the bead 122 by groove 93 because proximal direction spurs syringe needle also can radially push bead 122 in the tube chamber 112.

Interaction by arm 79 and flange 72 prevents move (like this, shield assembly 110 will finally slide off the far-end of syringe needle) of shield assembly along distal direction.Syringe needle 10 far-ends 20 by abut ball 122 (this bead 122 is against the wall 157 of opening 120) prevent that shield assembly is along proximal direction move (to expose needle tip 25).

25 distance is arranged to like this from tether arm 79 to needle tip, when align with bead 122 in top 25, has enough spaces to make bead motion in opening 120 below medicated cap 100.Relation between angle [alpha] (being formed at the angle of contingence between the upper surface 136 of bead 122 and medicated cap 100 far-ends 135) and the β (minimum needle slope angle) is as described above, also considering provides the supporting relative with bead 122 by tube chamber 112, so that prevent syringe needle 10 swing, and prevent that top 25 from moving into and thrust first housing 95.Relation between bead and needle gauge size also as mentioned above.

As shown in Figure 20, the needle hub 45 in Figure 15-19 illustrated embodiment can be made of hard plastic component 940, and this needle hub 45 has the barb 945 at its near-end 947 places.Barb 945 cooperates with extruding polymerization property management 950, as shown in Figure 22.Polymer pipe 950 is extruded jointly with lower tube 960, and this lower tube 960 forms conduit, and tether 73 extends along this conduit.Polymer pipe 950 is relative with 960 thinner and soft.This is extruded manufacturing with them and makes that together device is extremely light and it is simple to make, and compares with hard molded part, makes its required quantity of material and reduces.For hardness and intensity are provided, polymer pipe can strengthen by tinsel, fabric, silk screen, wire grid lattice or the helix of extruding jointly.This as shown in Figure 14.

Introduce needle shield below and be used for hypodermic syringe (, not having conduit to be through above it) based on the device of syringe needle.With reference to figure 23-26.Syringe and needle assembly 5 are made up of syringe body 502, and this syringe body 502 has convex luer adapter 506, and female needle adapter 508 cooperates with this convex luer adapter 506.Needle adapter 508 has hub sleeve 512, and the near-end 505 of syringe needle 510 glues in this hub sleeve 512.Syringe needle 510 has sharp-pointed far-end 525.

Needle shield assemblies 900 is formed-first housing 905 and second housing or medicated cap 910 by two matching blocks.First housing 905 has near-end 909 and far-end 907.Tube chamber 913 extends between near-end and far-end, and the diameter of this tube chamber 913 is arranged so that first housing 905 can endwisely slip on syringe needle 10.Stepped area 915 is 907 extensions from near-end 909 towards far-end.This is to reduce diameter region, and it makes helical spring 911 can be arranged on first housing 905.Spring 911 is the compression spring, and it applies axial force along proximad and distal direction.Towards far-end 907 places of first housing 905 (but still in stepped area 915), first housing provides opening 920, and this opening 920 is sized to hold bead 922.

Second housing or medicated cap 910 have near-end 930 and far-end 935.Near-end 930 provides opening 937, and this opening 937 is sized to make its diameter less times greater than syringe needle 510.Like this, second housing 910 can be along syringe needle from near-end 505 slides towards far-end 525 vertically.When first and

second housings

905 and 910 assembled, second housing 910 covered the major part of first housing 905, except near-end.Like this, second housing covers spring 911.Second housing 910 provides opening 940, and this opening 940 is sized to make the part of bead 922 to protrude by it.This makes needle shield assemblies 900 very compact.But, second housing 910 can be made for bigger a little or provide bubble, so that hold bead 922, like this, bead 922 is covered fully.

When needle shield assemblies was on the needle hub 512, before disposing, the part of bead 922 was protruded by opening 940.The part of bead 922 also is in the tube chamber 913 of first housing 905, and the outer surface 522 of abuts needle 510 (being the outer wall 522 of bead 922 contact needles 510).Shield assembly 900 can the 510 distal direction slip from this position along syringe needle under very low friction situation.Bead 922 is subjected to the radially restriction of the diameter of opening 940, and this opening 940 is sized to make bead 922 and not leave shielding part 900 by opening 940 effusions.Bead 922 also is subjected to the radially restriction of syringe needle 510 on other direction.Spring 911 applies axial force along distal direction on bead 922.

Tether or band 800 are installed on the near-end 909 of first housing 905.It is preferably made in molded identical with first housing 905, but must be so.Tether 800 have far-end 802 (being installed on the near-end 909 of first housing 905) and near-end 804 (this near-end 804 from shielding part 900 backward and stretch out).At near-end 804 place's jugs 806, this handle 806 can be held by the user.Molded with band 800 like this, but also can be mounted in separate part on the band 800.Tether or band 800 by flexible, semi-rigid material for example nylon make.Any can be crooked but provide the material of some vertical compressive strengths all suitable, as long as it can be exerted all one's strength and be applied on the shielding part 900 by tether 800.

Needle hub 512 is integrally molded with limiter 514.Limiter 514 has track 516, when needle shield 900 when syringe needle 510 distad slides, tether 800 can slide along this track distal direction.Limiter 514 has retainer 518, and when handle 806 arrived retainer 518, this retainer 518 prevented that tether 800 from further moving.Limiter 514 has open channel 520, and this open channel 520 makes tether 800 to be arranged in manufacture process in the track 516, but this open channel 520 prevents that tether 800 is removed at an easy rate.

In case syringe needle 510 has used and will shield, the user catches handle 806 simply and promotes it, and like this, needle shield 900 distad slides along syringe needle 510.When needle shield 900 arrival made that needle tip 525 is passed through the point of beads 922, bead 922 still less was subjected to the radially restriction of syringe needle 510, and by spring 911 pushings, it begins distad and radially to move in the opening 920.Like this, bead 922 leaves opening 940, and further radially inwardly enters in the tube chamber 913 of shield assembly 900, and (this edge 955 is walls of the opening 940 in second housing 910) pivot rotates around edge 955.When needle tip 525 process beads 922, syringe needle 510 is constrains ball 922 no longer.Spring 911 is along opening 920 urges ball 922, and like this, 955 pivots rotate bead 922 around the edge.Bead 922 is subjected to the restriction of the size of opening 920 and geometry and prevents to enter in the tube chamber 913 of first housing 905.Like this, bead 922 partial occlusion tube chambers 913.

When bead 922 moves to the point that makes its partial occlusion tube chamber 913, handle 806 contact retainers 518, thus prevent from further to promote handle 806 and therefore promote tether 800.By retainer 518 and handle 806 against preventing that shield assembly 900 is along distal direction move (shield assembly 900 will slide off syringe needle far-end 525) like this.Prevent shield assembly proximal direction motion (to expose needle tip 525) by syringe needle 510 far-ends 525 abut ball 922.

Compare with the length of first housing 905, the length of tether 800 (to the top 525) is arranged to have when align with bead 922 in top 525 enough spaces to be used for making bead to enter tube chamber 913 in the part at least.When be chosen in bead 922 and needle shield 900 parts (this part is just at the radial outside of bead 922, and when shielding part is disposed bead 922 against this part) between angle the time, consider equally with above-mentioned catheter introducer.The near-end 909 of first housing 905 is sized to protruding, and like this, can not be from the distally 907 expose on top 525.

When shielding part 900 was disposed, the part of bead 922 was in the tube chamber 913, and its part be in second housing 910 far-end 935 below, this second housing 910 radially limits it.When shield assembly 900 proximal motion, bead 922 is abut needle tip 525, and presses the distally and the upper inside walls of second housing 910.Therefore will prevent the further proximal motion of shield assembly like this and prevent that needle tip 25 from exposing.

Tube chamber 913 is sized to make syringe needle 510 to be assembled to relatively closely in the tube chamber 913.Like this, when needle shield 900 is moved proximally into deployed position, and during bead 922 abut needle tip 525, syringe needle 510 will can not leave bead 922.Like this, tube chamber 913 provides the supporting relative with bead 922, so that prevent syringe needle 510 swings, and prevents that top 525 from moving into and makes it thrust first housing 905.

In optional embodiment, bead 922 enters tube chamber 913 fully.The diameter of bead 922 is less times greater than tube chamber 913.At this moment, the size of tube chamber 913 also is arranged to provide and bead 922 supportings relative, that be used for syringe needle 910, thereby prevents syringe needle swing and prevent that top 525 from thrusting first housing 905.

Figure 27 and 28 has represented that the present invention is used for Winged needle.In this embodiment, shield assembly 6110 (its type as with reference to figure 9-13 as described in) is installed on the sheath 600.Sheath 600 has slit 603, and this slit makes sheath to slide on wing plate 602 and pipe 606.Slit 603 backs 604 against wing plate 602 will prevent shield assembly 6110 distal motion.

Figure 29 and 30 has represented another Winged needle purposes.In this purposes, needle assembly 7110 (its type also as with reference to figure 9-13 as described in) provides wing plate 702.Needle hub 45 extruding between the quilt of finger is so that discharge it from body tube 704.Flange on the pipe 700 is resisted against the axle collar at 706 places, so that prevent needle hub 45 further proximal motion, disposes needle shield assemblies at this point, thereby prevents top 25 distal motion.

In Figure 31 and 32, represented another Winged needle of the present invention (being with or without conduit).In this embodiment, needle hub 845 is installed on first and second wing plates 802 and 804.

Wing plate

802 and 804 surrounding tubes 806 are

arranged.Wing plate

802 and 804 each has projection 812,814 and 808,810, and they are as hinge, so that make

wing plate

802 and 804 carry out some rotations around pipe 806.Projection 808 is installed at near-end 8120 places or is resisted against on the needle assembly 8110, and provides than the short tube chamber, and like this, projection 808 can be slided vertically along syringe needle 10, so wing plate 804 can slide vertically along syringe needle 10.Projection 810 also has tube chamber, and this tube chamber can make it slide vertically along pipe 806.The motion of wing plate 804 is limited between the

projection

812 and 814 of wing plate 802.

Move to its screening-off position (as mentioned above) when bead, thereby when preventing shield assembly 8110 proximal motion, the projection 810 of wing plate 804 is against the projection 812 of wing plate 802, thereby prevents wing plate 804 distal motion, and therefore prevents shield assembly 8110 distal motion.

Represented Huber syringe needle of the present invention among Figure 33 and 34.In this embodiment, needle hub 1045 has roughly L shaped, and tether 1075 is roughly parallel to syringe needle 1010, and difference is that it is owing to gravity is somewhat arc.Wing plate 1004 has opening 1002, and needle shield assemblies 10110 (its type is described with reference to figure 16-19) was in this opening 1002 locks in place by bead 10122 before disposing.When needle tip 1025 shielded, bead 10122 made shield assembly to remove from opening 1002.At this moment, tether 1075 is emitted fully, and prevents shield assembly 10110 distal motion.

Figure 35 has represented to comprise the blood collection unit of the shielding part shown in Figure 23-26.Figure 36-48 has represented some optional embodiment.Figure 36 represents that spring 111 is in a side of syringe needle 10, is parallel to needle axis, rather than around syringe needle 10.In Figure 37, spring 111 is a torsionspring, and it provides the twisting resistance around the axis of syringe needle 10.This applies peripheral force on bead 122.Open 120 and be arranged so that bead 122 can carry out circumferential movement towards tube chamber 93.Figure 38 has represented that spring 111 is arranged in the outside of first housing 95.Figure 39 has represented that piston 101 places between spring 111 and the bead 122.In Figure 40, piston 101 is for placing the form of the medicated cap between spring 111 and the bead 122.In this embodiment, spring 111 and can't help medicated cap 100 sealing.

Figure 41 has represented the spring 111 of flap form, and this spring 111 is integral with medicated cap 100.Spring 111 can be and medicated cap 100 separated components perhaps can form with medicated cap 100.Figure 42 has represented to become the spring 111 of insertion waves shim form, and it is enclosed within on the syringe needle 10.

Although sphere is the preferred selection of bead 122, the preferred spheres shaped object is also unnecessary.In the embodiment of Figure 43, roller 102 replaces bead 122.

In Figure 44, groove 75 is lined with metal, so that higher pullout forces is provided, and reduces the undercutting in the conduit 52, thus easier molded catheter hub 52.In this embodiment, metal lining 750 is extensions of metal wedge shape 751, and it makes conduit 86 be fixed on needle hub.Metal lining 750 certainly is independent ring or local ring.

Bead 122 can be enclosed in the medicated cap 100, shown in Figure 45-47.At this moment, bead 122 does not provide the locking with catheter hub.In embodiment shown in Figure 47, medicated cap 100 is sealed by flexible metal or plastic surface layer 105, and this top layer 105 covers opening 150, and allows bead 122 motions, and like this, it can be unblanked from catheter hub 52.This structure can replace by enough projection or circumferential projection, neck latching segment or conduits that is formed by hard metal.

In the embodiment of Figure 48, bead 122 places on the piston 800, this piston 800 abuts needle 10 when non-deployed position.When shielding part was disposed, piston 800 was with bead 122 motions.The size of piston 800 changes according to the specification of syringe needle.Like this, this embodiment makes the bead of a size can be used in various needle sizes.

In the embodiment of Figure 49-51, above-mentioned shield assembly is used for Y shape catheter introducer, and wherein, syringe needle 10 is pulled by barrier film 6000.

Although by the agency of and represented needle shield assemblies, their parts and their application on the differing needles head unit, these explanations are not limited to basic scope of invention.It should be apparent to those skilled in the art that a lot of variations and change.Therefore, needle shield assemblies that constitutes according to the principle of the invention and their parts can be to implement with described especially different mode here.The present invention also limits in accessory claim.

Claims

1. method of making needle assembly may further comprise the steps:

Syringe needle is provided, and this syringe needle has near-end, sharp distal and longitudinal axis;

Needle shield assemblies is provided, this needle shield assemblies comprises: obturator carrier, obturator and tube chamber, this tube chamber is coaxial with the longitudinal axis of syringe needle, tube chamber has near-end and far-end, and wherein, obturator can move to non-screening-off position from screening-off position, in this screening-off position, obturator is the partial occlusion tube chamber at least, and in this non-screening-off position, syringe needle can slide along tube chamber;

Obturator is placed the obturator carrier and is in screening-off position;

The near-end of syringe needle is inserted in the far-end of tube chamber; And

Make the needle shield assemblies motion, like this, syringe needle makes obturator move to non-screening-off position from screening-off position.

2. method according to claim 1, further comprising the steps of: spring is installed in step on the obturator carrier, and like this, spring is with the longitudinal axis of obturator bias voltage to syringe needle.

3. method according to claim 1, further comprising the steps of: that conduit is through on the syringe needle.

4. method according to claim 1, further comprising the steps of: that catheter adapter is stuck on the needle shield assemblies.

5. method according to claim 1, wherein: obturator is a bead.

6. method according to claim 1, wherein: obturator is a roller.

7. method according to claim 1, wherein: in screening-off position, the position that the obturator carrier remains on obturator to depart from the longitudinal axis of syringe needle.

8. method according to claim 2, wherein: spring is installed in step on the obturator carrier comprises spring is through step on the obturator carrier.

9. method according to claim 3, further comprising the steps of: as to make at least a portion of needle shield assemblies place catheter adapter inside.

10. method according to claim 3, further comprising the steps of: that catheter adapter is placed on the needle shield assemblies, and needle shield assemblies is locked on the catheter adapter, like this, in screening-off position, obturator makes needle shield assemblies unclamp from catheter adapter, and in non-screening-off position, obturator is locked in catheter adapter on the needle shield assemblies.

11. method according to claim 3 is further comprising the steps of: in screening-off position catheter adapter is placed on the needle shield assemblies, and make needle shield assemblies enter non-screening-off position, thereby catheter adapter is locked on the needle shield assemblies.