CN109091183B

CN109091183B - Surgical anastomat device

Info

Publication number: CN109091183B
Application number: CN201810990107.3A
Authority: CN
Inventors: 肖继里; 朱志远; 曾静雯; 潘高峰; 杜晗
Original assignee: Chengdu Ehanri Medical Technology Ltd
Current assignee: Chengdu Ehanri Medical Technology Ltd
Priority date: 2018-08-28
Filing date: 2018-08-28
Publication date: 2023-12-01
Anticipated expiration: 2038-08-28
Also published as: CN109091183A

Abstract

The application discloses an anastomat device for surgery, wherein the anastomat device comprises: a cartridge assembly, a anvil assembly and a drive assembly; the anastomat device further comprises a nail bin gasket and a cutting board gasket, wherein the proximal end of the nail bin gasket is detachably arranged on the nail bin box through a nail bin box hook, the proximal end of the cutting board gasket is fixedly arranged on the cutting board assembly through a cutting board hook, and the nail bin hook and the cutting board hook are elastic energy storage pieces; the drive assembly is provided with a cutting knife which, when moved from the proximal ends of the cartridge and anvil assembly to the distal ends of the cartridge and anvil assembly, cuts and disengages from the cartridge and anvil assembly, respectively. By the mode, the positioning reliability and the release smoothness of the gasket added in the anastomat device can be improved.

Description

Surgical anastomat device

Technical Field

The application relates to the field of medical instruments, in particular to an anastomat device for operation.

Background

The anastomat is a mechanical suturing instrument used for replacing the traditional manual suturing in medicine, and compared with the traditional manual suturing technology, the anastomat has the advantages of small tissue reaction, orderly arrangement of the suturing nails and equal spacing, and effectively avoids the problems of too-loose manual suturing and too-tight ligation; meanwhile, the mechanical suture anastomat is simple and convenient to operate, and the operation time of doctors can be greatly shortened.

With the continuous expansion of the application range of the anastomat, the performance requirement on the anastomat is higher and higher. In order to obtain a good anastomosis effect, a gasket is usually added between the anastomat and the tissue, the added gasket can play a role in cushioning the tissue of a patient, the tensile strength of local tissue is enhanced, the sealing performance of an anastomosis opening is improved, and the occurrence of anastomotic leakage is prevented; the cutting of the anastomotic nail to the tissue can be reduced, and the fracture and the bleeding of an anastomotic orifice are prevented; and the partial pressure of the anastomotic stoma can be balanced, and the occurrence of the anastomotic fistula and the stenosis phenomenon caused by unsmooth local blood circulation due to stress concentration is avoided.

However, the inventor of the present application has found in long-term research and development that the conventional anastomotic device with the attached pad has the problem that the pad in the anastomat cannot be reliably fixed and smoothly released, and is difficult to popularize and apply.

Disclosure of Invention

The application mainly solves the technical problem of providing the surgical anastomat device, which can improve the positioning reliability and the release smoothness of the gasket added in the anastomat device.

In order to solve the technical problems, the application adopts a technical scheme that: provided is a surgical stapler device.

Wherein the anastomosis device comprises:

a cartridge assembly comprising a cartridge base and a cartridge mounted on the cartridge base, wherein a distal end of the cartridge is exposed outside the cartridge base and a proximal end of the cartridge is mounted on the cartridge base;

a anvil assembly having a distal end distal from the cartridge assembly and a proximal end proximal to the proximal end of the cartridge and pivotally coupled to the cartridge base for rotatable disposition on the cartridge assembly;

a drive assembly disposed on the cartridge base proximate the cartridge magazine and the proximal end of the anvil assembly, wherein the drive assembly is movable along the cartridge base from the cartridge magazine and the proximal end of the anvil assembly to the cartridge magazine and the distal end of the anvil assembly to engage the anvil assembly with the cartridge magazine;

the anastomat device further comprises a nail bin gasket and a cutting board gasket, wherein the proximal end of the nail bin gasket is detachably arranged on the nail bin box through a nail bin box hook, the proximal end of the cutting board gasket is fixedly arranged on the cutting board assembly through a cutting board hook, and the nail bin hook and the cutting board hook are elastic energy storage pieces; the drive assembly is provided with a cutting knife which, when moved from the proximal ends of the cartridge and anvil assembly to the distal ends of the cartridge and anvil assembly, cuts and disengages from the cartridge and anvil assembly, respectively.

The beneficial effects of the application are as follows: in comparison with the prior art, the application can effectively fix the proximal ends of the nail bin gasket and the chopping board gasket by respectively hanging the proximal ends of the nail bin gasket and the chopping board gasket on the nail bin box hook and the chopping board hook, wherein the nail bin box hook and the chopping board hook can be elastic energy storage pieces; and because the chopping board gasket and the nail bin gasket are released from the chopping board component and the nail bin box respectively in the movement process of the cutting knife, the release actions of different gaskets are implemented by the cutting knife, the intermediate transmission links are reduced, the linkage release process is simplified, the release structure is simple, the positioning reliability and the release smoothness of the gasket additionally arranged in the anastomat device can be improved, and the popularization and the application of the anastomat device for operation are facilitated.

Drawings

FIG. 1 is an assembly view of a surgical stapler apparatus of the present application;

FIG. 2 is an exploded view of a surgical stapler apparatus of the present application;

FIG. 3 is a schematic view of an embodiment of a hook for a staple cartridge according to the present application in use;

the schematic structure of the cutter 310 shown in fig. 4;

fig. 5 is a schematic structural view of the nail holder 260 shown in fig. 2;

FIG. 6 is a schematic view of the cartridge 120 shown in FIG. 2;

FIG. 7 is a schematic view of the structure of cartridge pad 130 shown in FIG. 2;

FIG. 8 is a schematic view of an embodiment of a cartridge hook 270 of the present application;

FIG. 9 is a schematic view of an embodiment of a use of the cartridge hook 270 of FIG. 8;

FIG. 10 is a schematic view of a second embodiment of a cartridge hook 270 of the present application;

FIG. 11 is a schematic view of an embodiment of a use of the cartridge hook 370 of FIG. 10;

FIG. 12 is a schematic view of a third embodiment of a cartridge hook 270 of the present application;

FIG. 13 is a schematic view of an embodiment of a use of the cartridge hook 270 of FIG. 12;

FIG. 14 is a cross-sectional view of the staple cartridge assembly 100 shown in FIG. 1 along a longitudinal axis of symmetry;

FIG. 15 is an enlarged view of an embodiment of a distal end of the cartridge assembly 100 shown in FIG. 1;

FIG. 16 is a schematic view of an embodiment of the deformation of the cartridge pad 130 shown in FIG. 2;

FIG. 17 is a schematic view of the structure of an embodiment of the anvil body 220 shown in FIG. 2;

FIG. 18 is a schematic view of the structure of one embodiment of the anvil hook 250 shown in FIG. 2;

FIG. 19 is a schematic view of the structure of an embodiment of the anvil spacer 230 shown in FIG. 2;

FIG. 20 is a schematic view of another embodiment of an anvil spacer 230 shown in FIG. 2;

FIG. 21 is a schematic view of the structure of a second embodiment of a anvil hook 250 of the present application;

FIG. 22 is a schematic view of the structure of a third embodiment of a anvil hook 250 of the present application;

FIG. 23 is a schematic view of the assembly of the anvil spacer 230 of FIG. 2 with the anvil body 220;

FIG. 24 is an enlarged partial view of the structure I shown in FIG. 23;

FIG. 25 is a cross-sectional view of the anvil assembly 200 shown in FIG. 1 along a longitudinal symmetry axis;

FIG. 26 is an enlarged view of the distal end of the anvil assembly 200 shown in FIG. 1;

FIG. 27 is an enlarged view of the proximal end of the anvil assembly 200 shown in FIG. 1;

fig. 28 is a schematic view of the deformation of the anvil spacer 230 shown in fig. 2.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, as well as combinations of different embodiments, which are within the scope of the application, can be made by a person of ordinary skill in the art without making any inventive effort based on the embodiments of the application. In addition, in the following description of the present application, the "proximal" refers to the end closer to the user or operator (i.e., surgeon or physician), and the "distal" refers to the end farther from the user, although the above definitions are for convenience only and are not intended to limit the present application.

Referring to fig. 1 and 2, fig. 1 is an assembly view of a surgical stapler apparatus according to an embodiment of the present application, and fig. 2 is an exploded view of the surgical stapler apparatus shown in fig. 1. As shown in fig. 1-2, the surgical stapling apparatus shown in the embodiments of the present application includes a cartridge assembly 100, an anvil assembly 200, and a drive assembly 300. Wherein, in use, the drive assembly 300 squeezes the anvil assembly 200 to form jaws with the cartridge assembly 100 and rotates the anvil assembly 200 closed to clamp tissue to be cut.

Specifically, cartridge assembly 100 includes a cartridge base 110 and a cartridge 120 mounted to cartridge base 110, wherein a distal end of cartridge 120 is exposed outside of cartridge base 110 and a proximal end of cartridge 120 is mounted to cartridge base 110. In addition, the cartridge assembly 100 further includes a cartridge spacer 130, a first resilient mount 140, and a front barrier 150.

The distal end of anvil assembly 200 is distal from cartridge assembly 200 and the proximal end thereof is proximal to the proximal end of cartridge magazine 120 and pivotally connected to cartridge base 110 for rotatable positioning on cartridge assembly 100; in addition, the anvil assembly 200 includes an anvil spacer 230, a second resilient mount 240, an anvil 260, a plurality of staples (not shown) and a plurality of staple pusher plates (not shown).

A drive assembly 300 is disposed on the cartridge base 110 and proximate to the proximal ends of the cartridge magazine 120 and the anvil assembly 200, wherein the drive assembly 300 is movable along the cartridge base 110 from the proximal ends of the cartridge magazine 120 and the anvil assembly 200 to the distal ends of the cartridge magazine 120 and the anvil assembly 200 to engage the anvil assembly 200 with the cartridge magazine 120; in addition, the driving assembly 300 includes a cutter 310, a driving member (not shown) for driving the cutter 310 to move, a cutter stopper 320, and guide shafts 330, wherein the number of the guide shafts 330 may be set to 1-3, and in one embodiment, the number of the guide shafts 330 is 1. In addition, the driving assembly 300 further comprises a cartridge housing 340 detachably connected to the cartridge base 110, wherein the cutter 310 is accommodated in a space defined by the cartridge housing 340 and the cartridge base 110 when the cutter is in an unexcited state (when no anastomosis operation is performed),

as shown in fig. 2, the cartridge assembly 120 is provided with the cartridge spacer 130, the anvil assembly 200 is provided with the anvil spacer 230, the proximal end of the cartridge spacer 130 is detachably mounted on the cartridge assembly 120 by the cartridge hook 270, the proximal end of the anvil spacer 230 is fixedly disposed on the anvil assembly 200 by the anvil hook 230, and the cartridge hook 270 and the anvil hook 250 can be elastic energy storage members, so that the proximal ends of the cartridge spacer 130 and the anvil spacer 230 can be effectively fixed. And the driving assembly 300 is provided with a cutter 310, and the cartridge spacer 230 and the anvil spacer 130 are cut and detached from the cartridge 120 and the anvil assembly 200, respectively, when the cutter 310 moves from the proximal ends of the cartridge 120 and the anvil assembly 200 to the distal ends of the cartridge 120 and the anvil assembly 200.

Further, the cartridge hook 270 and the anvil hook 250 are elastic energy storage members, which can ensure effective fixation and smooth release of the cartridge gasket 130 and the anvil gasket 230. Specifically, the elastic energy storage member may be an independent energy storage spring, and is respectively and fixedly disposed on the anvil body 220 and the nail cartridge 120 by means of welding, pasting or clamping, etc., and of course, the elastic energy storage member may also be a compression executing member integrally formed with the anvil body 220 and the nail cartridge 120 by means of precision casting, etc. In this embodiment, the elastic energy storage member is a separate energy storage spring for simplifying the production process and reducing the cost. Specifically, referring to fig. 3, fig. 3 is a schematic structural diagram of an embodiment of a usage state of the cartridge hook according to the present application, in which the cartridge hook 270 includes a cartridge hook pressing portion 271, a cartridge hook fixing portion 373, and a cartridge hook sleeving portion 272 connecting the cartridge hook pressing portion 271 and the cartridge hook fixing portion 273, and the cartridge hook sleeving portion 272 sleeves the cartridge hook 270 at the proximal end of the cartridge 120. In addition, in the process that the driving assembly 300 moves along the cartridge base 110 from the proximal ends of the cartridge magazine 120 and the anvil assembly 200 to the distal ends of the cartridge magazine 120 and the anvil assembly 200, the direction of the pushing force applied by the driving assembly 300 to the cartridge magazine hanger is directed to the distal end of the cartridge magazine 120, so that the cartridge magazine hanger housing 272 sleeved on the proximal end of the cartridge magazine 120 compresses the proximal end of the cartridge magazine 120, thereby preventing the cartridge magazine hanger 270 from falling off.

Referring to fig. 4, fig. 4 is a schematic diagram illustrating a structure of the cutter 310 shown in fig. 2. As shown in fig. 4, the cutter 310 includes: an upper cutter body 311, a lower cutter body 313 and a cutter edge 312, wherein the cutter edge 312 is disposed between the upper cutter body 311 and the lower cutter body 313, and a front end of the upper cutter body 311 is provided with a protruding portion, and the front end protruding portion of the upper cutter body 311 can apply pressure to a structure in contact therewith.

Referring to fig. 5, fig. 5 is a schematic structural diagram of the nail holder 260 shown in fig. 2. As shown in fig. 5, the nail supporting seat 260 is disposed in the first accommodating space and abuts against the cutter 310 to move along with the movement of the cutter 310; the nail propping seat 260 further comprises a nail propping seat body 261 and a protruding structure 262 arranged on the nail propping seat body 261, wherein the nail propping seat body 261 is in propping connection with the cutting knife 310, the height of the distal end of the protruding structure 262 is smaller than the height of the proximal end of the protruding structure 262, and the distal end of the protruding structure 262 is used for applying pressure to a structure contacted with the protruding structure; further, the length of the protruding structure 262 is 1.2-5 times the length of the nail holder body 261, and in one embodiment, the length of the protruding structure 262 is 1.5 times the length of the nail holder body 261.

Referring to fig. 6, fig. 6 is a schematic view of the cartridge 120 shown in fig. 2. As shown in fig. 6, the cartridge 120 includes a first guide path 122 and a cartridge slot 123; in one embodiment, the cartridge 120 and the cartridge assembly 200 define a first receiving space (not shown), and the first guide path 122 defined in the cartridge 120 is configured for movement of the cutting blade 310 along the first guide path 122 from the proximal end of the cartridge 120 to the distal end thereof.

With continued reference to fig. 2, the cartridge assembly 100 further includes a first resilient securing member 140 disposed within the first receiving space and proximate the distal end of the cartridge pocket 120 for securing the distal end 131 of the cartridge spacer; the first elastic fixing member 140 may be a structure of a shim spring, an elastic sheet, a cylindrical spring, a torsion spring, or the like, which may be decomposed into an independent energy storage portion and a compression portion, and may be made of a metal material, such as copper, aluminum, or the like, or may be made of a plastic material, such as a thermoplastic elastomer TPE, an acryl plastic PMMA, or the like, and the elastic energy storage material is used to make the first elastic fixing member 140, so that the distal end 131 of the cartridge spacer may be reliably fastened, and the distal end 131 of the cartridge spacer may be released at the moving end of the cutter 310 by deforming the first elastic fixing member 140.

In one embodiment, referring to FIG. 7, FIG. 7 is a schematic structural view of cartridge pad 130 shown in FIG. 2. As shown in fig. 7, the cartridge spacer 130 includes a distal end 131 of the cartridge spacer, a cartridge spacer auxiliary cutting line 132, a cartridge fixing hole 133, and a cartridge spacer auxiliary cutting line 134. The distal end 131 of the cartridge spacer is inserted into the first receiving space through the cartridge slot 123 and is fixed by the first elastic fixing member 140; the proximal end of the cartridge spacer 130 is provided with a cartridge fixing hole 133, the proximal end of the cartridge spacer 130 is sleeved between the cartridge hook pressing portion 271 and the cartridge sleeved portion 272 through the cartridge fixing hole 133, and the cartridge hook pressing portion 271 abuts against the proximal end of the cartridge spacer 130 to fix the proximal end of the cartridge spacer 130. The cartridge hook fixing portion 273 has a protrusion 274, and is engaged with a cartridge recess (not shown) on a side of the cartridge 120 remote from the cartridge spacer 130 to fix the cartridge hook 270. The proximal end of the cartridge spacer 130 can be effectively fixed, and the structure is simple and the operation is convenient.

In one embodiment, the stapler device further comprises a cartridge hook mount disposed on the cartridge 120 for cooperating with the cartridge hook 270 sleeved on the proximal end of the cartridge 120 to secure the proximal end of the cartridge spacer 130, wherein the proximal end of the cartridge spacer 130 is disengaged from the cartridge hook 270 to release the proximal end of the cartridge spacer 130 when the cutter 310 is moved to the position corresponding to the cartridge hook mount.

Further, referring to fig. 8 and 9, fig. 8 is a schematic structural view of an embodiment of a cartridge hook 370 according to the present application; fig. 9 is a schematic structural diagram of an embodiment of the use state of the cartridge hook 370 shown in fig. 8, the cartridge hook 270 is provided with a hollow protrusion 121, the cartridge fixing hole 133 at the proximal end of the cartridge spacer 130 is sleeved on the hollow protrusion 121, the fixing portion of the cartridge hook 270 extends into a hollow groove (not labeled) of the hollow protrusion 121 to fix the cartridge hook 270, and the cartridge hook pressing portion 271 presses the proximal end of the cartridge spacer 130. In addition, FIG. 10 is a schematic view of a second embodiment of a cartridge hook 270 of the present application; fig. 11 is a schematic structural diagram of an embodiment of the usage state of the cartridge hook 270 shown in fig. 10, where an arc-shaped mounting end 275 may be further provided at the end of the cartridge hook pressing portion 271, and the cartridge hook pressing portion 271 may be conveniently pulled up and down by moving the arc-shaped mounting end 275, so that the cartridge hook 270 may be conveniently installed and used. Of course, the shape and configuration of the cartridge hook 270 at the mounting end 275 is not limited to the above examples, as long as the functions of the cartridge hook 270 and the mounting end 275 can be achieved.

Further, referring to fig. 12-13, a third embodiment of a cartridge hook 270 of the present application shown in fig. 12 is shown; fig. 13 is a schematic structural view of an embodiment of the use state of the cartridge hook 270 shown in fig. 12, the cartridge hook mounting member is a mounting hole 171, the cartridge hook sleeving part 272 sleeves the cartridge hook 270 on the proximal end of the cartridge 120, the cartridge hook fixing part 273 abuts against the edge of the mounting hole 171 near the driving assembly 300 to fix the cartridge hook 270, and the cartridge hook fixing part 273 protrudes from the mounting hole 171 to sleeve the proximal end of the cartridge gasket 130 on the cartridge hook fixing part 273, and the cartridge hook pressing part 271 presses the proximal end of the cartridge gasket 130. In addition, the end of the cartridge hook pressing part 271 is also provided with a mounting part 276, the mounting part 276 is in an inverted V shape, the opening direction is close to the cartridge gasket 130, and the end of the mounting part 276 is accommodated in the mounting hole 171, so that the space can be saved, and the miniaturization of the anastomotic device is facilitated.

Further, the material of the cartridge pad 130 may be a material implantable in a human body, such as a non-absorbable material, a synthetic absorbable material, or a biomass absorbable material, which is safe and has no side effects, and is an excellent choice for manufacturing medical devices implanted in a human body; the nail bin pad 130 is made of flexible thin materials, such as non-woven fabrics, knitted fabrics, needled objects, woven fabrics, films or pressed sheets, and the like, and the flexible materials are adopted to prepare the nail bin pad 130, so that after the force applied by the force application arm 141 is released, the distal end 131 of the nail bin pad slides out of the nail bin slot 123, the release of the distal end 131 of the nail bin pad is realized, the problem that the distal end 131 of the nail bin pad is difficult to release due to the preparation of the non-flexible materials is avoided, and the reliability of the release of the distal end 131 of the nail bin pad is improved. In another embodiment, the cartridge pad 130 may be made of one or more layers of the flexible material, alternatively, the cartridge pad 130 may be made of two layers of the flexible material; still further, the thickness of the cartridge spacer 130 may be uniform or non-uniform, in an embodiment, the thickness of the cartridge spacer 130 is non-uniform, the thickness of the proximal end of the cartridge spacer 130 is 1.5-3 times the thickness of the distal end 131 of the cartridge spacer, and the thickness of the proximal end of the cartridge spacer 130 is thickened to improve the strength of the proximal end of the cartridge spacer 130, so that the problem that the proximal end of the cartridge spacer 130 breaks after the cartridge fixing hole 133 is provided due to too low thickness of the cartridge spacer 130 is avoided, and the quality and reliability of the product are improved.

Referring to fig. 3, 14-16, fig. 14 is a cross-sectional view of the cartridge assembly 100 of fig. 1 of the present application taken along a longitudinal axis of symmetry; FIG. 15 is an enlarged view of the distal end of the cartridge assembly 100 shown in FIG. 1; fig. 17 is a schematic view of the deformation of the cartridge pad 130 shown in fig. 2, and the arrow in fig. 10 indicates the direction of movement of the cutting blade 310. 14-16, when the cutter 310 is moved to the proximal end of the cartridge 120, the cutting blade opening 312 begins to cut from the cartridge washer auxiliary slit 134, continues to cut the cartridge washer auxiliary cutting line 132 after passing through the cartridge fixing hole 133, and during the cutting process, the proximal end of the cartridge washer 130 is deformed to move to both sides, and then is detached from the cartridge hook to release the proximal end of the cartridge washer 130. When the cutter 310 moves to the distal end of the cartridge assembly 200, the abutment 260 moves to the first elastic fixing member 140, the protruding end 262 of the abutment abuts against the force applying arm 141 of the first elastic fixing member 140, and the force applying arm 141 deforms to move away from the initial position (the dotted line position in fig. 16) toward the cartridge base 110, so as to release the distal end 131 of the cartridge spacer.

In one embodiment, referring to fig. 15, the first elastic fixing member 140 is a washer spring, and includes a force applying arm 141 and a fixing end 142, wherein the fixing end 142 is connected to the cartridge 120, and the force applying arm 141 is connected to the fixing end 142 and is used for fixing the distal end 131 of the cartridge washer. Specifically, the fixed end 142 is fixed to the distal end of the cartridge 120 by welding, riveting, bonding or fastening; in one embodiment, the fixing end 142 is fixed on the distal end of the cartridge magazine 120 by welding, which can fix the fixing end 142 on the distal end of the cartridge magazine 120 more firmly, so that when the force application arm 141 is deformed by an external force, a potential safety hazard caused by that the distal end 131 of the cartridge gasket cannot be reliably released due to the unstable fixing of the fixing end 142 can be avoided, and in another embodiment, the fixing end 142 is fixed on the cartridge base 110.

With continued reference to fig. 2, in one embodiment, the anvil assembly 200 includes: a cutting board housing 210; the anvil body 220 is disposed on the anvil housing 210 to form a second receiving space (not shown) with the anvil housing 210, wherein, referring to fig. 17, fig. 17 is a schematic structural view of the anvil body 220 shown in fig. 2. As shown in fig. 11, the anvil 220 includes an anvil positioning hole 221, a second guiding path 222, and an anvil slot 223; the second guide path 222 corresponds to the first guide path 122 for movement of the cutting blade 310 along the second guide path 222 from the proximal end of the anvil assembly 200 to the distal end thereof, the anvil spacer 230 being mounted on the anvil body 220. A second elastic fixing member 240 is disposed in the second receiving space and is adjacent to the distal end of the anvil assembly 200 to fix the distal end 231 of the anvil spacer.

Referring to fig. 18 and 19, fig. 18 is a schematic structural view of the anvil hook 250 shown in fig. 2; fig. 19 is a schematic structural view of the anvil spacer 230 shown in fig. 2. As shown in fig. 18-19, the anvil spacer 230 includes an anvil spacer distal end 231, an anvil spacer auxiliary cutting line 232, an anvil fixing hole 233, and an anvil auxiliary cut 234; the distal end 231 of the anvil spacer is inserted into the second receiving space through the anvil slot 223 and is fixed by the second elastic fixing member 240, and the proximal end of the anvil spacer 230 is fixed by the anvil hook 250. Specifically, the chopping board hook 250 includes a chopping board hook fixing end 251 and a chopping board hook cantilever 252 fixedly connected to the chopping board hook fixing end 251, the chopping board hook fixing end 251 is fixed on the chopping board body 220 by welding, pasting, clamping and the like, a chopping board fixing hole 233 is formed at the proximal end of the chopping board gasket 230, and the proximal end of the chopping board gasket 230 is sleeved on the chopping board hook cantilever 252 through the chopping board fixing hole 233; the chopping board hanger cantilever 252 is of a curved structure, and compresses the proximal end of the chopping board spacer 230 through a curved end protruding toward the fixed end 251 of the chopping board hanger.

Alternatively, the anvil fixing hole 233 may be a rectangular hole (refer to fig. 19) or a rectangular through hole (refer to fig. 20) corresponding to the shape of the anvil hook cantilever 252, and the use of the rectangular through hole for the anvil fixing hole 233 is not only convenient for production and molding, but also beneficial for the anvil fixing hole 233 to be rapidly separated from the anvil hook cantilever 252 and the anvil body 220 during the cutting process, thereby improving the reliability of the release process of the anvil gasket 230.

Alternatively, the extension direction of the anvil hook cantilever 252 may be parallel or perpendicular to the direction of the anvil pad auxiliary cutting line 232; in one embodiment, please refer to fig. 18, 19, 23, 24, fig. 23 is a schematic diagram illustrating the assembly of the anvil spacer 230 and the anvil body 220 shown in fig. 2; fig. 24 is a partially enlarged view of the structure i shown in fig. 23, in which the extension direction of the anvil hook cantilever 252 is parallel to the direction of the anvil washer auxiliary cutting line 232 and is correspondingly installed at the position of the rectangular hole on the anvil fixing hole 233. Still further, the cantilever of the chopping board hook is S-shaped, the initial position of the cantilever of the chopping board hook 250 is fixed at the middle position of the fixed end of the chopping board hook 250, the bending part close to the initial position is used for limiting the chopping board fixing hole 233, and the bending part far away from the initial position is used for abutting and fixing the proximal end of the chopping board gasket. Of course, with further reference to fig. 21 and 22, fig. 21 is a schematic structural view of a second embodiment of a chopping board hook 250 of the present application; fig. 22 is a schematic structural diagram of a third embodiment of an anvil hook 250 according to the present application, the starting position of the anvil hook cantilever 251 may also be located at the end face of the anvil hook fixing end 251, while the anvil hook cantilever 252 may have other shapes such as a U shape, which corresponds to the shape of the anvil body 220, so as to achieve firm fixing of the anvil hook fixing end 251, and the anvil hook fixing end 251 may be a horizontal plane or an inclined plane, so long as the proximal end of the anvil pad 230 is conveniently fixed and released.

Similarly, the cartridge fixing hole 133 may have the same shape as the anvil fixing hole 233 (refer again to fig. 19 and 20), so that the cartridge fixing hole 133 is conveniently sleeved on the cartridge cantilever 121 and rapidly separated from the cartridge cantilever 121 during cutting, thereby improving the reliability of the fixing and releasing process of the cartridge spacer 130.

Further, the material of the anvil pad 230 may be a material implantable in a human body, such as a non-absorbable material, a synthetic absorbable material, or a biomass absorbable material, which is safe and has no side effects, and is an excellent choice for manufacturing medical devices to be implanted in a human body; the chopping board gasket 230 is made of a flexible thin material, and can be made of a non-woven fabric, a knitted fabric, a needled object, a woven fabric, a film or a pressed sheet, and the like, after the pressure applied by the pressure applying arm 241 is released, the distal end 231 of the chopping board gasket 230 can slide out of the chopping board slot 223 by adopting the flexible material, so that the release of the distal end 231 of the chopping board gasket is realized, the problem that the distal end 231 of the chopping board gasket is difficult to release due to the preparation of the non-flexible material is avoided, and the release reliability of the distal end 231 of the chopping board gasket is improved. In another embodiment, the anvil pad 230 may be made of one or more layers of the flexible material, alternatively, the anvil pad 230 may be made of two layers of the flexible material; further, the thickness of the anvil spacer 230 may be uniform or non-uniform, and in one embodiment, the thickness of the anvil spacer 230 is non-uniform, the thickness of the proximal end of the anvil spacer 230 is 1.5-3 times the thickness of the distal end 231 of the anvil spacer, and thickening the proximal end of the anvil spacer 230 can improve the strength of the proximal end of the anvil spacer 230, thereby avoiding the problem that the proximal end of the anvil spacer 230 is broken after the anvil fixing hole 233 is formed due to too low thickness of the anvil spacer 230, and improving the quality and reliability of the product.

Referring to fig. 25, fig. 25 is a cross-sectional view of the anvil assembly 200 of fig. 1 along a longitudinal symmetry axis, and the second elastic fixing member 240 is disposed in the second receiving space and near the distal end of the anvil assembly 200 to fix the distal end 231 of the anvil spacer; the second elastic fixing member 240 may be a shim spring, an elastic sheet, a cylindrical spring, or a torsion spring, which may be decomposed into an independent energy storage spring and a structure for compressing, and the first elastic fixing member 140 may be replaced with the second elastic fixing member 240 under a proper installation position and operating condition. In one embodiment, the second elastic fixing member 240 may be made of a metal material, such as copper, aluminum, etc., or may be made of a plastic material, such as a thermoplastic elastomer TPE, an acryl plastic PMMA, etc., and the second elastic fixing member 240 may be made of an elastic energy storage material to ensure reliable fastening of the distal end 231 of the anvil pad and release the distal end 131 of the anvil pad at the moving end of the cutter 310 by deforming the energy storage elastic fixing member, so that the operation is safe and reliable.

In one embodiment, the second elastic fixing member 240 is a pad spring, which includes a pressure applying arm 241 and a connecting end 242, wherein the connecting end 242 is connected to the anvil housing 210, and the pressure applying arm 241 is connected to the connecting end 242 and is used for fixing the distal end 231 of the anvil pad. Specifically, the connection end 242 is fixed to the anvil housing 210 by welding, riveting, bonding or fastening; in one embodiment, the connecting end 242 is fixed on the anvil shell 210 by a welding manner, and the welding manner can fix the connecting end 242 on the anvil shell 210 more firmly, so that when the pressure applying arm 241 is deformed by an external force, the potential safety hazard caused by that the distal end 231 of the anvil gasket cannot be released reliably due to the unstable fixing of the connecting end 242 can be avoided.

Referring now to fig. 26-28, fig. 26 is an enlarged view of the distal end of the anvil assembly 200 shown in fig. 1; FIG. 27 is an enlarged view of the proximal end of the anvil assembly 200 shown in FIG. 1; fig. 28 is a schematic view of the deformation of the anvil spacer 230 shown in fig. 2. During the movement of the cutter 310, when the cutter 310 moves to the proximal end of the anvil assembly 200, the cutting blade opening 312 starts cutting from the anvil spacer auxiliary slit 234, and continues cutting the anvil spacer auxiliary cutting line 232 after passing through the anvil fixing hole 233, and during the cutting, the proximal end of the anvil spacer 230 is deformed to move to both sides, and then is separated from the fixing pin 250 to release the proximal end of the anvil spacer 230. When the cutter 310 moves to the distal end of the cartridge assembly 200, the front protruding portion of the upper cutter body 311 moves to the second elastic fixing member 240, and the front protruding portion of the upper cutter body 311 presses the pressure applying arm 241 of the second elastic fixing member 240 to force the pressure applying arm 241 to deform and move away from the initial position (the dotted line position in fig. 28) toward the anvil housing 210, and is itself deformed into a straight shape by the L-shape of the initial position, thereby releasing the distal end 131 of the anvil pad.

In summary, in the present application, the distal ends of the anvil spacer 230 and the cartridge spacer 130 are inserted into the anvil slot 223 and the cartridge slot 123 respectively for fastening, so that the distal ends 231 and 131 of the anvil spacer and the cartridge spacer avoid the risk of flanging caused by scraping with tissues, and the distal ends can naturally and smoothly spread according to the movement direction of the stapler jaw contacting with tissues, thereby greatly reducing the risk of wrinkling after the jaw is clamped, and further improving the anastomosis quality of the anvil spacer 230 and the cartridge spacer 130 with tissues. At the same time, the contoured shape and size of the anvil spacer 230 and cartridge spacer 130 are similar to and slightly smaller than the tissue contacting surfaces of the attached cartridge 120 and anvil 220, avoiding the risk of unnecessary contact of the spacer edges with tissue during use, causing turnover or movement. In addition, the compacting elastic elements (the first elastic fixing piece 140 and the second elastic fixing piece 240) in the scheme are made of medical stainless steel materials, and the connection mode of the compacting elastic elements and the nail box 120 and the chopping board shell 210 does not add extra materials, so that the biosafety risk caused by bad filtering materials does not exist.

The distal ends 231 and 131 of the anvil spacer are positioned by compression, and the proper pre-compression force of the anvil spacer 230 and the cartridge spacer 130 is achieved due to the proper design of the force arm structure of the compression spring element (the force arm 141 of the first spring retainer 140 and the force arm 241 of the second spring retainer 240), and the pre-compression force of the compression spring element is not affected during the repeated clamping and resetting actions of the stapler jaw (the cartridge assembly 100 and the anvil assembly 200), thereby ensuring a reliable positioning of the anvil spacer 230 and the cartridge spacer 130 during this action.

Meanwhile, the fixing and releasing actions of the far end 231 of the chopping board gasket and the far end 131 of the nail bin gasket are implemented by the same element, intermediate transmission links are reduced, the linkage releasing process is simplified, and the pressed position of the elastic element pressing arm is reasonably designed, so that the pressing force applying direction is a labor-saving lever, the direct acting force of a user is greatly reduced, the man-machine efficiency of the system is improved, the releasing action is faster, labor-saving and higher in reliability.

On the other hand, since the nail-abutting seat 260 does not reset with the cutter 310, it will remain at the distal end of the cartridge 120 after completing the firing, and always maintain the pressing of the force arm 141 against the first elastic fixing member 140; the force application arm 241 of the second elastic fixing member 240 is deformed plastically due to the pressing of the front protruding portion of the upper cutter body 311 of the cutter 310, and cannot be reset freely, so that the anvil washer 230 and the cartridge washer 130 are released completely after the reset of the cutter 310 is completed.

In addition, the compressed elastic element in this embodiment does not change the external dimensions of the anastomat during the movement process of positioning and releasing the chopping board gasket 230 and the cartridge gasket 130, and has no potential safety hazard of secondary injury caused by contact of part of structures with human tissues. The chopping board gasket 230 and the nail bin gasket 130 are fixed at the corresponding positions of the jaw of the anastomat through the compressed elastic elements before use, a user can complete effective use of the device according to the using method of the existing standard anastomat without additional operation program, thereby reducing the learning time required by using the novel equipment and being convenient and quick to use; the method and the device for fastening the gasket are mature and stable in process, the added parts of the gasket fastening system are simple in structure and convenient to assemble, mass production can be achieved in a conventional processing mode, the overall process difficulty of the system is low, and the manufacturing cost is low.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the present application.

Claims

1. A surgical stapler apparatus, the stapler apparatus comprising:

the anastomat device further comprises a nail bin gasket and a cutting board gasket, wherein the proximal end of the nail bin gasket is detachably arranged on the nail bin box through a nail bin box hook, the proximal end of the cutting board gasket is fixedly arranged on the cutting board assembly through a cutting board hook, and the nail bin box hook and the cutting board hook are elastic energy storage pieces; a cutting knife is arranged on the driving assembly, and when the cutting knife moves from the proximal ends of the cartridge box and the chopping block assembly to the distal ends of the cartridge box and the chopping block assembly, the cartridge gasket and the chopping block gasket are cut and separated from the cartridge box and the chopping block assembly respectively;

the elastic energy storage piece comprises an independent energy storage spring and a compression execution piece arranged on the nail bin box;

the nail box hook is an independent elastic energy storage piece and comprises a nail box hook pressing part, a nail box hook fixing part and a nail box hook sleeving part for connecting the nail box hook pressing part and the nail box hook fixing part, and the nail box hook sleeving part enables the nail box hook to be sleeved at the near end of the nail box;

the cartridge magazine and the cartridge assembly form a first receiving space, a first guide path is provided on the cartridge magazine for the cutting blade to move along the first guide path from the proximal end of the cartridge magazine to the distal end thereof, and the cartridge assembly further comprises:

a first elastic fixing member disposed in the first accommodation space and disposed near a distal end of the cartridge magazine to fix a distal end of the cartridge spacer;

the nail propping seat is arranged in the first accommodating space and props against the cutting knife to move along with the movement of the cutting knife, wherein when the nail propping seat moves to the first elastic fixing piece, the first elastic fixing piece deforms to release the distal end of the nail bin gasket;

the nail bin hook fixing part is provided with a protruding end, the nail bin hook fixing part is clamped in a nail bin hook groove at one side of the nail bin far away from the nail bin gasket so as to fix the nail bin hook, the near end of the nail bin gasket is sleeved between the nail bin hook pressing part and the nail bin sleeve part, and the near end of the nail bin gasket is abutted by the nail bin hook pressing part;

the anvil assembly includes:

a cutting board shell;

the chopping block body is arranged on the chopping block shell to form a second accommodating space with the chopping block shell, a second guide path is formed in the chopping block body, the second guide path corresponds to the first guide path and is used for enabling the cutting knife to move from the proximal end of the chopping block assembly to the distal end of the chopping block assembly along the second guide path, and the chopping block gasket is arranged on the chopping block body;

a second elastic fixing piece, which is arranged in the second accommodating space and is close to the distal end of the chopping block assembly so as to fix the distal end of the chopping block gasket;

the chopping board hook comprises a chopping board hook fixed end and a chopping board hook cantilever fixedly connected with the chopping board hook fixed end, the chopping board hook fixed end is welded on the chopping board body, a chopping board fixed hole is formed in the proximal end of the chopping board gasket, and the proximal end of the chopping board gasket is sleeved on the chopping board hook cantilever through the chopping board fixed hole; the chopping block couple cantilever compresses tightly the proximal end of chopping block gasket.

2. The stapler device of claim 1, further comprising a cartridge magazine hook mount disposed on the cartridge magazine for cooperating with the cartridge magazine hook sleeved on the proximal end of the cartridge magazine to secure the proximal end of the cartridge shim, wherein the proximal end of the cartridge shim is disengaged from the cartridge magazine hook to release the proximal end of the cartridge shim when the cutting knife is moved to a position corresponding to the cartridge magazine hook mount.

3. The stapler device of claim 2, wherein the cartridge hook mount is a hollow protrusion, the proximal end of the cartridge spacer is sleeved on the hollow protrusion, the cartridge hook securing portion extends into the hollow slot of the hollow protrusion to secure the cartridge hook, and the cartridge hook compressing portion compresses the proximal end of the cartridge spacer.

4. The stapler apparatus according to claim 3, wherein the cartridge magazine hook mounting member is a mounting hole, the cartridge magazine hook housing portion houses the cartridge magazine hook at a proximal end of the cartridge magazine, the cartridge magazine hook fixing portion abuts against an edge of the mounting hole near the driving assembly to fix the cartridge magazine hook, and the cartridge magazine hook fixing portion protrudes from the mounting hole to house the proximal end of the cartridge spacer at the cartridge magazine hook fixing portion, and the cartridge magazine hook pressing portion presses the proximal end of the cartridge spacer.

5. The stapler apparatus of claim 1, wherein the cutting blade comprises: the cutting tool comprises an upper tool body, a lower tool body and a cutting edge part, wherein the cutting edge part is arranged between the upper tool body and the lower tool body, a protruding part is arranged at the front end of the upper tool body, and when the cutting tool moves to the far end of the cutting board assembly, the protruding part of the upper tool body is abutted against the second elastic fixing piece so as to force the second elastic fixing piece to release the far end of the cutting board gasket.