CN116138830A

CN116138830A - Circular tissue suturing device

Info

Publication number: CN116138830A
Application number: CN202310301648.1A
Authority: CN
Inventors: 陈亚; 吴永友; 彭巍; 邢春根; 赵奎; 李根发; 刘延俊
Original assignee: Suzhou Kafsman Medical Technology Co ltd
Current assignee: Suzhou Kafsman Medical Technology Co ltd
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-05-23
Also published as: WO2024197849A1

Abstract

The application relates to the technical field of medical instruments, in particular to a circular tissue suturing device, which comprises a nail bin assembly, a nail anvil assembly, a first tissue fixing piece and a second tissue fixing piece; the first tissue fixing piece is detachably connected with the nail bin assembly; the second tissue fixing piece is fixedly connected with the nail anvil component; the nail bin assembly is provided with a nail bin, and the first tissue fixing piece is arranged at the end side of the nail bin; in a state that the nail anvil assembly is matched with the nail bin assembly, the first tissue fixing piece and the second tissue fixing piece are arranged between the nail anvil assembly and the nail bin assembly; according to the surgical stapling device, the first tissue fixing piece and the staple cartridge assembly are connected in a separable mode, connection reliability of the first tissue fixing piece and the staple cartridge assembly before surgery is guaranteed, under the matched state of the staple anvil assembly and the staple cartridge assembly, the staples sequentially penetrate through the first tissue fixing piece and the second tissue fixing piece and are fixedly connected with the first tissue fixing piece and the second tissue fixing piece, and therefore connection strength of a anastomotic stoma is improved, and surgical risk of tearing of the anastomotic stoma is reduced.

Description

Circular tissue suturing device

Technical Field

The application relates to the technical field of medical instruments, in particular to a circular tissue suturing device.

Background

The circular tissue suturing device is a common tool in operation, a reinforcing gasket is sleeved and fixed in an anastomat in advance before suturing in order to improve the connection strength of an anastomat, a connecting wire and an elastic sheet are arranged in the prior circular suturing device for realizing gasket fixation, the reinforcing gasket is tightly attached to a nail bin of the anastomat by the elastic sheet, and the reinforcing gasket and the elastic sheet are pre-sutured through the connecting wire; before the anastomosis, the reinforcing gasket and the elastic sheet are separated in a mode of pulling the connecting wire, and the elastic sheet is pulled out of the body, so that the reinforcing gasket is fixed on the anastomosis opening. However, the elastic sheet is inconvenient to detach in the operation, so that the problem of tearing the anastomotic stoma is caused in the process of extracting the anastomotic device after anastomosis.

In order to solve the problems with the prior art described above, the present application provides an improved circular tissue suturing device.

Disclosure of Invention

In order to solve the above-described problems with the prior art, the present application provides a circular tissue stapling device comprising a cartridge assembly, an anvil assembly, a first tissue anchor and a second tissue anchor; the first tissue fixing piece is detachably connected with the nail bin assembly; the second tissue fixing piece is fixedly connected with the nail anvil assembly; the first tissue fixing piece is arranged at the end side of the nail bin; in the state that the nail anvil assembly is matched with the nail bin assembly, the first tissue fixing piece and the second tissue fixing piece are arranged between the nail anvil assembly and the nail bin assembly, and the first tissue fixing piece and the second tissue fixing piece are fixedly connected through the anastomat.

Further, the cartridge assembly includes a cartridge; the nail bin is provided with a nail outlet part; at least one limiting groove is formed in the nail outlet part; the first tissue fixing piece is fixedly connected to the limiting groove.

Further, the first tissue securing member is fixedly coupled to the cartridge assembly.

Further, the first tissue fixing piece is provided with at least one first dividing fracture structure, and the second tissue fixing piece is provided with at least one second dividing fracture structure; and in a state that the nail anvil assembly is anastomosed and connected with the nail bin assembly, the position of the first dividing fracture structure is opposite to that of the second dividing fracture structure.

Further, the first dividing fracture structure is identical to the second dividing fracture structure.

Further, the first tissue fixing member is further provided with a reinforcing portion, and the reinforcing portion protrudes toward one side away from the anvil assembly.

Further, the cartridge assembly further comprises an ejector; the nail bin is provided with an ejector assembly groove; the ejector is mounted in the ejector mounting groove.

Further, a plurality of anastomotic staple pushing blocks which are arranged in a circumferential direction are arranged on the ejector; the anastomotic nail accommodating bin is arranged at the pushing end of the anastomotic nail pushing block; the nail discharging part is also provided with a plurality of nail discharging openings, and the nail discharging openings correspond to the positions of the anastomotic nail pushing-out blocks one by one.

Further, a gasket pushing block is further arranged on the ejector, and the ejector can drive the gasket pushing block to move along the pushing direction of the anastomat relative to the nail bin; the first tissue securing member is separable from the cartridge assembly under the urging of the spacer-pushing block.

Further, the gasket push-out block is arranged in the limiting groove.

Further, the nail bin assembly further comprises an annular cutter, a cutter mounting groove is further formed in the nail bin, and the annular cutter is mounted in the cutter mounting groove.

Further, the circular tissue suturing device further comprises an operating mechanism which is in transmission connection with the ejector; the operating mechanism can drive the ejector to move so that the anastomotic pushing block can reciprocate between a preset pushing position and a preset shrinking position.

Further, the annular cutting knife is in transmission connection with the operating mechanism; the operating mechanism can drive the annular cutter to reciprocate in the cutting direction.

Further, the operating mechanism can be in transmission connection with the nail anvil assembly; the operating mechanism can drive the nail anvil assembly to move relative to the nail bin assembly along the axial direction until the nail anvil assembly and the nail bin assembly reach an anastomotic state; the operating mechanism can drive the nail anvil assembly to move along the axial direction in cooperation with the nail bin assembly.

Further, a connecting rod is also arranged on the nail anvil component; one end of the connecting rod is fixed at the bottom of the annular inner cavity, and the other end of the connecting rod is in transmission connection with the operating mechanism.

The circular tissue suturing device provided by the application has the following beneficial effects:

1. this application has guaranteed the connection reliability of first tissue mounting and nail storehouse subassembly before the art through being connected first tissue mounting and nail storehouse subassembly detachable, under nail anvil subassembly and nail storehouse subassembly complex state, the anastomat can be with first tissue mounting fixed connection on the tissue, and then improves the joint strength of anastomat, fills the space between anastomat and tissue through first tissue mounting simultaneously to reduce the phenomenon that the anastomat oozes blood, oozes liquid and anastomat was torn, and then reduce the emergence of postoperative complication, thereby improved the success rate of operation.

2. This application has avoided the risk that preoperative second tissue mounting breaks away from with the nail anvil subassembly through with second tissue mounting and nail anvil subassembly fixed connection to second tissue mounting sets up in the end side of nail anvil subassembly, and second tissue mounting sets up towards first tissue mounting, under nail anvil subassembly and nail storehouse subassembly complex state, the staple can fix first tissue mounting and second tissue mounting on the tissue of anastomat department, and then can improve the joint strength of anastomat department, thereby reduce the phenomenon that the anastomat was torn, pack the space between staple and tissue through first tissue mounting and second tissue mounting again, avoided the risk of anastomat department oozing blood and oozing liquid, reduce the complication, thereby reduce the operation risk.

3. According to the surgical operation device, the first tissue fixing piece is provided with the at least one first division fracture structure, the second tissue fixing piece is provided with the at least one second division fracture structure, the position of the first division fracture structure is opposite to the position of the second division fracture structure in the state that the nail anvil assembly is anastomotic-connected with the nail bin assembly, the position of the first division fracture structure is opposite to the position of the second division fracture structure, the anastomotic opening can be expanded to a certain extent under the action of the tension of the tissue on the basis of reinforcing the tissue, so that the nail anvil assembly is taken out from the anastomotic opening conveniently, the risk of tearing the anastomotic opening in the process of the nail anvil assembly is avoided, and the surgical success rate is improved.

4. Through setting up the first fracture structure that cuts apart with second fracture structure the same to under the state that nail anvil subassembly and nail storehouse subassembly coincide and be connected, the position of first fracture structure that cuts apart is relative with the position of second fracture structure, can guarantee the seam mouth under the effect of tissue tension, the size and the uniformity of direction of first tissue mounting and second tissue mounting follow corresponding first fracture structure and second fracture structure department separation, and then guaranteed the uniformity of separation volume in first fracture structure and second fracture structure department, avoided the risk that the anastomotic stoma that leads to because first tissue mounting and second tissue mounting dislocation separation torn, thereby improved the success rate of operation.

5. The utility model provides a first tissue mounting still includes to deviating from the convex reinforcement portion in one side of nail portion, and the terminal side of first segmentation fracture meets with reinforcement portion, through reinforcement portion on the first tissue mounting, can restrict the expansion degree of anastomotic stoma under the action of tissue tension, and then has improved the joint strength of first tissue mounting self to strengthened the joint strength of anastomotic stoma, avoided the risk that the anastomotic stoma was torn, thereby improved the success rate of operation.

6. Through being provided with at least one spacing recess on the play nail portion of nail storehouse in this application, first tissue mounting fixed connection is on spacing recess to improved the stability of fixed connection of first tissue mounting and nail storehouse, prevented that the first tissue mounting of art from being connected unreliable with the nail storehouse, the phenomenon that drops from the nail storehouse, thereby improved the tissue reinforcement effect of first tissue mounting to the anastomat, thereby reduce the oozing of anastomat, the condition of oozing liquid, improve the success rate of operation, reduce the complication.

7. In the application, through being provided with a plurality of anastomat ejecting blocks that arrange in the circumference on the ejector, the setting of anastomat holding storehouse is provided with a plurality of nail mouths in ejecting end of anastomat ejecting block, goes out still to be provided with a plurality of nail mouths on the nail portion, goes out the position one-to-one of nail mouth and anastomat ejecting block, under the state that nail anvil subassembly and nail storehouse subassembly coincide and be connected, a plurality of anastomat ejecting block can be with a plurality of anastomat from the nail mouth ejecting simultaneously, and then has realized the sewing up to the anastomat through the butt of anastomat and nail anvil subassembly.

8. Through set up the gasket on the ejector in this application and release the piece, the ejector can drive the gasket and release the piece and release the direction motion along the staple for the staple, under the promotion of piece is released to the gasket, first tissue mounting can be smooth separate from the staple storehouse subassembly, avoided first tissue mounting and staple storehouse subassembly to separate badly, the staple that leads to tears the destruction to first tissue mounting, and then improved the roughness of first tissue mounting and tissue laminating, thereby with first tissue mounting and tissue fixed connection through the staple, the reinforcement effect of first tissue mounting to the tissue has been improved.

Drawings

In order to more clearly illustrate the technical solutions and advantages of embodiments of the present application or of the prior art, the following description will briefly introduce the drawings that are required to be used in the embodiments or the prior art descriptions, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of an overall structure of a circular tissue suturing device in accordance with an embodiment of the present application;

FIG. 2 is a cross-sectional view of the overall structure of another circular tissue suturing device provided in accordance with an embodiment of the present application;

FIG. 3 is an exploded view of the overall structure of a circular tissue suturing device according to an embodiment of the present application;

fig. 4 is a schematic structural view of an ejector staple block and a shim ejector block according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural view of a staple cartridge assembly provided in an embodiment of the present application;

FIG. 6 is a cross-sectional view of a staple cartridge assembly provided in an embodiment of the present application;

FIG. 7 is a schematic view of a first tissue fastener according to an embodiment of the present disclosure;

FIG. 8 is a schematic view of another first tissue fastener according to an embodiment of the present disclosure;

FIG. 9 is a schematic illustration of a second tissue fastener according to an embodiment of the present disclosure in a separated state;

FIG. 10 is a schematic view of the overall structure of the ejector according to the embodiment of the present disclosure;

FIG. 11 is a schematic view of the structure of a staple cartridge provided in an embodiment of the present application;

FIG. 12 is a cross-sectional view of the overall structure of an anvil assembly provided in an embodiment of the present application;

fig. 13 is a schematic structural view of an annular anvil according to an embodiment of the present application;

FIG. 14 is an enlarged view of part of A in the annular anvil structure provided in the embodiments of the present application;

Fig. 15 is a schematic view of a limiting groove structure provided in an embodiment of the present application;

fig. 16 is a schematic view of another limiting groove structure provided in an embodiment of the present application;

fig. 17 is a schematic structural diagram of a pad push-out block according to an embodiment of the present disclosure;

FIG. 18 is a schematic view of another gasket push-out block according to an embodiment of the present disclosure;

fig. 19 is a schematic view of another limiting groove structure provided in an embodiment of the present application;

fig. 20 is a schematic structural diagram of a cooperation between a limiting groove and a pad push-out block according to an embodiment of the present disclosure;

wherein, the reference numerals in the figures correspond to:

1-nail cartridge assembly, 2-nail anvil assembly, 3-first tissue fixing piece, 4-second tissue fixing piece, 5-annular cutter, 11-nail cartridge, 12-ejector, 13-cutter mounting groove, 21-connecting rod, 22-nail anvil body, 23-fixing piece, 24-annular cutter anvil, 31-first dividing fracture structure, 32-reinforcing part, 41-second dividing fracture structure, 42-gasket body, 43-connecting part, 111-limit groove, 112-nail outlet, 121-nail pushing block, 122-gasket pushing block, 123-nail accommodating bin, 221-fixing piece matching hole, 222-nail anvil abutting surface, 223-cutter accommodating groove, 241-concave cavity structure, 242-connecting hole, 243-abutting block, 1111-limit bulge, 1221-limit structure and 2221-nail pushing groove.

Detailed Description

In order to better understand the technical solutions in the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.

Embodiments are described below with reference to the accompanying drawings, which do not limit the application content of the claims.

The present specification provides method operational steps as an example or a flowchart, but may include more or fewer operational steps based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one way of performing the order of steps and does not represent a unique order of execution.

1-20, a circular tissue stapling device provided in this embodiment includes a cartridge assembly 1, an anvil assembly 2, a first tissue fastener 3, and a second tissue fastener 4; the first tissue fixing piece 3 is detachably connected with the nail bin assembly 1; the second tissue fixing piece 4 is fixedly connected with the nail anvil assembly 2; the nail bin assembly 1 is provided with a nail bin 11, a plurality of anastomotic nail containing bins 123 matched with anastomotic nails are arranged in the nail bin 11, and the first tissue fixing piece 3 is arranged at the end side of the nail bin 11; in the state that the nail anvil assembly 2 is matched with the nail bin assembly 1, the first tissue fixing piece 3 and the second tissue fixing piece 4 are arranged between the nail anvil assembly 2 and the nail bin assembly 1, and the first tissue fixing piece 3 and the second tissue fixing piece 4 are fixedly connected through the anastomat.

Specifically, the first tissue fixation member 3 may be a ring-like structure.

Specifically, the inner diameter of the first tissue fixation member 3 is sized and shaped to conform to the inner diameter of the cartridge assembly 1.

So, in this embodiment, through with first tissue mounting 3 and the separable connection of nail storehouse subassembly 1, guaranteed the connection reliability of preoperative first tissue mounting 3 and nail storehouse subassembly 1, under nail anvil subassembly 2 and the complex state of nail storehouse subassembly 1, the staple can be with first tissue mounting 3 fixed connection on the tissue, and then improve the joint strength of anastomat, pack the space between staple and tissue through first tissue mounting 3 simultaneously, thereby reduce the phenomenon that the anastomat oozes blood, oozes liquid and anastomat is torn, and then reduce postoperative complication's emergence, thereby improved the success rate of operation.

Further, according to the measurement method: GB/T451.3-2002, the thickness of the first tissue anchor 3 is selected to be 0.02-1.6mm, preferably the thickness of the first tissue anchor 3 is selected to be 0.05-1mm.

Specifically, the surface smoothness of the first tissue fixation member 3 is 0.2 to 70S, preferably 1 to 30S; the first tissue fastener 3 has a bending stiffness of 0.02-7mn x m, preferably the first tissue fastener 3 has a bending stiffness of 0.04-1mn x m, the first tissue fastener 3 has a permeability of 0.2-300 μm/(pa·s), preferably the first tissue fastener 3 has a permeability of 1-200 μm/(pa·s), and the first tissue fastener 3 has a tensile strength of 0.02-22KN/m; preferably, the tensile strength of the first tissue fastener 3 is 0.1-5KN/m; the first tissue fixation member 3 has an elongation at break of 2% to 220%, preferably the first tissue fixation member 3 has an elongation at break of 10% to 150%.

Further, the first tissue anchor 3 is preferably a synthetic material of Polyglycolide (PLGA) or Polyglycolide (PGA).

In some embodiments, the circular tissue stapling device further comprises a second tissue anchor 4, the second tissue anchor 4 being disposed on an end side of the anvil assembly 2, the second tissue anchor 4 being disposed toward the first tissue anchor 3; the second tissue fixing element 4 is fixedly connected with the nail anvil assembly 2.

In particular, the second tissue fixation member 4 may be a ring-like structure.

Specifically, the material of the second tissue fixing element 4 is preferably a synthetic material of Polyglycolide (PLGA) or Polyglycolide (PGA), and preferably, the material of the second tissue fixing element 4 is the same as that of the first tissue fixing element 3.

Specifically, the thickness of the second tissue anchor 4 is selected to be 0.02-1.6mm, preferably, the thickness of the second tissue anchor 4 is selected to be 0.05-1mm.

Preferably, the second tissue anchor 4 is provided with the same thickness as the first tissue anchor 3.

Specifically, the performance parameters of the second tissue anchor 4 are: the surface smoothness of the second tissue fixation member 4 is 0.2-70S, preferably the surface smoothness of the second tissue fixation member 4 is 1-30S; the bending stiffness of the second tissue fastener 4 is 0.02-7mn x m, preferably the bending stiffness of the second tissue fastener 4 is 0.04-1mn x m, the air permeability of the second tissue fastener 4 is 0.2-300 μm/(pa·s), preferably the air permeability of the second tissue fastener 4 is 1-200 μm/(pa·s), the tensile strength of the second tissue fastener 4 is 0.02-22KN/m; preferably, the second tissue fixation member 4 has a tensile strength of 0.1-5KN/m; the elongation at break of the second tissue fixation member 4 is 2% to 220%, preferably the elongation at break of the second tissue fixation member 4 is 10% to 150%.

Preferably, the performance parameters of the second tissue fixation member 4 are set the same as the performance parameters of the first tissue fixation member 3.

Specifically, the anvil assembly 2 includes an anvil body 22 and at least one fixing member 23, at least one fixing member fitting hole 221 is provided on a sidewall of the anvil body 22, one end of the fixing member 23 can penetrate through the fixing member fitting hole 221, and the other end of the fixing member 23 is provided outside the anvil body 22.

Specifically, at least one end of the fixation member 23 extends toward the second tissue fixation member 4 and is fixedly attached to the second tissue fixation member 4.

Preferably, both ends of the fixing member 23 extend toward the second tissue fixing member 4 and are fixedly connected to the second tissue fixing member 4, respectively.

Specifically, the anvil body 22 is provided with an anvil abutment surface 222, one side of the second tissue fixing member 4 is provided with a tissue abutment surface and an abutment surface opposite to the tissue contact surface, and in a state in which the fixing member 23 is fixedly connected to the second tissue fixing member 4, the abutment surface of the second tissue fixing member 4 is attached to the anvil abutment surface 222.

In this embodiment, through with second tissue fixation spare 4 and anvil subassembly 2 fixed connection, avoided the risk that preoperative second tissue fixation spare 4 breaks away from with anvil subassembly 2, and second tissue fixation spare 4 sets up in the end side of anvil subassembly 2, second tissue fixation spare 4 sets up towards first tissue fixation spare 3, under anvil subassembly 2 and the complex state of nail storehouse subassembly 1, the anastomat can be fixed first tissue fixation spare 3 and second tissue fixation spare 4 on the tissue of anastomotic stoma department, and then can improve the joint strength of anastomotic stoma, thereby reduce the phenomenon that the anastomotic stoma tears, pack between anastomotic nail and tissue through first tissue fixation spare 3 and second tissue fixation spare 4 again.

In other embodiments, the anvil assembly 2 includes a plurality of fixing members 23, and a plurality of fixing member engaging holes 221 are formed on a sidewall of the anvil body 22, where the plurality of fixing members 23 are in one-to-one correspondence with the plurality of fixing member engaging holes 221.

Further, the fixing element 23 and the second tissue fixing element 4 may be integrally and fixedly connected by stitching, gluing, or ultrasonic technology.

Further, the fixing member 23 may be made of biological materials such as pericardial matrix, dermal matrix, small intestine submucosa matrix except antigen, or synthetic materials such as Polylactide (PLA), polyglycolide (PLGA), polyglycolide (PGA), polycaprolactone (PCL), polydioxanone (PDO), etc., or absorbable suture of different materials such as polyglycolide monofilament, coated multi-strand polyglycolide suture, catgut, etc., preferably the same material as the second tissue fixing member 4.

Specifically, the width of the fixing member 23 ranges from 0.03 to 120mm, and preferably, the width of the fixing member 23 ranges from 0.1 to 50mm; the thickness of the fixing member 23 ranges from 0.02 to 1.6mm, and preferably the thickness of the fixing member 23 ranges from 0.05 to 1mm.

Specifically, the width of the fixing member 23 is smaller than the width of the side wall fixing member fitting hole 221 of the anvil body 22, smaller than the width of the connecting hole 242 on the annular anvil 24, the thickness of the fixing member 23 is smaller than the thickness of the fixing member fitting hole 221, and the thickness of the fixing member 23 is smaller than the thickness of the connecting hole 242.

In this embodiment, the plurality of fixing members 23 sequentially penetrate through the corresponding fixing member matching holes 221 and then are fixedly connected with the second tissue fixing member 4, so that the connection strength of the second tissue fixing member 4 and the anvil body 22 is improved, the flatness of the abutting surface of the second tissue fixing member 4 and the abutting surface 222 of the anvil are further improved, and the suture connection strength of the anastomotic stoma is further improved.

In a preferred embodiment, the anvil assembly 2 includes four fixing members 23, and four fixing member engaging holes 221 are formed in the side wall of the anvil body 22, and the four fixing member engaging holes 221 are equally distributed along the circumferential direction of the side wall of the anvil body 22.

Specifically, the binding force of the fixed connection of the fixing member 23 to the second tissue fixing member 4 is required to be more than 0.2N, and preferably, the binding force of the fixed connection of the fixing member 23 to the second tissue fixing member 4 is required to be more than 0.5N.

In some embodiments, the y/T1797-2021 whipping test method may be selected by a binding force qualitative detection method, and requires that the second tissue fastener 4 be tightly attached to the anvil abutment surface 222 of the anvil assembly 2, not separated from the anvil assembly 2, and that the second tissue fastener 4 be free of tilting.

Specifically, the method for quantitatively detecting the binding force may be that the second tissue fixing member 4 to be detected is fixed on the table surface of the detection table, the fixing member 23 is pulled by using the micro-hook of the tensile strength meter, and pulled up along the direction perpendicular to the detection table surface at a speed of 1mm/min until at least one of the second tissue fixing members 4 is separated from the binding point of the fixing member 23, and the maximum value is recorded, wherein the maximum value is the binding force of the fixed point.

In some embodiments, the first tissue anchor 3 has at least one first dividing fracture structure 31 provided thereon and the second tissue anchor 4 has at least one second dividing fracture structure 41 provided thereon; in a state where the anvil assembly 2 is anastomosed to the cartridge assembly 1, the first dividing slit structure 31 is positioned opposite to the second dividing slit structure 41.

Specifically, the first tissue fixing member 3 may be provided with a plurality of first dividing fracture structures 31, and the plurality of first dividing fracture structures 31 may be uniformly spaced apart in the circumferential direction of the first tissue fixing member 3.

Specifically, the second tissue fixing member 4 may be provided with a plurality of second dividing slit structures 41, and the plurality of second dividing slit structures 41 may be uniformly spaced apart in the circumferential direction of the second tissue fixing member 4.

Preferably, four first dividing and cutting structures 31 are provided on the first tissue fixing member 3, and four second dividing and cutting structures 41 may be provided on the second tissue fixing member 4, and the positions of the first dividing and cutting structures 31 are opposite to the positions of the second dividing and cutting structures 41.

Specifically, the first tissue fixing member 3 has a concentric circle structure, and the first dividing and breaking structure 31 may or may not penetrate through the outer circle of the first tissue fixing member 3 and the inner circle of the first tissue fixing member 3, and preferably, the first dividing and breaking structure 31 penetrates through the outer circle of the first tissue fixing member 3 and the inner circle of the first tissue fixing member 3.

Specifically, the first dividing and breaking structure 31 may be a break point type, a straight line type or a curved line type, and preferably, the first dividing and breaking structure 31 is a straight line type.

In this embodiment, by providing at least one first dividing and cutting structure 31 on the first tissue fixing member 3 and providing at least one second dividing and cutting structure 41 on the second tissue fixing member 4, in the state that the anvil assembly 2 is anastomosed with the cartridge assembly 1, the position of the first dividing and cutting structure 31 is opposite to the position of the second dividing and cutting structure 41, by opposite the position of the first dividing and cutting structure 31 to the position of the second dividing and cutting structure 41, a certain expansion amount of the anastomotic stoma under the action of the tension of the tissue can be ensured on the basis of reinforcing the tissue, thereby facilitating the removal of the anvil assembly 2 from the anastomotic stoma, further avoiding the risk of tearing the anastomotic stoma in the process of the anvil assembly 2, and improving the success rate of the operation.

Further, as shown in fig. 9, the second tissue fixing member 4 is in a separated state, the second tissue fixing member 4 includes a connecting portion 43 and a spacer body 42, at least one of an inner ring edge and an outer ring edge of the spacer body 42 is provided with the connecting portion 43, and the connecting portion 43 is disposed toward a side facing away from the first tissue fixing member 3.

Preferably, the inner and outer ring edges of the spacer body 42 are provided with a connecting portion 43, the connecting portion 43 being arranged towards the side facing away from the first tissue fixation member 3.

Specifically, the shape of the connection portion 43 may be a semicircle, a semi-ellipse, a triangle, a polygon, or an irregular shape.

Specifically, the second dividing structure 41 may or may not penetrate the outer ring of the second tissue fixing element 4 and the inner ring of the second tissue fixing element 4, and preferably, the second dividing structure 41 penetrates the outer ring of the second tissue fixing element 4 and the inner ring of the second tissue fixing element 4.

Specifically, the second dividing structure 41 may be a break point type, a straight line type or a curved line type, and preferably, the second dividing structure 41 is a straight line type.

In a preferred embodiment, the connecting portion 43 is provided at the second dividing slit structure 41 of the second tissue fixing member 4, and the connecting portion 43 connects the solid portions on both sides of the second tissue fixing member 4.

In some embodiments, the first split structure 31 is structurally identical to the second split structure 41.

Specifically, the first dividing and cutting structure 31 may be a break point type, a straight line type or a curved line type.

Preferably, the first split fracture structure 31 is rectilinear.

In this embodiment, by arranging the first dividing and cutting structure 31 and the second dividing and cutting structure 41 in the same structure, and in the state that the anvil assembly 2 is anastomosed and connected with the cartridge assembly 1, the position of the first dividing and cutting structure 31 is opposite to the position of the second dividing and cutting structure 41, the uniformity of the size and direction of separation of the first tissue fixing member 3 and the second tissue fixing member 4 from the corresponding first dividing and cutting structure 31 and second dividing and cutting structure 41 under the action of tissue tension can be ensured, and further, the uniformity of the separation amount at the first dividing and cutting structure 31 and the second dividing and cutting structure 41 is ensured, and the risk of tearing of the anastomotic opening caused by dislocation and separation of the first tissue fixing member 3 and the second tissue fixing member 4 is avoided, thereby improving the success rate of the operation.

In other embodiments, the first and

second split structures

31 and 41 may also be different.

In some embodiments, the first tissue fixation element 3 further comprises a reinforcement portion 32 protruding to a side facing away from the staple ejection portion; the end side of the first dividing and cutting structure 31 is in contact with the reinforcing portion 32.

Specifically, the reinforcing portion 32 may be a reinforcing ring structure, and in this application, the shape, size, and number of the reinforcing portion 32 are not limited.

Specifically, the first tissue fixing member 3 may have a concentric circle structure, and the outer diameter of the first tissue fixing member 3 may be identical to the outer diameter of the staple cartridge 11, or slightly smaller or slightly larger, and preferably, the outer diameter of the first tissue fixing member 3 is identical to the outer diameter of the staple cartridge 11.

Specifically, the inner diameter of the first tissue fixing element 3 may be in accordance with the inner diameter of the staple cartridge 11, or may be slightly smaller or slightly larger, and preferably, the inner diameter of the first tissue fixing element 3 is in accordance with the inner diameter of the staple cartridge 11.

Specifically, the outer and inner circumferential edges of the first tissue fixation member 3 are provided with reinforcing portions 32 at protrusions directed toward an alternative side away from the staple-out portion.

Preferably, a reinforcement 32 is provided at the outer circumferential edge of the first tissue anchor 3.

Preferably, as shown in fig. 8, the end side of the first dividing slit structure 31 extends to the inner circular edge of the first tissue fixation member 3, and the other end side of the first dividing slit structure 31 extends to the outer circular edge of the first tissue fixation member 3.

In this embodiment, the first tissue fixing member 3 further includes a reinforcing portion 32 protruding toward a side facing away from the nail-out portion, and the end side of the first split fracture structure 31 is connected with the reinforcing portion 32, and the degree of expansion of the anastomotic stoma under the action of tissue tension can be limited by the reinforcing portion 32 on the first tissue fixing member 3, so that the connection strength of the first tissue fixing member 3 is improved, the connection strength of the anastomotic stoma is enhanced, the risk of tearing the anastomotic stoma is avoided, and the success rate of surgery is improved.

In some embodiments, the first tissue anchor 3 is fixedly coupled to the cartridge assembly 1.

Specifically, the first tissue fixing element 3 and the cartridge assembly 1 may be fixedly connected through cold pressing, hot pressing, or ultrasonic processes.

In this embodiment, the first tissue fixing member 3 is fixedly connected to the cartridge assembly 1 by cold pressing technology, so that the fixing connection strength between the first tissue fixing member 3 and the cartridge assembly 1 can be improved, and meanwhile, the connection efficiency between the first tissue fixing member 3 and the cartridge assembly 1 can also be improved.

In some embodiments, cartridge assembly 1 comprises a cartridge 11; the nail bin 11 is provided with a nail outlet part; at least one limiting groove 111 is arranged on the nail outlet part; the first tissue fixation member 3 is fixedly attached to the limiting recess 111.

Specifically, a plurality of limit grooves 111 may be provided on the staple discharging portion, and preferably, the number of limit grooves 111 may be matched with the number of first dividing fracture structures 31 on the first tissue fixing member 3; the position of the limiting groove 111 may be matched to the position of the first split-fracture structure 31 on the first tissue fixation member 3.

In some embodiments, 4-16 limit grooves 111 may be disposed on the staple discharging portion, and the limit grooves 111 may be uniformly spaced along the circumferential direction of the staple discharging portion.

Preferably, in a state where the first tissue fixing member 3 is fixedly coupled with the limiting grooves 111, the positions of the limiting grooves 111 may be distributed near both end sides of each of the first division break structures 31.

Specifically, the circumference of the limit groove 111 is 0.15 to 110mm, and preferably, the circumference of the limit groove 111 is 0.3 to 20mm.

Specifically, the adhesion force of the first tissue fixing member 3 connected with the limiting groove 111 is greater than 0.2N, and preferably, the adhesion force of the first tissue fixing member 3 connected with the cartridge assembly 1 is greater than 1N and less than or equal to 100N.

Further, the method for detecting the adhesion force of the first tissue fixing element 3 connected with the cartridge assembly 1 can be a qualitative detection method of the adhesion force or a quantitative detection method of the adhesion force.

Specifically, the qualitative detection method of the adhesive force can be selected from a YY/T1797-2021 swing test method, and the first tissue fixing piece 3 is required to be fixedly connected with the nail bin assembly 1 without separation, and the first tissue fixing piece 3 has no tilting.

The adhesive force quantitative detection method can be as follows: the planar dimensions of the first tissue anchor 3 are: the outer diameter 26mm and the inner diameter 17mm, the detection tool plane size is 150 x 150mm for the example to explain:

the lower surface of the fixture is a working surface, the working surface is smooth, the upper surface of the fixture is provided with a hanging ring, the self weight of the fixture is 500g (the gravity is 4.9N), the upper plane of the first tissue fixing piece 3 is bonded with the working surface of the detection fixture by using 3M double faced adhesive tape or glue, after the fixture is kept stand for 30 minutes, the fixture is used for fixing the nail bin assembly 1, the fixture hanging ring is pulled upwards and vertically by a tensile strength meter at the speed of 1mm/min until the first tissue fixing piece 3 is separated from the limiting groove 111, the numerical value when the first tissue fixing piece 3 is separated from the limiting groove 111 is recorded, the self gravity of the fixture is subtracted from the numerical value, the adhesive force of the first tissue fixing piece 3 and the limiting groove 111 is fixedly connected, and the adhesive force at any fixed connection point is required to be more than 1N and less than or equal to 100N.

In this embodiment, through being provided with at least one spacing recess 111 on the play nail portion of nail storehouse 11, first tissue mounting 3 fixed connection is on spacing recess 111, thereby improved the stability of fixed connection of first tissue mounting 3 and nail storehouse 11, increased the fixed connection intensity of first tissue mounting 3 and nail storehouse 11, make the tight face of first tissue mounting 3 keep on nail storehouse 11, the phenomenon that first tissue mounting 3 is connected unreliable with nail storehouse 11 before having avoided the art, and drop from nail storehouse 11, thereby improved the tissue reinforcement effect of first tissue mounting 3 to the anastomotic stoma, thereby reduce the oozing blood, oozing liquid condition of anastomotic stoma, improve the success rate of operation, reduce the complication.

In some embodiments, the cartridge assembly 1 further comprises an ejector 12; the nail bin 11 is provided with an ejector assembly groove; the ejector 12 is mounted in the ejector mounting groove.

In some embodiments, ejector 12 is provided with a plurality of circumferentially arranged staple ejecting blocks 121; the staple accommodating bin 123 is provided at the push-out end of the staple push-out block 121; the nail outlet part is also provided with a plurality of nail outlet 112, and the positions of the nail outlet 112 and the anastomotic nail pushing block 121 are in one-to-one correspondence.

Specifically, the plurality of staple pushing blocks 121 are arranged at uniform intervals in the circumferential direction of the ejector 12.

Specifically, at least one coil of staple pushing blocks 121 are staggered in the circumferential direction of the ejector 12, and preferably, two coils of staple pushing blocks 121 are staggered in the circumferential direction of the ejector 12.

Further, the anvil abutting surface 222 on the anvil body 22 is provided with a staple abutting groove 2221 which is matched with the staples, and the staples are abutted with the staple abutting groove 2221 in a matched state of the cartridge assembly 1 and the anvil assembly 2, so that the effective deformation degree of the staples is improved, and the stapling quality of the staples is ensured.

The cross sections of the nail outlet 112 and the limiting groove 111 may or may not be identical in size, and preferably, the cross sections of the nail outlet 112 and the limiting groove 111 are identical in size.

In other embodiments, the staple outlet 112 may also be multiplexed to define the recess 111.

In the present embodiment, by providing the ejector 12 with the plurality of circumferentially arranged staple pushing blocks 121, the staple accommodating chamber 123 is provided at the pushing end of the staple pushing block 121, and the staple discharging portion is further provided with the plurality of staple discharging openings 112, the positions of the staple discharging openings 112 and the staple pushing blocks 121 are in one-to-one correspondence, and in the state that the anvil assembly 2 is anastomosed and connected with the staple cartridge assembly 1, the plurality of staple pushing blocks 121 can simultaneously push out the plurality of staples from the staple discharging openings 112, so that stapling of the staples is realized by abutment of the staples with the anvil assembly 2.

In some embodiments, the ejector 12 is further provided with a gasket pushing block 122, and the ejector 12 can drive the gasket pushing block 122 to move along the staple pushing direction relative to the staple cartridge 11; the first tissue fixation element 3 is separable from the cartridge assembly 1 under the urging of the spacer push-out block 122.

Specifically, the structure of the limit groove 111 may be as shown in fig. 15, and the structure of the pad push-out block 122 is matched with the limit groove 111.

Specifically, the pad pushing block 122 and the staple pushing block 121 may be integrated or may be separate. Preferably, the pad pushing block 122 and the staple pushing block 121 are integral.

The structures of the pad pushing block 122 and the staple pushing block 121 may be the same or different.

In other embodiments, staple ejection block 121 may be multiplexed as shim ejection block 122.

Further, the material of the pad pushing block 122 may be plastic or alloy, and preferably, the material of the pad pushing block 122 is plastic.

Specifically, the ejector 12 is provided with a plurality of pad pushing blocks 122, and the plurality of pad pushing blocks 122 are arranged at uniform intervals along the circumferential direction of the ejector 12, and preferably, 4 to 8 pad pushing blocks 122 are provided on the ejector 12.

Specifically, the surface of the pad push-out block 122 is smooth or sleek without spike, so that the pad push-out block 122 can be pushed out from the limit groove 111 smoothly.

Specifically, the thrust force required by the ejector 12 to move the pad ejector block 122 is not less than 0.1N, and preferably, the thrust force of the pad ejector block 122 is 1N or more.

For example, the method for detecting the thrust force of the ejector 12 driving the gasket ejector block 122 to move may be: the vertical rod is vertically inserted into the limit groove 111 by selecting 100g of the sum of the weights of the vertical rod and the vertical rod, and the anastomotic device is operated, and the gasket push-out block 122 can push the weights of the vertical rod and the vertical rod to be above the surface of the nail bin 11.

When the spacer pushing block 122 reaches the end stroke, the pushing end of the spacer pushing block 122 may be higher than the surface of the staple cartridge 11, may be flush with the surface of the staple cartridge 11, or may be lower than the surface of the staple cartridge 11, and preferably, the pushing end of the spacer pushing block 122 is higher than the surface of the staple cartridge 11.

In this embodiment, through being provided with gasket ejecting block 122 on ejector 12, ejector 12 can drive gasket ejecting block 122 and follow the staple ejecting direction motion for staple cartridge 11, under the promotion of gasket ejecting block 122, first tissue mounting 3 can be smooth follow the separation of staple cartridge subassembly 1, avoided first tissue mounting 3 and staple cartridge subassembly 1 to separate badly, the staple that leads to tears the destruction to first tissue mounting 3, and then improved the roughness that first tissue mounting 3 and tissue laminated to with first tissue mounting 3 and tissue fixed connection through the staple, and then improved the reinforcement effect of first tissue mounting 3 to the tissue.

In some embodiments, the pad ejection block 122 is disposed within the limit groove 111.

Specifically, the cross section of the limiting groove 111 is the same as or similar to the same layer cross section of the pad push-out block 122 in size and shape, and preferably, the circumference of the cross section of the limiting groove 111 is slightly smaller than the same layer cross section of the pad push-out block 122 in shape.

In this embodiment, by arranging the spacer pushing block 122 in the limiting groove 111, and arranging the structure of the limiting groove 111 to match with the pushing end of the spacer pushing block 122, it can be ensured that the first tissue fixing member 3 is separated from the staple cartridge assembly 1 under the pushing of the spacer pushing block 122, and meanwhile, the flatness and the connection effectiveness of the first tissue fixing member 3 and the tissue are prevented from being affected due to the overlong pushing stroke of the pushing block 122.

In some embodiments, the structure of the gasket pushing block 122 may be as shown in fig. 17, where the gasket pushing block 122 can be axially contracted along the pushing direction, and the structure of the limit groove 111 matched with the structure of the gasket pushing block 122 may be as shown in fig. 16, where the outlet of the limit groove 111 is also axially contracted along the pushing direction of the gasket pushing block 122.

Specifically, the structure of the limit groove 111 is matched with the pushing end of the gasket pushing block 122; if the spacer pushing block 122 axially contracts in the pushing direction, the pushing distance of the spacer pushing block 122 is limited by the engagement between the pushing end of the spacer pushing block 122 and the limiting groove 111 during the movement of the spacer pushing block 122 in the staple pushing direction relative to the staple cartridge 11.

In other embodiments, as shown in fig. 18, the structure of the pad pushing block 122 may also be that a limiting structure 1221 is provided on the pad pushing block 122, and a limiting groove 111 matched with the limiting structure is provided on the outlet of the limiting groove 111, as shown in fig. 19, and a limiting protrusion 1111 matched with the limiting structure 1221 is provided on the outlet of the limiting groove 111.

Specifically, during the movement of the pad push-out block 122 along the staple push-out direction, as shown in fig. 20, the pad push-out block 122 is schematically matched with the limiting groove 111, and the pad push-out block 122 is limited in push-out stroke by the limiting abutment of the limiting structure 1221 and the limiting protrusion 1111. The flatness and the connection effectiveness of the first tissue fixing element 3 and the tissue fit are prevented from being influenced by the overlong pushing-out travel of the pushing-out block 122 while the first tissue fixing element 3 is ensured to be separated from the nail bin assembly 1.

In some embodiments, as shown in fig. 10-11, the cartridge assembly 1 further includes an annular cutter 5, and the cartridge 11 further includes a cutter mounting slot 13, wherein the annular cutter 5 is mounted in the cutter mounting slot 13.

In this embodiment, through setting up cutting knife mounting groove 13 on nail storehouse 11, annular cutting knife 5 installs in cutting knife mounting groove 13, provides the accommodation space for annular cutting knife 5, and then has improved the stability of annular cutting knife 5 relative nail storehouse 11 motion.

Further, the second tissue fixing member 4 is further provided with a cutting section 43, and the cutting section 43 is provided on the cutting stroke of the annular cutter 5.

Specifically, the cutting section 43 may be a hole or a solid body, and the hole may be circular, elliptical, triangular, polygonal, or irregular, or may be hollow in a partial area or an entire area, preferably, the cutting section 43 is a hole, and the cutting area of the annular cutting knife 5 and the cutting section 43 is reduced by setting the cutting section 43 into a hole, so that the cutting force of the annular cutting knife 5 is reduced, and the annular cutting knife 5 is convenient to separate the second tissue fixing member 4 from the fixing member, thereby improving the cutting efficiency of the second tissue fixing member 4.

In other embodiments, as shown in fig. 13, the anvil assembly 2 further includes an annular cutter anvil 24, the anvil body 22 is provided with a cutter anvil accommodating groove 223, the annular cutter anvil 24 is fixedly connected in the cutter anvil accommodating groove 223, the annular cutter anvil 24 and the annular cutter 5 are correspondingly disposed, and the annular cutter 5 can be abutted against the annular cutter anvil 24 in a state that the anvil assembly 2 is matched with the cartridge assembly 1.

Specifically, as shown in fig. 13-14, the annular anvil 24 is provided with a concave cavity structure 241, and the annular anvil 24 is provided with a connecting hole 242 matching the fastener fitting hole 221 in the circumferential direction.

Specifically, the connecting holes 242 are uniformly spaced along the circumference of the annular anvil 24, and one end of the fixing member 23 sequentially penetrates through the fixing member fitting hole 221 and the connecting holes 242 and is fixedly connected with the second tissue reinforcing spacer 4.

In a state where the annular anvil 24 is fixedly connected to the anvil receiving groove 223, an opening end of the concave cavity structure 241 faces an inner wall of the anvil receiving groove 223, and a connection end of the concave cavity structure 241 faces the annular cutter 5, it is to be noted that the annular anvil 24 is disposed on a cutting path of the annular cutter 5.

Specifically, the connection end of the concave cavity structure 241 is provided with a knife anvil surface towards one side of the annular cutting knife 5, and the annular cutting knife 5 can be abutted with the knife anvil surface.

In this embodiment, under the state that nail anvil subassembly 2 and nail storehouse subassembly 1 cooperate, through annular cutter 5 and the knife anvil face butt on the annular knife anvil 24, and then can get off the smooth cutting of target tissue, improved cutting efficiency, again through set up cavity structure 241 structure on annular knife anvil 24, can avoid annular cutter 5 to continue to cut with the entity of annular knife anvil 24 after annular cutter 5 accomplishes the tissue cutting, influence annular cutter 5's motion efficiency, and then reduce annular cutter 5's cutting force.

In some embodiments, the annular anvil 24 is provided with an abutment block 243, the abutment block 243 is disposed in the concave cavity structure 241, and two ends of the abutment block 243 are fixedly connected to two inner walls of the concave cavity structure 241 respectively and correspond to the positions of the connecting holes 242.

It should be noted that, after the fixing member 23 penetrates the connection hole 242, the abutment block 243 is disposed above the fixing member 23 on the cutting path of the annular cutter 5.

In this embodiment, the annular cutter 5 is abutted against the abutment block 243 on the annular cutter anvil 24, so that the fixing piece 23 is cut off from the second tissue reinforcing pad 4, the smooth separation of the second tissue reinforcing pad 4 from the anvil component 2 is ensured, and then the suture strength of the suture hole is improved through the arranged second tissue reinforcing pad 4, the risk of tearing the suture hole is avoided, and the success rate of the surgical suture connection hole is improved.

In some embodiments, the circular tissue stapling device further comprises an operating mechanism in driving connection with the ejector 12; the operating mechanism can drive the ejector 12 to move so that the staple ejecting block 121 can reciprocate between a preset ejecting position and a preset contracting position.

The pad pushing block 122 and the staple pushing block 121 in the ejector 12 can be synchronously moved back and forth between a preset pushing position and a preset retracted position under the driving of the operating mechanism, or can be asynchronously pushed out.

In other embodiments, the movement of the pad ejecting block 122 and the staple ejecting block 121 may not be consistent under the driving of the operation mechanism, for example, the pad ejecting block 122 may preferentially eject the staple ejecting block 121.

In some embodiments, the annular cutter 5 is in transmission connection with the operating mechanism; the operating mechanism can drive the annular cutter 5 to reciprocate in the cutting direction.

Specifically, in the state that the nail anvil assembly 2 is matched with the nail bin assembly 1, the annular cutter 5 is driven to move along the cutting direction through the operating mechanism, then the annular cutter 5 contacts with tissue and then abuts against the anvil surface of the annular cutter anvil 24, then the target tissue is cut off, the annular cutter 5 further moves along the cutting direction, after the annular cutter 5 contacts with the fixing piece 23, the annular cutter 5 abuts against the abutting block 243 of the annular cutter anvil 24, then the fixing piece 23 is cut off, and the second tissue fixing piece 4 is separated from the nail anvil body 22.

In some embodiments, the operating mechanism can be in transmission connection with the anvil assembly 2; the operating mechanism can drive the nail anvil assembly 2 to move relative to the nail bin assembly 1 along the axial direction until the nail anvil assembly 2 and the nail bin assembly 1 reach an anastomotic state; the operating mechanism can drive the nail anvil assembly 2 to move along the axial direction in cooperation with the nail bin assembly 1.

In some embodiments, as shown in fig. 12, the anvil assembly 2 is further provided with a connecting rod 21; one end of the connecting rod 21 is fixed at the bottom of the annular inner cavity, and the other end of the connecting rod 21 is used for being in transmission connection with the operating mechanism.

Specifically, the connecting rod 21 is disposed on the axial center of the anvil body 22.

In this embodiment, the connecting rod 21 is in transmission connection with the operating mechanism, and the anvil assembly 2 can move along the staple cartridge assembly 1 under the driving of the operating mechanism, so that the connection stability of the anvil assembly 2 and the operating mechanism is ensured.

1. this application is through being connected first tissue mounting 3 and nail storehouse subassembly 1 separable, guaranteed the connection reliability of preoperative first tissue mounting 3 and nail storehouse subassembly 1, under nail anvil subassembly 2 and nail storehouse subassembly 1 complex state, the staple can be with first tissue mounting 3 fixed connection on the tissue, and then improve the joint strength of anastomat, pack the space between staple and tissue through first tissue mounting 3 simultaneously, thereby reduce the phenomenon that the anastomat oozes blood, oozes liquid and anastomat was torn, and then reduce the emergence of postoperative complication, thereby improved the success rate of operation.

2. This application has avoided the risk that preoperative second tissue mounting 4 breaks away from with nail anvil subassembly 2 through with second tissue mounting 4 and nail anvil subassembly 2 fixed connection to second tissue mounting 4 sets up in the terminal side of nail anvil subassembly 2, and second tissue mounting 4 sets up towards first tissue mounting 3, under nail anvil subassembly 2 and nail storehouse subassembly 1 complex state, the anastomat can be fixed first tissue mounting 3 and second tissue mounting 4 on the tissue of anastomotic stoma department, and then can improve the joint strength of anastomotic stoma to reduce the phenomenon that the anastomotic stoma was torn, again through the space between first tissue mounting 3 and second tissue mounting 4 packing anastomat and tissue, avoided the risk of anastomotic stoma department oozes blood and oozes liquid, reduce the complication, thereby reduce the operation risk.

3. In the application, at least one first dividing and cutting structure 31 is arranged on the first tissue fixing piece 3, at least one second dividing and cutting structure 41 is arranged on the second tissue fixing piece 4, the position of the first dividing and cutting structure 31 is opposite to the position of the second dividing and cutting structure 41 in the state that the nail anvil assembly 2 is anastomosed and connected with the nail bin assembly 1, the position of the first dividing and cutting structure 31 is opposite to the position of the second dividing and cutting structure 41, the effect of a certain expansion amount of an anastomotic stoma under the action of the tension of the tissue can be guaranteed on the basis of reinforcing the tissue, so that the nail anvil assembly 2 is taken out from the anastomotic stoma conveniently, the risk of tearing the anastomotic stoma in the process of taking out the nail anvil assembly 2 is avoided, and the success rate of an operation is improved.

4. According to the surgical operation device, the first dividing fracture structure 31 and the second dividing fracture structure 41 are arranged in the same structure, and in the state that the nail anvil assembly 2 is connected with the nail bin assembly 1 in an anastomotic mode, the position of the first dividing fracture structure 31 is opposite to that of the second dividing fracture structure 41, the size and the direction of separation of the first tissue fixing piece 3 and the second tissue fixing piece 4 from the corresponding first dividing fracture structure 31 and the second dividing fracture structure 41 are consistent under the action of tissue tension, the separation quantity consistency of the first dividing fracture structure 31 and the second dividing fracture structure 41 is guaranteed, the risk of tearing of the anastomotic orifice caused by dislocation separation of the first tissue fixing piece 3 and the second tissue fixing piece 4 is avoided, and accordingly the surgical operation success rate is improved.

5. The first tissue fixing piece 3 in the application further comprises a reinforcing part 32 protruding towards one side deviating from the nail outlet part, the end side of the first segmentation fracture structure 31 is connected with the reinforcing part 32, and the expansion degree of the anastomotic stoma under the action of tissue tension can be limited through the reinforcing part 32 on the first tissue fixing piece 3, so that the connection strength of the first tissue fixing piece 3 is improved, the connection strength of the anastomotic stoma is enhanced, the risk of tearing of the anastomotic stoma is avoided, and the success rate of an operation is improved.

6. Through being provided with at least one spacing recess 111 on the play nail portion of nail storehouse 11 in this application, first tissue mounting 3 fixed connection is on spacing recess 111, thereby improved the stability of the fixed connection of first tissue mounting 3 and nail storehouse 11, prevent that first tissue mounting 3 is connected unreliable with nail storehouse 11 before the art, the phenomenon that drops from nail storehouse 11, thereby improved the tissue reinforcement effect of first tissue mounting 3 to the anastomat, thereby reduce the oozing blood, the oozing liquid condition of anastomat, improve the success rate of operation, reduce the complication.

7. In the present application, by arranging the plurality of circumferentially arranged staple pushing blocks 121 on the ejector 12, the staple accommodating bin 123 is arranged at the pushing end of the staple pushing block 121, the staple outlet portion is further provided with a plurality of staple outlets 112, the positions of the staple outlets 112 and the staple pushing blocks 121 are in one-to-one correspondence, and in the state that the anvil assembly 2 is anastomosed and connected with the staple bin assembly 1, the plurality of staple pushing blocks 121 can push out a plurality of staples from the staple outlets 112 at the same time, so that the stapling of the staples is realized through the abutting connection of the staples and the anvil assembly 2.

8. Through still being provided with gasket ejecting block 122 on ejector 12 in this application, ejector 12 can drive gasket ejecting block 122 and follow the staple ejecting direction motion for nail storehouse 11, under the promotion of gasket ejecting block 122, first tissue mounting 3 can be smooth separate from nail storehouse subassembly 1, avoided first tissue mounting 3 and nail storehouse subassembly 1 to separate badly, the staple that leads to tears the destruction to first tissue mounting 3, and then improved the roughness of first tissue mounting 3 and tissue laminating, thereby with first tissue mounting 3 and tissue fixed connection through the staple, the reinforcement effect of first tissue mounting 3 to the tissue has been improved.

Example 1

Referring to fig. 1-20, in the present embodiment, a circular tissue stapling apparatus includes a cartridge assembly 1, an anvil assembly 2 for use with the cartridge assembly 1, and a first tissue fastener 3; the first tissue fixing piece 3 is detachably connected with the nail bin assembly 1; the nail bin assembly 1 is provided with a nail bin 11, a plurality of anastomotic nail containing bins 123 matched with anastomotic nails are arranged in the nail bin 11, and the first tissue fixing piece 3 is arranged at the end side of the nail outlet part; in the state that the nail anvil assembly 2 is matched with the nail bin assembly 1, the first tissue fixing piece 3 is arranged between the nail anvil assembly 2 and the nail bin assembly 1, and the anastomat is fixedly connected with the first tissue fixing piece 3.

The circular tissue suturing device further comprises a second tissue fixing element 4, and in this embodiment, the first tissue fixing element 3 and the second tissue fixing element 4 are made of the same material, i.e. poly (glycolide) (PLGA).

As shown in fig. 8, the first tissue fixing member 3 has a concentric circle structure, a reinforcing portion 32 is protruded from an outer circumferential edge of the concentric circle toward a side away from the nail-out portion, four linear first dividing and breaking structures 31 are provided on the first tissue fixing member 3, and the first dividing and breaking structures 31 penetrate through the outer circumference and the inner circumference of the first tissue fixing member 3.

As shown in fig. 9, the second tissue fixing member 4 includes a semicircular connecting portion 43 and a spacer body 42, and four linear second dividing structures 41 are provided on the spacer body 42, and the second dividing structures 41 penetrate through an outer ring of the second tissue fixing member 4 and an inner ring of the second tissue fixing member 4. On the inner ring edge and the outer ring edge of the gasket body 42, four connecting portions 43 are equidistantly distributed towards one side facing away from the first tissue fixing piece 3, the connecting portions 43 are arranged at the second dividing and cutting structure 41 of the second tissue fixing piece 4, and the connecting portions 43 are connected with solid portions on two sides of the second tissue fixing piece 4.

The nail anvil assembly 2 comprises a nail anvil body 22 and four fixing pieces 23, wherein fixing piece matching holes 221 are formed in the side wall of the nail anvil body 22 at equal intervals, one end of each fixing piece 23 can penetrate through each fixing piece matching hole 221, and the other end of each fixing piece 23 is arranged on the outer side of the nail anvil body 22.

The anvil assembly 2 further includes an annular anvil 24, as shown in fig. 12-14, a concave cavity structure 241 is provided on the annular anvil 24, connecting holes 242 matched with the fixing piece matching holes 221 are provided on the circumference of the annular anvil 24, the connecting holes 242 are uniformly distributed at intervals along the circumference of the annular anvil 24, abutting blocks 243 are provided on the annular anvil 24, the abutting blocks 243 are provided in the concave cavity structure 241, two ends of the abutting blocks 243 are fixedly connected on two side inner walls of the concave cavity structure 241 respectively and correspond to the positions of the connecting holes 242, and after the fixing piece 23 penetrates through the connecting holes 242, the abutting blocks 243 are arranged above the fixing piece 23 on the cutting path of the annular cutter 5.

The nail anvil body 22 is provided with the knife anvil accommodating groove 223, the annular knife anvil 24 is fixedly connected in the knife anvil accommodating groove 223, the opening end of the concave cavity structure 241 faces the inner wall of the knife anvil accommodating groove 223, the connecting end of the concave cavity structure 241 faces the annular cutting knife 5, and the annular cutting knife 5 can be abutted on the annular knife anvil 24 under the state that the nail anvil component 2 is matched with the nail bin component 1.

One end of the fixing piece 23 sequentially penetrates through the fixing piece matching hole 221 and the connecting hole 242 and is fixedly connected with the connecting part 43 on the edge of the inner ring of the second tissue fixing piece 4 in a hot pressing mode, and the other end of the fixing piece 23 is fixedly connected with the connecting part 43 on the edge of the outer ring of the second tissue fixing piece 4 in a hot pressing mode.

The cartridge assembly 1 comprises an ejector 12; the nail bin 11 is provided with an ejector assembly groove; the ejector 12 is installed in the ejector assembly groove, two rings of staple ejecting blocks 121 are alternately arranged in the circumferential direction of the ejector 12, a plurality of staple outlets 112 are further arranged on the staple outlet part, the positions of the staple outlets 112 and the staple ejecting blocks 121 are in one-to-one correspondence, and the ejecting ends of the staple ejecting blocks 121 are provided with staple accommodating bins 123.

The nail bin assembly 1 comprises a nail bin 11, and sixteen limit grooves 111 are formed in the nail bin 11; the first tissue fixing piece 3 is fixedly connected to the limiting groove 111 in a cold pressing mode, and under the condition that the first tissue fixing piece 3 is fixedly connected with the limiting groove 111 in a cold pressing mode, the positions of the limiting groove 111 are distributed at two end sides close to the first dividing fracture structure 31.

The ejector 12 is further provided with a gasket pushing block 122, and the gasket pushing block 122 is provided at a position corresponding to the position of the limit groove 111.

The spacer pushing block 122 is provided with a limiting structure 1221 at one end opposite to the pushing end, and the limiting groove 111 is provided with a limiting protrusion 1111 matched with the limiting structure 1221, so that the pushing stroke of the spacer pushing block 122 is limited by the limiting abutting connection between the limiting structure 1221 and the limiting protrusion 1111.

The nail bin assembly 1 further comprises an annular cutter 5, the nail bin 11 is further provided with a cutter mounting groove 13, and the annular cutter 5 is mounted in the cutter mounting groove 13.

The circular tissue suturing device further comprises an operating mechanism, the operating mechanism can be respectively in transmission connection with the ejector 12, the nail anvil assembly 2 and the annular cutter 5, and under the driving of the operating mechanism, the ejector 12 can simultaneously drive the anastomotic pushing block 121 and the gasket pushing block 122 to reciprocate along the nail outlet 112 and the limiting groove 111 respectively.

And the annular cutter 5 can reciprocate in the cutting direction under the drive of the operating mechanism, and then the annular cutter 5 contacts with tissues and then abuts against the anvil surface of the annular cutter anvil 24 to cut off target tissues, and the annular cutter 5 further moves in the cutting direction, and after contacting with the fixing piece 23, the annular cutter 5 abuts against the abutting block 243 of the annular cutter anvil 24 to cut off the fixing piece 23, so that the second tissue fixing piece 4 is separated from the anvil body 22.

The operating mechanism can also drive the nail anvil assembly 2 to move relative to the nail bin assembly 1 along the axial direction, so that the nail anvil assembly 2 and the nail bin assembly 1 reach an anastomotic state.

Example two

The difference between the second embodiment and the first embodiment is that the structure of the pad pushing block 122 and the structure of the limiting groove 111, and the arrangement of the matching manner of the pad pushing block 122 and the limiting groove 111 are the same as those of the embodiment 1, and the details of the differences between the embodiment 2 and the embodiment 1 will not be repeated here, and the following description will be made:

the spacer pushing block 122 axially contracts along the pushing direction, the structure of the limiting groove 111 is matched with the pushing end of the spacer pushing block 122, and the pushing distance of the spacer pushing block 122 is limited by the clamping connection between the pushing end of the spacer pushing block 122 and the inner wall of the limiting groove 111 in the process that the spacer pushing block 122 moves along the pushing direction of the staples relative to the staple cartridge 11.

Example III

The difference between the third embodiment and the first embodiment is that the structures of the first tissue fixing member 3 and the second tissue fixing member 4 are the same as those of the first embodiment, and the details thereof will not be described again, and the differences between the third embodiment and the first embodiment will now be described as follows:

as shown in fig. 7, the first tissue fixing member 3 is not provided with a first dividing structure, and the second tissue fixing member 4 is not provided with a second dividing structure.

In this embodiment, the structure of the dividing fracture is not formed on the first tissue fixing member 3 and the second tissue fixing member 4, so that the structure of the first tissue fixing member 3 and the second tissue fixing member 4 can be simplified, the assembly of the first tissue fixing member 3 and the second tissue fixing member 4 and the corresponding anvil assembly 2 and cartridge assembly 1 is facilitated, and the first tissue fixing member 3 and the second tissue fixing member 4 are fixedly connected to the tissue through the staples, so that the connection strength of the anastomotic stoma is improved.

Example IV

The difference between the fourth embodiment and the first embodiment is that the structure of the first tissue fixing member 3 is the same as that of the first embodiment, and the details thereof will not be described again, and the differences between the fourth embodiment and the first embodiment will now be described as follows:

the first tissue fastening member 3 is structured such that, as shown in fig. 3, the reinforcement portion 32 is not provided on the first tissue fastening member 3.

In this embodiment, the reinforcement portion 32 is not disposed on the first tissue fixing member 3, so that the structure of the first tissue fixing member 3 can be simplified, and the assembly of the first tissue fixing member 3 and the corresponding anvil assembly 2 is facilitated, so that the first tissue fixing member 3 is fixedly connected to the tissue through the staples, and the connection strength of the anastomotic stoma is improved.

The working process of the circular tissue suturing device in the embodiment of the application is as follows:

first tissue fixing piece 3 is fixedly connected in limit groove 111 through the mode of colding pressing, one end of fixing piece 23 penetrates through fixing piece matching hole 221 and connecting hole 242 in sequence and then is fixedly connected with connecting portion 43 on the edge of the inner ring of second tissue fixing piece 4 through hot pressing, and the other end of fixing piece 23 is fixedly connected with connecting portion 43 on the edge of the outer ring of second tissue fixing piece 4 through hot pressing.

Then, in the state that the nail anvil assembly 2 is matched with the nail bin assembly 1, the nail anvil assembly 2 is in transmission connection with the operating mechanism through the connecting rod 21 on the nail anvil assembly 2, and then the nail anvil assembly 2 moves relative to the nail bin assembly 1 along the axial direction under the driving of the operating mechanism until the nail anvil assembly 2 and the nail bin assembly 1 reach the matched state, in this state, the ejector 12 is driven to move through the operating mechanism, so that the nail push-out block 121 and the gasket push-out block 122 simultaneously push to preset push-out positions along the push-out direction of the ejector 12, and then under the action of the gasket push-out block 122, the first tissue fixing piece 3 is separated from the limiting groove 111, and simultaneously, the anastomat in the nail push-out block 121 sequentially contacts the first tissue fixing piece 3, the tissue and the second tissue fixing piece 4 and then abuts against the abutting face 222 on the nail anvil body 22, so that the annular cutter 5 moves along the cutting direction after the annular cutter 5 contacts with the tissue, and then the annular cutter 23 further contacts the annular cutter body 243, and the annular cutter 23 further contacts the annular cutter body 23.

Finally, the anvil body 22 is removed from the seam by rotating left and right.

All embodiments in the application are described in a progressive manner, and identical and similar parts of all embodiments are mutually referred, so that each embodiment mainly describes differences from other embodiments.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

1. A circular tissue suturing device, comprising: the device comprises a nail bin assembly (1), a nail anvil assembly (2), a first tissue fixing piece (3) and a second tissue fixing piece (4);

the first tissue fixing piece (3) is detachably connected with the nail bin assembly (1);

the second tissue fixing piece (4) is fixedly connected with the nail anvil assembly (2);

the nail bin assembly (1) is provided with a nail bin (11), a plurality of anastomotic nail containing bins (123) matched with anastomotic nails are arranged in the nail bin (11), and the first tissue fixing piece (3) is arranged at the end side of the nail bin (11);

in the state that the nail anvil assembly (2) is matched with the nail bin assembly (1), the first tissue fixing piece (3) and the second tissue fixing piece (4) are arranged between the nail anvil assembly (2) and the nail bin assembly (1), and the first tissue fixing piece (3) and the second tissue fixing piece (4) are fixedly connected through the anastomat.

2. A circular tissue stapling device according to claim 1, wherein the cartridge assembly (1) comprises a cartridge (11); the nail bin (11) is provided with a nail outlet part;

at least one limiting groove (111) is formed in the nail outlet part;

the first tissue fixing piece (3) is fixedly connected to the limiting groove (111).

3. A circular tissue stapling device according to claim 1, wherein the first tissue securing member (3) is fixedly connected to the cartridge assembly (1).

4. A circular tissue suturing device according to claim 1, wherein the first tissue anchor (3) is provided with at least one first dividing fracture structure (31) and the second tissue anchor (4) is provided with at least one second dividing fracture structure (41);

in a state that the nail anvil assembly (2) is anastomosed and connected with the nail bin assembly (1), the position of the first dividing and cutting structure (31) is opposite to the position of the second dividing and cutting structure (41).

5. A circular tissue suturing device according to claim 4, wherein the first and second split structures (31, 41) are identical in construction.

6. A circular tissue stapling device according to any one of claims 1-5, wherein the first tissue securing member (3) is provided with a reinforcement portion (32), the reinforcement portion (32) being arranged convexly towards a side facing away from the anvil assembly (2).

7. The circular tissue stapling device according to claim 6, wherein the cartridge assembly (1) further comprises an ejector (12); the nail bin (11) is provided with an ejector assembly groove;

the ejector (12) is mounted in the ejector mounting groove.

8. A circular tissue stapling device according to claim 7, wherein the ejector (12) is provided with a plurality of circumferentially arranged staple ejecting blocks (121);

the anastomotic nail accommodating bin (123) is arranged at the pushing end of the anastomotic nail pushing block (121);

the nail outlet part is also provided with a plurality of nail outlet openings (112), and the nail outlet openings (112) are in one-to-one correspondence with the positions of the anastomotic nail pushing blocks (121).

9. The circular tissue suturing device according to claim 8, wherein a spacer pushing block (122) is further arranged on the ejector (12), and the ejector (12) can drive the spacer pushing block (122) to move relative to the staple cartridge (11) along the staple pushing direction;

The first tissue anchor (3) is separable from the cartridge assembly (1) under the urging of the pad ejector block (122).

10. A circular tissue suturing device according to claim 9, wherein the spacer pushing block (122) is disposed within the limit groove (111).

11. The circular tissue stapling device according to claim 8, wherein the cartridge assembly (1) further comprises an annular cutter (5), the cartridge (11) further comprises a cutter mounting groove (13), and the annular cutter (5) is mounted in the cutter mounting groove (13).

12. The circular tissue suturing device of claim 11, further comprising an operating mechanism in driving connection with the ejector (12);

the operating mechanism can drive the ejector (12) to move so that the anastomotic pushing block (121) can reciprocate between a preset pushing position and a preset shrinking position.

13. A circular tissue suturing device according to claim 12, wherein the annular cutter (5) is in driving connection with the operating mechanism;

the operating mechanism can drive the annular cutter (5) to reciprocate in the cutting direction.

14. A circular tissue stapling device according to claim 13, wherein the operating mechanism is adapted to be in driving connection with the anvil assembly (2);

the operating mechanism can drive the nail anvil assembly (2) to move relative to the nail bin assembly (1) along the axial direction until the nail anvil assembly (2) and the nail bin assembly (1) reach an anastomotic state;

the operating mechanism can drive the nail anvil assembly (2) to move along the axial direction in cooperation with the nail bin assembly (1).

15. A circular tissue stapling device according to claim 14, wherein the anvil assembly (2) is further provided with a connecting rod (21);

one end of the connecting rod (21) is fixed at the bottom of the annular inner cavity, and the other end of the connecting rod (21) is in transmission connection with the operating mechanism.