CN102138814B

CN102138814B - Surgical stapling instrument

Info

Publication number: CN102138814B
Application number: CN 201010547390
Authority: CN
Inventors: 陈望东; 叶艳平
Original assignee: Touchstone International Medical Science Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2010-11-17
Filing date: 2010-11-17
Publication date: 2013-04-17
Anticipated expiration: 2030-11-17
Also published as: CN102138814A

Abstract

The invention discloses a surgical stapling instrument, which comprises upper and lower jaws closable or openable with each other, wherein a sliding block is arranged in the concave inner part at the near end of the lower jaw; and the remote end of the sliding block is connected with a nail pushing mechanism and a knife pushing mechanism. The surgical stapling instrument is characterized in that: a safety mechanism is arranged between the lower jaw and the sliding block, and has a safety status and a release status; when the safety mechanism is in the safety status, the safety mechanism is connected to a part between the lower jaw and the sliding block and preventing the sliding block from moving along an axis of the lower jaw; and when the safety mechanism is in the release status, the lower jaw separates from the sliding block. The invention has the advantages that: the structure is simple, and the operation is effective; and the invention has good promotional value.

Description

Surgical stapling instrument

Technical field

The present invention relates to a kind of surgical stapling instrument, belong to technical field of medical instruments.

Background technology

Surgical stapling instrument is widely used in being used in the surgical operation wound suture, interior tissue is sewed up and cutting, typical surgical stapling instrument such as US Patent No. 5129570 announcement, have and sew up and two functions of cutting, when carrying out wound suture, with unnecessary cutting tissue.Such surgical stapling instrument generally comprises upper and lower two clamps, and the closed handle that is used for closed upper and lower clamp, be oppositely arranged on up and down nail anvil and the nail bin of clamp front end, be located in the nail bin and ejector pin bar, pushing slice of nail and the cutting knife that can move relative to described nail bin simultaneously, and drive the push button that described pushing slice of nail and cutting knife move.Be disposed with suturing nail in the described nail bin, described pushing slice of nail is pushed suturing nail to nail anvil, and described cutting knife cuts off the tissue between nail bin and nail anvil.

In order to prevent promoting the maloperation that push button produces when clamp up and down is also not closed, the surgical stapling instrument of prior art all can arrange a kind of insurance institution.

US Patent No. has disclosed a kind of insurance institution No. 5129570, arranges one at the middle part of apparatus with the safety block of cutting knife passage and ejector pin bar passage, and shell fragment is set below cutting knife.When apparatus was shown in an open position (being that upper and lower two clamps are not closed), shell fragment was upspring cutting knife, made cutting knife can't pass through the cutting knife passage, played safety effect; After upper and lower two clamp closures of apparatus, nail bin compressing cutting knife top makes cutting knife overcome the elastic force of shell fragment and returns to state with the cutting knife channel alignment, and at this moment insurance is removed, and apparatus can be pulled the trigger use.

US Patent No. has disclosed another kind of insurance institution No. 7055730, arranges one at the middle part of apparatus with the safety block of push broach bar passage and ejector pin bar passage, and this safety block can rotate around apparatus under the torsion spring effect.When apparatus was shown in an open position (being that upper and lower two clamps are not closed), safety block twisted, and made ejector pin bar and push broach bar all can't pass through passage, played safety effect; After upper and lower two clamp closures of apparatus, nail bin compressing safety block make it overcome the elastic force of torsion spring and recover the normal position (be ejector pin bar and push broach bar respectively with its safety block on channel alignment), make ejector pin bar and push broach bar all can pass through safety block, at this moment insurance is removed, and apparatus can be pulled the trigger use.

Summary of the invention

The objective of the invention is to propose a kind of surgical stapling instrument with insurance institution of simple structure.

Purpose of the present invention will be achieved by the following technical programs:

A kind of surgical stapling instrument, comprise: can be mutually the closed or upper and lower clamp opened, the concave inside of described lower clamp is provided with sliding shoe, the far-end of sliding shoe connects ejector pin mechanism and push broach mechanism, be provided with insurance institution between described lower clamp and the sliding shoe, described insurance institution has safety position and release conditions, when described insurance institution is in safety position, described insurance institution is connected between lower clamp and the sliding shoe and limits described sliding shoe along the axial-movement of lower clamp, when described insurance institution was in release conditions, described lower clamp and sliding shoe broke away from.

Further, described insurance institution is shell fragment and the groove of relative set on sliding shoe that is arranged on lower clamp inner surface, and when described shell fragment was in safety position, described shell fragment was stuck in the described groove.

Further, described shell fragment is welded on the inner surface of described lower clamp.

Further, described shell fragment is that the surface of lower clamp is stamped to form.

Further, be the acute angle setting between the inner surface of described shell fragment and lower clamp.

Further, the trigger mechanism of described insurance institution is upper clamp.

Again further, the trigger mechanism of described insurance institution is the sidewall of upper clamp.

Beneficial effect of the present invention is mainly reflected in: simple in structure, operation effectively has good promotional value.

Description of drawings

Fig. 1 is the structural representation of lower clamp, and this moment, upper and lower clamp was not closed.

Fig. 2 is along the cutaway view of A-A among Fig. 1.

Fig. 3 is the structural representation of sliding shoe among Fig. 1, this at present clamp only show shell fragment.

Fig. 4 is the structural representation of upper and lower clamp, and this moment, upper and lower clamp was closed.

Fig. 5 is along the cutaway view of B-B among Fig. 4.

Wherein:

2 times clamp 3 sliding shoes of clamp on 1

11 sidewalls, 21 shell fragments, 31 grooves

The specific embodiment

As Figure 1-3, the invention provides a kind of insurance institution of surgical stapling instrument.Consistent with prior art, described surgery seaming and cutting mechanism comprises cabinet, can be mutually the closed or upper and lower clamp opened, the far-end of upper clamp 1 is provided with nail anvil, the far-end of lower clamp 2 is provided with nail bin.Certainly, the position of clamp can exchange up and down, just the present invention is in order to express clearly so definition.The concave inside of the near-end of lower clamp 2 is provided with sliding shoe 3, and described sliding shoe far-end is provided with ejector pin bar and push broach bar, is respectively applied to pull the trigger suturing nail and cuts and organizes.During use, tissue is placed between nail anvil and the nail bin, involutory upper and lower clamp then, closed and locked pincers make upper and lower clamp grip tissue, then promote the percussion push button, the stitching that can implement to organize and cutting.

Important characteristics of the present invention are: be provided with insurance institution between described lower clamp 2 and the sliding shoe 3, described insurance institution has safety position and release conditions, when described insurance institution was in safety position, described insurance institution was connected between lower clamp 2 and the sliding shoe 3 and limits described sliding shoe 3 along the axial-movement of lower clamp 2; When described insurance institution was in release conditions, described lower clamp 2 broke away from sliding shoe 3, and this moment, sliding shoe can be along the axial-movement of lower clamp 2.

Further, described insurance institution is arranged on the shell fragment 21 of lower clamp 2 inner surfacies and relative set at the groove 31 on sliding shoe 3 surfaces, when described shell fragment 21 is in safety position, when namely being acute angle between the inner surface of this shell fragment 21 and lower clamp 2 and arranging, described shell fragment 21 is arranged in the described groove 31.Owing to so arrange, so that sliding shoe 3 is relative fixing on axial location with lower clamp 2, play safety effect.Described shell fragment 21 is welded on the inner surface of described lower clamp 2, also can be stamped to form for the surface of lower clamp 2.Such design cost is lower, processes also convenient.

Further, the trigger mechanism of described insurance institution is the sidewall of upper clamp.As shown in Figure 4 and Figure 5, after upper and lower two

clamps

1,2 closures, 11 pairs of described shell fragments 21 of the sidewall of upper clamp 1 produce a thrust, make shell fragment 21 distortion and final parallel with the inner surface of described lower clamp.At this moment, this shell fragment 21 namely breaks away from sliding shoe 3, and sliding shoe 3 just can move along the axis of lower clamp.

During operation, tissue is placed on, the working region of lower clamp, it is nail bin, between nail anvil, closed apparatus, the near-end of clamp snaps in the lower clamp near-end on this moment, the shell fragment 21 of extruding insurance institution, make the groove 31 on its disengaging sliding shoe, this moment insurance is removed, and sliding shoe 3 can move forward under the drive of percussion push button, and then promotes the ejector pin bar and the push broach bar moves forward, then nail is pushed out of nail bin and hammers into tissue, cutting knife with tissue dissection, until the nail in the nail bin is all pulled the trigger out, retracts sliding shoe 3 initial position of apparatus near-end at last in 2 parallel sutures.At last, press release-push, open apparatus, operation is finished.

In this preferred embodiment, the trigger mechanism of described insurance institution is the sidewall of upper clamp, can certainly be its other position, for example the bottom.As long as when putting lower clamp closure, can oppress the shell fragment distortion and get final product.

The present invention still has numerous embodiments, and all employing equivalents or equivalent transformation and all technical schemes of forming all drop within protection scope of the present invention.

Claims

1. surgical stapling instrument, comprise: can be mutually closed or open upper, lower clamp, the concave inside of described lower clamp near-end is provided with sliding shoe, the far-end of sliding shoe connects ejector pin mechanism and push broach mechanism, it is characterized in that: be provided with insurance institution between described lower clamp and the sliding shoe, described insurance institution has safety position and release conditions, when described insurance institution is in safety position, described insurance institution is connected between lower clamp and the sliding shoe and limits described sliding shoe along the axial-movement of lower clamp, when described insurance institution was in release conditions, described lower clamp and sliding shoe broke away from.

2. surgical stapling instrument according to claim 1, it is characterized in that: described insurance institution is shell fragment and the groove of relative set on sliding shoe that is arranged on lower clamp inner surface, when described shell fragment was in safety position, described shell fragment was stuck in the described groove.

3. surgical stapling instrument according to claim 2, it is characterized in that: described shell fragment is welded on the inner surface of described lower clamp.

4. surgical stapling instrument according to claim 2, it is characterized in that: described shell fragment is that the surface of lower clamp is stamped to form.

5. surgical stapling instrument according to claim 2 is characterized in that: be the acute angle setting between the inner surface of described shell fragment and lower clamp.

6. surgical stapling instrument according to claim 1, it is characterized in that: the trigger mechanism of described insurance institution is upper clamp.

7. according to claim 1 or 6 described any one surgical stapling instruments, it is characterized in that: the trigger mechanism of described insurance institution is the sidewall of upper clamp.