CN219207111U - Auxiliary sheet assembly and medical anastomat - Google Patents

Abstract

The utility model provides an auxiliary sheet assembly and a medical anastomat, wherein the auxiliary sheet assembly is arranged on a first jaw of the medical anastomat, the first jaw comprises a first surface facing to tissues during operation, and the auxiliary sheet assembly comprises: the support piece comprises two support arms and a connecting part which are oppositely arranged, the distal ends of the two support arms are connected through the connecting part, the proximal ends of the two support arms are separated from each other to form a proximal end opening, and the support piece is detachably fixed on the first clamping jaw; an auxiliary sheet detachably secured to the support member and at least partially covering the first surface of the first jaw. The auxiliary sheet can be conveniently arranged on the forceps holder of the medical anastomat, and the medical stapler has a stable structure and cannot fall off accidentally.

Description

Auxiliary sheet assembly and medical anastomat

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an auxiliary sheet assembly and a medical anastomat.

Background

In the prior art, the medical anastomat comprises an anastomat body, an operating handle movably connected with the anastomat body and a nail head part positioned at the distal end side of the anastomat body, wherein the nail head part comprises a nail bin and a nail anvil which are oppositely arranged. The stapler body includes a firing assembly. In the operation process, two sections of tissues to be anastomosed are clamped between an anvil and a nail bin of the anvil assembly, and then the percussion assembly is driven by the operating handle to enable the anastomoses to be molded on the anvil, so that anastomosis connection of the two sections of tissues is completed.

In the use process of the anastomat, various auxiliary sheets with different functions are required to be arranged on the opposite surfaces of the nail bin and/or the nail anvil, for example, the auxiliary sheets coated with anti-inflammatory medicines can be arranged on the opposite surfaces of the nail bin and/or the nail anvil, or the auxiliary sheets for reinforcing the anastomotic stoma can be arranged on the opposite surfaces of the nail bin and/or the nail anvil, or biological patches and the like can be arranged on the opposite surfaces of the nail bin and/or the nail anvil. However, the fixing structure of the existing auxiliary sheet is complex and inconvenient to install. Meanwhile, for the auxiliary sheet which is very soft, such as a biological patch, the auxiliary sheet is difficult to stably fix on the nail bin and/or the nail anvil due to the characteristics of the auxiliary sheet, and the auxiliary sheet can be accidentally dropped in the use process.

In the present utility model, the distal end side and the proximal end side are the proximal end side with respect to the operator, and the end closer to the operator, that is, the end closer to the surgical site is the distal end side.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model aims to provide an auxiliary sheet assembly and a medical anastomat, which can conveniently mount an auxiliary sheet on a jaw of the medical anastomat, and have stable structure and no accidental falling.

An embodiment of the present utility model provides an auxiliary sheet assembly, provided to a first jaw of a medical stapler, the first jaw including a first surface facing tissue at the time of surgery, the auxiliary sheet assembly comprising:

the support piece comprises two support arms and a connecting part which are oppositely arranged, the distal ends of the two support arms are connected through the connecting part, the proximal ends of the two support arms are separated from each other to form a proximal end opening, and the support piece is detachably fixed on the first clamping jaw;

an auxiliary sheet detachably secured to the support member and at least partially covering the first surface of the first jaw.

In some embodiments, the auxiliary sheet is a flexible auxiliary sheet, the auxiliary sheet comprising a first state not mounted to the support and a second state mounted to the support;

the auxiliary sheet is in the first state and the second state and is provided with a first width and a second width along the transverse direction respectively, and the first width is smaller than the second width; and/or the auxiliary sheet is in the first state and the second state and respectively has a first length and a second length along the axial direction, and the first length is smaller than the second length.

In some embodiments, the two support arms are at least partially located outside of the two sidewalls of the first jaw, respectively, when the support is mounted to the first jaw.

In some embodiments, at least one first mounting portion is respectively disposed on one surface of the two support arms, at least one second mounting portion is respectively disposed on two sides of the auxiliary sheet, and the second mounting portion is detachably mounted on the first mounting portion.

In some embodiments, the first mounting portion is a protrusion and the second mounting portion is a securing hole; or, the first mounting part is a groove, and the second mounting part is a protruding part.

In some embodiments, the first mounting portion is a protrusion, and a top outer diameter of the protrusion is greater than an inner diameter of the fixing hole.

In some embodiments, the first mounting portion is a groove, and the groove includes a first section and a second section in communication with each other, the first section having an axial dimension that is less than an axial dimension of the projection when undeformed, the projection passing through the first section into the second section.

In some embodiments, the two support arms are resilient arms that are spread apart outwardly by the first jaw when the support is mounted to the first jaw.

In some embodiments, the top surface of the support is not higher than the height of the first surface of the first jaw when the support is mounted to the first jaw.

In some embodiments, the connecting portion is at least partially snugly secured to the distal face of the first jaw when the support is mounted to the first jaw.

In some embodiments, the connecting portion is attached to the distal end face of the jaw by backing adhesive when the support is mounted to the first jaw.

In some embodiments, the connection is secured to the distal end of the first jaw by a snap connection or an insert when the support is mounted to the first jaw.

In some embodiments, the connecting portion includes a first mating portion and two second mating portions, the two second mating portions being located on two sides of the first mating portion and symmetrically disposed with respect to a centerline of the support, the first mating portion conforming to a first surface of the first jaw, the second mating portion conforming to a distal sidewall of the first jaw.

In some embodiments, the connecting portion includes a third mating portion and two fourth mating portions, the two fourth mating portions being located on two sides of the third mating portion and symmetrically disposed with respect to a center line of the support member, the third mating portion being attached to a first surface of the first jaw, and the fourth mating portion being attached to a second surface of the first jaw opposite to the first surface.

In some embodiments, the distal end of the connection portion is further distally extended with a protrusion disposed at an angle relative to the support arm and above the outer diameter envelope circle of the first jaw.

In some embodiments, the distal end of the protrusion is disposed blunt.

In some embodiments, the distal width of the protrusion is less than the proximal width; or the protruding part is arc-shaped, spherical or plane-shaped.

In some embodiments, the protrusion is angularly adjustable relative to the first jaw.

In some embodiments, the auxiliary sheet is provided with a plurality of through holes arranged along the length direction at the center position, and the through holes are arranged at intervals.

In some embodiments, the distal side of the auxiliary blade is provided with a distal opening extending in a length direction at a central position, and the cutter of the stapler enters at least partially into the distal opening when moving along the feed slot of the first jaw to the distal side of the first jaw.

In some embodiments, a notch is provided in a central location of the proximal side of the auxiliary panel.

In some embodiments, the medical stapler further comprises a second jaw, the secondary tab assembly being mounted to the first jaw and/or the second jaw, and the distance of the first jaw from the second jaw does not increase when the first jaw is in a closed state proximate to the second jaw.

The embodiment of the utility model also provides a medical anastomat, which comprises a first jaw, a second jaw and the auxiliary sheet assembly, wherein the auxiliary sheet at least partially covers the first surface of the first jaw.

The auxiliary sheet component and the medical anastomat provided by the utility model have the following advantages:

the utility model provides an auxiliary sheet component for a medical anastomat, which comprises a supporting piece and an auxiliary sheet, wherein the auxiliary sheet can be conveniently installed on a jaw of the medical anastomat through the supporting piece, the fixing structure of the auxiliary sheet after installation is stable and cannot accidentally fall off, and when the anastomat is triggered, the auxiliary sheet can be bound on tissues together with anastomat nails to play roles of strengthening an anastomotic stoma and/or assisting treatment and the like, meanwhile, the auxiliary sheet is separated from the supporting piece, and the supporting piece can be withdrawn from an operation position together with an anastomat body.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings.

FIG. 1 is a schematic illustration of the cooperation of a secondary panel assembly and a staple cartridge of a first embodiment of the present utility model;

FIG. 2 is an exploded view of the mating of the secondary panel assembly and the staple cartridge of the first embodiment of the present utility model;

FIG. 3 is a top view of a support member according to a first embodiment of the present utility model;

FIG. 4 is a top view of a secondary panel of a first embodiment of the utility model;

FIG. 5 is a top view of a proximal notch of a secondary panel according to a first embodiment of the present utility model;

FIG. 6 is a schematic structural view of a secondary panel assembly according to a second embodiment of the present utility model;

FIG. 7 is a schematic illustration of the fit of a secondary panel assembly according to a second embodiment of the utility model;

FIG. 8 is an enlarged view of FIG. 7 at A1;

FIG. 9 is a schematic structural view of a secondary panel assembly according to a third embodiment of the present utility model;

FIG. 10 is a schematic view of the fit of a secondary panel assembly according to a third embodiment of the present utility model;

FIG. 11 is a schematic view of a fourth embodiment of the present utility model with a buttress mated with a staple cartridge;

FIG. 12 is an enlarged view at A2 of FIG. 11;

FIG. 13 is a schematic view of a fifth embodiment of the present utility model with a buttress engaged with an anvil;

FIG. 14 is an exploded view of a fifth embodiment of the present utility model with a buttress engaged with an anvil;

FIG. 15 is a schematic view of a fifth embodiment of the present utility model with a buttress engaged with an anvil;

fig. 16 is an enlarged view at A3 in fig. 15.

Reference numerals:

1. staple cartridge 3122 second segment

11. Distal surface 32 attachment portion of staple cartridge

12. Side wall 321 first mating portion of staple cartridge

13. Second matching part of feed groove 322 of staple cartridge

2. Third matching part of nail anvil 323

21. Fourth mating portion of first surface 324 of anvil

22. Proximal opening of sidewall 33 of anvil

23. Auxiliary sheet of nail anvil feed groove 4

24. Distal side of second surface 41 auxiliary sheet of anvil

3. Distal opening of support 411

31. Proximal side of support arm 42 auxiliary sheet

311. Projection 421 notch

312. Groove 43 fixing hole

3121. First section 44 projection

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many 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 the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted. "or", "or" in the specification may each mean "and" or ". Although the terms "upper", "lower", "between", etc. may be used in this specification to describe various exemplary features and elements of the utility model, these terms are used herein for convenience only, e.g., in terms of the orientation of the examples depicted in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure in order to fall within the scope of the utility model. Although the terms "first" or "second" etc. may be used herein to describe certain features, these terms are merely intended to describe the same as used herein.

The utility model provides an auxiliary sheet assembly for a medical anastomat and the medical anastomat comprising the same. The medical anastomat comprises an anastomat body, an operating handle rotatably arranged on the anastomat body and a nail head part arranged at the far end of the anastomat body, wherein the nail head part comprises two oppositely arranged clamp clamps which are a nail bin and a nail anvil respectively. The auxiliary sheet assembly is arranged on a first jaw of the medical anastomat, and the first jaw comprises a first surface facing to tissues during operation. The first jaw is here either the cartridge or the anvil. The secondary sheet assembly includes: the support piece comprises two opposite supporting arms and a connecting part, the distal ends of the two supporting arms are connected through the connecting part, the proximal ends of the two supporting arms are separated from each other to form a proximal end opening, and the support piece is detachably fixed on the first clamping jaw; and the auxiliary piece is detachably fixed on the supporting piece. The auxiliary sheet can be conveniently installed on the first clamp of the medical anastomat through the supporting piece, the fixing structure of the auxiliary sheet is stable after the auxiliary sheet is installed, accidental falling does not occur, the auxiliary sheet at least partially covers the first surface of the first clamp, the auxiliary sheet can be bound on tissues together with the anastomat during the firing of the anastomat, the effects of strengthening an anastomotic stoma and/or assisting treatment are achieved, meanwhile, the auxiliary sheet is separated from the supporting piece, and the supporting piece can be withdrawn from an operation position together with the anastomat body.

The following describes the structure of the secondary panel assembly of various embodiments of the present utility model in detail with reference to the accompanying drawings, and it is to be understood that the various embodiments are not limiting of the scope of the present utility model.

Referring to fig. 1 to 5, there is shown a schematic structural view of an auxiliary sheet assembly for a medical stapler according to a first embodiment of the present utility model. The medical anastomat comprises an anastomat body, an operating handle rotatably arranged on the anastomat body and a nail head arranged at the far end of the anastomat body, wherein the nail head comprises two oppositely arranged clamp clamps which are a nail bin 1 and a nail anvil 2 respectively. The first clamp is a nail bin 1, the second clamp is a nail anvil 2, or the first clamp is a nail anvil 2, and the second clamp is a nail bin 1. The auxiliary sheet component is arranged on the nail bin 1 and/or the nail anvil 2. In the first embodiment, the auxiliary sheet assembly is provided in the staple cartridge 1. The auxiliary sheet assembly is mounted to the cartridge 1, and does not increase the distance between the cartridge 1 and the anvil 2 when the cartridge 1 and the anvil 2 are in a closed state in proximity to each other.

As shown in fig. 1 and 2, the cartridge 1 comprises a first surface facing tissue during operation, the first surface comprising a cartridge face and a distal face located distally of the cartridge face, the cartridge 1 further comprising an axially extending cartridge feed slot 13, and a cutter (not shown) of the stapler is at least partially fed into the cartridge feed slot 13 and is axially movable along the cartridge feed slot 13. The secondary panel assembly comprises a support 3 and a secondary panel 4. The support 3 comprises two support arms 31 and a connecting portion 32, the distal ends of the two support arms 31 being connected by the connecting portion 32, the proximal ends of the two support arms 31 being separated from each other to form a proximal opening 33. The support 3 is detachably fixed to the cartridge 1. The auxiliary sheet 4 is detachably fixed on the supporting piece 3, the auxiliary sheet 4 can be conveniently installed in the nail bin 1 of the medical anastomat through the supporting piece 3, and the fixing structure of the auxiliary sheet 4 after installation is stable and cannot fall off accidentally. The auxiliary sheet 4 at least partially covers the nail bin surface of the nail bin 1, namely covers the nail holes on the nail bin surface. When the anastomat is triggered, the auxiliary sheet 4 can be bound on tissues together with the anastomat nails to play roles in strengthening an anastomotic stoma and/or assisting treatment and the like, meanwhile, the auxiliary sheet 4 is separated from the supporting piece 3, and the supporting piece 3 can be withdrawn from an operation position together with the anastomat body.

In the present utility model, the distal end side and the proximal end side are the proximal end side with respect to the operator, the end closer to the operator, the end farther from the operator, i.e., the end closer to the operation position, are the distal end sides, and the direction along the axis of the stapler is the axial direction, i.e., the direction from the distal end side to the proximal end side of the stapler, or the direction from the proximal end side to the distal end side of the stapler. For example, in the view of fig. 1 and 2, the distal side is the left side and the proximal side is the right side for cartridge 1 and the distal side is the left side and the proximal side is the right side for buttress 3. The S1 direction is a direction from the proximal end side to the distal end side of the stapler, and defines the S1 direction or a direction opposite to the S1 direction as an axial direction of the stapling head, and also as a longitudinal direction of the supporting member 3, and defines the S2 direction or a direction opposite to the S2 direction in fig. 3 as a lateral direction of the stapling head, and also as a width direction of the supporting member 3, and defines the S3 direction or a direction opposite to the S3 direction in fig. 2 as a longitudinal direction of the stapling head, and also as a height direction of the supporting member 3. In the present utility model, the inner side and the outer side of one member are the inner side with respect to the axis of the member, and the outer side away from the axis.

In this embodiment, the auxiliary sheet 4 is a flexible auxiliary sheet 4, and may be an auxiliary sheet 4 coated with anti-inflammatory drugs, an auxiliary sheet 4 for supporting and reinforcing an anastomotic stoma, or a biological patch. The auxiliary sheet 4, when mounted to the support 3, has a transverse width and/or an axial length greater than the corresponding dimensions in the initial condition. Specifically, the auxiliary sheet 4 includes a first state of not being mounted to the support 3 and a second state of being mounted to the support 3. The auxiliary sheet 4 has a first width and a second width along the S3 direction when in the first state and the second state, respectively, and the first width is smaller than the second width; and/or, the auxiliary sheet 4 has a first length and a second length along the axial direction S1 when in the first state and the second state, respectively, and the first length is smaller than the second length. Therefore, when the auxiliary sheet 4 is mounted on the supporting piece 3, the auxiliary sheet can be completely unfolded, wrinkles are not easy to generate, and the auxiliary sheet can be better contacted with tissues. In one embodiment, the lateral distance of the proximal ends of the two support arms 31 is greater than the lateral distance of the distal ends of the two support arms 31, so that it is possible to realise that the lateral width of the auxiliary panel 4 after installation may be greater than the lateral width of the auxiliary panel 4 in the initial state.

As shown in fig. 1 and 2, in this embodiment, when the support member 3 is mounted on the staple cartridge 1, the distal end portion of the connecting portion 32 includes an extension portion, and the extension portion is at least partially attached to the distal end surface 11 of the staple cartridge 1, and the two support arms 31 are at least partially located outside the two side walls 12 of the staple cartridge 1, respectively. When the supporting piece 3 is installed in the nail bin 1, the top surface of the supporting piece 3 is not higher than the nail bin surface of the nail bin 1, so that the clamping force of the nail bin 1 to tissues and the nail discharge during the firing of the anastomat are prevented from being influenced. The top surface of the support 3 here refers to the upper surface of the support 3, i.e. the surface facing the anvil 2, in the view of fig. 2. The support arms 31 may be elastic arms, and when the support member 3 is mounted to the cartridge 1, the two support arms 31 are spread outward by the cartridge 1, so that the support member 3 can be better fixed to the cartridge 1. The utility model is not limited thereto and in other alternative embodiments the support arm 31 may be a rigid support arm 31. The portion of the extension portion of the connecting portion 32 attached to the distal end face 11 of the staple cartridge 1 may be provided with a back adhesive, so as to improve the stability of the cooperation between the connecting portion 32 and the staple cartridge 1. Alternatively, a concave-convex fitting structure may be provided between the extension portion of the connecting portion 32 and the distal end surface 11 of the cartridge 1. Concave-convex embedded matching structures can be added between the inner side wall of the supporting arm 31 and the side wall 12 of the nail bin 1, so that the matching stability of the supporting arm 31 and the side wall 12 of the nail bin 1 is enhanced.

In this embodiment, the top surfaces of the two support arms 31 are respectively provided with at least one first mounting portion, and two sides of the auxiliary sheet 4 are respectively provided with at least one second mounting portion, and the second mounting portions are detachably mounted on the first mounting portions. In other embodiments, the first mounting portion may be provided on other surfaces of the support arm 31. As shown in fig. 2 to 4, the first mounting portion is a protrusion 311, and the second mounting portion is a fixing hole 43. Preferably, the outer diameter of the top of the protrusion 311 is larger than the inner diameter of the fixing hole 43, so that the auxiliary sheet 4 is fixed on the support arm 31, thereby maintaining the stability of the auxiliary sheet 4 and avoiding accidental falling off of the anastomat before firing. When the auxiliary sheet assembly is mounted to the nail bin 1, the fixing holes 43 of the auxiliary sheet 4 can be firstly mounted on the protrusions 311 of the supporting arms 31, so that the auxiliary sheet 4 is fixed on the supporting arms 31, then the supporting pieces 3 are mounted on the nail bin 1, the connecting parts 32 are at least partially attached to the distal end face 11 of the nail bin 1, and the two supporting arms 31 are respectively positioned on the outer sides of the two side walls 12 of the nail bin 1, so that the auxiliary sheet assembly is mounted to the nail bin 1 together.

When the anastomat is triggered, the anastomat in the nail bin 1 can be driven to push out towards the direction of the nail anvil 2 by holding the operation handle and is sutured on the tissue, the auxiliary sheet 4 is stapled on the tissue together with the anastomat, the auxiliary sheet 4 is separated from the supporting piece 3, and the supporting piece 3 is still kept on the nail bin 1. While the cutter moves in the distal direction to cut the tissue and the auxiliary sheet 4 is cut from the middle. As shown in fig. 2 and 4, in this embodiment, the distal end side 41 of the auxiliary sheet 4 is provided with an elongated distal end opening 411 extending in the longitudinal direction at a central position, and when the cutter of the stapler moves to the distal end side of the cartridge 1 along the cartridge feed slot 13, the cutter at least partially enters the distal end opening 411, whereby the cutter can completely cut the auxiliary sheet 4 from the middle when the stapler is fired, so that the left and right halves of the auxiliary sheet 4 are completely separated from each other.

As shown in fig. 5, in this embodiment, a notch 421 may be further provided at the center of the proximal side 42 of the auxiliary sheet 4, so that the cutter may cut the auxiliary sheet 4 from the proximal end more smoothly when the stapler is fired. The notch 421 is preferably V-shaped as shown in fig. 5. And the center of the auxiliary sheet 4 is provided with a plurality of through holes 45 arranged in the length direction, the through holes 45 being spaced apart from each other. Reduce the resistance to the movement and cutting of the cutter and ensure that the cutter moves more smoothly towards the distal direction. The configuration of the secondary panel 4 shown in fig. 4 and 5 is merely exemplary, and in other alternative embodiments, one or more of the distal opening 411, the notch 421, and the through hole 45 may be provided, or none may be provided.

Fig. 6 to 8 are schematic structural views of an auxiliary sheet assembly according to a second embodiment of the present utility model. This embodiment differs from the first embodiment in that: the first mounting portion is a groove 312 formed on the top surface of the support arm 31, and the second mounting portion is a protrusion 44 formed on two sides of the auxiliary sheet 4. Mounting of the auxiliary sheet 4 on the support 3 can be achieved by mounting the projections 44 in the grooves 312. As shown in fig. 8, the groove 312 includes a first segment 3121 and a second segment 3122 that are connected to each other, the first segment 3121 is connected to the top surface of the support arm 31, the axial dimension of the first segment 3121 is smaller than the axial dimension of the protrusion 44 when not deformed, the protrusion 44 enters the second segment 3122 through the first segment 3121, the axial dimension of the second segment 3122 may be greater than or equal to the axial dimension of the protrusion 44 when not deformed, the protrusion 44 deforms when passing through the first segment 3121, returns to the original state after entering the second segment 3122, and is held in the groove 312. The axial dimension of the second segment 3122 may also be less than the axial dimension of the projection 44 when undeformed such that the projection 44 remains deformed when retained in the recess 312.

Fig. 9 and 10 are schematic structural views of a sub-sheet assembly according to a third embodiment of the present utility model. This embodiment differs from the second embodiment in that: the axial length of the connecting portion 32 of the third embodiment is smaller than that of the connecting portion 32 of the second embodiment. The shape of the connecting portion 32 is adapted to the shape of the distal end face of the anvil 2. The secondary panel assembly of this embodiment may be provided on the anvil 2.

As shown in fig. 11 and 12, a schematic view of the engagement of the supporting element 3 with the cartridge 1 according to the fourth embodiment of the present utility model is shown. The mating structure of the support 3 and the auxiliary sheet in this embodiment is the same as that of the first embodiment, and thus the auxiliary sheet is not shown. This embodiment differs from the first embodiment in the structure of the connecting portion 32 of the support 3. In this embodiment, the connecting portion 32 includes a first mating portion 321 and two second mating portions 322, where the two second mating portions 322 are located on two sides of the first mating portion 321 and symmetrically disposed with respect to a center line of the supporting member 3, the first mating portion 321 is attached to the distal end face 11 of the staple cartridge 1, and the second mating portion 322 is attached to a distal end sidewall of the staple cartridge 1. In this embodiment, the second mating portion 322 forms a snap-fit connection with the distal portion of the staple cartridge 1, thereby stably securing the connecting portion 32 to the distal end of the staple cartridge 1. The mating structure of the support member 3 and the auxiliary sheet in this embodiment may also employ the mating structure of the recess 312 and the projection 44 in the second embodiment described above.

Fig. 13 to 16 are schematic views showing the cooperation of the auxiliary sheet assembly and the anvil 2 according to the fifth embodiment of the present utility model. In this embodiment, the auxiliary sheet assembly is detachably fixed to the anvil 2. The anvil 2 comprises a first surface facing the cartridge 1 (operatively facing the tissue) and a second surface 22 opposite the first surface. The support 3 comprises two oppositely arranged support arms 31 and a connection 32 at the distal end of the support arms 31. The connecting portion 32 includes a third mating portion 323 and two fourth mating portions 324, the two fourth mating portions 324 are located at two sides of the third mating portion 323 and symmetrically disposed with respect to a center line of the support 3, and surfaces of the fourth mating portions 324 are inclined planes. When the supporting member 3 is mounted on the anvil 2, the third matching portion 323 is attached to the first surface of the anvil 2, and the fourth matching portion 324 is attached to the second surface 22 of the anvil 2 opposite to the first surface. A back glue may be disposed on a side of the third matching portion 323 facing the first surface 21 of the anvil 2, so as to improve the matching between the third matching portion 323 and the anvil 2. The concave-convex embedded structure may be further added between the third matching portion 323 and the first surface 21 of the anvil 2, so as to improve the matching stability between the connecting portion 32 and the distal end of the anvil 2. The mating structure of the support 3 and the auxiliary sheet in this embodiment is the same as that of the first embodiment. In other alternative embodiments, the mating structure of the supporting member 3 and the auxiliary sheet of this embodiment may also adopt the mating structure of the groove 312 and the protrusion 44 of the second embodiment. The top surface of the support 3 refers to the surface of the side facing the cartridge when the secondary plate assembly is mounted to the anvil 2. The top surface of the support 3 has a height not exceeding the highest height of the first surface of the anvil. In this embodiment, the distal side of the connecting portion 32 may be further provided with a protruding portion.

The center of the nail anvil 2 is also provided with an axially extending nail anvil feed groove, and the cutter at least partially enters the nail anvil feed groove and can axially move along the nail anvil 2 feed groove. The auxiliary sheet of this embodiment may adopt the auxiliary sheet 4 structure shown in fig. 4 or fig. 5. That is, the center of the distal end side 41 of the auxiliary sheet 4 is provided with an elongated distal end opening 411 extending in the longitudinal direction, and when the cutter of the stapler moves to the distal end side of the anvil 2 along the cartridge feed slot 13, the cutter at least partially enters the distal end opening 411, whereby, when the stapler is fired, the cutter can completely cut the auxiliary sheet 4 from the middle so that the left and right halves of the auxiliary sheet 4 are completely separated from each other.

In the above embodiment, further, the distal end of the connecting portion 32 is further provided with a protruding portion, which is disposed at an angle with respect to the supporting arm 31 and is higher than the outer diameter envelope circle of the cartridge 1/anvil 2. Optionally, the distal end of the protrusion is blunt to avoid damaging tissue. In this embodiment, the distal width of the protrusion is less than the proximal width. The protrusions may be arcuate, spherical or planar. Optionally, the angle of the protrusions relative to the cartridge 1/anvil 2 may be adjustable to meet different angular requirements. The protruding portion can play a role in picking up blood vessels and stripping tissues.

In practical application, the auxiliary sheet assembly can be arranged on the nail bin 1 of one anastomat, or the auxiliary sheet assembly can be arranged on the nail anvil 2 of one anastomat, or the auxiliary sheet assemblies are arranged on the nail bin 1 and the nail anvil 2, and the auxiliary sheets on the nail bin 1 and the nail anvil 2 can be similar auxiliary sheets or different auxiliary sheets. Preferably, the secondary plate assembly does not increase the distance between the staple cartridge 1 and the anvil 2 when the staple cartridge 1 and anvil 2 are in a closed state in proximity to each other.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (23)

1. An auxiliary blade assembly, for use with a first jaw of a medical stapler, the first jaw including a first surface that is operatively directed toward tissue, the auxiliary blade assembly comprising:

the support piece comprises two support arms and a connecting part which are oppositely arranged, the distal ends of the two support arms are connected through the connecting part, the proximal ends of the two support arms are separated from each other to form a proximal end opening, and the support piece is detachably fixed on the first clamping jaw;

an auxiliary sheet detachably secured to the support member and at least partially covering the first surface of the first jaw.

2. The flap assembly of claim 1 wherein the flap is a flexible flap, the flap including a first state not mounted to the support and a second state mounted to the support;

the auxiliary sheet is in the first state and the second state and is provided with a first width and a second width along the transverse direction respectively, and the first width is smaller than the second width; and/or the auxiliary sheet is in the first state and the second state and respectively has a first length and a second length along the axial direction, and the first length is smaller than the second length.

3. The auxiliary panel assembly of claim 1, wherein the two support arms are at least partially located outside of the two sidewalls of the first jaw, respectively, when the support member is mounted to the first jaw.

4. A secondary sheet assembly as claimed in claim 3 wherein a surface of the two support arms is provided with at least one first mounting portion respectively, and both sides of the secondary sheet are provided with at least one second mounting portion respectively, the second mounting portion being detachably mounted to the first mounting portion.

5. The secondary panel assembly of claim 4, wherein the first mounting portion is a projection and the second mounting portion is a securing hole; or, the first mounting part is a groove, and the second mounting part is a protruding part.

6. The secondary panel assembly of claim 5, wherein the first mounting portion is a protrusion and a top outer diameter of the protrusion is greater than an inner diameter of the securing hole.

7. The secondary optic assembly of claim 5, wherein the first mounting portion is a groove and the groove includes a first section and a second section in communication with each other, the first section having an axial dimension that is less than an axial dimension of the projection when undeformed, the projection passing through the first section into the second section.

8. The auxiliary blade assembly according to claim 3 wherein the two support arms are resilient arms and are spread apart by the first jaw when the support is mounted to the first jaw.

9. The auxiliary sheet assembly according to claim 3 wherein the top surface of the support member is not higher than the first surface of the first jaw when the support member is mounted to the first jaw.

10. A secondary optic assembly as claimed in claim 3 wherein the attachment portion is at least partially snugly secured to the distal face of the first jaw when the support member is mounted to the first jaw.

11. A secondary optic assembly as claimed in claim 3 wherein the attachment portion is attached to the distal end face of the jaw by backing adhesive when the support member is mounted to the first jaw.

12. A secondary blade assembly as claimed in claim 3, wherein the connection is secured to the distal end of the first jaw by a snap-fit connection or an insert arrangement when the support is mounted to the first jaw.

13. The auxiliary sheet assembly according to claim 1, wherein the connecting portion comprises a first mating portion and two second mating portions, the two second mating portions being located on both sides of the first mating portion and symmetrically disposed with respect to a center line of the support member, the first mating portion being attached to the first surface of the first jaw, the second mating portion being attached to the distal side wall of the first jaw.

14. The auxiliary sheet assembly according to claim 1, wherein the connecting portion includes a third mating portion and two fourth mating portions, the two fourth mating portions being located on both sides of the third mating portion and symmetrically disposed with respect to a center line of the support member, the third mating portion being attached to a first surface of the first jaw, the fourth mating portion being attached to a second surface of the first jaw opposite to the first surface.

15. The auxiliary sheet assembly of claim 1, wherein the distal end of the connecting portion is further distally extended with a protrusion disposed at an angle relative to the support arm and raised above the outer diameter envelope circle of the first jaw.

16. The secondary panel assembly of claim 15, wherein the distal end of the projection is blunt.

17. The secondary panel assembly of claim 16, wherein the distal width of the projection is less than the proximal width; or the protruding part is arc-shaped, spherical or plane-shaped.

18. The secondary panel assembly of claim 15, wherein the protrusion is angularly adjustable relative to the first jaw.

19. The secondary panel assembly of claim 1, wherein the secondary panel is provided at a central location thereof with a plurality of through holes aligned in a length direction, the through holes being spaced apart from each other.

20. The auxiliary sheet assembly according to claim 1, wherein a distal opening extending in a length direction is provided at a center position of a distal side of the auxiliary sheet, and wherein the cutter of the stapler is at least partially entered into the distal opening when the cutter moves to the distal side of the first jaw along the feed slot of the first jaw.

21. The secondary panel assembly of claim 20, wherein a notch is provided in a central location of the proximal side of the secondary panel.

22. The auxiliary blade assembly of claim 1, wherein the medical stapler further comprises a second jaw, the distance of the first jaw from the second jaw not increasing when the auxiliary blade assembly is mounted to the first jaw and/or the second jaw and when the first jaw is in a closed state proximate to the second jaw.

23. A medical stapler comprising a first jaw, a second jaw, and the auxiliary panel assembly of any one of claims 1-22, the auxiliary panel at least partially covering a first surface of the first jaw.

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