CN107802302B

CN107802302B - Anastomat device for operation

Info

Publication number: CN107802302B
Application number: CN201710961025.1A
Authority: CN
Inventors: 肖继里; 朱志远; 曾静雯; 潘高峰
Original assignee: Chengdu Ehoo Hengrui Medical Technology Co Ltd
Current assignee: Chengdu Ehoo Hengrui Medical Technology Co Ltd
Priority date: 2017-10-16
Filing date: 2017-10-16
Publication date: 2019-12-20
Anticipated expiration: 2037-10-16
Also published as: CN107802302A

Abstract

The invention discloses a surgical stapler device, comprising: the nail bin assembly comprises a nail bin base and a nail bin box arranged on the nail bin base; the far end of the cutting board component is far away from the nail bin component, and the near end of the cutting board component is close to the near end of the nail bin box and is pivoted on the nail bin base so as to be rotatably arranged on the nail bin component; the driving assembly is arranged on the nail bin base and is close to the near ends of the nail bin box and the chopping board assembly; the nail bin box is provided with a nail bin gasket, the chopping board assembly is provided with a chopping board gasket, the driving assembly is provided with a cutting knife, and when the cutting knife moves from the near ends of the nail bin box and the chopping board assembly to the far ends of the nail bin box and the chopping board assembly, the nail bin gasket and the chopping board gasket are cut and separated from the nail bin box and the chopping board assembly respectively. By the mode, the chopping block gasket and the nail bin box gasket are released conveniently, the positioning is reliable, and the anastomosis efficiency is improved.

Description

Anastomat device for operation

Technical Field

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

Background

Compared with the traditional manual suturing technology, the anastomat for mechanical suturing has the advantages of small tissue reaction, orderly arrangement of the suturing nails and equal intervals, and effectively avoids the problems of over-dense manual suturing and over-loose ligation; meanwhile, the anastomat for mechanical suturing is simple and convenient to operate, and the operation time of a doctor can be greatly shortened.

With the widespread use of staplers, the problem of complications associated with staplers has also become increasingly appreciated. As the staples used in the stapler are usually made of metal materials such as titanium, and have hard texture, and have poor mechanical compatibility when used for soft tissue suture, and are easy to cause mechanical injury to fragile soft tissue, and easily cause phenomena such as anastomotic leakage, bleeding, fistula and the like, for the above problems, various methods have been clinically adopted to reduce the occurrence of complications at present, wherein, adding a gasket between the stapler and the tissue to reinforce the anastomotic site is one of the simplest and most effective methods at present. The added gasket can play a role of a liner for the tissues of a patient, strengthen the tensile strength of local tissues, improve the sealing performance of an anastomotic stoma and prevent the anastomotic stoma from leaking; the cutting of the anastomotic nail to the tissue can be reduced, and the fracture and bleeding of the anastomotic orifice can be prevented; and the local pressure of the anastomotic stoma can be balanced, and the anastomotic fistula and the stenosis caused by local blood circulation unsmooth due to stress concentration are avoided.

However, the inventor of the present application finds, in a long-term research and development, that the current anastomosis device with the gasket added thereto generally has the problems of complex release structure and low release reliability of the gasket, and is difficult to popularize and apply.

Disclosure of Invention

The invention mainly solves the technical problem of providing an anastomosis device for operation, which can improve the positioning reliability and the releasing reliability of a gasket additionally arranged in the anastomat device.

In order to solve the technical problems, the invention adopts a technical scheme that: there is provided a surgical stapler device, the device comprising:

the nail bin assembly comprises a nail bin base and a nail bin box arranged on the nail bin base, wherein the far end of the nail bin box is exposed out of the nail bin base, and the near end of the nail bin box is arranged on the nail bin base;

the far end of the cutting board component is far away from the nail bin component, and the near end of the cutting board component is close to the near end of the nail bin box and is pivoted on the nail bin base so as to be rotatably arranged on the nail bin component;

the driving component is arranged on the nail bin base and is close to the near ends of the nail bin box and the cutting board component, wherein the driving component can move from the near ends of the nail bin box and the cutting board component to the far ends of the nail bin box and the cutting board component along the nail bin base so as to enable the cutting board component to be attached to the nail bin box;

the nail bin box is provided with a nail bin gasket, the chopping board assembly is provided with a chopping board gasket, the driving assembly is provided with a cutting knife, and when the cutting knife moves from the near ends of the nail bin box and the chopping board assembly to the far ends of the nail bin box and the chopping board assembly, the nail bin gasket and the chopping board gasket are cut and separated from the nail bin box and the chopping board assembly respectively.

Wherein, the nail magazine and the nail bin assembly constitute a first accommodating space, a first guide path is arranged on the nail magazine for the cutting knife to move from the near end of the nail magazine to the far end of the nail magazine along the first guide path, and the nail bin assembly further comprises:

the first elastic fixing piece is arranged in the first accommodating space and close to the far end of the nail bin box so as to fix the far end of the nail bin gasket;

the nail abutting seat is arranged in the first accommodating space and abuts against the cutting knife so as to move along with the movement of the cutting knife, and when the nail abutting seat moves to the first elastic fixing piece, the first elastic fixing piece deforms so as to release the far end of the nail bin gasket;

the nail bin box cantilever is arranged on the nail bin box and used for fixing the near end of the nail bin gasket, and when the cutting knife moves to the position corresponding to the nail bin box cantilever, the near end of the nail bin gasket falls off from the nail bin box cantilever to release the near end of the nail bin gasket.

The distal end of the nail bin box is provided with an inserting groove, and the distal end of the nail bin gasket is inserted into the first accommodating space through the nail bin inserting groove and is fixed by the first elastic fixing piece.

The near end of the nail bin gasket is provided with a nail bin fixing hole, and the near end of the nail bin gasket is sleeved on the nail bin box cantilever through the nail bin fixing hole so as to fix the near end of the nail bin gasket.

The nail pushing seat comprises a nail pushing seat body and a protruding structure, and the length of the protruding structure is 1.2-5 times that of the nail pushing seat body.

Wherein, the chopping block subassembly includes:

a chopping block housing;

the cutting knife assembly comprises an anvil plate body, a first guide path and a second guide path, wherein the anvil plate body is arranged on the anvil plate shell to form a second containing space with the anvil plate shell, the second guide path corresponds to the first guide path so that the cutting knife can move from the near end of the anvil plate assembly to the far end of the anvil plate assembly along the second guide path, and the anvil plate gasket is arranged on the anvil plate body;

the second elastic fixing piece is arranged in the second accommodating space and is close to the far end of the chopping board assembly so as to fix the far end of the chopping board gasket;

and the positioning pin is arranged on the chopping block body and is close to the near end of the chopping block component so as to fix the near end of the chopping block gasket.

The second elastic fixing piece is a gasket spring and comprises a pressure force applying arm and a connecting end, wherein the connecting end is connected to the chopping board shell, and the pressure force applying arm is connected to the connecting end and is used for fixing the far end of the chopping board gasket.

The chopping block body is provided with a chopping block slot, and the far end of the chopping block gasket is inserted into the second accommodating space through the chopping block slot and is fixed by the second elastic fixing piece.

The cutting board fixing hole is formed in the near end of the cutting board gasket, and the near end of the cutting board gasket is sleeved on the locating pin through the cutting board fixing hole so as to fix the near end of the cutting board gasket.

Wherein, the cutting knife includes: go up cutter unit, lower cutter unit and cutting edge portion, wherein, cutting edge portion sets up between last cutter unit and the lower cutter unit, just the front end of going up cutter unit is provided with the bulge, works as the cutting knife moves to when the distal end of chopping block subassembly, the bulge of going up cutter unit conflicts second elastic fixing piece, in order to force second elastic fixing piece releases the distal end of chopping block gasket.

The invention has the beneficial effects that: according to the invention, the nail bin box is provided with the nail bin gasket, the chopping board assembly is provided with the chopping board gasket, the driving assembly is provided with the cutting knife, and when the cutting knife moves from the near ends of the nail bin box and the chopping board assembly to the far ends of the nail bin box and the chopping board assembly, the nail bin gasket and the chopping board gasket are cut and separated from the nail bin box and the chopping board assembly respectively; because the cutting board gasket and the nail bin gasket are respectively released from the cutting board assembly and the nail bin box in the movement process of the cutting knife, the releasing actions of different gaskets are implemented by the cutting knife, the intermediate transmission links are reduced, the linkage releasing process is simplified, the releasing structure is simple, the releasing reliability is high, and the popularization and the application of the surgical anastomosis device are facilitated.

Drawings

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

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

fig. 3 is a schematic structural view of the cutting blade 310 shown in fig. 2;

FIG. 4 is a schematic structural view of the anvil 260 shown in FIG. 2;

FIG. 5 is a schematic view of the cartridge magazine 120 shown in FIG. 2;

FIG. 6 is a schematic structural view of cartridge shim 130 shown in FIG. 2;

FIG. 7 is a cross-sectional view of the staple cartridge assembly 100 shown in FIG. 1 along a longitudinal axis of symmetry;

FIG. 8 is an enlarged view of the distal end of the staple cartridge assembly 100 shown in FIG. 1;

FIG. 9 is an enlarged view of the proximal end of the staple cartridge assembly 100 shown in FIG. 1;

FIG. 10 is a schematic view of a deformation of cartridge shim 130 shown in FIG. 2;

FIG. 11 is a schematic view of the anvil body 220 shown in FIG. 2;

FIG. 12 is a schematic view of the anvil body 250 shown in FIG. 2;

FIG. 13 is a schematic view of the anvil pad 230 shown in FIG. 2;

FIG. 14 is another schematic view of the anvil pad 230 shown in FIG. 2;

FIG. 15 is a schematic view of the anvil shim 230 shown in FIG. 2 assembled with the anvil body 220;

FIG. 16 is an enlarged partial view of structure I shown in FIG. 15;

FIG. 17 is a cross-sectional view of the anvil assembly 200 shown in FIG. 1 along the longitudinal axis of symmetry;

FIG. 18 is an enlarged view of the distal end of the anvil assembly 200 shown in FIG. 1;

FIG. 19 is an enlarged view of the proximal end of the anvil assembly 200 shown in FIG. 1;

FIG. 20 is a schematic view of the anvil pad 230 shown in FIG. 2 undergoing deformation.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments and combinations of different embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any inventive step, are within the scope of the present invention. Further, in the following description of the present invention, the "proximal end" refers to an end closer to a user or operator (i.e., a surgeon or a physician) and the "distal end" refers to an end farther from the user, but the above definition is merely for convenience of description and is not intended to limit the present invention.

Referring to fig. 1 and 2, fig. 1 is an assembly view of a surgical stapler apparatus according to an embodiment of the present invention, and fig. 2 is an exploded view of the surgical stapler apparatus shown in fig. 1. As shown in FIGS. 1-2, a surgical stapling apparatus, in accordance with an embodiment of the present invention, includes a cartridge assembly 100, an anvil assembly 200, and a drive assembly 300. Wherein, during use, the drive assembly 300 presses against the anvil assembly 200 to cause the anvil assembly 200 to form a jaw with the cartridge assembly 100 and rotate closed to clamp the anastomosed tissue to be cut.

Specifically, the staple cartridge assembly 100 includes a staple cartridge base 110 and a staple cartridge 120 mounted on the staple cartridge base 110, wherein a distal end of the staple cartridge 120 is exposed outside the staple cartridge base 110, and a proximal end of the staple cartridge 120 is mounted on the staple cartridge base 110. In addition, the cartridge assembly 100 further includes a cartridge spacer 130 and a first elastic fastener 140.

The distal end of the anvil assembly 200 is far away from the cartridge assembly 200, and the proximal end thereof is close to the proximal end of the cartridge 120 and is pivoted to the cartridge base 110 to be rotatably disposed on the cartridge assembly 100; in addition, the anvil assembly 200 further includes an anvil pad 230, a second resilient fixing member 240, a positioning pin 250, a staple abutment 260, a plurality of staples (not shown) and a plurality of staple pusher tabs (not shown).

A drive assembly 300 is disposed on the cartridge base 110 and adjacent to the proximal ends of the staple cartridge 120 and the anvil assembly 200, wherein the drive assembly 300 is movable along the cartridge base 110 from the proximal ends of the staple cartridge 120 and the anvil assembly 200 to the distal ends of the staple cartridge 120 and the anvil assembly 200 to engage the anvil assembly 200 with the cartridge; in addition, the driving assembly 300 includes a cutting blade 310, a driving member (not shown) for driving the cutting blade 310 to move, a cutting blade limiting block 320, and a guide shaft 330, wherein the number of the guide shaft 330 may be set to 1-3, and in one embodiment, the number of the guide shaft 330 is 1.

As shown in fig. 2, the cartridge pad 130 is mounted on the magazine 120, the anvil pad 230 is mounted on the anvil assembly 200, and the cutting knife 310 is disposed on the driving assembly 300, such that when the cutting knife 310 moves from the proximal end of the magazine 120 and the anvil assembly 200 to the distal end of the magazine 120 and the anvil assembly 200, the magazine pad 230 and the anvil pad 130 are cut and detached from the magazine 120 and the anvil assembly 200, respectively.

Please refer to fig. 3, wherein fig. 3 is a schematic structural diagram of the cutting blade 310 shown in fig. 2. As shown in fig. 3, the cutting blade 310 includes: the cutter comprises an upper cutter body 311, a lower cutter body 313 and a cutter part 312, wherein the cutter part 312 is arranged between the upper cutter body 311 and the lower cutter body 313, the front end of the upper cutter body 311 is provided with a convex part, and the convex part at the front end of the upper cutter body 311 can apply pressure to a structure in contact with the convex part.

Please refer to fig. 4, wherein fig. 4 is a schematic structural diagram of the nail abutting seat 260 shown in fig. 2. As shown in fig. 4, the nail abutting seat 260 is disposed in the first accommodating space and abuts against the cutting knife 310 to move along with the movement of the cutting knife 310; the nail abutting seat 260 further comprises a nail abutting seat body 261 and a protruding structure 262 arranged on the nail abutting seat body 261, the nail abutting seat body 261 is in interference connection with the cutting knife 310, the height of the far end of the protruding structure 262 is smaller than that of the near end of the protruding structure 262, and the far end of the protruding structure 262 is used for applying pressure to a structure in contact with the protruding structure 262; further, the length of the protruding structure 262 is 1.2-5 times the length of the nail seat body 261, and in one embodiment, the length of the protruding structure 262 is 1.5 times the length of the nail seat body 261.

Referring to fig. 5, fig. 5 is a schematic structural view of the magazine 120 shown in fig. 2. As shown in fig. 5, the magazine 120 includes a magazine cantilever 121, a first guide path 122 and a magazine slot 123; in one embodiment, the staple cartridge 120 and the staple cartridge assembly 200 define a first receiving space (not shown), and the first guide path 122 is defined in the staple cartridge 120 for allowing the cutting knife 310 to move along the first guide path 122 from the proximal end of the staple cartridge 120 to the distal end thereof.

With continued reference to FIG. 2, the staple cartridge assembly 100 further includes a first resilient securing member 140 disposed within the first receiving space and proximate to the distal end of the staple cartridge magazine 120 for securing the distal end 131 of the staple cartridge spacer; first elastic fixing piece 140 can be for filling up the structure of leaf spring, flexure strip, cylinder spring or torsional spring etc. resolvable for independent energy storage portion and pressfitting portion, and it can be metal material, make like copper, aluminium etc. also can be made by plastic materials, like thermoplastic elastomer TPE, acryl plastics PMMA etc. the messenger has elastic energy storage material preparation first elastic fixing piece 140 can be in the assurance right the distal end 131 of nail storehouse gasket reliably fastens, can again the end of cutting knife 310 motion is through making first elastic fixing piece 140 takes place deformation and release the distal end 131 of nail storehouse gasket, not only safe and reliable, and easy operation.

In one embodiment, referring to FIG. 6, FIG. 6 is a schematic structural view of the cartridge spacer 130 shown in FIG. 2. As shown in FIG. 6, cartridge shim 130 includes a distal end 131 of the cartridge shim, a cartridge shim secondary cutting line 132, a cartridge retention hole 133, and a cartridge shim secondary cut 134. The distal end 131 of the nail bin spacer is inserted into the first accommodating space through the nail bin inserting groove 123 and is fixed by the first elastic fixing piece 140; a nail bin fixing hole 133 is formed in the proximal end of the nail bin spacer 130, and the proximal end of the nail bin spacer 130 is sleeved on the nail bin cantilever 121 through the nail bin fixing hole 133 to fix the proximal end of the nail bin spacer 130.

Furthermore, the material of the nail bin gasket 130 can be a non-absorbable material, a synthetic absorbable material or a biomass absorbable material, which can be implanted into a human body, and the materials are safe and have no side effect, and are excellent choices for manufacturing medical instruments implanted into the human body; the nail bin gasket 130 is made of a flexible thin material, and can be made of a non-woven fabric, a knitted fabric, a needled product, a woven fabric, a thin film or a pressed sheet, and the like, the nail bin gasket 130 made of the flexible material can enable the distal end 131 of the nail bin gasket to slide out of the nail bin slot 123 after the pressure of the force applying arm 141 is released, so that the release of the distal end 131 of the nail bin gasket is realized, the problem that the distal end 131 of the nail bin gasket is difficult to release due to the fact that the nail bin gasket 130 made of the non-flexible material is solved, and the reliability of the release of the distal end 131 of the nail bin gasket is improved. In another embodiment, cartridge shim 130 may be made from one or more layers of the flexible material, alternatively, cartridge shim 130 may be made from two layers of the flexible material; furthermore, the thickness of the nail bin gasket 130 may be uniform or non-uniform, in one embodiment, the thickness of the nail bin gasket 130 is non-uniform, the thickness of the proximal end of the nail bin gasket 130 is 1.5-3 times of the thickness of the distal end 131 of the nail bin gasket, the strength of the proximal end of the nail bin gasket 130 can be improved by thickening the proximal end of the nail bin gasket 130, the problem that the proximal end of the nail bin gasket 130 is broken after the nail bin fixing hole 133 is arranged due to too low thickness of the nail bin gasket 130 is avoided, and the quality and reliability of a product are improved.

Referring to FIGS. 7-10, FIG. 7 is a cross-sectional view of the cartridge assembly 100 of FIG. 1 taken along a longitudinal axis of symmetry in accordance with the present invention; FIG. 8 is an enlarged view of the distal end of the staple cartridge assembly 100 shown in FIG. 1; FIG. 9 is an enlarged view of the proximal end of the staple cartridge assembly 100 shown in FIG. 1; FIG. 10 is a schematic view of the deformation of the cartridge spacer 130 shown in FIG. 2, and the arrow in FIG. 10 indicates the direction of movement of the cutting knife 310. As shown in fig. 7-10, when the cutting knife 310 moves to the proximal end of the cartridge 120, the cutting knife edge opening 312 begins to cut from the cartridge pad auxiliary incision 134, and continues to cut the cartridge pad auxiliary cutting line 132 after passing through the cartridge fixing hole 133, during the cutting process, the proximal end of the cartridge pad 130 is deformed and moves to both sides, and then falls off from the cartridge cantilever 121 to release the proximal end of the cartridge pad 130. When the cutting knife 310 moves to the distal end of the nail cartridge assembly 200, the nail abutting seat 260 moves to the first elastic fixing member 140, the protruding end 262 of the nail abutting seat abuts against the force applying arm 141 of the first elastic fixing member 140, and the force applying arm 141 deforms and moves away from the initial position (the dotted line position in fig. 10) toward the nail cartridge base 110 to release the distal end 131 of the nail cartridge gasket.

In one embodiment, referring to fig. 8, the first elastic fixing member 140 is a washer spring, which includes a force applying arm 141 and a fixing end 142, wherein the fixing end 142 is connected to the magazine 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 magazine washer. Specifically, the fixing end 142 is fixed to the distal end of the nail magazine 120 by welding, riveting, bonding or fastening; in one embodiment, the fixing end 142 is fixed to the distal end of the magazine 120 by welding, which can more firmly fix the fixing end 142 to the distal end of the magazine 120, and when the force applying arm 141 is deformed by an external force, the safety hazard caused by the distal end 131 of the magazine gasket not being reliably released due to the fixing weakness of the fixing end 142 can be avoided, and in another embodiment, the fixing end 142 is fixed to the magazine base 110.

Continuing to refer to fig. 2, in one embodiment, the anvil assembly 200 includes: the anvil shell 210; an anvil plate 220 disposed on the anvil shell 210 to form a second receiving space (not shown) with the anvil shell 210, wherein fig. 11 is a schematic structural view of the anvil plate 220 shown in fig. 2. As shown in fig. 11, the anvil body 220 includes an anvil body 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 the cutting blade 310 to move along the second guide path 222 from the proximal end of the anvil assembly 200 to the distal end thereof, and the anvil pad 230 is mounted on the anvil body 220.

Referring to fig. 12 and 13, fig. 12 is a schematic structural view of the anvil body 250 shown in fig. 2; FIG. 13 is a schematic view of the anvil pad 230 shown in FIG. 2. As shown in fig. 12-13, the anvil pad 230 includes an anvil pad distal end 231, an anvil pad auxiliary cut line 232, an anvil securing hole 233, and an anvil auxiliary cut 234; the distal end 231 of the anvil pad is inserted into the second receiving space through the anvil insertion groove 223 and fixed by the second elastic fixing member 240. The positioning pin 250 is installed on the anvil plate 220 and disposed near the proximal end of the anvil assembly 200 to fix the proximal end of the anvil pad 230, the positioning pin 250 may be cylindrical or L-shaped, and when the positioning pin 250 is L-shaped, the anvil pad 230 is sleeved on the positioning pin 250 to fix the proximal end of the anvil pad 230. Specifically, the positioning pin 250 includes a vertical fixing end 251 and a horizontal cantilever 252, the vertical end 251 passes through the anvil fixing hole 233 and the anvil positioning hole 221, and the horizontal cantilever 252 holds the proximal end of the anvil pad 230 to fix the proximal end of the anvil pad 230.

Optionally, the cutting board fixing holes 233 may be rectangular holes (see fig. 13) or rectangular through holes (see fig. 14) corresponding to the positioning pins 250, and the rectangular through holes are adopted for the cutting board fixing holes 233, which not only facilitates production and molding, but also facilitates the cutting board fixing holes 233 to be quickly separated from the positioning pins 250 and the cutting board body 220 in the cutting process, thereby improving the reliability of the release process of the cutting board gasket 230.

Optionally, the extension direction of the horizontal cantilever 252 can be parallel or perpendicular to the direction of the anvil pad auxiliary cutting line 232; in one embodiment, referring to fig. 12 and 13, the extension direction of the horizontal cantilever 252 is parallel to the direction of the anvil pad auxiliary cutting line 232 and corresponds to the position of the rectangular hole installed on the anvil plate fixing hole 233; in another embodiment, referring to fig. 15 and 16, the extension direction of the horizontal cantilever 252 is perpendicular to the direction of the anvil pad auxiliary cutting line 232 and away from the anvil pad auxiliary cutting line 232, so that the horizontal cantilever 252 forms a lateral limit for the anvil pad 230, and prevents the anvil pad 230 from being separated from the constraint of the positioning pin 250 during fine adjustment of the anvil pad in the front and back directions, and meanwhile, the resistance of the horizontal cantilever 252 to the anvil pad 230 during cutting is small, thereby facilitating the release of the proximal end of the anvil pad 230.

Similarly, the cartridge fixing hole 133 may have the same shape as the anvil fixing hole 233 (see fig. 13 and 14), so that the cartridge fixing hole 133 can be conveniently sleeved on the cartridge suspension arm 121 and can be quickly separated from the cartridge suspension arm 121 during the cutting process, thereby improving the reliability of the fixing and releasing process of the cartridge gasket 130.

Furthermore, the material of the anvil plate pad 230 may be non-absorbable material, artificially synthesized absorbable material or biomass absorbable material, which is safe and has no side effect, and is an excellent choice for manufacturing medical devices implanted into the human body; the anvil pad 230 is made of a flexible thin material, and may be made of a non-woven fabric, a knitted fabric, a needle-punched fabric, a woven fabric, a film, a pressed sheet, or the like, and the anvil pad 230 made of a flexible material can slide out of the anvil slot 223 from the distal end 231 of the anvil pad after the pressure applied by the pressure applying arm 241 is released, so that the release of the distal end 231 of the anvil pad is realized, the problem that the distal end 231 of the anvil pad is difficult to release due to the fact that the anvil pad 230 made of a non-flexible material is solved, and the reliability of the release of the distal end 231 of the anvil pad is improved. In another embodiment, the anvil pad 230 can be made of one or more layers of the flexible material, alternatively, the anvil pad 230 can be made of two layers of the flexible material; furthermore, the thickness of the anvil pad 230 may be uniform or non-uniform, and in one embodiment, the thickness of the anvil pad 230 is non-uniform, the thickness of the proximal end of the anvil pad 230 is 1.5-3 times of the thickness of the distal end 231 of the anvil pad, and the strength of the proximal end of the anvil pad 230 can be improved by thickening the proximal end of the anvil pad 230, so that the problem that the proximal end of the anvil pad 230 is broken after the anvil fixing hole 233 is formed in the proximal end of the anvil pad 230 due to too low thickness of the anvil pad 230 is avoided, and the quality and reliability of the product are improved.

Referring to FIG. 17, FIG. 17 is a cross-sectional view of the anvil assembly 200 shown in FIG. 1, wherein the second resilient mount 240 is disposed in the second receiving space and adjacent to the distal end of the anvil assembly 200 for fixing the distal end 231 of the anvil pad; the second elastic fixing member 240 may be a pad spring, an elastic sheet, a cylindrical spring, or a torsion spring, which can be decomposed into an independent energy storage spring and a pressing structure, and under suitable installation position and operation condition, the first elastic fixing member 140 and the second elastic fixing member 240 can be replaced with each other. In one embodiment, the second elastic fixing member 240 may be made of metal material, such as copper, aluminum, etc., or made of plastic material, such as thermoplastic elastomer TPE, acrylic plastic PMMA, etc., and the energy storage material with elasticity is used to make the second elastic fixing member 240, so as to ensure the reliable fastening of the distal end 231 of the cutting board pad, and release the distal end 131 of the cutting board pad by deforming the energy storage elastic fixing member at the end of the movement of the cutting knife 310, which is not only safe and reliable, but also simple to operate.

In one embodiment, the second resilient mount 240 is a shim spring that includes a pressure applying arm 241 and a connecting end 242, wherein the connecting end 242 is connected to the anvil shell 210, and the pressure applying arm 241 is connected to the connecting end 242 and is used to secure the distal end 231 of the anvil shim. Specifically, the connecting end 242 is fixed on the anvil shell 210 by welding, riveting, bonding or fastening; in one embodiment, the connecting end 242 is fixed on the anvil shell 210 by welding, which can more firmly fix the connecting end 242 on the anvil shell 210, and when the pressure force applying arm 241 is deformed by an external force, the safety hazard caused by the fact that the distal end 231 of the anvil pad cannot be reliably released due to the insecure fixing of the connecting end 242 can be avoided.

Referring to fig. 18-20, fig. 18 is an enlarged view of the distal end of the anvil assembly 200 shown in fig. 1; FIG. 19 is an enlarged view of the proximal end of the anvil assembly 200 shown in FIG. 1; FIG. 20 is a schematic view of the anvil pad 230 shown in FIG. 2 undergoing deformation. In the process of the movement of the cutting blade 310, when the cutting blade 310 moves to the proximal end of the anvil assembly 200, the cutting blade mouth 312 starts to cut from the anvil pad auxiliary notch 234, and continues to cut the anvil pad auxiliary cutting line 232 after passing through the anvil fixing hole 233, and in the cutting process, the proximal end of the anvil pad 230 is deformed and moves to both sides, and then falls off from the fixing pin 250 to release the proximal end of the anvil pad 230. When the cutting knife 310 moves to the distal end of the staple cartridge assembly 200, the front protruding portion of the upper knife body 311 moves to the second elastic fixing member 240, the front protruding portion of the upper knife body 311 presses against the pressure applying arm 241 of the second elastic fixing member 240, so as to force the pressure applying arm 241 to deform and move away from the initial position (the dotted line position in fig. 20) toward the anvil shell 210, and the pressure applying arm itself deforms from the L of the initial position into a linear shape, thereby releasing the distal end 131 of the anvil pad.

In summary, in the present invention, the distal end of the anvil plate pad 230 and the distal end of the cartridge pad 130 are respectively inserted into the anvil slot 223 and the cartridge slot 123 for fastening, so that the distal end 231 of the anvil plate pad and the distal end 131 of the cartridge pad avoid the risk of flanging caused by scratching with tissue, and can naturally unfold according to the moving direction of the stapler jaw contacting with the tissue, thereby greatly reducing the risk of wrinkles after the jaw is closed, and further improving the quality of anastomosis between the anvil plate pad 230 and the cartridge pad 130 and the tissue. Meanwhile, the anvil plate pad 230 and the cartridge pad 130 have the same shape and size as the tissue contact surfaces of the attached cartridge magazine 120 and the anvil plate 220, and are slightly smaller, so that the risk of the pad edge being unnecessarily contacted with the tissue to cause folding or moving in use is avoided. In addition, the elastic pressing elements (the first elastic fixing element 140 and the second elastic fixing element 240) in the present embodiment are made of medical stainless steel material, and the connection manner between the nail magazine 120 and the anvil shell 210 does not add extra material, so that there is no biosafety risk caused by poor filtrate.

The distal end 231 of the anvil pad and the distal end 131 of the cartridge pad are positioned by compressing, and due to the reasonable design of the structure of the force applying arm (the force applying arm 141 of the first elastic fixing member 140 and the force applying arm 241 of the second elastic fixing member 240) of the compressed elastic element, the anvil pad 230 and the cartridge pad 130 obtain proper pre-pressure, and the pre-pressure of the compressed elastic element is not affected in the repeated clamping and resetting actions of the stapler jaws (the cartridge assembly 100 and the anvil assembly 200), thereby ensuring the reliable positioning of the anvil pad 230 and the cartridge pad 130 during the action.

Meanwhile, the fixing and releasing actions of the cutting board gasket far end 231 and the far end 131 of the nail bin gasket are implemented by the same element, so that the intermediate transmission link is reduced, the linkage releasing process is simplified, the reasonable design is carried out on the pressed position of the force applying arm of the elastic element, the force applying direction is a labor-saving lever, the direct acting force of a user is greatly reduced, the man-machine working efficiency of the system is improved, the releasing action is quicker and more labor-saving, and the reliability is higher.

On the other hand, since the nail pushing seat 260 does not reset with the cutting knife 310, it will remain at the distal end of the nail magazine 120 after the firing is completed, and always keep pushing against the force applying arm 141 of the first elastic fixing member 140; the force applying arm 241 of the second elastic fixing member 240 is plastically deformed by the protruding portion of the front end of the upper cutter body 311 of the cutting knife 310, and cannot be freely reset, so that after the cutting knife 310 is reset, the anvil plate gasket 230 and the cartridge gasket 130 are completely released.

In addition, the compressed elastic element in this embodiment does not change the overall dimensions of the stapler during the movement of positioning and releasing the anvil plate pad 230 and the cartridge pad 130, and there is no safety risk of secondary injury caused by the contact of part of the structure with the human tissue. The cutting board gasket 230 and the nail bin gasket 130 are fixed at corresponding positions of a jaw of the anastomat through the compression elastic element before use, a user can effectively use the instrument of the scheme only by using the existing standard anastomat, no additional operation procedure is needed, the learning time required by the use of a novel instrument is reduced, and the use is convenient and quick; the embodiment greatly uses the components of the existing standard anastomat, the process is mature and stable, the components of the gasket fastening system added by the anastomat are simple in structure and convenient and fast to assemble, the gasket fastening system can be produced in a large scale in a conventional processing mode, the overall process difficulty of the system is low, and the manufacturing cost is low.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A surgical stapler apparatus, characterized in that it comprises:

the nail bin box is provided with a nail bin gasket, the chopping board assembly is provided with a chopping board gasket, the driving assembly is provided with a cutting knife, and when the cutting knife moves from the near ends of the nail bin box and the chopping board assembly to the far ends of the nail bin box and the chopping board assembly, the nail bin gasket and the chopping board gasket are cut and separated from the nail bin box and the chopping board assembly respectively;

meanwhile, the magazine and the magazine assembly constitute a first accommodating space, a first guide path is formed on the magazine for the cutter to move from the proximal end of the magazine to the distal end of the magazine along the first guide path, and the magazine assembly further includes:

2. The stapler apparatus according to claim 1, wherein a cartridge slot is formed at a distal end of the cartridge magazine, and a distal end of the cartridge spacer is inserted into the first receiving space through the cartridge slot and fixed by the first elastic fixing member.

3. The stapler device according to claim 1, wherein a cartridge fixing hole is formed at a proximal end of the cartridge spacer, and the proximal end of the cartridge spacer is sleeved on the cartridge magazine cantilever through the cartridge fixing hole to fix the proximal end of the cartridge spacer.

4. The stapler device of claim 1, wherein the staple holder includes a staple holder body and a protruding structure having a length that is 1.2-5 times a length of the staple holder body.

5. The stapler apparatus of claim 1, wherein the anvil assembly comprises:

a chopping block housing;

6. The stapler apparatus of claim 5, wherein the second resilient retainer is a pad spring including a pressure applying arm and a connecting end, wherein the connecting end is connected to the anvil shell and the pressure applying arm is connected to the connecting end and is configured to retain a distal end of the anvil pad.

7. The stapler apparatus of claim 6, wherein the anvil body defines an anvil slot, and a distal end of the anvil pad is inserted into the second receiving space through the anvil slot and secured by the second resilient securing member.

8. The stapler apparatus according to claim 5, wherein the anvil pad has a proximal end opening with an anvil securing hole, the anvil pad having a proximal end fitting over the locating pin through the anvil securing hole to secure the anvil pad proximal end.

9. The stapler apparatus of claim 5, wherein the cutting knife comprises: go up cutter unit, lower cutter unit and cutting edge portion, wherein, cutting edge portion sets up between last cutter unit and the lower cutter unit, just the front end of going up cutter unit is provided with the bulge, works as the cutting knife moves to when the distal end of chopping block subassembly, the bulge of going up cutter unit conflicts second elastic fixing piece, in order to force second elastic fixing piece releases the distal end of chopping block gasket.