Tissue closure devices and medical devices

Abstract

The present invention provides a tissue closing device and a medical device, belonging to the field of medical devices, comprising a first clamp seat, a second clamp seat, a firing assembly, and a driving mechanism. When the second clamp seat is closed, the second clamp seat cooperates with the first clamp seat to form a compression chamber and a molding chamber that are interconnected: the height of the molding chamber is greater than the height of the compression chamber; the firing assembly comprises a compression block and a firing block that are separately arranged, the firing block is located at the proximal end of the compression block, and the compression block is provided with a compression portion and a yield portion that penetrates the compression portion. After the compression block moves to the firing position, when the firing block continues to move toward the molding chamber, at least part of the structure of the firing block passes through the yield portion and enters the molding chamber; on the one hand, the tubular tissue in the compression chamber is completely gathered into the molding chamber by the compression block in advance, so that the volume of the formed purse is smaller, and a clustered purse with a tightened center can be formed, which is more convenient for being subsequently accommodated in a tubular device; on the other hand, the accommodating space of the molding chamber is increased to better accommodate the tissue.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a tissue closure device and a medical device. Background Art

[0002] In the existing digestive tract anastomosis surgery, generally a linear or curved stapler is first used to perform multi-angle segmentation and anastomosis on the tubular tissue, and then a circular tubular stapler is used to perform docking and anastomosis on the segmented tissue.

[0003] However, the linear or arc-shaped staplers in the prior art cannot form a centrally tightened clustered purse. Moreover, the anastomotic opening formed by the existing linear staplers after firing is linear, which cannot shrink the purse small enough and makes it difficult to completely retract the purse into the inner cavity of the stapler barrel of the circular stapler.

[0004] Therefore, it is necessary to provide a new tissue closure device and medical instrument to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a tissue closing device and a medical instrument.

[0006] To achieve the above-mentioned invention objectives, the present invention adopts the following technical solutions: a tissue closing device, comprising a first clamp seat, a second clamp seat that can be opened and closed relative to the first clamp seat, a firing assembly, and a driving mechanism for driving the firing assembly, when the second clamp seat is closed, the second clamp seat cooperates with the first clamp seat to form a compression chamber and a molding chamber that are interconnected, the molding chamber is located at the distal end of the compression chamber, the firing assembly has an initial position located at the proximal end of the compression chamber and a firing position located at the distal end of the compression chamber, and the height of the molding chamber is greater than the height of the compression chamber; the firing assembly comprises a compression block and a firing block that are separately arranged, the firing block is located at the proximal end of the compression block, and a compression portion and a yield portion that penetrates the compression portion are provided on the compression block, after the compression block moves to the firing position, when the firing block continues to move toward the molding chamber, at least part of the structure of the firing block passes through the yield portion and enters the molding chamber.

[0007] As a further improved technical solution of the present invention, the first clamping seat and the second clamping seat are both provided with a clamping surface, and the clamping surface includes a compression clamping surface corresponding to the compression cavity and a molding clamping surface corresponding to the molding cavity, and the compression clamping surface is closer to the center line of the tissue closure device than the molding clamping surface.

[0008] As a further improved technical solution of the present invention, the molding clamping surface is provided with a plurality of spaced protrusions protruding into the molding cavity, and the protrusions on two molding clamping surfaces are staggered along the longitudinal direction of the tissue closure device.

[0009] As a further improved technical solution of the present invention, at least one of the first clamp seat and the second clamp seat is provided with a stop portion, and when the compression block is located at the firing position, the compression portion stops at the stop portion.

[0010] As a further improved technical solution of the present invention, the first clamp seat is provided with a first sliding groove extending from the proximal end to the distal end of the first clamp seat, the second clamp seat is provided with a second sliding groove extending from the proximal end to the distal end of the second clamp seat, and the compression block slides in cooperation with the first sliding groove and the second sliding groove; the compression part is provided with a first pressing plate acting on the side of the first clamp seat away from the second clamp seat, and a second pressing plate acting on the side of the second clamp seat away from the first clamp seat; the first pressing plate, the second pressing plate and the compression part drive the second clamp seat to close.

[0011] As a further improved technical solution of the present invention, the driving mechanism includes a driving rod which is arranged on the first clamping seat and extends from the proximal end to the distal end, and the driving rod includes a driving section; the compression block and the firing block have a first state of synchronous movement and a second state of asynchronous movement; in the first state, the compression block and the firing block cooperate with the driving section at the same time, and in the second state, one of the compression block and the firing block cooperates with the driving section.

[0012] As a further improved technical solution of the present invention, the drive rod further includes a non-drive section located at the distal end of the drive section, and after the compression block is located at the firing position, the compression block cooperates with at least a portion of the non-drive section.

[0013] As a further improved technical solution of the present invention, the driving rod is a screw rod, the driving section of the screw rod is provided with threads, and the firing assembly is threadedly connected to the screw rod.

[0014] As a further improved technical solution of the present invention, the firing assembly also includes at least one linkage member; the proximal end of the linkage member is connected to the firing block, and the distal end is connected to the compression block; the linkage member drives the compression block and the firing block from the second state to the first state.

[0015] As a further improved technical solution of the present invention, the linkage part is movably connected to the firing assembly, and the linkage part includes a connecting rod extending from the proximal end to the distal end, and anti-slip parts arranged at both ends of the connecting rod, and the firing assembly is provided with a through groove for the connecting rod to pass through.

[0016] As a further improved technical solution of the present invention, the firing block includes a nail pushing piece and a cutter connected to the nail pushing piece and protruding toward the distal direction, and at least one staple arranged at the distal end of the nail pushing piece; the yielding portion includes a nail guide groove for the staple and part of the nail pushing piece to pass through, and a knife guide groove for the cutter to pass through.

[0017] As a further improved technical solution of the present invention, one of the distal ends of the first clamp seat and the second clamp seat is provided with a locking piece, and the other is provided with a matching portion matching with the locking piece; the locking piece matches with the matching portion from the proximal end of the matching portion.

[0018] To achieve the purpose of the above invention, the present invention also provides a medical device, including a device body, the above tissue closure device detachably connected to the distal end of the device body, and a firing device connected to the device body to act on the tissue closure device.

[0019] The beneficial effects of the present invention are as follows: the tissue closing device of the present invention, on the one hand, completely gathers the tubular tissue in the compression cavity into the molding cavity through the compression block in advance, so that the volume of the formed purse is smaller, thereby finally being able to form a centrally tightened clustered purse, which is more convenient to be subsequently accommodated in a tubular device; on the other hand, the height of the molding cavity is greater than the height of the compression cavity, thereby increasing the accommodating space of the molding cavity and better accommodating the tubular tissue, so as to avoid the tubular tissue being unable to be completely accommodated in the molding cavity 20 due to insufficient accommodating space of the molding cavity, and even after the compression block continues to compress the tissue, the second clamp seat opens under the accumulation of the tubular tissue in the molding cavity, causing the molding cavity to have an opening, affecting the anastomosis effect of the tubular tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the tissue closure device in the present invention.

[0021] Figure 2 yes Figure 1 An exploded view of the first clamp seat and the second clamp seat in the tissue closing device is shown.

[0022] Figure 3 yes Figure 1 The structure diagram of the tissue closing device shown is a schematic diagram after the first clamping seat and the second clamping seat are removed.

[0023] Figure 4 yes Figure 3 Exploded diagram of .

[0024] Figure 5 yes Figure 1The schematic diagram of the structure when the compression block in the tissue closing device is in the initial position is shown.

[0025] Figure 6 yes Figure 5 Sectional view along AA direction.

[0026] Figure 7 yes Figure 5 Cross-sectional view along the BB direction.

[0027] Figure 8 yes Figure 1 The structure diagram of the compression block in the tissue closure device during the switching process from the initial position to the compressed position is shown.

[0028] Fig. 9 yes Figure 8 Cross-sectional view along CC direction.

[0029] Fig.10 yes Figure 1 The schematic diagram of the structure of the tissue closing device when the compression block is in the compression position is shown.

[0030] Fig.11 yes Fig.10 Cross-sectional view along DD direction.

[0031] Fig.12 yes Fig.10 Cross-sectional view along the EE direction.

[0032] Fig.13 yes Figure 1 The structure diagram of the staple pusher assembly in the tissue closure device is shown in the firing position.

[0033] Fig.14 yes Fig.13 Cross-sectional view along the FF direction.

[0034] Fig.15 yes Fig.13 Cross-sectional view along the GG direction.

[0035] Fig.16 yes Figure 1 The structure diagram of the compression block in the tissue closure device during the switching process from the compression position to the initial position is shown.

[0036] Fig.17 yes Fig.16 Cross-sectional view along the HH direction.

[0037] Fig.18 yes Fig.16 Cross-sectional view along line II.

[0038] Fig.19It is a schematic structural diagram of a tissue closing device in another embodiment of the present invention.

[0039] Fig. 20 yes Fig.19 Cross-sectional view along the JJ axis. DETAILED DESCRIPTION

[0040] The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. Figures 1 to 20 It is shown as a preferred embodiment of the present invention. However, it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformation or replacement of functions, methods, or structures made by ordinary technicians in the field according to these embodiments shall fall within the protection scope of the present invention.

[0041] The words expressing position and direction described in the present invention are all based on the instrument operator as a reference, the end close to the instrument operator is the proximal end, and the end away from the instrument operator is the distal end; the longitudinal / axial direction in the present invention refers to the length direction of the component, and the transverse direction refers to the direction perpendicular to the longitudinal / axial direction; at the same time, it should be noted that unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, the connection can be a direct connection or an indirect connection through an intermediate medium, and can be a fixed connection, a movable connection, a detachable connection, or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Please refer to Figures 1 to 20 As shown, the present invention provides a tissue closing device 100 and a medical device having the tissue closing device 100 , and the medical device can be used in anastomosis surgery of the digestive tract.

[0043] The medical device includes an instrument body, a firing handle connected to the instrument body, and a tissue closing device 100 detachably connected to the instrument body. After the tissue closing device 100 is connected to the instrument body, the firing handle directly or indirectly acts on the tissue closing device 100 to drive the tissue closing device 100 to anastomose and / or cut the tubular tissue.

[0044] The structure of the instrument body may follow the structure of the existing linear stapler, or may be designed separately. It is understandable that the structure of the instrument body only needs to be able to cooperate with the tissue closure device 100 of the present invention. For example, the tissue closure device 100 may be driven to staple and / or cut tubular tissue, which will not be described in detail herein.

[0045] Generally, the tissue closing device 100 is disposed at the distal end of the instrument body. The tissue closing device 100 will be described in detail below.

[0046] The tissue closing device 100 includes a first clamping seat 1 , a second clamping seat 2 that can be opened and closed relative to the first clamping seat 1 , a firing assembly 3 that acts on a tubular tissue, and a driving mechanism 4 that drives the firing assembly 3 .

[0047] Please refer to Figure 1-Figure 2 As shown, the first clamp seat 1 includes a first clamp seat body 11 and a connecting portion 12 connected to the proximal end of the first clamp seat body 11 , wherein the connecting portion 12 is used to connect to the instrument body to connect the tissue closing device 100 to the instrument body.

[0048] While the connecting portion 12 is connected to the instrument body, the components that need to be controlled in the tissue closing device 100 (such as the driving mechanism 4) are associated with the firing handle, so that the firing handle can directly or indirectly act on the tissue closing device 100 to drive the tissue closing device 100 to anastomose and / or cut the tubular tissue.

[0049] The proximal end of the second clamp seat 2 is rotatably connected to the first clamp seat 1. When the second clamp seat 2 is opened, it is convenient to put the tubular tissue to be anastomosed and cut into the tissue closure device 100; after the second clamp seat 2 is closed, the tubular tissue is located in the accommodating cavity formed by the second clamp seat 2 and the first clamp seat 1, which is convenient for subsequent anastomosis and cutting.

[0050] Specifically, the proximal end of the second clamping seat 2 is rotatably connected to the distal end of the connecting portion 12 .

[0051] After the second clamping seat 2 is closed, the second clamping seat 2 cooperates with the first clamping seat 1 to form a compression cavity 10 and a molding cavity 20 that are interconnected, and the molding cavity 20 is located at the far end of the compression cavity 10. That is, the above-mentioned receiving cavity includes the compression cavity 10 and the molding cavity 20.

[0052] The firing assembly 3 has an initial position located at the proximal end of the compression chamber 10 and a firing position located at the distal end of the compression chamber 10. The driving mechanism 4 is used to drive the firing assembly 3 to move longitudinally along the tissue closing device 10 and switch between the initial position and the firing position.

[0053] When the firing assembly 3 is in the initial position, the second clamp seat 2 is opened relative to the first clamp seat 1 to facilitate the inclusion of tubular tissue. Further, the firing assembly 3 includes a compression block 31 and a firing block 32 which are separately arranged, the firing block 32 is located at the proximal end of the compression block 31, and the compression block 31 is provided with a compression portion and a yield portion penetrating the compression portion.

[0054] Specifically, the firing block 32 is located at the proximal end of the compression block 31 , which can be understood as the firing block 32 being close to the compression block 31 , or a suitable distance being provided between the firing block 32 and the compression block 31 , so as to obtain a better staple closing effect.

[0055] During the process of the firing assembly 3 moving from the initial position to the firing position, the compression block 31 first gradually gathers the tubular tissue in the compression chamber 10 into the forming chamber 20, and then the firing block 32 continues to move toward the forming chamber 20, and at least a portion of the firing block 32 passes through the yielding portion into the forming chamber 20, and performs anastomosis and cutting on the tubular tissue in the forming chamber 20 to form a centrally tightened and smaller cluster purse. When the circular tubular stapler is used subsequently, the tubular tissue is not easy to slip off under the action of external force, and the cluster purse can be completely received in the inner cavity of the stapler barrel of the circular tubular stapler and completely removed, thereby reducing the risk of "cat ears" and fistulas after surgery.

[0056] In this embodiment, the clearance portion is a guide groove 33 that penetrates the compression block 31 from the proximal end to the distal end, so that at least a part of the structure of the firing block 32 can pass through the compression block 31 to perform anastomosis and cutting on the tubular tissue in the molding cavity 20. Of course, this is not limited to this.

[0057] It can be understood that the firing assembly 3 is located in the initial position, which means that the compression block 31 and the firing block 32 are both located in the initial position; when the firing assembly 3 is located in the firing position, the compression block 31 completely retracts the tubular tissue in the compression chamber 10 into the forming chamber 20, and at the same time, the firing block 32 completes the anastomosis cutting of the tubular tissue located in the forming chamber 20.

[0058] Further, combined with Figure 1 , Figure 7 As shown, the height of the molding cavity 20 is greater than the height of the compression cavity 10, so as to increase the accommodation space of the molding cavity 20 and better accommodate the tubular tissue, thereby avoiding the tubular tissue from being unable to be completely accommodated in the molding cavity 20 due to insufficient accommodation space of the molding cavity 20, and even after the tissue is further compressed, the second clamp seat 2 opens due to the accumulation of the tubular tissue in the molding cavity 20, causing the molding cavity 20 to open, resulting in the overflow of the tubular tissue and affecting the anastomosis effect.

[0059] The first clamping seat 1 and the second clamping seat 2 are both provided with clamping surfaces, and the two clamping surfaces together form the receiving cavity to clamp the tubular tissue.

[0060] The clamping surface includes a compression clamping surface corresponding to the compression cavity 10 and a molding clamping surface corresponding to the molding cavity 20. It can be understood that the height of the molding cavity 20 refers to the distance between the two molding clamping surfaces, and the height of the compression cavity 10 refers to the distance between the two compression clamping surfaces.

[0061] Specifically, the first clamping seat 1 has a first clamping surface 16, which includes a first compression clamping surface 161 corresponding to the compression chamber 10 and a first molding clamping surface 162 corresponding to the molding chamber 20. The first compression clamping surface 161 is closer to the center line of the tissue closure device 100 relative to the first molding clamping surface 162, thereby increasing the height of the molding chamber 20 on one side of the first clamping seat 1 and increasing the accommodating space of the molding chamber 20; at the same time, providing installation space for the screw 41.

[0062] The second clamping seat 2 has a second clamping surface 22, which includes a second compression clamping surface 221 corresponding to the compression chamber 10 and a second molding clamping surface 222 corresponding to the molding chamber 20. The second compression clamping surface 221 is closer to the center line of the tissue closure device 100 relative to the second molding clamping surface 222, thereby increasing the height of the molding chamber 20 on one side of the second clamping seat 1 and further increasing the accommodating space of the molding chamber 20 to avoid an opening of the molding chamber 20 due to insufficient accommodating space of the molding chamber 20, causing the tubular tissue to overflow.

[0063] Furthermore, the first clamp seat 1 is provided with a first slide groove 13 extending from the proximal end to the distal end of the first clamp seat 1, and the compression block 31 is slidably connected in the first slide groove 13. The driving mechanism 4 drives the compression block 31 to move along the first slide groove 13 to move the compression block 5 between the initial position and the firing position.

[0064] At the same time, the second clamp seat 2 is provided with a second slide groove 21 extending from the proximal end to the distal end of the second clamp seat 2. After the second clamp seat 2 is closed, the compression block 31 can move along the second slide groove 21. During the movement of the compression block 31, the first slide groove 13 and the second slide groove 21 respectively limit the compression block 31 from the opposite ends of the compression block 31, thereby enhancing the stability of the movement of the compression block 5.

[0065] Furthermore, the second sliding groove 21 penetrates the second clamping seat 2 along the height direction of the second clamping seat 2 , and the first sliding groove 13 penetrates the first clamping seat 1 along the height direction of the first clamping seat 1 .

[0066] The tissue closing device 100 also includes a first pressing plate 5 connected to an end of the compression portion corresponding to the first clamp seat 1, and a second pressing plate 6 connected to an end of the compression portion corresponding to the second clamp seat 2. The first pressing plate 5 acts on a side of the first clamp seat 1 away from the second clamp seat 2, and the second pressing plate 6 is located on a side of the second clamp seat 2 away from the first clamp seat 1. During the process of the compression block 31 moving from the initial position to the firing position, the first pressing plate 5, the second pressing plate 6 and the compression portion work together to drive the second clamp seat 2 to close, and after the compression block 31 is located at the firing position, the second clamp seat 2 can be kept in a closed state to prevent the opening between the second clamp seat 2 and the first clamp seat 1 from increasing, resulting in tubular tissue overflow.

[0067] In the present invention, the height direction refers to a direction perpendicular to the axial direction, that is, it can be understood as a direction perpendicular to the first clamping seat 1 .

[0068] The first pressing plate 5, the compression part and the second pressing plate 6 together form an "I"-shaped structure. The "I"-shaped structure is used to drive the second clamping seat 2 to switch from open to closed, which is a common structure in the field and will not be described here.

[0069] At the same time, a structure similar to a spring sheet may be provided to act on the proximal end of the second clamp seat 2. When the compression block 31 moves to the initial position in the proximal direction, the distal end of the second clamp seat 2 is driven away from the first clamp seat 1, so that the second clamp seat 2 is opened and maintained in an open state. This technology is also a common technology in this field and will not be described in detail here.

[0070] Furthermore, at least one of the first clamp seat 1 and the second clamp seat 2 is provided with a stop portion, and after the driving mechanism 4 drives the compression block 31 to move to the firing position, the compression portion stops at the stop portion, that is, the stop portion prevents the compression portion from continuing to move in the distal direction, thereby preventing excessive compression of the tubular tissue and even causing an increase in the opening between the first clamp seat 1 and the second clamp seat 2.

[0071] In a specific embodiment, the first clamp seat 1 and the second clamp seat 2 are both provided with the stop portion, which are respectively the first stop portion 19 located on the first clamp seat 1 and the second stop portion 24 located on the second clamp seat 2. After the compression block 31 is located at the firing position, the first pressing piece 5 is located at the first stop portion 19, and the second pressing piece 6 is stopped at the second stop portion 24 to prevent the compression portion from continuing to move in the distal direction. Of course, this is not limited to this. It can be understood that the stop portion can be provided only on the first clamp seat 1 or the second clamp seat 2, or the stop portion directly matched with the compression portion can be provided, as long as the compression block 31 can be prevented from entering the molding cavity 20.

[0072] Specifically, a pressing plate groove for the second pressing plate 6 to move is concavely provided on the side of the second clamping seat 2 away from the first clamping seat 1, and the distal end of the pressing plate groove is in a step shape. At this time, the second stop portion 24 is the distal end of the pressing plate groove, so that the outer diameter of the tissue closure device is not increased, the surgical device can be smoothly inserted, and the patient's pain will not be increased. It can be understood that the distal end of the pressing plate groove is located on the side of the second clamping seat away from the second molded clamping surface 222, that is, the second stop portion 24 is located on the side of the second clamping seat away from the second molded clamping surface 222, and of course, it is not limited to this.

[0073] It is understandable that the structure of the first stop portion 19 may follow the structure of the second stop portion 24 , and of course, may also be configured separately, as long as the compression block 31 can be prevented from entering the molding cavity 20 .

[0074] Furthermore, in the present embodiment, the compression block 31 and the firing block 32 have a first state of synchronous movement and a second state of asynchronous movement. Of course, this is not limiting, the compression block 31 and the firing block 32 may also be in the second state of asynchronous movement, that is, the drive mechanism 4 may be designed to first drive the compression block 31 alone to switch from the initial position to the firing position, so as to completely gather the tubular tissue in the compression chamber 10 into the molding chamber 20, and then drive the firing block 32 alone to move from the initial position to the molding chamber 20, so as to perform anastomosis cutting on the tubular tissue in the molding chamber 20, and finally form a centrally tightened cluster purse. The structure of the drive mechanism 4 may adopt an existing drive structure, as long as it can realize the driving of the compression block 31 and the firing block 32, and no further details will be given here.

[0075] In a specific embodiment, during the movement of the firing assembly 3 from the initial position to the firing position, the driving mechanism 4 first drives the compression block 31 and the firing block 32 to move synchronously, and after the compression block 31 completely compresses the tubular tissue in the compression cavity 10 into the forming cavity 20, the firing block 32 is driven alone to continue to move toward the forming cavity 20. Accordingly, after the firing is completed, during the movement of the firing assembly 3 from the firing position to the initial position, the driving mechanism 4 first drives the firing block 32 alone to move toward the proximal direction, and then drives the compression block 31 and the firing block 32 to move synchronously toward the proximal direction to the initial position. It can be understood that the process in which the driving mechanism 4 drives the compression block 31 and the firing block 32 simultaneously is the first state; the process in which the driving mechanism 4 drives the compression block 31 or the firing block 32 alone is the second state.

[0076] Of course, this is not limited to the above. In the process of the firing assembly 3 moving from the initial position to the firing position, the compression block 31 may be driven to move in the distal direction, and then the compression block 31 and the firing block 32 may be driven to move synchronously, until the compression block 31 completely compresses the tubular tissue in the compression cavity 10 into the molding cavity 20, and then the firing block 32 is driven to continue to move toward the molding cavity 20. It is understandable that as long as the tubular tissue in the compression cavity 10 can be completely compressed into the molding cavity 20 by the compression block 31, and then the tubular tissue in the molding cavity 20 can be anastomosed and cut by the firing block 32, it will be sufficient.

[0077] The driving mechanism 4 includes a driving rod that passes through the first clamping seat 1 and extends from the proximal end to the distal end. The firing assembly 3 is connected to the driving rod so that the firing assembly 3 is driven by the driving rod to move along the first sliding groove 13 and the second sliding groove 21. The structure is simple.

[0078] Furthermore, the driving rod includes a driving section. It can be understood that, in the first state, the compression block 31 and the firing block 32 cooperate with the driving section at the same time, so that the compression block 31 and the firing block 32 can move synchronously; in the second state, the compression block 31 and one of the firing blocks 32 cooperate with the driving section to drive the compression block 31 or the firing block 32 that cooperates with the driving section to move separately, so that relative movement can be generated between the compression block 31 and the firing block 32.

[0079] Please refer to Figure 3-Figure 5As shown, in a specific embodiment, the driving rod is a screw 41, the driving section 412 of the screw 41 is provided with a thread, and the firing assembly 3 is threadedly connected to the screw 41. When the screw 41 rotates, the firing assembly 3 is driven to move along the first slide groove 13 and the second slide groove 21.

[0080] Of course, the driving mechanism 4 is not limited to the screw 41. Other existing driving mechanisms that can drive the firing assembly 3 to switch between the initial position and the firing position through its own linear movement are also within the protection scope of the present invention, such as rack and pinion driving mechanisms, etc., which will not be repeated here.

[0081] As is known, the different rotation directions of the screw rod 41 can drive the firing assembly 3 to move in different directions. For the convenience of subsequent description, a specific description will be given by taking the example that when the screw rod 41 rotates in the forward direction, it drives the firing assembly 3 to move in the distal direction, that is, it drives the firing assembly 3 to move from the initial position to the firing position; when the screw rod 41 rotates in the reverse direction, it drives the firing assembly 3 to move in the proximal direction, that is, it drives the firing assembly 3 to move from the firing position to the initial position.

[0082] In this embodiment, the screw rod 41 also includes a non-driving section 413 located at the distal end of the driving section 412. When the firing assembly 3 is located at the initial position, at least part of the structure of the firing block 32 and the compression block 31 cooperate with the driving section 412. When the screw rod 41 rotates forward, the firing block 32 and the compression block 31 are driven to move synchronously to the firing position. After the compression block 31 completely compresses the tubular tissue in the compression chamber 10 into the molding chamber 20, the compression block 31 is separated from the driving section 412 and cooperates with at least part of the non-driving section 413. At this time, the firing block 32 is still coordinated with the driving section 412, and the screw rod 41 continues to rotate forward to drive the firing block 32 to continue to move toward the molding chamber 20, so as to achieve the anastomotic cutting of the tubular tissue in the molding chamber 20 and form a centrally tightened cluster purse.

[0083] It can be understood that when the compression block 31 is fully matched with the non-driving section 413, no matter whether the screw 41 continues to rotate forward or reverse, it cannot drive the compression block 31 to move axially along the tissue closure device 100, so that the tubular tissue gathered in the forming cavity 20 always remains in a gathered state.

[0084] For details, please refer to Figure 3-Figure 4As shown, in this embodiment, the surface of the non-driving section 413 is in a non-threaded state, for example, a smooth surface, so that after the compression block 31 is located in the non-driving section 413, the screw 41 continues to rotate and will not drive the compression block 31 to move.

[0085] In another embodiment, a thread may also be provided on the surface of the non-driving section 413, as long as the thread does not match the thread on the compression block 31, for example, the major diameter of the thread is smaller than the minor diameter of the thread on the compression block 31, or the pitch of the thread does not match the pitch of the thread of the compression block 31, etc., so that the compression block 31 located in the non-driving section 413 is no longer driven by the screw 41.

[0086] Of course, the structure of the non-driving section 413 is not limited to the above-mentioned smooth state and thread. Other technical solutions that can achieve the goal of making the compression block 31 located in the non-driving section 413 no longer driven by the screw 41 are within the protection scope of the present invention and will not be elaborated here.

[0087] Furthermore, the tissue closing device 100 further includes at least one linkage member 7 that links the compression block 31 and the firing block 32 to drive the compression block 31 and the firing block 32 from the second state to the first state.

[0088] In the present embodiment, the above-mentioned driving the compression block 31 and the firing block 32 from the second state to the first state specifically refers to that, in the process of the screw rod 41 rotating in the opposite direction, driving the firing assembly 3 to move from the firing position to the initial position, and driving the firing block 32 to move in the proximal direction, the linkage member 7 drives the compression block 31 to move from the non-driving section 413 to the driving section 412, so that the compression block 31 and the firing block 32 enter the first state and move to the initial position synchronously.

[0089] Of course, in the embodiment in which only at least part of the structure of the compression block 31 cooperates with the driving section 412 when the firing assembly 3 is in the initial position, the above-mentioned driving of the compression block 31 and the firing block 32 from the second state to the first state also includes that the screw rod 41 rotates forward to drive the firing assembly 3 from the initial position to the firing position, and in the process of driving the compression block 31 to move in the distal direction, the linkage member 7 drives the firing block 32 to move to the driving section 412, so that the compression block 31 and the firing block 32 enter the first state and move synchronously in the distal direction.

[0090] It is understandable that this is not limiting and adaptive changes can be made according to specific circumstances.

[0091] Specifically, the proximal end of the linkage member 7 is connected to the firing block 32 , and the distal end is connected to the compression block 31 , so as to realize the linkage between the compression block 31 and the firing block 32 .

[0092] In this embodiment, the two ends of the linkage member 7 are movably connected to the compression block 31 and the firing block 32 respectively. Of course, it is not limited to this. The two ends of the linkage member 7 can also be fixedly connected to the compression block 31 and the firing block 32. At this time, the linkage member 7 can be set to a flexible body shape such as a line, so that the linkage member 7 can link the compression block 31 and the firing block 32, and at the same time, the firing block 32 and the compression block 31 can also move relative to each other; or, the distal end of the linkage member 7 is fixedly connected to the compression block 31, and the proximal end is movably connected to the firing block 32. It can be understood that it is not limited to this, as long as the compression block 31 and the firing block 32 can be linked, and at the same time, the firing block 32 and the compression block 31 can move relative to each other.

[0093] For details, please refer to Figure 3-Figure 4 In the illustrated embodiment, the linkage member 7 comprises a connecting rod 71 extending from the proximal end to the distal end, and anti-slip members 72 provided at both ends of the connecting rod 71. The firing assembly 3 is provided with a through groove 321 for the connecting rod 71 to pass through. After the linkage member 7 is connected to the compression block 31 and the firing block 32, the compression block 31 and the firing block 32 are sleeved on the connecting rod 71, and the compression block 31 and the firing block 32 are located between the two anti-slip members 72. On the one hand, the firing block 32 and the compression block 31 can move relative to each other along the connecting rod 71, and on the other hand, the anti-slip member 72 can prevent the firing block 33 and the compression block 31 from being separated from the connecting rod 71, so that the linkage member 7 can drive the compression block 31 and the firing block 32 to switch from the second state to the first state.

[0094] The anti-dropping member 72 includes a first anti-dropping member 721 matched with the compression block 31 and a second anti-dropping member (not shown) matched with the firing block 32 .

[0095] In this embodiment, the first anti-slip member 721 is a stopper fixedly connected to the distal end of the connecting rod 71, and the distal end of the through slot 321 on the compression block 31 is adapted to the stopper, so that the compression block 31 can be restricted from being separated from the connecting rod 71 from the distal end of the connecting rod 71. At the same time, the distal end surface of the first anti-slip member 721 is flush with the distal end surface of the compression block 31, reducing the interference between the first anti-slip member 721 and the tubular tissue. Of course, it is not limited to this, the first anti-slip member 721 can also be a limit pin, or can be integrally formed with the connecting rod 71, as long as it can prevent the compression block 31 from being separated from the connecting rod 71, and no special limitation is made here.

[0096] The second anti-detachment member can be a limit pin or a similar structure detachably connected to the connecting rod 71. At this time, the proximal end of the connecting rod 71 is provided with a pin hole 711 that cooperates with the limit pin, which facilitates the assembly between the connecting rod 71 and the compression block 31 and the firing block 32, and can prevent the firing block 32 from detaching from the connecting rod 71 from the proximal end of the connecting rod 71, and has a simple structure.

[0097] When the firing assembly 3 is located at the firing position and the tubular tissue in the molding cavity 20 forms a centrally tightened cluster purse, the screw 41 is rotated in the reverse direction, and the screw 41 drives the firing block 32 to move in the proximal direction. The firing block 32 gradually moves away from the compression block 31. After the firing block 32 moves to the position where the second anti-slip component is located, the firing block 32 can no longer move in the proximal direction relative to the connecting rod 71. At this time, the screw 41 is continued to be rotated in the reverse direction. During the process of the firing block 32 moving in the proximal direction, the compression block 31 is pulled, so that the compression block 31 moves from the non-driving section 413 to the driving section 412, and moves in the proximal direction synchronously with the firing block 32, until the firing assembly 3 is located at the initial position, and the screw 41 stops rotating, and the first clamp seat 1 and the second clamp seat 2 are opened.

[0098] It is understandable that, in the initial position, the compression block 31 may be adapted to the driving segment 412, and the firing block 32 may not be adapted to the driving segment 412. When the compression block 31 moves toward the distal end, the linkage member 7 drives the firing block 32 to adapt to the driving segment 412, and then move toward the distal end synchronously.

[0099] In this embodiment, the number of the linkage members 7 is two, and the two linkage members 7 are symmetrically arranged to enhance the linkage stability between the firing block 32 and the compression block 31 .

[0100] Furthermore, the screw rod 41 also includes a connecting section 411 located at the proximal end, and the connecting section 411 protrudes from the proximal end of the connecting portion 12 to the proximal direction. After the tissue closure device 100 is connected to the instrument body, the connecting section 411 is conveniently associated with the firing handle to achieve linkage between the firing handle and the screw rod 41.

[0101] It is understandable that after the firing handle is manipulated, the screw rod 41 can be driven to rotate electrically or manually.

[0102] The first clamping seat 1 is provided with a receiving groove 14 for receiving the screw rod 41 , and the receiving groove 14 is communicated with the first sliding groove 13 , so that a part of the structure of the firing assembly 3 can pass through the first sliding groove 13 and be threadedly connected with the screw rod 41 .

[0103] Specifically, the receiving groove 14 is formed by being recessed from a side of the first clamping seat 1 away from the second clamping seat 2 toward the direction where the second clamping seat 2 is located, so as to facilitate the assembly between the screw rod 41 and the first clamping seat 1 .

[0104] It can be understood that the distal end of the receiving groove 14 is closed or stepped. After the compression block 31 moves to the firing position, at least part of the structure of the compression portion abuts against the distal end of the receiving groove 14, limiting the compression portion from continuing to move in the distal direction, that is, the distal end of the receiving groove 14 can serve as the above-mentioned first stop portion 19. Of course, this is not limited to this.

[0105] Furthermore, the screw rod 41 also includes a limit block 414 connected to the distal end of the non-driving section 413, and the first clamp seat 1 is provided with a limit groove 15 that cooperates with the limit block 414, and the limit groove 15 is communicated with the receiving groove 14. After the screw rod 41 is assembled on the first clamp seat 1, the limit block 414 is received in the limit groove 15.

[0106] Furthermore, a locking piece 23 is provided on one of the distal ends of the first clamp seat 1 and the second clamp seat 2, and a matching portion 17 matching with the locking piece 23 is provided on the other. When the second clamp seat 2 is in the closed position, the locking piece 23 extends into the matching portion 17, which can further prevent the second clamp seat 2 from opening under the accumulation of tubular tissue and prevent the tubular tissue from overflowing.

[0107] Specifically, the locking member 23 is disposed at the distal end of the second clamping seat 2, and the matching portion 17 is adapted to be disposed at the distal end of the first clamping seat 1. Moreover, the contact surfaces of the locking member 23 and the matching portion 17 guide each other, for example, they may be guiding inclined surfaces.

[0108] Ginseng Figure 19-20 In the preferred embodiment shown, the matching portion 17' is configured to be open toward the proximal direction, and the locking member 23' matches the matching portion 17' from the proximal end of the matching portion 17'. It can be understood that during the movement of the compression block 31 toward the distal end, the second clamp seat 2 will naturally tend to move toward the distal end, and the locking member 23' will enter the matching portion 17'. When the compression block 31 moves toward the proximal end after firing, under the action of the driving force, the locking member 23' will slightly move toward the proximal end and naturally disengage from the matching portion 17'.

[0109] In this embodiment, the locking members 23 and 23 ′ are hooks, and the matching portions 17 and 17 ′ are slots matched with the hooks, but the present invention is not limited thereto.

[0110] For details, please refer to Figure 3-Figure 4 In the illustrated embodiment, the firing block 32 includes a staple pusher 322 connected to the driving mechanism 4, a cutter 323 connected to the staple pusher 322 and protruding toward the distal end, and at least one staple 324 disposed at the distal end of the staple pusher 322. The guide groove 33 includes a staple guide groove 331 for allowing the staple 324 and a portion of the staple pusher 322 to pass through, and a cutter guide groove 332 for allowing at least a portion of the cutter 323 to pass through. As in the prior art, the staple 324 is provided with a staple foot and a connecting portion connecting the staple foot.

[0111] Furthermore, the distal end surface of the cutter 323 is located proximal to the distal end surface of the staple foot, so as to achieve tissue anastomosis first and then cutting.

[0112] After the compression block 31 moves to the firing position, the firing block 32 continues to move toward the forming cavity 20, so that the anastomosis staple 324 passes through the guide staple groove 331 and enters the forming cavity 20, completing the anastomosis of the tubular tissue in the forming cavity 4. At the same time, at least part of the structure of the cutter 323 passes through the guide knife groove 332 and enters the forming cavity 20, completing the cutting of the tubular tissue in the forming cavity 4, forming a centrally tightened bundle purse.

[0113] The distal end of the first clamping seat 1 is provided with an anvil 18 protruding toward the second clamping seat 2, and the proximal surface of the anvil 18 is provided with a nail anvil 181 cooperating with the staple 324 to form the staple 324, and a knife anvil 182 cooperating with the cutter 323 to cut the tubular tissue.

[0114] Specifically, the knife anvil 182 is a knife groove formed by being recessed from the proximal end surface of the anvil block 18 toward the distal end. The above-mentioned matching portion 17 is arranged on the anvil block 18 .

[0115] Furthermore, the number of the staples 324 is two, and the two staples 324 are symmetrically arranged on the left and right sides of the cutter 323, so that two centrally tightened bundled purses can be formed at one time, shortening the operation time.

[0116] Specifically, the staple pusher 322 includes a staple pusher body 325, a staple placement portion 326 connected to the distal end of the staple pusher body 325, and the staple placement portion 326 is provided with a first stopper 3261 for stopping the staples 324 in the vertical direction and a second stopper 3262 for stopping the staples 324 in the left-right direction. Under the joint action of the first stopper 3261 and the second stopper 3262, the staples 324 are kept moving toward the distal end without deflection during the firing process, thereby ensuring the staple forming effect.

[0117] The first limiting member 3261 is a limiting strip connected to the distal end of the staple placement portion 326 and extending in the vertical direction. The staple 324 is provided with a groove 3241 that matches the limiting strip. After the staple 324 is placed on the staple placement portion 326, the limiting strip is received in the groove 3241 to support and limit the staple 324 in the vertical direction. It can be understood that the shape of the first limiting member 3261 only needs to be compatible with the shape of the proximal end of the staple 324, and may also be other shapes.

[0118] The second limiting member 3262 is two convex strips respectively arranged on the left and right sides of the nail placing portion 326. The two convex strips protrude from the nail placing portion 326 to the distal end. After the staple 324 is set on the staple placing portion 326, the two convex strips support and limit the staple 324 from the left and right sides of the staple 324 respectively.

[0119] In one embodiment, when the firing assembly 3 is in the initial position, the proximal end of the staple 324 is supported on the staple placement portion 326, and the distal end of the staple 324 is located in the guide staple groove 331, that is, the guide staple groove 331 can support and limit the distal end of the staple 324, and the guide staple groove 331, the first limiting member 3261, and the second limiting member 3262 cooperate to keep the staple 324 on the staple placement portion 326. Of course, it is not limited thereto, and when a certain distance is set between the compression block 31 and the firing block 32, the distal end of the staple 324 may not be placed in the guide staple groove 331.

[0120] For further information, see Figure 1-Figure 2As shown, the inner wall surface of the forming cavity 20 is wavy along the longitudinal direction of the tissue closure device 100, so that the tubular tissue gathered in the forming cavity 20 is wavy, so that the stapler 324 can intermittently penetrate the tubular tissue, and the formed purse is more reliable, and a centrally tightened clustered purse can be formed. When the circular tubular stapler is used later, the tubular tissue is not easy to slip off under the action of external force, thereby reducing the risk of "cat ears" and fistulas after surgery. At the same time, the operation is simple, the use is convenient, and the surgical cost is reduced.

[0121] In a specific embodiment, at least one group of protrusions 8 protruding toward the molding cavity 20 are provided on the two molding clamping surfaces, and each of the protrusion groups 8 includes at least two protrusions 81 respectively provided on the two molding clamping surfaces. It can be understood that the molding clamping surfaces and the protrusions 81 together form the above-mentioned wavy inner wall surface. Of course, it is not limited to this.

[0122] Preferably, the protrusions 81 on the two forming clamping surfaces in each protrusion group 8 are arranged in a staggered manner in the longitudinal direction, so that the tubular tissue in the forming cavity 20 forms a more regular wave shape, and the staples 324 can evenly and intermittently penetrate the tubular tissue, forming a purse that is more reliable and less likely to slip.

[0123] Each of the protrusions 81 is provided with a needle groove 811 penetrating the protrusion 81 from the proximal end to the distal end. When the firing block 32 moves toward the distal end, the staples 324 pass through the needle groove 811 to intermittently penetrate the tubular tissue.

[0124] Specifically, each of the protrusions 81 includes a first wall 812, a second wall 813, and a connecting wall 814 connecting the first wall 812 and the second wall 813 that are relatively and spaced apart. The connecting wall 814 is connected to the first clamp seat 1 or the second clamp seat 2 corresponding to the protrusion 81. The first wall 812, the second wall 813 and the connecting wall 814 together form the needle groove 811 for the anastomosis staple 324 to pass through.

[0125] The protrusion groups 8 correspond one-to-one to the staples 324. It can be understood that in the embodiment with two staples 324, the number of the protrusion groups 8 is also two, and the two groups of protrusion groups 8 are arranged at intervals along the lateral direction of the tissue closure device 100 to cooperate with the two staples 324 respectively.

[0126] The use process of the medical device in the present invention is:

[0127] like Figure 5-Figure 7 As shown, the firing assembly 3 is in the initial position, the second clamp seat 2 is opened, and the tubular tissue is placed between the first clamp seat 1 and the second clamp seat 2;

[0128] like Figure 8-Figure 9 As shown, the screw rod 41 is driven to rotate forwardly by the firing handle, driving the compression block 31 to move a certain distance in the distal direction, and closing the second clamp seat 2 to clamp the tubular tissue. At the same time, the first clamp seat 1 and the second clamp seat 2 are relatively fixed by the cooperation of the locking members 23, 23' and the matching parts 17, 17' to prevent the tubular tissue from overflowing;

[0129] like Figure 10-12 As shown, the screw rod 41 continues to rotate forward, driving the compression block 31 and the firing block 32 to move in the distal direction, and the compression block 31 gradually gathers the tubular tissue in the compression chamber 10 into the forming chamber 20; after the compression block 31 moves to the first firing position, the tubular tissue in the compression chamber 10 is completely gathered into the forming chamber 20, and forms a wave shape under the action of the protrusion group 8;

[0130] like Figure 13-Figure 15 As shown, after the compression block 31 is located at the firing position, the screw rod 41 continues to rotate forward, and the compression block 21 is no longer driven by the screw rod 41. At the same time, the firing block 32 continues to move toward the forming cavity 20, gradually approaches and passes through the yielding portion, so that the staples 324 enter the forming cavity 20 and pass through the wavy tubular tissue to anastomose the tubular tissue in the forming cavity 20. The cutter 72 enters the forming cavity 20 to cut the tubular tissue in the forming cavity 20, forming a centrally tightened bundle purse;

[0131] like Figure 16-18 As shown, after the cluster purse is formed, the screw 41 rotates in the opposite direction, driving the firing block 32 to move in the proximal direction and gradually away from the compression block 31, and finally driving the compression block 31 to move from the non-driving section 413 to the driving section 412, and move in the proximal direction synchronously with the firing block 32, until the firing assembly 3 is located in the initial position and the second clamp seat 2 is opened.

[0132] Compared with the prior art, the tissue closure device 100 of the present invention, on the one hand, completely gathers the tubular tissue in the compression chamber 10 into the molding chamber 20 through the compression block 31 in advance, so that the volume of the formed purse is smaller, and finally a bundled purse with a tightened center is formed, which is more convenient to be accommodated in the tubular device later; on the other hand, the height of the molding chamber 20 is greater than the height of the compression chamber 10, and the accommodating space of the molding chamber 20 is increased to better accommodate the tubular tissue, so as to avoid the tubular tissue being unable to be completely accommodated in the molding chamber 20 due to insufficient accommodating space of the molding chamber 20, and even after the compression block continues to compress the tissue, the second clamp seat 2 is opened due to the accumulation of the tubular tissue in the molding chamber 20, so that the molding chamber 20 is opened, affecting the anastomosis effect of the tubular tissue.

[0133] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0134] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tissue closing device, comprising a first clamp seat, a second clamp seat that can be opened and closed relative to the first clamp seat, a firing assembly, and a driving mechanism for driving the firing assembly, wherein when the second clamp seat is closed, the second clamp seat cooperates with the first clamp seat to form a compression chamber and a forming chamber that are interconnected, the forming chamber is located at the distal end of the compression chamber, the firing assembly has an initial position located at the proximal end of the compression chamber and a firing position located at the distal end of the compression chamber, and is characterized in that: The height of the forming cavity is greater than the height of the compression cavity; the firing assembly includes a compression block and a firing block which are separately arranged, the firing block is located at the proximal end of the compression block, and the compression block is provided with a compression portion and a yield portion which penetrates the compression portion. After the compression block moves to the firing position, when the firing block continues to move toward the forming cavity, at least part of the structure of the firing block passes through the yield portion and enters the forming cavity.

2. The tissue closure device according to claim 1, characterized in that: The first clamp seat and the second clamp seat are both provided with clamping surfaces, which include a compression clamping surface corresponding to the compression cavity and a molding clamping surface corresponding to the molding cavity. The compression clamping surface is closer to the center line of the tissue closure device than the molding clamping surface.

3. The tissue closure device according to claim 2, characterized in that: The molding clamping surface is provided with a plurality of spaced protrusions protruding toward the molding cavity, and the protrusions on the two molding clamping surfaces are staggered along the longitudinal direction of the tissue closing device.

4. The tissue closure device according to claim 1, wherein: A stop portion is provided on at least one of the first clamp seat and the second clamp seat, and when the compression block is located at the firing position, the compression portion stops at the stop portion.

5. The tissue closure device according to claim 1, wherein: The first clamp seat is provided with a first slide groove extending from the proximal end to the distal end of the first clamp seat, and the second clamp seat is provided with a second slide groove extending from the proximal end to the distal end of the second clamp seat, and the compression block is slidably matched with the first slide groove and the second slide groove; the compression part is provided with a first pressing plate acting on the side of the first clamp seat away from the second clamp seat, and a second pressing plate acting on the side of the second clamp seat away from the first clamp seat; the first pressing plate, the second pressing plate and the compression part drive the second clamp seat to close.

6. The tissue closure device according to claim 1, wherein: The driving mechanism includes a driving rod which is arranged on the first clamping seat and extends from the proximal end to the distal end, and the driving rod includes a driving section; the compression block and the firing block have a first state of synchronous movement and a second state of asynchronous movement; in the first state, the compression block and the firing block cooperate with the driving section at the same time, and in the second state, one of the compression block and the firing block cooperates with the driving section.

7. The tissue closure device according to claim 6, characterized in that: The drive rod further comprises a non-drive section located at a distal end of the drive section, and after the compression block is located at the firing position, the compression block cooperates with at least a portion of the non-drive section.

8. The tissue closing device according to claim 6 or 7, characterized in that: The driving rod is a screw rod, a driving section of the screw rod is provided with threads, and the firing assembly is threadedly connected to the screw rod.

9. The tissue closing device according to claim 6 or 7, characterized in that: The firing assembly further comprises at least one linkage member; the proximal end of the linkage member is connected to the firing block, and the distal end is connected to the compression block; the linkage member drives the compression block and the firing block from the second state to the first state.

10. The tissue closure device according to claim 9, characterized in that: The linkage member is movably connected to the firing assembly, and the linkage member includes a connecting rod extending from the proximal end to the distal end, and anti-dropping members arranged at both ends of the connecting rod. The firing assembly is provided with a through groove for the connecting rod to pass through.

11. The tissue closure device according to claim 1, wherein: The firing block includes a nail pushing piece, a cutter connected to the nail pushing piece and protruding toward the distal end, and at least one staple arranged at the distal end of the nail pushing piece; the yielding portion includes a nail guide groove for the staple and part of the nail pushing piece to pass through, and a knife guide groove for the cutter to pass through.

12. The tissue closure device according to claim 1, wherein: A locking piece is disposed on one of the distal ends of the first clamp seat and the second clamp seat, and a matching portion matching with the locking piece is disposed on the other one; the locking piece matches with the matching portion from the proximal end of the matching portion.

13. A medical device, comprising a device body, a tissue closure device detachably connected to the distal end of the device body, and a firing device connected to the device body to act on the tissue closure device, characterized in that: The tissue closing device is the tissue closing device according to any one of claims 1-12.

Images