CN210871799U

CN210871799U - Nail bin assembly and medical anastomat comprising same

Info

Publication number: CN210871799U
Application number: CN201921145636.XU
Authority: CN
Inventors: 王文建; 陈望东; 黄斌
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Touchstone International Medical Science Co Ltd; Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-06-30
Anticipated expiration: 2029-07-19

Abstract

The utility model provides a nail storehouse subassembly reaches medical anastomat including it, the nail storehouse subassembly includes: a housing; the supporting piece is provided with a plurality of grooves, and the upper sides of the grooves are provided with openings; the staples comprise connecting parts, the connecting parts are at least partially positioned in the grooves, and the connecting parts protrude above the openings of the grooves; a percussion block; when the anastomat is fired, the firing block pushes the anastomosis nails to extend out of the nail outlet holes for closed forming, and after the anastomosis nails are closed forming, the firing block pushes the connecting part, so that the connecting part moves upwards and is separated from the opening of the groove. By adopting the utility model, in the process of the closed forming of the anastomosis nail, the connecting part of the anastomosis nail is embedded in the groove of the supporting part and can not be separated from the supporting part in advance; after the closed forming of the anastomotic nail is finished, the connecting part of the anastomotic nail is pushed to move upwards by the firing block so as to be conveniently separated from the supporting part.

Description

Nail bin assembly and medical anastomat comprising same

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to nail storehouse subassembly reaches medical anastomat including it.

Background

Digestive tract diseases are one of the high-incidence diseases of human beings, and in the treatment process, a medical anastomat is often used for performing anastomosis on physiological tissues such as the digestive tract and the like instead of manual operation of a doctor. The medical anastomat is a common surgical operation instrument, an axial internal stapling mode is mostly adopted, physiological tissues such as esophagus, stomach and intestinal tract are anastomosed end to end or end to side in an operation, two sections of tissues are contained in the medical anastomat in an inwards converging mode in an anastomosing process, a circular anastomotic stoma is formed on the tissues after the completion of the anastomosis, and a human body channel is rebuilt.

In the prior art, a medical stapler includes a medical stapler body, an operating handle movably connected to the medical stapler body, and a nail anvil assembly engaged with the body. The medical anastomat body part comprises a nail bin assembly and a nail bin assembly frame which are arranged on the far end side, and the nail bin assembly comprises a supporting piece and a plurality of anastomotic nails which are arranged on the supporting piece. During operation, the nail bin assembly and the nail anvil assembly are closed, the operating handle is held, the anastomotic nails can be pushed to move towards tissues, and the tissues are anastomosed through the formation of the anastomotic nails in the nail bin assembly at the nail anvil assembly.

In the prior art, the staples and the supporting pieces are directly connected, and as the staples and the supporting pieces are all metal pieces, a rigid metal-to-metal connection is formed between the staples and the supporting pieces, and the connection has instability and uncertainty. When the stapler is fired and the staples move to the tissue, the staples and the supporting piece are difficult to separate and are clamped, once one staple is clamped, the firing block is prevented from continuing to move to the far end side, and the forming and the separation of other surrounding staples are also influenced, so that the operation is failed. In addition, in the process of firing the stapler, the condition that the staples are separated from the support member in advance without being completely closed and molded may occur, which affects the molding effect of the staples and causes risks such as postoperative fistula.

The utility model discloses in, distal end side and near-end side are for the operator, and the one end that is nearer apart from the operator is near-end side, and the one end far away apart from the operator, the one end that is more close to the operation position promptly is the distal end side. The upper side and the upper side refer to the side closer to the nail outlet hole.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model aims to provide a nail bin assembly and a medical anastomat comprising the same, wherein in the closed forming process of an anastomosis nail, a connecting part of the anastomosis nail is embedded into a groove of a supporting part and cannot be separated from the supporting part in advance; after the closed forming of the anastomotic nail is finished, the connecting part of the anastomotic nail is pushed to move upwards by the firing block so as to be conveniently separated from the supporting part.

The embodiment of the utility model provides a nail storehouse subassembly for medical anastomat, nail storehouse subassembly includes:

the nail extractor comprises a shell, a nail extracting hole and a nail discharging hole, wherein the shell is provided with a plurality of nail discharging holes;

the supporting piece is positioned inside the shell and extends along the axial direction of the anastomat, a plurality of grooves are formed in the supporting piece, and openings are formed in the upper sides of the grooves;

the staples are positioned between the inner wall of the shell and the support piece and comprise connecting parts, the connecting parts are at least partially positioned in the grooves, and the connecting parts protrude above the openings of the grooves;

a percussion block;

when the anastomat is fired, the firing block pushes the anastomosis nails to extend out of the nail outlet holes for closed forming, and after the anastomosis nails are closed forming, the firing block pushes the connecting part, so that the connecting part moves upwards and is separated from the opening of the groove.

Optionally, the side wall of the groove limits the movement of the connecting portion in the axial direction of the stapler, and the inner surface of the groove and the inner wall of the housing hold the connecting portion between the inner wall of the housing and the supporter.

Optionally, the maximum length of the part of the connecting part in the groove along the axial direction of the anastomat is larger than the distance between the openings along the axial direction of the anastomat;

the support piece comprises an elastic part at a position corresponding to the opening, and when the firing block pushes the connecting part to move upwards, the elastic part is pressed by the connecting part to deform, so that the distance between the opening and the anastomat along the axial direction is increased, and the connecting part is separated from the groove through the opening.

Optionally, the connecting portion of the staple is a spherical connecting portion, and the groove is a spherical groove adapted to the connecting portion.

Optionally, the distance between the openings of the grooves is smaller than the diameter of the spherical connecting part.

Optionally, the staple outlet hole includes a first staple hole portion and a second staple hole portion, the first staple hole portion is adapted to the shape of the connecting portion, the first staple hole portion communicates with the second staple hole portion, the first staple hole portion protrudes from one side of the second staple hole portion, and after the staple is closed and formed, the staple is wholly upwards separated from the staple outlet hole.

Optionally, the connecting portion of the staple is a truncated cone connecting portion, the conical surface of the connecting portion faces the support, and the groove is a conical surface groove adapted to the shape of the connecting portion.

Optionally, the firing block includes a staple pushing portion and a separating portion, the separating portion is located on a proximal end side of the staple pushing portion, and when the stapler is fired, the staple pushing portion pushes the staple to be closed and formed, and then the separating portion pushes the connecting portion to move upward to be separated from the opening of the groove.

Optionally, the separation portion comprises a guide surface that slopes upward from the distal side to the proximal side.

The embodiment of the utility model provides a medical anastomat is still provided, including arbitrary any the nail storehouse subassembly.

The utility model provides a nail storehouse subassembly reaches medical anastomat including it has following advantage:

the utility model provides a nail bin assembly for a medical anastomat, in the closed forming process of an anastomosis nail, a connecting part of the anastomosis nail is embedded into a groove of a supporting part, the up-and-down movement of the connecting part of the anastomosis nail is limited by the groove, the anastomosis nail is prevented from being separated from the supporting part in advance, and the closed forming effect of the anastomosis nail is guaranteed; after the closed forming of the anastomotic nail is finished, the connecting part of the anastomotic nail is pushed to move upwards through the firing block to be separated from the groove, so that the anastomotic nail is conveniently separated from the supporting part, and the condition that the anastomotic nail is clamped is avoided.

Drawings

Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of a nail cartridge assembly according to a first embodiment of the present invention;

FIG. 2 is a front view of the cartridge assembly of the first embodiment of the present invention with the housing removed;

FIG. 3 is an enlarged view taken at A in FIG. 2;

fig. 4 is a schematic structural view of a supporting member according to a first embodiment of the present invention;

fig. 5 is a front view of a support member according to a first embodiment of the present invention;

fig. 6 is a schematic structural view of the staple according to the first embodiment of the present invention;

fig. 7 is a schematic structural view of a supporting member according to a second embodiment of the present invention;

fig. 8 is a schematic structural view of a staple according to a second embodiment of the present invention;

fig. 9 is a schematic view of the engagement of the buttress and the staple according to the second embodiment of the present invention.

Reference numerals:

1 casing 3 anastomosis nail

11 distal end 31 foot

12 proximal end 32 connection

13 nail outlet hole 4 percussion block

14 first nail hole part 41 nail pushing part

15 second nail hole part 42 separating part

2 support 43 guide surface

21 groove

22 opening

23 elastic part

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

In order to solve the technical problem in the prior art, the utility model provides a medical anastomat that is used for nail storehouse subassembly of medical anastomat and includes this nail storehouse subassembly. The nail bin assembly comprises a shell, a supporting piece, a plurality of anastomotic nails and a firing block, a plurality of nail outlet holes in one-to-one correspondence with the anastomotic nails are formed in the shell, the supporting piece is located inside the shell and extends in the axial direction of the anastomat, a plurality of grooves in one-to-one correspondence with the anastomotic nails are formed in the supporting piece, and openings are formed in the upper sides of the grooves. The staples are located between the inner wall of the shell and the support, each staple comprises a connecting portion at least partially located in the groove, and each connecting portion protrudes above the opening of the groove.

When the anastomat is fired, the firing block pushes the staple legs of the anastomotic staples to rotate around the connecting parts and extend out of the staple outlet holes for closed forming, the connecting parts are kept in the grooves and cannot be separated from the supporting parts in the closed forming process of the anastomotic staples, and after the anastomotic staples are closed and formed, the firing block pushes the connecting parts to enable the connecting parts to move upwards and to be separated from the openings of the grooves, so that the anastomat is integrally separated from the supporting parts conveniently, and the anastomotic effect of the anastomotic staples on tissues is guaranteed. The utility model also provides a medical anastomat, include the nail storehouse subassembly, the nail storehouse subassembly is located the distal end side of anastomat body, through the structure that adopts this kind of nail storehouse subassembly, can improve the operation effect of anastomat effectively.

The structure of the nail bin assembly of the embodiment of the present invention is described below with reference to fig. 1 to 9, wherein fig. 1 to 6 show the structure of the nail bin assembly of the first embodiment of the present invention, and fig. 7 to 9 show the structure of the support member and the anastomosis nail of the second embodiment of the present invention.

As shown in FIGS. 1-6, in the first embodiment of the present invention, the nail cartridge assembly comprises: the surgical stapler comprises a shell 1, a support 2, staples 3 and a firing block 4 for pushing the staples 3 to be anastomosed. The housing 1 and the support 2 both extend in the axial direction of the stapler. The housing 1 is provided with a plurality of nail ejection holes 13 in sequence from its proximal side 12 to its distal side 11. The support 2 is located inside the housing 1, and the staples 3 are located between the inner wall of the housing 1 and the support 2. In the perspective of fig. 1 and 2, the proximal side of a component refers to the left end side of the component and the distal side of a component refers to the right end side of the component, for example, for the case 1, the proximal side 12 thereof is the left end side of the case 1 and the distal side thereof is the right end side of the case 1.

The supporting part 2 is provided with a plurality of grooves 21 corresponding to the staples 3 one by one, and the upper sides of the grooves 21 are provided with openings 22. One end of the staple 3 is a staple leg 31, the other end of the staple 3 includes a connecting portion 32, the connecting portion 32 is at least partially located in the groove 21 to realize the connection between the staple 3 and the support 2, and the connecting portion 32 protrudes above the opening 22 of the groove 21.

When the stapler is fired, the firing block 4 moves from the proximal end side to the distal end side of the cartridge component, the firing block 4 firstly pushes the staples 3, so that the staple legs 31 of the staples 3 rotate around the connecting parts 32 to extend out of the staple outlet holes 13 for closed molding. The configuration of the proximal-most leg 31 of one staple 3 protruding out of the staple hole 13 for closure is shown in fig. 1 by way of example, and as the firing block 4 is pushed proximally to distally, the staples 3 are sequentially pushed out for closure.

As shown in fig. 2 and 3, after the staples 3 are closed and formed, the firing block 4 further pushes the connecting portion 32, so as to apply an upward pushing force to the connecting portion 32, so that the connecting portion 32 moves upward, i.e., the connecting portion 32 moves in the direction B of fig. 3 to be disengaged from the opening 22 of the recess 21.

Therefore, in this embodiment, during the staple 3 closing molding process, the connecting portion 32 is embedded in the groove 21 of the support 2, and the up-and-down movement of the connecting portion 32 is limited by the groove 21, so as to ensure that the staple 3 is not separated from the support 2 in advance, and ensure the closing molding effect of the staple 3; after the anastomotic nail 3 is closed and formed, the connecting part 32 is pushed by the firing block 4 to move upwards to be separated from the groove 21, so that the condition that the anastomotic nail 3 is clamped is avoided, and the anastomat is more smoothly fired.

Further, in this embodiment, the side wall of the groove 21 restricts the movement of the connecting portion 32 in the axial direction of the stapler, and the inner surface of the groove 21 and the inner wall of the housing 1 hold the connecting portion 32 between the inner wall of the housing 1 and the support member 2. Therefore, in the view of fig. 2, the groove 21 restricts the movement of the connecting portion 32 in the up-down direction, and also restricts the movement of the connecting portion 32 in the left-right direction. The inner wall of the housing 1 and the support member 2 together clamp the connecting portion 32, and the connecting portion 32 is restricted from moving outward in a direction perpendicular to the support member 2 and coming out of the groove 21. Therefore, under the action of the groove 21 and the housing 1, the position stability of the connection portion 3 in the groove 21 when the staples 3 are not completely closed can be maintained.

As shown in fig. 2 and 3, the firing block 4 includes a staple pushing portion 31 and a separating portion 42, the staple pushing portion 31 is used for pushing the staples 3 to be closed and formed, and the separating portion 42 is used for pushing the connecting portion 42 to be pulled out from the recess 21. The separation portion 42 is located on the proximal end side of the staple pushing portion 31 so that the staple pushing portion 31 comes into contact with the staples 3 before the separation portion 42. Therefore, when the stapler is fired, the staple pushing portion 31 first contacts the staple 3 and pushes the legs 31 of the staple 3 to protrude from the staple outlet holes 13 and to be closed, and after the staple 3 is completely closed, the separating portion 42 contacts the connecting portion 32 and pushes the connecting portion 32 to move upward and to be separated from the opening 22 of the recess 21. Therefore, before the staples 3 are closed, since the separated portions 42 do not contact the connection portions 32 and do not push the connection portions 32 out of the recesses 21, the staples 3 are not separated from the supporting member 2 early.

In this embodiment, in order to better guide the relative movement between the separating portion 42 and the connecting portion 32, the separating portion 42 includes a guide surface 43 inclined upward from the distal end side to the proximal end side, and by the guiding action of the guide surface 43, when the separating portion 42 moves to the distal end side and pushes the connecting portion 32 after the staple 3 is closed, more upward thrust components are provided, the staple 3 is more easily separated from the support 2, and the firing block 4 is prevented from being caught by the staple 3.

In this embodiment, the distance between the openings 22 in the axial direction of the stapler is smaller than the maximum length of the portion of the connecting portion 32 located in the recess 21 in the axial direction of the stapler, thereby limiting the up-and-down movement of the connecting portion 32 in the recess 21.

When the separating portion 42 pushes the connecting portion 32 to move, the connecting portion 32 presses the sidewalls of the opening 22. In order to facilitate the connection part 32 to be separated from the opening 22, the support part 2 includes an elastic part 23 at a position corresponding to the opening 22, and when the separation part 42 pushes the connection part 32 to move upwards, the elastic part 23 is pressed by the connection part 32 to deform, so that the distance between the openings 22 in the axial direction of the stapler is increased, and the connection part 32 passes through the opening 22 to be separated from the groove 21.

As shown in fig. 4 to 6, in this embodiment, the connection portion 32 of the staple 3 is a spherical connection portion, and the recess 21 is a spherical recess adapted to the connection portion 32. The distance S between the openings 22 of the recess 21 is smaller than the diameter of the spherical connection 32. The support 2 includes two elastic portions 23 at positions corresponding to the openings 22, and the two elastic portions are respectively located at two sides of the openings 22. The elastic portion 23 is deformed when pressed by the connection portion 32 so that the interval of the openings 22 increases as the connection portion 32 goes up to the top. When the scheme is adopted, only the groove 21 needs to be formed on the side face of the support piece 2 in a machining mode, when the connecting portion 32 does not receive upward thrust, the connecting portion 32 can be kept in the groove 21 by means of the relation between the distance of the opening 22 and the diameter of the connecting portion 32, other barriers do not need to be arranged at the opening 22, and machining of the support piece 2 is convenient. The supporting member 2 and the opening 22 may be integrally formed medical rubber or plastic.

In this embodiment, the staple outlet hole 13 includes a first staple hole portion 14 and a second staple hole portion 15, the first staple hole portion 14 is adapted to the shape of the connecting portion 32, the first staple hole portion 14 is communicated with the second staple hole portion 15, the first staple hole portion 14 protrudes to one side of the second staple hole portion 15, and the staple is entirely separated upward from the staple outlet hole after the staple is closed and molded. In this embodiment, the first nail hole portion 14 is a circular nail hole adapted to the shape of the connecting portion 32, and the second nail hole portion 15 is a rounded rectangular nail hole, but the present invention is not limited thereto.

Fig. 7 to 9 are schematic structural views of a supporting member and an anastomosis nail according to a second embodiment of the present invention. This embodiment differs from the first embodiment in that: the shapes of the connecting portion 32 and the groove 21 are different from those of the spherical connecting portion and the spherical groove of the first embodiment. In this embodiment, the connection portion 32 of the staple 3 is a truncated cone connection portion, and the conical surface of the connection portion 32 is disposed toward the buttress 2, and the recess 21 is a conical surface recess 21 adapted to the shape of the connection portion 32.

As shown in fig. 9, the front end portion of the connecting portion 32 is located in the groove 21, and in order to ensure the stability of the connecting portion 32 in the up-down direction in the groove 21 when the connecting portion 32 is not subjected to the upward pushing force, the maximum diameter of the portion of the connecting portion 32 located in the groove 21 is larger than the interval of the openings 22 in the axial direction of the stapler. And the two sides of the supporting part 2 corresponding to the opening 22 preferably include two elastic parts 23, when the connecting part 32 is pushed upwards to press the two sides of the opening 22, the elastic parts 23 deform to increase the distance between the openings 22 along the axial direction of the stapler, so that the connecting part 32 can be disengaged from the groove 21.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A staple cartridge assembly for a medical stapler, said staple cartridge assembly comprising:

a percussion block;

2. The staple cartridge assembly of claim 1, wherein a sidewall of said recess limits movement of said link in an axial direction of said stapler, and an inner surface of said recess and an inner wall of said housing retain said link between said inner wall of said housing and said buttress.

3. The staple cartridge assembly of claim 1, wherein a maximum length of a portion of said connecting portion in said recess in an axial direction of said stapler is greater than a spacing of said openings in the axial direction of said stapler.

4. The staple cartridge assembly of claim 3, wherein the support comprises a resilient portion at a position corresponding to the opening, and when the firing block pushes the connecting portion to move upward, the resilient portion is pressed by the connecting portion to deform, so that the distance between the openings in the axial direction of the stapler is increased, and the connecting portion passes through the opening and is disengaged from the groove.

5. The staple cartridge assembly of claim 1, wherein said coupling portion of said staple is a spherical coupling portion and said recess is a spherical recess adapted to said coupling portion.

6. The staple cartridge assembly of claim 5, wherein said recesses have openings spaced less than a diameter of said bulbous connections.

7. The staple cartridge assembly according to claim 1, wherein said staple exit hole comprises a first staple hole portion and a second staple hole portion, said first staple hole portion is adapted to the shape of said connecting portion, said first staple hole portion communicates with said second staple hole portion, and said first staple hole portion protrudes from one side of said second staple hole portion, and said staple exits from said staple exit hole entirely upward after being closed.

8. The staple cartridge assembly of claim 1, wherein the connecting portion of the staple is a frustoconical connecting portion with a conical surface of the connecting portion disposed toward the buttress, and the recess is a conical surface recess adapted to the shape of the connecting portion.

9. The staple cartridge assembly according to claim 1, wherein said firing block comprises a staple pushing portion and a separating portion, said separating portion is located at a proximal end side of said staple pushing portion, and when said stapler is fired, said staple pushing portion pushes said staple to be closed, and then said separating portion pushes said connecting portion to move upward to be separated from an opening of said recess.

10. The staple cartridge assembly of claim 9, wherein said separating portion comprises a guide surface that slopes upward from a distal side to a proximal side.

11. A medical stapler comprising a cartridge assembly according to any one of claims 1 to 10.