Nail bin cylinder assembly and anastomat

Abstract

The invention relates to a nail bin cylinder assembly and an anastomat, and belongs to the field of medical surgical instruments. The cartridge cartridge assembly includes: a cartridge housing; the suturing nail is used for suturing tissues; the annular bin body is arranged in the barrel shell and provided with a suturing face, a plurality of suturing cavities used for containing suturing nails are formed in the annular bin body, and the suturing cavities penetrate through the suturing face; the nail pushing piece is arranged in the suturing cavity and located below the suturing nails, and the nail pushing piece pushes the suturing nails to trigger; the annular cutting knife is arranged on the inner side of the annular bin body, and the annular cutting knife can move relative to the annular bin body in the axis direction of the barrel shell; and at least two gripping members, each gripping member comprising a gripping structure for securing tissue, the gripping structures being arranged inside the annular cutting knife. The nail bin cylinder body assembly is beneficial to keeping more healthy tissues, is particularly suitable for intestinal tract operations, especially low rectal cancer operations, and can achieve the anastomosis and anus protection effects of low rectal cancer by using the anastomat.

Description

Technical Field

[0001] The invention relates to a staple cartridge cylinder assembly and an anastomosis device, belonging to the field of medical surgical instruments. Background Art

[0002] The circular stapler is mainly used for anorectal suture surgery. The circular stapler includes a stapler body and an anvil assembly mounted on the stapler body. During the operation, the two sides of the target tissue (lesioned tissue) are first severed and purse-string sutured, and then the target tissue is cut. Then the anvil assembly and the stapler body are respectively placed on both sides of the tissue that needs to be docked and sutured. After the anvil assembly and the stapler body are docked, the circular stapler starts the closed suture to achieve docking and suturing of the severed parts.

[0003] During the above operation, the tissue after purse-string suture is tensioned on the stapler body, and when the circular stapler is closed and sutured, the tissue after purse-string suture is cut. In this operation, since the tissue purse-string needs to be sutured, firstly, the outer edge after purse-string suture is expected to be retained by 5mm, and the length of the part to be cut tensioned on the stapler body is about 12-14mm, so during the whole operation, it is expected that 17-19mm of healthy tissue will be removed. However, in some existing operations (such as low rectal cancer operations), it is necessary to retain as much healthy tissue as possible or in operations with less healthy tissue, so it is urgent to change the structure of the existing circular stapler to achieve as much retention of healthy tissue as possible. Summary of the invention

[0004] An object of the present invention is to provide a nail magazine cylinder assembly that helps to retain more healthy tissue.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a nail magazine cylinder assembly, comprising:

[0006] barrel shell;

[0007] Staples, used to suture tissue;

[0008] An annular bin body is disposed in the barrel housing and has a suturing surface. A plurality of suturing cavities for accommodating the suturing staples are formed in the annular bin body, and the suturing cavities penetrate the suturing surface;

[0009] A nail pushing piece is arranged in the suturing cavity and is located below the suturing nail, and the nail pushing piece pushes the suturing nail to fire;

[0010] An annular cutting knife is arranged on the inner side of the annular silo body, and the annular cutting knife can move relative to the annular silo body in the axial direction of the barrel shell; and

[0011] At least two gripping members, each of which comprises a gripping structure for fixing tissue on the side of the staple cartridge barrel assembly, and the gripping structure is arranged on the inner side of the annular cutting knife.

[0012] Furthermore, the gripping structure includes a hook portion for piercing into tissue.

[0013] Furthermore, the hook portion has a straight hook for piercing into tissue.

[0014] Furthermore, an angle no greater than 90° is formed between the axis of the straight hook and the inner side surface of the annular cutting knife, and the opening direction of the angle is away from the suture surface.

[0015] Furthermore, the hook portion has a curved hook for piercing into tissue.

[0016] Furthermore, the hook is bent from one end in a direction away from the suture surface.

[0017] Furthermore, the hook extends along a circumferential direction.

[0018] Furthermore, it is characterized in that each of the gripping members comprises at least two hook portions which are arranged in parallel along the circumferential direction.

[0019] Furthermore, a plurality of barbs are formed on the hook portion.

[0020] Furthermore, the gripping structure comprises a holding portion located at the inner side of the annular cutting knife and a folding portion pivotally connected to the holding portion, and the folding portion clamps the tissue after being folded toward the holding portion.

[0021] Furthermore, the abutting portion has first comb teeth for piercing into the tissue, and the folding portion has second comb teeth arranged crosswise with the first comb teeth and for piercing into the tissue.

[0022] Furthermore, barbs are formed on the first comb teeth and the second comb teeth.

[0023] Furthermore, the gripping member further comprises a connecting portion for fixing the gripping structure on the annular warehouse body;

[0024] The annular cutting knife has a blade portion, and an avoidance groove extending along the blade-out direction of the annular cutting knife is formed on the annular cutting knife, a distance is formed between the avoidance groove and the blade portion, and the connecting portion passes through the avoidance groove.

[0025] Furthermore, the annular cutting knife is defined as a first position before firing and a second position after firing, and the position of the portion of the gripping structure that fixes the tissue is higher than the position of the blade when the annular cutting knife is in the first position and is lower than or equal to the suturing surface.

[0026] The present application also provides a stapler, comprising a stapler body and a stapler anvil assembly arranged on the stapler body, wherein the stapler body comprises a shaft assembly, a gripping assembly arranged on one end of the shaft assembly and the above-mentioned staple magazine cylinder assembly arranged on the other end of the shaft assembly.

[0027] The beneficial effect of the present invention is that by arranging a gripping piece for fixing tissue in the staple cartridge cylinder assembly, when in use, after the staple cartridge cylinder assembly reaches one side of the tissue to be sutured, it is only necessary to fix the tissue on that side to the gripping piece. When the suturing and cutting are completed, the tissue fixed on the gripping piece is cut off, and the suturing work is also completed at the same time. In this way, there is no need to perform purse-string suturing on one side of the staple cartridge cylinder assembly. By fixing the tissue with the gripping piece, the cut tissue is only the part from the inner edge of the suture surface to the part fixed by the gripping piece. Therefore, compared with the existing purse-string suturing method, less tissue is cut, which helps to preserve more healthy tissue. It is particularly suitable for intestinal surgery, especially low rectal cancer surgery. By using the stapler, the anus-preserving effect of anastomosis of low rectal cancer can be achieved.

[0028] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a nail magazine cylinder assembly and a nail anvil assembly shown in one embodiment of the present invention;

[0030] Figure 2 for Figure 1 A partially exploded view of the staple cartridge barrel assembly shown;

[0031] Figure 3 for Figure 1 A partial enlarged view of the

[0032] Figure 4 for Figure 1 The structural schematic diagram of the nail anvil assembly shown;

[0033] Figure 5 It is a structural schematic diagram of a nail magazine cylinder assembly shown in another embodiment of the present invention;

[0034] Figure 6It is a structural schematic diagram of a nail magazine cylinder assembly shown in another embodiment of the present invention;

[0035] Figure 7 It is a structural schematic diagram of a nail magazine cylinder assembly shown in yet another embodiment of the present invention;

[0036] Figure 8 for Figure 7 A cross-sectional view of the gripping member in FIG. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] Embodiment 1

[0042] See also Figures 1 to 3 The stapler shown in a preferred embodiment of the present application includes a stapler body and a stapler anvil assembly 20 assembled to the stapler body. The stapler body includes a shaft assembly, a grip assembly disposed at one end of the shaft assembly, and a staple cartridge cylinder assembly 10 disposed at the other end of the shaft assembly. In this embodiment, the shaft assembly and the grip assembly can adopt existing structures, which will not be described in detail herein.

[0043] The staple cartridge barrel assembly 10 comprises a barrel housing 11, an annular barrel body 12 disposed in the barrel housing 11, a plurality of suture staples (not shown) and a plurality of staple pushers (not numbered) disposed in the annular barrel body 12, an annular cutting knife 13 and a gripping member 14 arranged inside the annular barrel body 12. The structure of the barrel housing 11 may adopt an existing structure.

[0044] The annular housing 12 has a side wall 121 to enclose a receiving space 122. The annular cutting knife 13 and the gripping member 14 are located in the receiving space 122. The annular cutting knife 13 can move relative to the annular housing 12 in the axial direction of the barrel housing 11. The annular housing 12 also has a suturing surface 123, which faces the anvil assembly 20 so that when in a closed state, the anvil assembly 20 clamps the tissue to be sutured (not numbered). A plurality of suturing cavities 124 are formed in the annular housing 12, and the suturing cavities 124 pass through the suturing surface 123. Suturing staples are used to suture tissues. Each suturing staple is arranged in correspondence with a suturing cavity 124 and is accommodated in the corresponding suturing cavity 124. The staple pusher is at least arranged in the suturing cavity 124 and arranged in correspondence with the suturing staple, and is located below the suturing staple. The staple pusher is used to push the suturing staple to fire, so as to suture the tissue to be sutured.

[0045] There are at least two gripping members 14 . In this embodiment, the gripping members 14 are arranged at equal intervals along the circumferential direction. Each gripping member 14 includes a gripping structure 141 for fixing the tissue on the side of the staple cartridge cylinder assembly 10 . The gripping structure 141 is arranged on the inner side of the annular cutting knife 13 .

[0046] By setting a gripper 14 for fixing the tissue on this side in the staple cartridge barrel assembly 10, when the stapler is used, after the staple cartridge barrel assembly 10 reaches one side of the tissue to be sutured, it is only necessary to fix the tissue on this side to the gripper 14. When the suturing and cutting are completed, the tissue fixed on the gripper 14 is cut off, and the suturing work is also completed at the same time. In this way, there is no need to perform purse-string suturing on one side of the stapler barrel assembly 10. By fixing the tissue with the gripper 14, the cut tissue is only the part from the inner edge of the suture surface to the part fixed by the gripper 14. Therefore, compared with the existing purse-string suturing method, less tissue is cut, which helps to retain more healthy tissue. It is particularly suitable for intestinal surgery, especially low rectal cancer surgery. By using the stapler, the anus-preserving effect of anastomosis of low rectal cancer can be achieved.

[0047] It should be noted that, according to tests, when the stapler is used, the length of the cut tissue includes two sections, wherein the first section is the distance between the position of the part of the gripping member 14 that fixes the tissue and the cut surface of the tissue, which is usually (not more than) 5 mm, and the second section is the distance between the position of the part of the gripping member 14 that fixes the tissue and the inner edge of the suture surface 123, which is determined according to the position of the gripping member 14 and is usually no more than 3 mm. In this way, the length of the cut tissue is approximately (not more than) 8 mm.

[0048] In one embodiment, see Figures 2 to 4 The gripping structure 141 is a hook portion 141 for piercing into the tissue. The hook portion 141 is inserted into the tissue to fix the tissue. This structure is simple, and during surgery, the tissue only needs to be pulled onto the hook portion 141, which is easy to operate. In an optional embodiment, the hook portion 141 is a curved hook 141 for piercing into the tissue. In this embodiment, the curved hook 141 is bent from one end toward the direction away from the suture surface 123. In other embodiments, the curved hook 141 can also extend in the circumferential direction. The curved hook 141 makes the tissue fixed thereon more firmly fixed, which helps to prevent the tissue from detaching.

[0049] In another optional embodiment, the hook portion has a straight hook for piercing into the tissue, and the tissue is fixed by the straight hook, which makes the operation simpler. In order to prevent the tissue from detaching, an angle of no more than 90° is formed between the axis of the straight hook and the inner side of the annular cutting knife, and the opening direction of the angle is away from the suture surface.

[0050] In the above embodiment, the number of hook portions 141 formed on each gripping member 14 is one. However, in other embodiments, see Figure 5 Each gripping member 14 includes two hook portions 141 arranged in parallel along the circumferential direction. Of course, the number of hook portions 141 may be greater than two. The hook portions 141 arranged in parallel on each gripping member 14 are connected by a connecting rod portion 143. Such an arrangement can disperse the force on the tissue on each gripping member 14 to prevent tissue tearing.

[0051] In order to increase the gripping force of the gripping member 14 on the tissue, a plurality of barbs may be formed on the hook portion 141 .

[0052] In order to facilitate the fixing of the gripping member 14, the gripping member 14 further includes a connecting portion 142 for fixing the gripping structure 141 on the annular chamber body 12. The connecting portion 142 is formed by extending from the side wall 121 in the radial direction of the annular chamber body 12, and the hook portion 141 is formed by bending from one end of the connecting portion 142 away from the side wall 121. By arranging the connecting portion 142 on the side wall 121, the size of the gripping member 14 can be reduced.

[0053] Since the annular cutting knife 13 needs to move along the axial direction relative to the annular warehouse body 12, in order to prevent interference between the connecting portion 142 and the annular cutting knife 13, an avoidance groove 131 extending along the knife-out direction of the annular cutting knife 13 is formed on the annular cutting knife 13. The annular cutting knife 13 has a blade portion 132, and a gap is formed between the avoidance groove 131 and the blade portion 132, and the connecting portion 142 passes through the avoidance groove 131. Since there is a gap between the avoidance groove 131 and the blade portion 132, the avoidance groove 131 will not penetrate the blade portion 132, so that the problem of disconnection during cutting will not be caused.

[0054] The annular cutting blade 13 is defined as a first position before firing and a second position after firing. Figure 1 In the first position, the blade 132 of the annular cutting knife 13 does not extend beyond the suture surface 123, and, in the axial direction, the blade 132 is lower than the suture surface 123; in the second position, the blade 132 extends beyond the suture surface 123, and the blade 132 enters into the accommodating cavity 25 of the anvil assembly 20.

[0055] In order to minimize the cutting of tissue, the position of the hook portion 141 is set as follows: the position of the part of the hook portion 141 that fixes the tissue is higher than the position of the blade portion 132 when the annular cutting knife 13 is in the first position, and lower than or equal to the suture surface 123. Specifically, in this embodiment, the hook portion 141 as a whole does not exceed the position of the blade portion 132 when the annular cutting knife 13 is in the first position. Usually, the distance between the position of the part of the hook portion 141 that fixes the tissue and the position of the blade portion 132 is 0.5mm. Through such a setting, plus the linear distance of the axial projection between the position of the blade portion 132 and the suture surface 123 is approximately 1mm, the distance length between the position of the part of the hook portion 141 that fixes the tissue and the inner edge of the suture surface 123 is approximately 3mm.

[0056] Of course, in order to further reduce the length of the cut tissue, the position of the portion of the hook portion 141 that fixes the tissue can be set as close to the suture surface 123 as possible in the axial direction. Figure 5 and Figure 6 The position of the tissue fixing portion of the hook portion 141 is higher than the blade portion 132 of the annular cutting knife 13 and is substantially flush with the suture surface 123 .

[0057] Please combine Figure 1 and Figure 5In this embodiment, the anvil assembly 20 is detachably connected to the stapler body. The anvil assembly 20 includes an anvil head 21 and an anvil rod 22. A closing surface 23 is formed on the anvil head 21. After the anvil assembly 20 and the stapler are docked, the closing surface 23 faces the suture surface 123. A plurality of nail pits 24 are formed on the closing surface 23. The anvil rod 22 includes a plurality of clamping portions 221. The plug-in rod (not shown) in the stapler body is inserted into the clamping portion 221, thereby achieving docking of the anvil assembly 20 and the stapler body.

[0058] Embodiment 2

[0059] See also Figure 7 and Figure 8 The circular stapler provided in this embodiment has a substantially similar structure to that of the stapler in the first embodiment, except for the gripping structure. Specifically, the gripping structure 141 in this embodiment includes a holding portion 1411 located on the inner side of the annular cutting knife 13 and a folding portion 1412 pivotally connected to the holding portion 1411, and the folding portion 1412 is folded toward the holding portion 1411 to clamp the tissue. The holding portion 1411 and the folding portion 1412 are arranged in the axial direction, and the axis of the pivot connection between the two is perpendicular to the axial direction. The holding portion 1411 is fixed to the inner side wall of the annular chamber body 12 through the connecting portion 142.

[0060] The clamping structure 141 in this embodiment further includes a bent spring piece 1413 clamped between the abutting portion 1411 and the folding portion 1412. A clamping portion 1414 for clamping on the abutting portion 1411 is formed at the end of the folding portion 1412.

[0061] It should be noted that the clamping structure can also be a structure as follows: the abutting portion has a plurality of first comb teeth for piercing into the tissue, and the folding portion has a plurality of second comb teeth arranged crosswise with the plurality of first comb teeth and for piercing into the tissue, so as to improve the gripping force of the clamping structure relative to the tissue. In order to further improve the fixation of the tissue, barbs can be formed on the plurality of first comb teeth and the second comb teeth.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A nail magazine cylinder assembly, characterized in that: include: barrel shell; staples, used to suture tissue; An annular bin body is disposed in the barrel housing and has a suturing surface. A plurality of suturing cavities for accommodating the suturing staples are formed in the annular bin body, and the suturing cavities penetrate the suturing surface; A nail pushing piece is arranged in the suturing cavity and is located below the suturing nail, and the nail pushing piece pushes the suturing nail to fire; An annular cutting knife is arranged on the inner side of the annular silo body, and the annular cutting knife can move relative to the annular silo body in the axial direction of the barrel shell; and At least two gripping members, each of which comprises a gripping structure for fixing tissue on the side of the staple cartridge barrel assembly, and the gripping structure is arranged on the inner side of the annular cutting knife.

2. The staple cartridge barrel assembly according to claim 1, characterized in that: The gripping structure includes a hook portion for penetrating into tissue.

3. The staple cartridge barrel assembly according to claim 2, characterized in that: The hook portion has a straight hook for piercing into tissue.

4. The staple cartridge barrel assembly according to claim 3, characterized in that: An angle no greater than 90° is formed between the axis of the straight hook and the inner side surface of the annular cutting knife, and the opening direction of the angle is away from the suture surface.

5. The staple cartridge barrel assembly according to claim 2, characterized in that: The hook portion has a curved hook for piercing into tissue.

6. The staple cartridge barrel assembly according to claim 5, characterized in that: The hook is bent from one end toward a direction away from the suture surface.

7. The staple cartridge barrel assembly according to claim 5, characterized in that: The hook extends along the circumferential direction.

8. The staple cartridge barrel assembly according to any one of claims 2 to 6, characterized in that: Each of the gripping members includes at least two hook portions which are arranged in parallel along the circumferential direction.

9. The staple cartridge barrel assembly according to any one of claims 2 to 7, characterized in that: A plurality of barbs are formed on the hook portion.

10. The staple cartridge barrel assembly according to claim 2, characterized in that: The gripping structure comprises a holding portion located at the inner side of the annular cutting knife and a folding portion pivotally connected to the holding portion, and the folding portion clamps the tissue after being folded toward the holding portion.

11. The staple cartridge barrel assembly according to claim 10, characterized in that: The abutting portion has first comb teeth for piercing into the tissue, and the folding portion has second comb teeth arranged crosswise with the first comb teeth and for piercing into the tissue.

12. The staple cartridge barrel assembly according to claim 11, characterized in that: Barbs are formed on the first comb teeth and the second comb teeth.

13. The staple cartridge barrel assembly according to claim 1, characterized in that: The gripping member further comprises a connecting portion for fixing the gripping structure on the annular warehouse body; The annular cutting knife has a blade portion, and an avoidance groove extending along the blade-out direction of the annular cutting knife is formed on the annular cutting knife, a distance is formed between the avoidance groove and the blade portion, and the connecting portion passes through the avoidance groove.

14. The staple cartridge barrel assembly according to claim 13, characterized in that: The annular cutting knife is defined as a first position before firing and a second position after firing, and the position of the portion of the gripping structure that fixes the tissue is higher than the position of the blade when the annular cutting knife is in the first position and is lower than or equal to the suturing surface.

15. A stapler, characterized in that: The invention comprises a stapler body and a stapler anvil assembly arranged on the stapler body, wherein the stapler body comprises a shaft assembly, a gripping assembly arranged on one end of the shaft assembly and a staple magazine cylinder assembly as described in any one of claims 1 to 14 arranged on the other end of the shaft assembly.

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