Nail anvil device and anastomat

Abstract

The invention relates to the field of medical instruments, in particular to a nail anvil device and an anastomat, the nail anvil device comprises a nail anvil main body, the nail anvil main body comprises a nail anvil head and a nail anvil rod arranged on the nail anvil head, the nail anvil head is provided with a nail anvil surface with a plurality of nail pits, and the axis of the nail anvil rod is perpendicular to the nail anvil surface; the intestinal tract protection assembly is located on the side, away from the nail anvil face, of the nail anvil head and comprises a similar casing and a clamp, the similar casing is loaded on the nail anvil body, the similar casing is tubular, and the clamp can clamp the similar casing so that the similar casing can be fixed in the intestinal tract. According to the nail anvil device with the intestinal tract protection assembly, the intestinal tract protection assembly is placed in the intestine in the anastomotic operation process, the operation time is shortened, the operation process is simplified, and postoperative complications such as anastomotic leakage are reduced.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, in particular to a nail anvil device and an anastomosis device. Background Art

[0002] During intestinal anastomosis, to protect the anastomotic opening from direct irritation from digestive matter, an intestinal stent is currently placed in the intestine to isolate the anastomotic site from the digestive matter. In existing technologies, intestinal stent placement is performed independently after the anastomosis procedure. Specifically, the intestinal stent is placed in the intestine as an additional step after the intestinal anastomosis is completed.

[0003] In existing technologies, intestinal anastomosis and intestinal stent placement are two separate steps, which increases the operation time and the burden on medical staff. Furthermore, these two separate operations may cause unnecessary trauma and irritation to the patient, further complicating postoperative recovery. Summary of the Invention

[0004] The object of the present invention is to provide a nail anvil device, which can simplify the surgical operation process.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a nail anvil device, comprising:

[0006] An anvil body, comprising an anvil head and an anvil rod disposed on the anvil head, wherein the anvil head has an anvil surface formed with a plurality of nail pits, and the axis of the anvil rod is perpendicular to the anvil surface; and

[0007] The intestinal protection component is located on the side of the anvil head away from the anvil surface, and includes a casing and a clamp. The casing is loaded on the anvil body and is tubular. The clamp can clamp the casing to fix the casing in the intestine.

[0008] Furthermore, the sausage-like casing further comprises a sausage-like casing body and a protruding portion integrally formed on the sausage-like casing body; the clip can fix the protruding portion in the intestine.

[0009] Furthermore, the anvil head is formed with an accommodating cavity on a side facing away from the anvil surface, and the casing-like body can be folded in the accommodating cavity, or, when the casing-like body is folded in the accommodating cavity, the protruding portion is at least partially located in the accommodating cavity;

[0010] or,

[0011] The protruding portion and the casing-like body are both located on the outside of the anvil head. The anvil head has a side surface connecting the top surface and the anvil surface, and the protruding portion is attached to the side surface.

[0012] Furthermore, the anvil head and the protruding portion are fixed via a clamping structure; or, the anvil head and the protruding portion are interference fit; or, the protruding portion and the anvil head are connected via soluble glue.

[0013] Furthermore, the intestinal protection component also includes a clasp,

[0014] The casing-like portion can be folded in half to form a folded cavity, and the clip is used to at least partially close the open side of the folded cavity to confine the clip in the folded cavity and simultaneously fix the casing-like portion in the intestine.

[0015] Furthermore, the sausage casing is in a folded state and is sleeved on the side of the anvil head.

[0016] Furthermore, the sausage-like casing comprises a tubular structure formed of a flexible material, the sausage-like casing has an upstream end and a downstream end that are oppositely disposed, and the clip is disposed at the upstream end.

[0017] Furthermore, the clip is a hollow ring structure with an opening formed on the inner side.

[0018] Furthermore, the clamp includes a first clamping portion and a second clamping portion; the first clamping portion and the second clamping portion can move relative to each other to switch between an open position and a closed position; in the open position and the closed position, the clamping space is formed between the first clamping portion and the second clamping portion.

[0019] Furthermore, the first clamping portion and the second clamping portion are connected to form an elastic C-shaped structure.

[0020] Furthermore, the clip also includes a first force-applying part and a second force-applying part respectively connected to the first clamping part and the second clamping part; the first force-applying part and the second force-applying part drive the first clamping part and the second clamping part to switch between the open position and the closed position under the action of external force.

[0021] Furthermore, the clip further includes a limiting member;

[0022] The limiting member applies external force on the first force applying portion and the second force applying portion to limit the first clamping portion and the second clamping portion to remain in the open position; after the external force is removed, the first clamping portion and the second clamping portion remain in the closed position.

[0023] Furthermore, the clip is made of absorbable material.

[0024] Furthermore, the intestinal protection component is made of absorbable material.

[0025] The present application also provides a stapler, comprising the above-mentioned anvil device and a stapler body capable of performing anastomosis with the anvil device.

[0026] The beneficial effect of the present invention is that by using the nail anvil device with an intestinal protection component of the present application, the intestinal protection component is placed in the intestine during the anastomosis operation, which helps to reduce the operation time, simplify the operation process, and reduce the occurrence of postoperative complications such as anastomotic leakage.

[0027] 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 with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of a nail anvil device according to an embodiment of the present application;

[0029] Figure 2 A cross-sectional view of a nail anvil device according to an embodiment of the present application;

[0030] Figure 3 for Figure 2 Enlarged view of the middle circled part;

[0031] Figure 4 This is a schematic diagram of the use of an intestinal protection component shown in one embodiment of the present application;

[0032] Figure 5 For use Figure 3 A schematic structural diagram of the clip of the intestinal protection component shown;

[0033] Figure 6 This is a schematic structural diagram of a card holder shown in another embodiment of the present application;

[0034] Figure 7 This is a structural diagram of a card holder according to another embodiment of the present application;

[0035] Figure 8 This is a schematic diagram of the use of an intestinal protection component shown in another embodiment of the present application;

[0036] Figure 9 for Figure 8 Schematic diagram of the middle type casing;

[0037] Figure 10 This is a schematic diagram of the use of an intestinal protection component shown in another embodiment of the present application;

[0038] Figure 11 Schematic diagram of the structure of an anvil device shown in another embodiment of the present application.

[0039] In the figure: 100-anvil device; 10-anvil body; 11-anvil head; 12-anvil rod; 111-anvil surface; 112-top surface; 113-accommodation wall; 114-arc-shaped groove; 115-side; 13-accommodation cavity; 131-opening; 14-push plate; 15-through hole; 20-intestinal protection component; 21-type sausage casing; 211-upstream end; 212-downstream end; 213- Casing-like body; 214-protruding portion; 2141-upper side wall; 2142-lower side wall; 2143-groove; 215-folded cavity; 25-clasp; 22-clamp; 221-clamping space; 222-first clamping portion; 223-second clamping portion; 224-first force-applying portion; 225-second force-applying portion; 226-limiting member; 227-clamping opening; 200-intestine, 201-anastomosis portion. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0043] 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.

[0044] See Figures 1 to 4The anvil device 100 shown in one embodiment of the present application is used to be combined with a stapler body (not shown) to form a stapler. The structure of the stapler body can adopt the existing technology, which generally includes a shaft assembly, a staple cartridge cylinder assembly and a grip assembly arranged on opposite sides of the shaft assembly. The staple cartridge cylinder assembly has a suturing surface. The staple cartridge cylinder assembly is embedded with suture staples and a staple pusher. The shaft assembly is provided with a closing rod and a firing rod. The firing rod drives the pushing plate to move to drive the suture staple to expose the suture surface to achieve the firing of the suture staple. The stapler body is similar to the stapler body disclosed in Chinese Patent Application No. 202411448472.3 and Chinese Patent Application No. 201911195925.5, and will not be described in detail here. The anvil device 100 can be docked on the stapler body. Specifically, the anvil device 100 docks with the closing rod, and then the anvil device 100 is driven by the closing rod to move toward the suture surface to achieve the closure of the stapler.

[0045] The anvil device 100 includes an anvil body 10 and an intestinal protection component 20. The anvil body 10 includes an anvil head 11 and an anvil rod 12 arranged on the anvil head 11. The anvil head 11 has an anvil surface 111 formed with a plurality of nail pits, a top surface 112 arranged opposite to the anvil surface 111, and a side surface 115 connecting the anvil surface 111 and the top surface 112. The axis of the anvil rod 12 is perpendicular to the anvil surface 111. The anvil rod 12 is docked with the closing rod to achieve docking between the anvil device 100 and the anastomosis device body. The docking method and structure of the two can adopt the existing technology and will not be described in detail here. The intestinal protection component 20 is located on the side of the anvil head 11 away from the anvil surface 111, and includes a sausage-like casing 21 and a clamp 22. In this embodiment, the sausage-like casing 21 includes a tubular structure formed of a flexible material. The sausage-like casing 21 is loaded on the anvil body 10. The clip 22 can clamp the sausage-like casing 21 to fix the sausage-like casing 21 in the intestine 200. The clip 22 and the sausage-like casing 21 are two independent non-connected components when not installed.

[0046] By using the nail anvil device 100 with the intestinal protection component, the intestinal protection component 20 is placed in the intestine during the anastomosis operation, which helps to reduce the operation time, simplify the operation process, and reduce the occurrence of postoperative complications such as anastomotic leakage 201.

[0047] Specifically, because the anvil body 10 is loaded with the quasi-intestine casing 21, when the anvil body 10 enters the intestine 200, the quasi-intestine casing 21 also enters the intestine 200. The quasi-intestine casing 21 is then secured within the intestine 200 by the clip 22. When the quasi-intestine casing 21 is in the unfolded state, it isolates the anastomotic opening 201. Therefore, the stapler's cutting and anastomosis process and the process of placing the intestinal shielding component do not need to be performed separately, thereby helping to simplify the surgical procedure.

[0048] In order to prevent the stapler from being in an expanded state during the anastomosis process and affecting the anastomosis effect, in this embodiment, before the anastomosis, the casing is in a folded state or not fully expanded. When the anastomosis is completed, the anvil body and the stapler body are removed from the human body, and the casing 21 is in a fully expanded state. Figure 4 The casing 21 has an upstream end 211 and a downstream end 212 that are oppositely disposed. The upstream end 211 and the downstream end 212 are defined by the flow direction of intestinal fluid and excrement when the casing 21 is placed in the intestine 200. Figure 4 The direction indicated by the middle arrow a is the flow direction of intestinal fluid and excrement in the intestine 200.

[0049] In this embodiment, in order to facilitate the storage of the sausage-like casing 21, the anvil head 11 is formed with a receiving cavity 13 on the side (top surface 112) away from the anvil surface 111. The sausage-like casing 21 can be folded in the receiving cavity 13, and the opening 131 of the receiving cavity 13 is set in the direction away from the anvil surface 111. The opening 131 is set in the direction away from the anvil surface 111, which facilitates the unfolding of the sausage-like casing 21. In this embodiment, the anvil head 11 also includes a receiving wall 113 extending upward from the top surface 112. The receiving cavity 13 is formed by the receiving wall 113 and the top surface 112. In other embodiments, the receiving cavity can also be directly formed on the top surface or the side of the anvil head. In this embodiment, the sausage-like casing 21 is completely located in the receiving cavity 13 when in the folded state. In other embodiments, the sausage-like casing can also be partially accommodated in the receiving cavity when in the folded state.

[0050] In other embodiments, the casing-like body and the protrusion may both be located outside the anvil head, with the protrusion having an inner diameter greater than the diameter of the upper portion of the anvil head, and the protrusion attached to the side of the anvil head. The inner diameter of the casing-like body may be smaller than the diameter of the bottom portion of the side of the anvil head, so that the casing-like body can be supported by the bottom portion of the side, so that when the protrusion is attached to the side of the anvil head, the casing-like body is in a folded state.

[0051] As mentioned above, the sausage casing is fixed in the intestine by a clip. Specifically, the sausage casing 21 is clamped outside the intestine 200 by a clip 22 to achieve fixation. In some embodiments, the clip can directly clamp the sausage casing, preferably the clip clamps the upstream end of the sausage casing. In this embodiment, the sausage casing 21 is only a tubular body formed of a flexible material. In other embodiments, see Figures 2 to 4As shown, a protrusion 214 is formed on the quasi-entercise casing 21. Specifically, the quasi-entercise casing 21 includes a quasi-entercise casing body 213 and a protrusion 214 integrally formed on the quasi-entercise casing body 213. The protrusion 214 is located at the upstream end 211 of the quasi-entercise casing body 213, and the clamp 22 can clamp the protrusion 214 to fix it in the intestine 200. In an optional embodiment, the quasi-entercise casing body 213 and the protrusion 214 are integrally formed of the same material. For example, the quasi-entercise casing body is a shaped soft tubular object, not a film, and the protrusion is formed by wrapping multiple layers of the quasi-entercise casing body. In another optional embodiment, the quasi-entercise casing body and the protrusion are connected by a connecting structure, which can be a medical adhesive.

[0052] The protrusion may be a closed annular structure or may be composed of a plurality of lamellae arranged at equal intervals along the circumference. When the casing-like body is in a collapsed state (i.e., when the casing-like body is collapsed within the accommodating cavity), the protrusion may be partially accommodated within the accommodating cavity, or located outside the accommodating cavity. Alternatively, as shown in FIG2 , the protrusion 214 may be entirely accommodated within the accommodating cavity 13.

[0053] Please see Figures 1 to 3 In order to prevent the casing-like body 213 from expanding under the influence of external force when it has not entered the designated position, the protrusion 214 is fixed to the accommodating wall 113 by a clamping structure. In one embodiment, an arc-shaped groove 114 is formed on the accommodating wall 113, and the protrusion 214 is partially located in the arc-shaped groove 114. The arc-shaped groove 114 cooperates with the protrusion 214 to form a clamping structure. In this embodiment, when the anvil assembly 100 reaches the designated position, the protrusion 22 is pushed out of the accommodating cavity 13 by the action of external force. Specifically, a push piece 14 is provided in the accommodating cavity 13, and a through hole 15 for vertical insertion of the push piece 14 is formed on the bottom wall 133 of the accommodating cavity 13. The top of the push piece 14 abuts against the bottom of the protrusion 214, and the push piece 14 pushes the protrusion 214 out of the accommodating cavity 13 under the action of external force. In order to facilitate the operation of the push piece 14, the push piece 14 protrudes out of the anvil surface 111. The length of the push piece 14 protruding from the anvil surface 111 is the distance the protruding portion 214 is pushed out of the accommodating cavity 13. When the protruding portion 214 is pushed out, the bottom of the push piece 12 is immersed in the through hole 15. The through hole 15 can be the original pressure relief hole of the anvil body 10 or a separately opened hole.

[0054] In this embodiment, the protrusion 214 is an annular structure and has a certain elasticity in the radial direction. Therefore, when the push piece 14 pushes the protrusion 214, the protrusion 214 will be slightly deformed inward under the action of the push piece 14 and the accommodating wall 113, so that the protrusion 214 can be disengaged from the arc-shaped groove 114.

[0055] In other embodiments, the retaining structure can also be formed by forming a plurality of spring leaves injection-molded on the accommodating wall at the top of the accommodating cavity. The spring leaves press against the protrusion from above. When the push piece pushes the protrusion toward the outside of the accommodating cavity, the spring leaves bend upward under the action of the protrusion, thereby moving the protrusion out of the accommodating cavity. In this implementation, to prevent the spring leaves from scratching or tearing the sausage-like body after they return to their original shape, the diameter of the sausage-like body is designed to be smaller than the diameter of the inner circle formed by all the spring leaves. Furthermore, the end faces of the spring leaves are passivated.

[0056] In other embodiments, an interference fit may be used between the receiving wall 113 and the protruding portion to define the position of the protruding portion; or, when the casing is folded in the receiving cavity and the protruding portion is completely placed in the receiving cavity, the protruding portion and the receiving wall are connected by a soluble adhesive, wherein the protruding portion and the receiving wall can be completely or partially sealed by a medical soluble adhesive, preferably chitosan, which is soluble in minutes in the weakly acidic environment of the rectum. Medical soluble adhesives include but are not limited to the following materials: polyethylene oxide (PEO) film, low molecular weight polyethylene glycol, gelatin, cold water-soluble polyvinyl alcohol (PVA), etc.

[0057] The protrusion can be located on the inner side of the casing-like body or on the outer side of the casing-like body. When the protrusion is located on the outer side of the casing-like body, it can be set to make the casing-like body fit the intestinal wall as much as possible to avoid setting the protrusion in the path of intestinal fluid and excretion flow, thereby reducing obstruction.

[0058] Please combine Figures 1 to 4 The outer diameter of the annular protrusion 214 is larger than the inner diameter of the intestine 200. The inner diameter of the rectum of an adult is usually 3 cm. In actual applications, the inner diameter of the clamp 10 is set to be larger than 3 cm and smaller than 4 cm. When the device body 10 is placed in the intestine, the protrusion 214 can stretch the intestine 200 outward to facilitate clamping by the clamp 22. The protrusion 214 has an end face (unnumbered) facing outward, specifically, the end face faces the intestinal wall 202. The end face is in the shape of an arc that protrudes outward. By setting the end face to be in the shape of an arc that protrudes outward, it can be prevented that the protrusion 214 pierces or punctures the intestinal wall 202. Of course, in other embodiments, the end face may not be an arc, such as a multi-segment wave structure, or a cone with an arc at the top. The protrusion actually needs to be passivated.

[0059] As mentioned above, the clip 22 is fixed to the protrusion 214 on the outside of the intestine 200. In some embodiments, the clip 22 can be a clamping structure, and the clip 22 can clamp the protrusion 214 in its clamping space 221, or can be clamped on the side wall of the protrusion 214 by the clip 22.

[0060] In one alternative embodiment, please combine Figure 4 and Figure 5 The clip 22 includes a first clamping portion 222 and a second clamping portion 223 for clamping the protruding portion. The first clamping portion 222 and the second clamping portion 223 are connected to form a resilient C-shaped structure. The first clamping portion 222 and the second clamping portion 223 define a clamping space 221, and the protruding portion 214 is restrained within the clamping space 221 by the first clamping portion 222 and the second clamping portion 223. The ends of the first clamping portion 222 and the second clamping portion 223 do not abut the upper and lower side walls of the protruding portion 214.

[0061] In another alternative embodiment, please combine Figure 8 and Figure 9 The protruding portion 214 has an upper side wall 2141 and a lower side wall 2142 that are arranged opposite to each other. The ends of the first clamping portion 222 and the second clamping portion 223 are clamped (held against) on the upper side wall 2141 and the lower side wall 2142. In this embodiment, in order to prevent the clip 22 from falling off, a lower side wall 123 is formed inwardly on the upper side wall 2141 and the lower side wall 2142, and the clamping ends of the first clamping portion 222 and the second clamping portion 223 are embedded in the groove 2143.

[0062] In this embodiment, the protruding portion 214 forms a closed ring, so the first clamping portion 222 and the second clamping portion 223 are clamped on the upper side wall 2141 and the lower side wall 2142. As mentioned above, if the protruding portion 214 is composed of a plurality of arc-shaped blocks, the protruding portion further has a left side wall and a right side wall disposed opposite each other, and the first clamping portion and the second clamping portion can be clamped on the left side wall and the right side wall, respectively. Similarly, grooves can be formed on the left side wall and the right side wall.

[0063] To facilitate clamping and gripping of the protrusion, the protrusion can be configured as a flat structure, with the radial width of the protrusion being greater than its thickness, thereby facilitating gripping. Specifically, when the first clamping portion and the second clamping portion clamp the upper and lower walls, respectively, the thickness direction of the protrusion corresponds to the arrangement direction of the upper and lower walls; when the first clamping portion and the second clamping portion clamp the left and right walls, respectively, the thickness direction of the protrusion corresponds to the arrangement direction of the left and right walls.

[0064] In another alternative embodiment, please refer to Figure 7The clamp 22 includes a first clamping portion 222, a second clamping portion 223, a first force-applying portion 224, and a second force-applying portion 225. The first force-applying portion 224 is connected to the first clamping portion 222, and the second force-applying portion 25 is connected to the second clamping portion 223. The first clamping portion 222 and the second clamping portion 223 are connected to form a clamping space 221, and the first clamping portion 222 and the second clamping portion 223 can relatively clamp the protruding portion 214. The first force-applying portion 224 and the second force-applying portion 225 drive the first clamping portion 222 and the second clamping portion 223 to move relative to each other under the action of an external force. The structure of the clamp 22 can be similar to that of a dovetail clamp.

[0065] In another optional embodiment, the clip 22 may further include a limiter 25 connecting the first force-applying portion 224 and the second force-applying portion 225. The limiter 25 applies an external force to the first force-applying portion 224 and the second force-applying portion 225 to restrict the first clamping portion 222 and the second clamping portion 223 from being in an open state; after the external force is removed, the first clamping portion 222 and the second clamping portion 223 are in a clamped state. The limiter 25 may be a strip-shaped body, attached to the first force-applying portion 224 and the second force-applying portion 225. The strip-shaped body can be directly cut with surgical scissors to improve operability. In addition, the limiter 25 may also be a detachable clip for clamping to the first force-applying portion 224 and the second force-applying portion 225.

[0066] In the embodiment described above, when the ends of the first clamping portion 222 and the second clamping portion are not clamped (abutted) against the side wall of the raised portion, in the clamped state, the first clamping portion 222 and the second clamping portion 223 form a first clamping distance. This first clamping distance is slightly smaller than the sum of the thicknesses of the two layers of intestinal tissue 200 in a relaxed state, and slightly larger than the sum of the thicknesses of the two layers of intestinal tissue 200 in a minimally compressed state. This arrangement prevents necrosis of the clamped tissue.

[0067] In the embodiment where the ends of the first clamping portion 222 and the second clamping portion 223 are clamped against the side wall of the raised portion, in the clamped state, the first clamping portion 222 and the second clamping portion 223 form a first clamping distance. This first clamping distance is slightly smaller than the sum of the thickness of the two layers of intestinal tissue 200 in a relaxed state and the thickness of the protruding portion 214, and slightly larger than the sum of the thickness of the two layers of intestinal tissue 200 in a minimally compressed state and the thickness of the protruding portion 214. The thickness direction of the protruding portion 214 is the clamping direction of the first clamping portion 222 and the second clamping portion 223. This design also prevents necrosis of the clamped tissue.

[0068] Please combine Figure 7The clip 22 can also be a hollow ring with a clamping opening 227 formed inside. The clamping opening 227 extends in the circumferential direction, and the cross-section of the clip 22 is C-shaped. The clip 22 has clamping ends 271 located on either side of the clamping opening 227. The clip 22 can be clamped by clamping the protrusion within its clamping space 221, or the clamping ends 271 can be embedded in the groove 2143. To facilitate installation of the clip 22, the clip 22 has a certain degree of elasticity in the radial direction. Under the action of external force, the radial diameter can be correspondingly increased. After the external force is removed, the radial diameter returns to its original size. The assembly method of the clip is as follows: an outward pulling force is applied to the clip 22 through other surgical instruments, so that the clip 22 opens radially and is then located on the outside of the protrusion, with the clamping opening 271 facing the protrusion; the external force is removed, and the clip 22 slowly returns to its original size. During its recovery process, the protrusion will first abut against the clamping opening 271, and the clamping opening 271 gradually opens under the action of the relative force of the protrusion until the protrusion gradually enters the clamping space 221 through the clamping opening 271. When the protrusion completely enters the clamping space 221, the clamping opening 271 returns to its original state, and the protrusion is confined in the clamping space 221 by the clamping end 271.

[0069] Please combine Figure 2 and Figure 4 Taking the example, the working process of the nail anvil device is described, specifically as follows: Step A, inserting the nail anvil assembly 100 into the intestine 200 until the nail anvil assembly 100 reaches the designated position;

[0070] Step B: Push the push piece 14, thereby causing the push piece 14 to push the protruding portion 214 toward the outside of the receiving cavity 13. When the protruding portion 214 moves out of the receiving cavity 13 and reaches the position where it needs to be clamped, one end of the sausage-like body 213 moves upward along with the protruding portion 214, causing the sausage-like body 213 to slightly expand.

[0071] Step C: The clamp 22 is clamped on the outer wall of the intestine 200 at the position where the protrusion 214 is aligned, clamping the intestine and the protrusion 214 at the same time;

[0072] Step D: docking the anvil assembly 100 with the stapler body, and driving the anvil body 10 toward the stapler body via the closing rod. During the movement of the anvil body 10, the sausage-like body 21 continues to slowly unfold.

[0073] Step E: Activate the anastomosis trigger switch to complete the anastomosis of the intestinal tissue. Activate the stapler release switch, causing the anvil body 10 to move in the opposite direction of the stapler body, separating the anvil body 10 from the stapler body by a small distance, releasing the clamped intestinal tissue and forming an anastomotic stoma 201 within the clamped intestinal tissue. The anvil body 10 then moves out of the intestine 200 along with the stapler body. As the anvil body 10 moves out of the intestine 200, the sausage-like casing body 21 gradually expands and fully expands until it covers the anastomotic stoma 201, thereby isolating the anastomotic stoma 201.

[0074] In this embodiment, the casing-like body 213 is connected to the anvil body 10. The downstream end of the casing-like body 21 is connected to the anvil body 10, and the casing-like body 21 near one end of the anvil body 10 has several fractures (not shown) that can be severed with minimal force. As the anvil body 10 continues to move outward, the fractures cause the casing-like body 213 to separate from the anvil body 10 as the anvil body 10 moves outward, leaving the casing-like body 21 within the intestine 200. In other embodiments, the casing-like body 213 and the anvil body 10 can remain disconnected, meaning they are not connected but only in contact. To avoid removing the clip 22 after the anastomosis 201 is restored, in some embodiments, the clip 22 is made of an absorbable material. The casing-like body 21 is gradually absorbed by the human body tissue, and the casing-like body 21 is no longer positioned in the intestine 200 and can be expelled from the body due to peristalsis of the intestine 200 and excretion. Typically, 4-6 weeks after a rectal anastomosis surgery in the human body, scar tissue at the anastomosis 201 gradually matures, with a tensile strength approaching 70%-80% of that of a normal intestine 200. The anastomosis 201 typically requires 3-6 months to fully recover, during which time the scar is stable, collagen remodeling is complete, and the strength of the anastomosis 201 approaches normal levels. To accommodate the recovery time of the anastomosis 201, the clip 22 is preferably made of a synthetic material with an absorption time of approximately 60-90 days, such as polylactic acid (PLA) or polyglycolic acid (PGA).

[0075] In other embodiments, the intestinal protection component 20 is made of an absorbable material. The casing body is a thin film sleeve with openings at the top and bottom. The casing material is preferably polylactic acid-glycolic acid copolymer (PLGA) or polylactic acid-caprolactone copolymer (PLCL). In order to increase the healing speed of the anastomosis 201, the casing body can be coated with or the casing body can be added with drugs that accelerate wound healing, such as immunomodulators, antibiotics or chemotherapy drugs. The protrusion 214 can be made of a hard material or a flexible material. The hard material is made of a biodegradable metal or a polymer material. The biodegradable metal can be an iron alloy or a magnesium alloy, and the polymer material can be polylactic acid (PLA), polyglycolic acid (PGA), etc. The flexible material includes a flexible polymer material, such as polycaprolactone (PCL) and polylactic acid-caprolactone copolymer (PLCL). The medical adhesive used to connect the protrusion and the casing body includes α-cyanoacrylate, fibrin glue, polyethylene glycol (PEG)-based adhesive, etc. The above materials are only examples. If better materials become available with the development of absorbable materials, they should also be included.

[0076] Figure 10 Another intestinal protection component is shown. The intestinal protection component includes a casing 21, a clasp 25 and a clamp 22. The structure of the casing 21 in this embodiment is similar to that of the intestinal protection component. Figure 4 The structure of the sausage-like casing body is the same as in the embodiment and will not be described in detail here. In this embodiment, the sausage-like casing 21 can be partially folded to form a folded cavity 215. The clip 22 is used to at least partially close the open side of the folded cavity 215, thereby confining the clip 25 within the folded cavity 215 and simultaneously securing the sausage-like casing 2121 within the intestine 200.

[0077] The clasp 25 has a certain hardness in the radial direction, so that the clasp 25 can keep the sausage-like casing 21 and the intestine 200 part that fits with it in an open state. Generally speaking, the opening formed by the sausage-like casing 21 that fits with the clasp 25 is always not less than 3 cm. After the intestinal protection component 20 is placed in the intestine 200, according to the flow direction of intestinal fluid and excrement in the intestine 200 ( Figure 10 The sausage-like casing 21 has two openings disposed opposite each other. When the intestinal protection assembly 20 is placed in the intestine 200, the two openings can be defined as an upstream end 211 and a downstream end 212 disposed opposite each other. Intestinal fluid and excreta flow in the direction in which they enter the sausage-like casing 21 through the upstream end 211. In this embodiment, a clasp 25 is disposed on the upstream end 211. The upstream end 211 of the sausage-like casing 21 is folded to form a folding cavity 215.

[0078] In another embodiment, the clasp 25 can be made of a flexible material, while the positioning member 30 has a certain hardness in the radial direction. In this way, when the positioning member 30 secures the clasp 25, it can fix the clasp 25 in the radial direction, ensuring that the clasp 25 and the portion of the sausage-like casing 21 that engages the clasp 25 remain in an expanded state. Generally speaking, the opening formed by the portion of the sausage-like casing 21 that engages the clasp 25 is always no less than 3 cm.

[0079] The clasp 25 can be made of an absorbable material. If the clasp 25 is made of a hard material, the hard material can be a biodegradable metal or a polymer material. The biodegradable metal can be an iron alloy, a magnesium alloy, etc., and the polymer material can be polylactic acid (PLA), polyglycolic acid (PGA), etc.; if the clasp 25 is made of a flexible material, the flexible material includes a flexible polymer material, such as polycaprolactone (PCL) and polylactic acid-caprolactone copolymer (PLCL).

[0080] Figure 10 The clip structure shown in Figure 4 The clamp structure is the same as that shown in , and in addition, it can also adopt the clamp structure of other structures described above. In this intestinal protection component, the clamp 25, the part of the folded cavity 215 formed by the sausage-like casing 21, and the folded part corresponding to the intestine 200 are all located in the clamping space 221 of the clamp 22. The clamp 25, the folded sausage-like casing 21 and the intestine enter into the clamping space 31 through the clamping port 227. The clamping port 217 has a first state and a second state. In the first state, the clamp 25 and a part of the sausage-like casing 21 enter into the clamping space 31 through the clamping port 217; in the second state, the clamp 25 and a part of the sausage-like casing 21 are confined in the clamping space 31.

[0081] By limiting the clamping opening 217, the clasp 25 and the sausage-like casing 21 can be prevented from being separated from the clamping space 31. Specifically, in the second state, the width of the clamping opening 217 is less than the thickness of the clasp 25. In order to avoid damaging the blood supply of the intestinal 200 tissue, generally speaking, in the second state, the width of the clamping opening 217 is equal to or slightly greater than the sum of the thickness of the double-layer intestinal 200 tissue and the thickness of the two layers of sausage-like casing 21. Generally speaking, the thickness of the single-layer wall of the adult rectum is about 1mm-4mm, and the thickness of the sausage-like casing 21 is 1-3mm. In order to prevent the edge of the clamping opening 217 from causing friction between the positioning member and the intestine 200 during intestinal peristalsis and forming a wound on the outside of the intestine, in actual application, the edge of the clamping opening 217 is passivated, that is, the end 38 of the positioning member 30 is passivated.

[0082] Please combine Figure 11 , Figure 10The intestinal protection component shown is placed on the anvil body 10 to form an anvil device. The anvil body structure can adopt an existing structure. The casing 21 is in a folded state and is placed on the side 115 of the anvil head 11. In a conventional setting, the cross section of the anvil head 11 is usually truncated cone, for example Figure 11 As shown, the diameter of the upper half of the anvil head 11 is the same as that of the lower half. Thus, after the casing 21 is sleeved onto the side 115 of the anvil head 11, the inner diameter of the casing 21 can be set to be larger than the diameter of the upper half of the anvil head 11 and smaller than the diameter of the lower half of the anvil head 11. Thus, the casing 21 can be sleeved onto the upper half of the anvil head 11, and its bottom will be supported by the side 115 of the lower part of the anvil head 11, so that the casing 21 can be folded onto the anvil head 11. In actual applications, a receiving cavity can be formed on the side 115 to facilitate the placement of the casing. In other embodiments, it can also be as shown in FIG. Figure 2 As shown, a receiving cavity is formed above the anvil head 11 to receive the casing. The receiving cavity can be completely or partially sealed with a medical soluble film.

[0083] by Figure 10 For the assembled state diagram, please combine Figure 11 The method of using the nail anvil device equipped with the intestinal protection component is as follows:

[0084] Step A: inserting the anvil assembly 100 into the intestine 200 until the anvil assembly 100 reaches a designated position;

[0085] Step B: Use other medical instruments (such as tweezers) to drag the upstream end 211 of the sausage-like casing 21 to the top of the position where it needs to be clamped, so that the sausage-like casing 21 is in an unfolded state. Then place the clasp 25 inside the sausage-like casing 21 and move it to the position where it needs to be clamped. Then fold the upstream end 211 of the sausage-like casing 21 inward to form a folded cavity 215. At this time, the clasp 25 is accommodated in the folded cavity 215.

[0086] Step C: The clamp 22 clamps the outer wall of the intestine 200 at the position where the clasp 25 is aligned, so that the clamp 22 clamps the clasp 25. At this time, the intestine 200 in this portion is also folded, and the intestine 200 and the sausage-like casing 21 are simultaneously clamped by the clamp 22 into the clamping space 221.

[0087] Step D: docking the anvil assembly 100 with the stapler body, and driving the anvil body 10 toward the stapler body via the closing rod. During the movement of the anvil body 10, the sausage casing 21 continues to slowly unfold.

[0088] Step E: Activate the anastomosis trigger switch to complete the anastomosis of the intestinal tissue. Activate the stapler release switch, and the anvil body 10 moves in the opposite direction of the stapler body, separating the anvil body 10 and the stapler body by a small distance, releasing the clamped intestinal tissue. An anastomotic opening 201 is formed in the clamped intestinal tissue. The anvil body 10 moves out of the intestine 200 along with the stapler body. As the anvil body 10 moves out of the intestine 200, the quasi-sausage casing 21 is gradually unfolded and fully unfolded. In this embodiment, the quasi-sausage casing 21 and the anvil body 10 can be connected in an initial state (before the quasi-sausage casing 21 is folded and not attached to the intestine). The downstream end of the quasi-sausage casing 21 is connected to the anvil body 10, and the quasi-sausage casing 21 near one end of the anvil body 10 has a plurality of fractures (not shown) that can be severed by slight force. As the anvil body 10 continues to move outward, the dummy casing 21 is disconnected from the anvil body 10 due to the presence of the fracture, and the dummy casing 21 is left in the intestine 200. In other embodiments, the dummy casing and the anvil body may remain disconnected, that is, the dummy casing and the anvil body are not connected but only in contact.

[0089] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0090] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A nail anvil device, characterized in that: include: An anvil body, comprising an anvil head and an anvil rod disposed on the anvil head, wherein the anvil head has an anvil surface formed with a plurality of nail pits, and the axis of the anvil rod is perpendicular to the anvil surface; and The intestinal protection component is located on the side of the anvil head away from the anvil surface, and includes a casing and a clamp. The casing is loaded on the anvil body and is tubular. The clamp can clamp the casing to fix the casing in the intestine.

2. The nail anvil device according to claim 1, characterized in that The sausage-like casing further comprises a sausage-like casing body and a protruding portion integrally formed on the sausage-like casing body; the clip can fix the protruding portion in the intestine.

3. The nail anvil device according to claim 2, characterized in that: The anvil head is formed with an accommodating cavity on a side facing away from the anvil surface, and the casing-like body can be folded in the accommodating cavity, or, when the casing-like body is folded in the accommodating cavity, the protruding portion is at least partially located in the accommodating cavity; or, The protruding portion and the casing-like body are both located on the outside of the anvil head. The anvil head has a side surface connecting the top surface and the anvil surface, and the protruding portion is attached to the side surface.

4. The nail anvil device according to claim 3, characterized in that: The anvil head and the protruding portion are fixed via a clamping structure; or, the anvil head and the protruding portion are interference fit; or, the protruding portion and the anvil head are connected via soluble glue.

5. The anvil device according to claim 1, wherein: The intestinal protection assembly also includes a clasp, The casing-like portion can be folded in half to form a folded cavity, and the clip is used to at least partially close the open side of the folded cavity to confine the clip in the folded cavity and simultaneously fix the casing-like portion in the intestine.

6. The anvil device according to claim 5, characterized in that: The sausage casing is in a folded state and is sleeved on the side of the anvil head.

7. The anvil device according to claim 1, wherein: The sausage-like casing comprises a tubular structure formed of a flexible material. The sausage-like casing has an upstream end and a downstream end that are oppositely disposed. The clip is disposed at the upstream end.

8. The nail anvil device according to claim 1, characterized in that: The clip is a hollow ring structure with an opening formed on the inner side.

9. The nail anvil device according to claim 1, characterized in that: The clamp includes a first clamping portion and a second clamping portion; the first clamping portion and the second clamping portion can move relative to each other to switch between an open position and a closed position; in the open position and the closed position, the clamping space is formed between the first clamping portion and the second clamping portion.

10. The anvil device according to claim 9, wherein: The first clamping portion and the second clamping portion are connected to form an elastic C-shaped structure.

11. The anvil device according to claim 9, wherein: The clip also includes a first force-applying portion and a second force-applying portion connected to the first clamping portion and the second clamping portion respectively; the first force-applying portion and the second force-applying portion drive the first clamping portion and the second clamping portion to switch between an open position and a closed position under the action of an external force.

12. The anvil device according to claim 11, wherein: The clip further includes a limiting member; The limiting member applies external force on the first force applying portion and the second force applying portion to limit the first clamping portion and the second clamping portion to remain in the open position; after the external force is removed, the first clamping portion and the second clamping portion remain in the closed position.

13. The anvil device according to claim 1, wherein: The clip is made of absorbable material.

14. The anvil device according to claim 13, wherein: The intestinal protection component is made of absorbable material.

15. A stapler, characterized in that: The invention comprises the anvil device according to any one of claims 1 to 14 and a stapler body capable of performing anastomosis with the anvil device.

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