CN209347123U - Tissue Closure Devices and Medical Devices - Google Patents

Abstract

The utility model provides a tissue closing device and a medical device, belonging to the field of medical devices, comprising a first clip seat, a second clip seat, a firing assembly, and a driving mechanism. When the second clip seat is closed, the second clip seat and the first clip seat The seat cooperates to form a compression chamber and a molding chamber that communicate with each other. The molding chamber is located at the far end of the compression chamber. The firing assembly includes a separate compression block and a firing block. part and the relief part pierced through the compression part, after the compression block is in the firing position, the firing block continues to move toward the molding cavity, so that at least part of the structure of the firing block passes through the relief part and enters the molding cavity; The block completely gathers the tubular tissue in the compression cavity into the forming cavity, and then anastomoses and cuts the tubular tissue in the forming cavity through the firing block, so that the volume of the formed purse is small, and a clustered purse that is tightened in the center can be formed .

Description

Tissue Closure Devices and Medical Devices

technical field

The utility model relates to the field of medical equipment, in particular to a tissue closure device and medical equipment.

Background technique

In the existing digestive tract anastomosis operation, the tubular tissue is generally cut and anastomosed at multiple angles with a linear or arc-shaped stapler, and then the cut-off tissue is butted and anastomosed with a round-shaped stapler.

However, the linear or arc-shaped staplers in the prior art cannot form a clustered purse that is tightened in the center, and the anastomosis formed by the existing linear stapler after firing is linear, which cannot make the purse close. It is small enough that it is difficult to completely retract the purse into the lumen of the nail barrel of the circular stapler.

Therefore, it is necessary to provide a new tissue closure device and medical device to solve the above problems.

Utility model content

The purpose of the utility model is to provide a tissue closure device and a medical instrument.

In order to achieve the purpose of the above utility model, the utility model adopts the following technical solution: a tissue closure device, including a first clip seat, a second clip seat that can be opened and closed relative to the first clip seat, a firing assembly, and a driving assembly that drives the The driving mechanism of the firing assembly, when the second clip seat is closed, the second clip seat cooperates with the first clip seat to form a compression cavity and a forming cavity communicating with each other, and the forming cavity is located at the far end of the compression cavity end, the firing assembly has an initial position at the proximal end of the compression chamber and a firing position at the far end of the compression chamber, the firing assembly includes a separate compression block and a firing block, the firing block It is located at the proximal end of the compression block, and the compression block is provided with a compression part and a relief part pierced through the compression part. After the compression block moves to the firing position, the firing block continues to move toward the When the molding cavity moves, at least part of the structure of the firing block enters the molding cavity after passing through the relief portion.

As a further improved technical solution of the utility model, the first clamping seat is provided with a first chute extending from the proximal end of the first clamping seat to the direction of the distal end, and the second clamping seat is provided with a self- The proximal end of the second clip seat extends toward the distal end of a second sliding groove, and the compression block is slidingly engaged with the first sliding groove and the second sliding groove.

As a further improved technical solution of the present invention, at least one of the first clip seat and the second clip seat is provided with a stopper, and when the compression block is at the firing position, the compression part stops at the stopper.

As a further improved technical solution of the present invention, the first chute runs through the first clamping seat along the height direction of the first clamping seat, and the second chute runs through the first clamping seat along the height direction of the second clamping seat Through the second clamping seat; the compression part is provided with a first pressure piece acting on the side of the first clamping seat away from the second clamping seat, acting on the second clamping seat away from the The second pressing piece on one side of the first clamping seat; the first pressing piece, the second pressing piece and the compression part drive the second clamping seat to close.

As a further improved technical solution of the present invention, the stop part includes a first stop part provided on the first clamp seat, and a second stop part provided on the second clamp seat. When the compression block is at the firing position, the first pressing piece is at the first stop portion, and the second pressing piece is at the second stop portion.

As a further improved technical solution of the utility model, the driving mechanism includes a driving rod arranged on the first clip seat and extending from the proximal end to the distal end, the driving rod includes a driving section; the compression block and The firing block has 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 In the second state, one of the compression block and the firing block cooperates with the driving section.

As a further improved technical solution of the present invention, the driving rod further includes a non-driving section located at the distal end of the driving section. After the compression block is at the firing position, the compression block and at least part of the non-driving section segment match.

As a further improved technical solution of the utility model, 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 with the screw rod.

As a further improved technical solution of the utility model, the firing assembly further includes at least one linkage; the proximal end of the linkage is connected to the firing block, and the far end is connected to the compression block; the linkage drives the compression A block enters a first state from the second state with the firing block.

As a further improved technical solution of the present utility model, the linkage is movably connected with the firing assembly, and the linkage includes a connecting rod extending from the proximal end to the distal The firing assembly is provided with a through slot for the connecting rod to pass through.

As a further improved technical solution of the present invention, the screw rod further includes a limiting block at the far end, and the first clamping seat is provided with a limiting groove matching the limiting block.

As a further improved technical solution of the utility model, the firing block includes a nail pushing piece, a cutting knife connected to the nail pushing piece and protruding in the direction of the distal end, at least one of the distal ends of the nail pushing piece Staples; the guide groove includes a nail guide groove through which the staples and part of the pusher pieces pass, and a knife guide groove through which the cutting knife passes.

As a further improved technical solution of the present invention, the nail pusher includes a nail setting part, and the nail setting part is provided with a first stopper for limiting the staple in the vertical direction and a first stopper for moving the staple in the left and right directions. The second limiting member for limiting the staples.

As a further improved technical solution of the present invention, the number of the staples is two, and the two staples are respectively located on both sides of the cutter.

As a further improved technical solution of the present invention, one of the distal ends of the first clip seat and the second clip seat is provided with a locking piece, and the other is provided with a locking piece that matches the locking piece. the coordination department.

In order to achieve the purpose of the above utility model, the utility model also provides a medical device, comprising a device body, the above-mentioned tissue closure device detachably connected to the distal end of the device body, connected to the device body to act on A firing handle of the tissue closure device.

The beneficial effects of the utility model are: the tissue closing device in the utility model completely gathers the tubular tissue in the compression cavity into the forming cavity through the compression block in advance, and then closes the tubular tissue in the forming cavity through the firing block. Anastomotic cutting is performed to reduce the volume of the formed purse, so that a centrally tightened cluster purse can be finally formed, which is more convenient to be accommodated into tubular instruments later.

Description of drawings

Fig. 1 is a schematic structural view of the tissue closure device in the present invention.

Fig. 2 is an exploded view of the first clip seat and the second clip seat in the tissue closure device shown in Fig. 1 .

Fig. 3 is a structural schematic view of the tissue closure device shown in Fig. 1 after removing the first clip seat and the second clip seat.

FIG. 4 is an exploded view of FIG. 3 .

Fig. 5 is a schematic structural view of the compression block in the tissue closure device shown in Fig. 1 when it is at an initial position.

Fig. 6 is a sectional view taken along line A-A in Fig. 5 .

Fig. 7 is a cross-sectional view taken along line B-B in Fig. 5 .

Fig. 8 is a structural schematic view of the compression block in the tissue closure device shown in Fig. 1 during the process of moving from the initial position to the distal direction.

Fig. 9 is a sectional view taken along line C-C in Fig. 8 .

Fig. 10 is a schematic structural view of the compression block in the tissue closure device shown in Fig. 1 when it is at the first fired position.

Fig. 11 is a cross-sectional view taken along line D-D in Fig. 10 .

Fig. 12 is a cross-sectional view taken along line E-E in Fig. 10 .

Fig. 13 is a structural schematic diagram of the firing assembly in the tissue closure device shown in Fig. 1 after it is in the firing position.

Fig. 14 is a cross-sectional view taken along line F-F in Fig. 13 .

Fig. 15 is a cross-sectional view taken along line G-G in Fig. 13 .

Fig. 16 is a structural schematic diagram of the compression block in the tissue closure device shown in Fig. 1 during the process of switching from the first firing position to the initial position.

Fig. 17 is a sectional view taken along the line H-H in Fig. 16 .

Fig. 18 is a sectional view taken along line I-I in Fig. 16 .

Fig. 19 is a schematic structural view of a tissue closure device in another embodiment of the present invention.

Fig. 20 is a cross-sectional view along J-J direction in Fig. 19 .

Detailed ways

The utility model will be described in detail below in conjunction with various implementations shown in the accompanying drawings. Please refer to FIG. 1 to FIG. 20 , which are preferred implementations of the utility model. However, it should be noted that these embodiments are not limitations of the present utility model, and the functions, methods, or structural equivalent transformations or substitutions made by those skilled in the art according to these embodiments all belong to the protection scope of the present utility model. Inside.

The words expressing position and direction described in this utility model all take the equipment operator as a reference, the end close to the equipment operator is the proximal end, and the end far away from the equipment operator is the distal end; the longitudinal/axis in the present invention The direction 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, to connect It can be a direct connection or an indirect connection through an intermediary, it can be a fixed connection or a movable connection or a detachable connection or an integrated connection. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

Referring to FIGS. 1 to 20 , the present invention provides a tissue closure device 100 and a medical device with the tissue closure device 100 . The medical device can be used in anastomosis of the digestive tract.

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

The structure of the instrument body can follow the existing instrument body structure of the linear stapler, or can be designed separately. It can be understood that the structure of the instrument body can be used as long as it can cooperate with the tissue closure device 100 in the utility model. For example, the tissue closure device 100 can be driven to anastomose and/or cut the tubular tissue, which will not be repeated here.

Generally, the tissue closure device 100 is disposed at the distal end of the instrument body, and the tissue closure device 100 will be described in detail below.

The tissue closure device 100 includes a first clip seat 1, a second clip seat 2 that can be opened and closed relative to the first clip seat 1, a firing assembly 3 acting on tubular tissue, and a driving mechanism that drives the firing assembly 3 4.

Please refer to FIGS. 1-2 , the first holder 1 includes a first holder body 11 and a connecting portion 12 connected to the proximal end of the first holder body 11 , and the connecting portion 12 is used for Connected to the instrument body to attach the tissue closure device 100 to the instrument body.

While the connection part 12 is connected to the instrument body, the components that need to be controlled in the tissue closure device 100 (for example, the driving mechanism 4) are associated with the firing handle, so that the firing handle can directly Or act indirectly on the tissue closure device 100 to drive the tissue closure device 100 to anastomose and/or cut the tubular tissue.

The proximal end of the second clip seat 2 is rotatably connected to the first clip seat 1, and when the second clip seat 2 is opened, it is convenient to bring the tubular tissue to be anastomoticly cut into the tissue closure device 100; After the second clamping seat 2 is closed, the tubular tissue is located in the receiving cavity formed by the second clamping seat 2 and the first clamping seat 1 , which is convenient for subsequent anastomotic cutting.

Specifically, the proximal end of the second clip seat 2 is rotatably connected to the distal end of the connecting portion 12 .

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 forming cavity 20 communicating with each other, and the forming cavity 20 is located in the compression cavity 10 the far end. That is, the above-mentioned accommodation cavity includes the compression cavity 10 and the molding cavity 20 .

The firing assembly 3 has an initial position at the proximal end of the compression chamber 10 and a firing position at the distal end of the compression chamber 10 . The driving mechanism 4 is used to drive the firing assembly 3 to move along the longitudinal direction of the tissue closure device 10, and to move between the initial position and the firing position.

When the firing assembly 3 is at the initial position, the second clip seat 2 is opened relative to the first clip seat 1 to facilitate the inclusion of tubular tissue.

Further, the firing assembly 3 includes a separate compression block 31 and a firing block 32, 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 part and a piercing give way to the compression section.

Specifically, the firing block 32 is located at the proximal end of the compression block 31, it can be understood that the firing block 32 is close to the compression block 31, or there is a set between the firing block 32 and the compression block 31 Appropriate distance for better staple closure.

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 cavity 10 into the forming cavity 20, and then, the The firing block 32 continues to move toward the forming cavity 20, and at least part of the structure of the firing block 32 enters the forming cavity 20 through the relief portion, and anastomoses the tubular tissue in the forming cavity 20 Cutting to form a small cluster purse with a tightened center. When the circular tubular stapler is used later, the tubular tissue is not easy to slip off under the action of external force, and the cluster purse can be completely accommodated in the nail barrel of the circular tubular stapler. The cavity is completely resected to reduce the risk of postoperative "cat ears" and fistula.

In this embodiment, the relief part is a guide groove 33 pierced on the compression block 31 from the proximal end to the distal end, so that at least part of the structure of the firing block 32 can pass through the compression block 31 , performing anastomotic cutting on the tubular tissue in the forming cavity 20 . Of course, it is not limited to this.

It can be understood that the firing assembly 3 is at the initial position, which means that both the compression block 31 and the firing block 32 are at the initial position; when the firing assembly 3 is at the firing position, the compression The block 31 completely folds the tubular tissue in the compression cavity 10 into the forming cavity 20 , and at the same time, the firing block 32 completes anastomotic cutting of the tubular tissue in the forming cavity 20 .

Further, the first clip seat 1 is provided with a first sliding groove 13 extending from the proximal end of the first clip seat 1 to the distal direction, and the compression block 31 is slidably connected to the first sliding groove 13 , the driving mechanism 4 drives the compression block 31 to move along the first chute 13 to move the compression block 5 between an initial position and a firing position.

At the same time, the second clip seat 2 is provided with a second chute 21 extending from the proximal end of the second clip seat 2 to the distal direction. After the second clip seat 2 is closed, the compression block 31 Can move along the second chute 21, during the moving process of the compression block 31, the first chute 13 and the second chute 21 are respectively from the opposite ends of the compression block 31 to the The compression block 31 is limited to enhance the stability of the movement of the compression block 5 .

Further, the second sliding groove 21 runs through the second clamping seat 2 along the height direction of the second clamping seat 2 , and the first sliding groove 13 runs through the second clamping seat 1 from the height direction of the first clamping seat 1 . Describe the first holder 1.

The tissue closure device 100 also includes a first pressing piece 5 connected to the end of the compression part corresponding to the first clip seat 1, connected to the compression part and connected to the second clip seat 2. The second pressing piece 6 at the corresponding end, the first pressing piece 5 acts on the side of the first holder 1 away from the second holder 2, the second pressing piece 6 is located on the second On the side of the clip seat 2 away from the first clip seat 1, during the movement of the compression block 31 from the initial position to the firing position, the first pressing piece 5, the second pressing piece 6 and the The compression parts work together to drive the second clip seat 2 to close, and after the compression block 31 is located at the firing position, it can keep the second clip seat 2 in a closed state, preventing the second clip seat 2 from The opening between the first clip seat 1 is enlarged, resulting in overflow of tubular tissue.

In the present invention, the height direction refers to the direction perpendicular to the axial direction, that is, it can be understood as the direction perpendicular to the first clip seat 1 .

The first pressing piece 5, the compressing portion and the second pressing piece 6 together form an "I"-shaped structure, and the second clamp seat 2 is driven to switch from open to closed through the "I"-shaped structure, which is a common structure in the field. Here, no more details. At the same time, a structure such as a shrapnel can be additionally set to act on the proximal end of the second clamping seat 2, and when the compression block 31 moves to the initial position in the proximal direction, the distal end of the second clamping seat 2 is driven away from the The first clamping seat 1 opens and maintains the second clamping seat 2 in the open state. This technology is also a common technology in the art, and will not be repeated here.

Further, at least one of the first clamping seat 1 and the second clamping seat 2 is provided with a stopper, after the driving mechanism 4 drives the compression block 31 to move to the firing position, the The compression part stops at the stop part, that is, the stop part prevents the compression part from continuing to move in the distal direction, prevents excessive compression of the tubular tissue, and even causes the first clip seat 1 to be in contact with the The opening between the second holders 2 increases.

In a specific embodiment, the first clamping seat 1 and the second clamping seat 2 are provided with the stoppers, which are the first stoppers 19 on the first clamping seat 1 respectively. And the second stop portion 24 on the second clip seat 2, after the compression block 31 is located at the firing position, the first pressing piece 5 is positioned at the first stop portion 19, The second pressing piece 6 stops at the second stop portion 24 to prevent the compression portion from moving further toward the distal end. Of course, it is not limited thereto. It can be understood that the stop part can be provided only on the first clip seat 1 or the second clip seat 2, or the stop part directly matched with the compression part can be provided. As long as it can prevent the compression block 31 from entering the molding cavity 20 .

Specifically, the side of the second holder 2 away from the first holder 1 is concavely provided with a tablet-pressing groove for the movement of the second pressing piece 6, and the distal end of the tablet-pressing groove is stepped, At this time, the second stop portion 24 is the distal end of the tablet-pressing groove, so that the tissue closure device can be smoothly inserted into the surgical device without increasing the pain of the patient without increasing the outer diameter of the tissue closure device. Of course, it is not limited to this.

It can be understood that, the structure of the first stop portion 19 can follow the structure of the second stop portion 24 , of course, it can also be provided in addition, as long as the compression block 31 can be prevented from entering the molding cavity 20 That's it.

Furthermore, in this 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, it is not limited thereto, and the compression block 31 and the firing block 32 can always be in the second state of asynchronous movement, that is, the driving mechanism 4 can be designed to drive the compression block 31 independently first. Switch from the initial position to the firing position, so as to completely fold the tubular tissue in the compression chamber 10 into the forming cavity 20, and then separately drive the firing block 32 to move from the initial position to the forming cavity 20, so as to Anastomotic cutting is performed on the tubular tissue located in the forming cavity 20 to finally form a bundled purse bag with a tightened center. The structure of the driving mechanism 4 can adopt the existing driving structure, as long as it can realize the driving of the compression block 31 and the firing block 32 , it will not be repeated here.

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 to move synchronously with the firing block 32, until After the compression block 31 completely compresses the tubular tissue in the compression cavity 10 into the forming cavity 20 , it drives the firing block 32 to continue moving toward the forming cavity 20 independently. Correspondingly, 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 alone drives the firing block 32 to move in the proximal direction, and then drives The compression block 31 and the firing block 32 move in the proximal direction to the initial position synchronously. It can be understood that the process in which the drive mechanism 4 simultaneously drives the compression block 31 and the firing block 32 is the first state; the process in which the drive mechanism 4 drives the compression block 31 or the firing block 32 independently to the second state.

Of course, it is not limited thereto. During the process of the firing assembly 3 moving from the initial position to the firing position, the compression block 31 can also be separately driven to move in the distal direction, and then the The compression block 31 moves synchronously with the firing block 32, and after the compression block 31 completely compresses the tubular tissue in the compression cavity 10 into the molding cavity 20, the firing block 32 is independently driven to continue to the The molding cavity 20 moves. It can be understood that as long as the tubular tissue in the compression cavity 10 can be completely compressed into the forming cavity 20 by the compression block 31 first, and then the tissue in the forming cavity 20 can be compressed by the firing block 32 Tubular tissue can be anastomotic cut.

The driving mechanism 4 includes a driving rod that passes through the first holder 1 and extends from the proximal end to the distal end, and the firing assembly 3 is connected with the driving rod so as to drive the driving rod through the driving rod. The firing assembly 3 moves along the first chute 13 and the second chute 21 with a simple structure.

Further, 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 cooperate with each other. The firing block 32 can move synchronously; in the second state, one of the compression block 31 and the firing block 32 cooperates with the driving section, and drives the compression block 31 matched with the driving section Or the firing block 32 moves independently, so that relative movement can be generated between the compression block 31 and the firing block 32 .

Please refer to Figures 3-5, in a specific embodiment, the driving rod is a screw rod 41, the driving section 412 of the screw rod 41 is provided with threads, and the firing assembly 3 is threadedly connected to the screw rod 41, When the screw rod 41 rotates, it drives the firing assembly 3 to move along the first chute 13 and the second chute 21 .

Of course, the driving mechanism 4 is not limited to the screw rod 41, and 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 motion are also used in this application. Within the scope of protection of the new type, such as the rack and pinion drive mechanism, etc., no more details are given here.

As is well known, the rotation of the screw 41 is different, which can drive the firing assembly 3 to move in different directions. For the convenience of subsequent description, when the screw 41 rotates in the forward direction, it drives the firing assembly 3 to move in the distal direction. , that is to drive the firing assembly 3 to move from the initial position to the firing position; when the screw 41 rotates in the opposite direction, it drives the firing assembly 3 to move in the proximal direction, that is, drives the firing assembly 3 to move from the firing position to the initial position. Describe in detail.

In this embodiment, the screw 41 further includes a non-driving section 413 located at the distal end of the driving section 412 . When the firing assembly 3 is in 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, and when the screw rod 41 rotates forward, the firing block is driven. The block 32 moves to the firing position synchronously with the compression block 31. After the compression block 31 completely compresses the tubular tissue in the compression cavity 10 into the molding cavity 20, the compression block 31 is separated from the compression block 31. The driving section 412 is matched with at least part of the non-driving section 413. At this time, the firing block 32 is still matched with the driving section 412, and the screw 41 is continuously rotated forward to drive the firing block 32. Continue to move to the forming cavity 20 to achieve anastomotic cutting of the tubular tissue in the forming cavity 20 to form a bundled purse with a tightened center.

It can be understood that when all the compression blocks 31 are matched with the non-driving section 413, no matter whether the screw 41 continues to rotate forward or reverse, the compression block 31 cannot be driven along the tissue closure device. The axial movement of 100 keeps the tubular tissue folded in the forming cavity 20 always in a folded state.

Specifically, please refer to FIGS. 3-4 , in this embodiment, the surface of the non-driving section 413 is in a non-threaded state, such as a smooth surface, so that when the compression block 31 is located in the non-driving section After 413, the screw 41 continues to rotate without driving the compression block 31 to move.

In another embodiment, the surface of the non-driving section 413 can also be provided with threads, as long as the threads do not match the threads on the compression block 31 , for example, the major diameter of the threads is smaller than the threads 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.

Of course, the structure of the non-driving section 413 is not limited to the above-mentioned smooth state and screw thread, and other technical solutions that can achieve the compression block 31 located in the non-driving section 413 are no longer driven by the screw 41. Within the protection scope of the present utility model, details will not be repeated here.

Further, the tissue closure device 100 also includes at least one linkage 7 that links the compression block 31 and the firing block 32 to drive the compression block 31 and the firing block 32 to enter from the second state. first state.

In this embodiment, the aforementioned drive of the compression block 31 and the firing block 32 from the second state to the first state specifically refers to driving the firing assembly 3 to automatically rotate when the screw 41 rotates in the opposite direction. The firing position moves to the initial position, and during the process of driving the firing block 32 to move proximally, the linkage 7 drives the compression block 31 to move from the non-driving section 413 to the driving section 412, so that the The compression block 31 and the firing block 32 enter the first state and move to the initial position synchronously.

Certainly, in the embodiment where 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 block 31 and the firing block 32 Entering the first state from the second state also includes that the screw 41 rotates forward to drive the firing assembly 3 to move from the initial position to the firing position, and during the process of driving the compression block 31 to move toward the distal end , 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 toward the distal end synchronously.

It can be understood that it is not limited thereto, and adaptive changes can be made according to specific situations.

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 .

In this embodiment, both ends of the linkage member 7 are respectively movably connected with the compression block 31 and the firing block 32 . Of course, it is not limited to this, and both ends of the linkage 7 can also be fixedly connected to the compression block 31 and the firing block 32. At this time, the linkage 7 can be set in a flexible body shape such as a line, so that , the linkage 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 relatively; or, the distal end of the linkage 7 is fixedly connected On the compression block 31 , the proximal end is movably connected with the firing block 32 . It can be understood that it is not limited thereto, as long as the compression block 31 and the firing block 32 can be linked and at the same time, relative movement between the firing block 32 and the compression block 31 can be achieved.

Specifically, please refer to the embodiment shown in FIGS. 3-4 , the linkage 7 includes a connecting rod 71 extending from the proximal end to the distal end, and anti-dropping members 72 arranged at both ends of the connecting rod 71 . The firing assembly 3 is provided with a through slot 321 through which the connecting rod 71 passes. After the linkage 7 is connected with the compression block 31 and the firing block 32, the compression block 31 and the firing block 32 The firing block 32 is sheathed on the connecting rod 71, and the compression block 31 and the firing block 32 are located between the two anti-off pieces 72. On the one hand, the firing block 32 and the compression The block 31 can move relatively along the connecting rod 71. On the other hand, the anti-detachment part 72 can prevent the firing block 33 and the compression block 31 from detaching from the connecting rod 71, so that the linkage part 7 can drive the The compression block 31 and the firing block 32 are switched from the second state to the first state.

The anti-off piece 72 includes a first anti-off piece 721 matched with the compression block 31 , and a second anti-off piece (not shown) matched with the firing block 32 .

In this embodiment, the first detachment member 721 is a stop block fixedly connected to the distal end of the connecting rod 71, and the far end of the through groove 321 located on the compression block 31 is in contact with the stop block. Therefore, it is possible to limit the separation of the compression block 31 from the distal end of the connecting rod 71 and the connecting rod 71. The distal end surfaces of 31 are flush with each other, reducing the interference between the first detachment preventing member 721 and the tubular tissue. Of course, it is not limited thereto, the first detachment preventing member 721 can also be a limit pin, or can also be integrally formed with the connecting rod 71 , as long as it can prevent the detachment of the compression block 31 from the connecting rod 71 That is, there is no special limitation here.

The second anti-off piece can be a stop pin or similar structure that is detachably connected to the connecting rod 71. At this time, the proximal end of the connecting rod 71 is provided with a pin that cooperates with the stop pin. The hole 711 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 contacting the connecting rod 71 from the proximal end of the connecting rod 71. Detachment, simple structure.

After the firing assembly 3 is at the firing position, and the tubular tissue in the forming cavity 20 forms a centrally tightened purse, the screw 41 is reversely rotated, and the screw 41 drives the firing block 32 to move proximally. , the firing block 32 is gradually moving away from the compression block 31, and after the firing block 32 moves to the position where the second anti-off piece is located, the firing block 32 can no longer move proximally relative to the connecting rod 71 direction, at this time, continue to rotate the screw 41 in the opposite direction, and the firing block 32 pulls the compression block 31 in the process of moving to the proximal direction, so that the compression block 31 moves from the non-driving section 413 to the The driving section 412 moves in the proximal direction synchronously with the firing block 32 until the firing assembly 3 is located at the initial position, the screw 41 stops rotating, and the first clamping seat 1 and the The second clamp seat 2 is opened.

It can be understood that, at the initial position, the compression block 31 can also be adapted to the driving section 412, the firing block 32 is not adapted to the driving section 412, and the compression block 31 can be adapted to the driving section 412. When the distal end moves, the linkage member 7 drives the firing block 32 to fit with the driving section 412, and then moves to the distal end synchronously.

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

Further, the screw 41 also includes a connecting section 411 at the proximal end, and the connecting section 411 protrudes from the proximal end of the connecting part 12 to the proximal direction, and the tissue closure device 100 and the instrument After the main body is connected, it is convenient for the connecting section 411 to be associated with the firing handle, so as to realize the linkage between the firing handle and the screw rod 41 .

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

The first holder 1 is provided with a receiving groove 14 for receiving the screw rod 41, and the receiving groove 14 communicates with the first sliding groove 13, so that part of the structure of the firing assembly 3 can pass through The first chute 13 is threadedly connected with the screw rod 41 .

Specifically, the accommodating groove 14 is formed by recessing from the side of the first clip seat 1 away from the second clip seat 2 toward the direction where the second clip seat 2 is located, so that the screw rod 41 and the second clip seat 2 are conveniently connected. Describe the assembly between the first clip holders 1.

It can be understood that, the distal end of the receiving groove 14 is closed or stepped, and after the compression block 31 moves to the firing position, at least part of the structure of the compressing portion abuts against the distal end of the receiving groove 14 Hold and limit the compression part to continue to move in the distal direction, that is, the distal end of the receiving groove 14 can be used as the first stop part 19, of course, it is not limited thereto. Further, the screw 41 also includes a limiting block 414 connected to the distal end of the non-driving section 413, and the first clamping seat 1 is provided with a limiting groove 15 matched with the limiting block 414 , the limiting groove 15 communicates with the receiving groove 14 , and the limiting block 414 is accommodated in the limiting groove 15 after the screw rod 41 is assembled on the first holder 1 .

Further, as shown in FIG. 1 and FIG. 7, 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 avoid the shortage of the accommodation space of the molding cavity 20. As a result, the tubular tissue cannot be completely accommodated in the forming cavity 20, and even after continuing to compress the tissue, the second clip seat 2 is opened under the accumulation of tubular tissue in the forming cavity 20, so that the forming cavity 20 The opening will cause the overflow of tubular tissue and affect the effect of anastomosis.

Both the first clamping seat 1 and the second clamping seat 2 are provided with a clamping surface, and the two clamping surfaces together form the receiving cavity for clamping the tubular tissue.

The clamping surfaces include a compression clamping surface corresponding to the compression cavity 10 and a forming clamping surface corresponding to the molding cavity 20 . It can be understood that the above-mentioned height of the forming cavity 20 refers to the distance between the two forming clamping surfaces, and the above-mentioned height of the compression cavity 10 refers to the distance between the two compression clamping surfaces.

Specifically, the first clamp seat 1 has a first clamping surface 16, and the first clamping surface 16 includes a first compression clamping surface 161 corresponding to the compression chamber 10, and a first compression clamping surface 161 corresponding to the molding cavity 20. Corresponding to the first forming clamping surface 162, the first compressing clamping surface 161 is closer to the centerline of the tissue closure device 100 than the first forming clamping surface 162, thereby increasing the The height of the forming cavity 20 located on one side of the first clamping seat 1 increases the accommodation space of the forming cavity 20 ; meanwhile, it provides an installation space for the screw 41 .

The second clamp seat 2 has a second clamping surface 22, and the second clamping surface 22 includes a second compression clamping surface 221 corresponding to the compression cavity 10, a second compression clamping surface 221 corresponding to the molding cavity 20 The second forming clamping surface 222, the second compressing clamping surface 221 is closer to the centerline of the tissue closure device 100 than the second forming clamping surface 222, thereby increasing the forming cavity 20 The height on one side of the second holder 1 further increases the accommodating space of the forming cavity 20, so as to avoid the opening of the forming cavity 20 due to insufficient accommodating space of the forming cavity 20, causing the tubular tissue to overflow .

Further, one of the distal end of the first clamping seat 1 and the distal end of the second clamping seat 2 is provided with a locking member 23, and the other is provided with a matching portion that cooperates with the locking member 23 17. After the second clamping seat 2 is in the closed position, the locking member 23 extends into the matching portion 17, which can further prevent the second clamping seat 2 from opening under the accumulation of tubular tissue and prevent the tubular tissue from overflow.

Specifically, the locking member 23 is disposed at the distal end of the second clip seat 2 , and suitably, the matching portion 17 is disposed at the distal end of the first clip seat 1 . Moreover, the contact surfaces of the locking member 23 and the matching portion 17 are mutually guiding, for example, may be guiding slopes.

Referring to the preferred embodiment shown in FIGS. 19-20 : the matching part 17' is set to open toward the proximal direction, and the locking part 23' is connected to the matching part 17' from the proximal end of the matching part 17'. match. It can be understood that, during the movement of the compression block 31 to the distal end, the second holder 2 will naturally have a tendency to move distally, and the locking member 23' enters the fitting portion 17' , when the compression block 31 is moving toward the proximal end after the firing is completed, under the action of the driving force, the locking member 23 ′ will move slightly toward the proximal end and naturally break away from the matching portion 17 ′.

In this embodiment, the locking pieces 23, 23' are hooks, and the matching parts 17, 17' are slots matching the hooks, but not limited thereto.

Specifically, please refer to the embodiment shown in FIGS. 3-4 , the firing block 32 includes a nail pushing piece 322 connected to the driving mechanism 4 , connected to the pushing nail piece 322 and facing toward the distal end. A protruding cutter 323 and at least one staple 324 disposed on the distal end of the staple push piece 322, the guide groove 33 includes a part structure for the staple 324 and the staple push piece 322 The guide nail slot 331 passing through and the knife guide slot 332 for at least part of the cutting knife 323 to pass through. As in the prior art, the staple 324 is provided with a nail leg and a connecting portion connecting the nail leg.

Further, the distal surface of the cutting knife 323 is located at the proximal end of the distal surface of the nail foot, so as to achieve tissue anastomosis first and then cut.

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 staples 324 enter the forming cavity 20 through the nail guide slots 331, The anastomosis of the tubular tissue in the forming cavity 4 is completed, and at the same time, at least part of the structure of the cutting knife 323 enters the forming cavity 20 through the guide knife groove 332, and the anastomosis of the forming cavity 4 is completed. Cutting of tubular tissue to form a centrally tightened bundle purse.

The distal end of the first clamping seat 1 is provided with an anvil block 18 protruding toward the second clamping seat 2, and the proximal end surface of the anvil block 18 is provided with the anastomotic staple 324 so that the The anvil 181 formed by the staple 324 and the anvil 182 matched with the cutting knife 323 to cut off the tubular tissue.

Specifically, the knife anvil 182 is a knife groove formed by indenting from the proximal end of the anvil block 18 toward the distal end. The above-mentioned matching portion 17 is disposed on the anvil 18 .

Further, 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 bundled purses that are tightened at the center can be formed at one time, shortening the operation time. time.

Specifically, the nail pushing piece 322 includes a nail pushing piece body 325, a nail setting portion 326 connected to the distal end of the nail pushing piece body 325, and the nail setting portion 326 is provided with a stop for positioning in the up and down direction. The first limiting member 3261 of the staple 324 and the second limiting member 3262 are used to limit the staple 324 along the left-right direction. Under the combined action of the first limiting member 3261 and the second limiting member 3262, the staple 324 keeps moving toward the distal end without deflection during the firing process, so as to ensure the staple forming effect.

The first limiting member 3261 is a limiting bar connected to the distal end of the nail setting portion 326 and extending in the vertical direction, and the staple 324 is provided with a groove 3241 matching the limiting bar After the staple 324 is set on the staple part 326, the limiting bar is accommodated in the groove 3241 to support and limit the staple 324 in the vertical direction. It can be understood that, as long as the shape of the first limiting member 3261 is adapted to the shape of the proximal end of the staple 324 , other shapes can also be used.

The second limiting member 3262 is two convex strips arranged on the left and right sides of the nail setting part 326, and the two convex strips protrude from the nail setting part 326 at the far end. After the staple 324 is disposed on the staple part 326 , the two protrusions respectively support and limit the staple 324 from the left and right sides of the staple 324 .

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 setting portion 326, and the distal end of the staple 324 is located in the nail guide groove. 331, that is, the guide nail groove 331 can support and limit the distal end of the staple 324, and the guide nail groove 331, the first limiter 3261, and the second limiter 3262 cooperate to make the anastomosis The nail 324 is held on the nail setting portion 326 . Of course, it is not limited thereto. When a certain distance is set between the compression block 31 and the firing block 32 , the distal ends of the staples 324 may not be placed in the nail guide grooves 331 .

Further, please refer to FIGS. 1-2 , the inner wall of the forming cavity 20 is wavy along the longitudinal direction of the tissue closure device 100, so that the tubular tissue folded in the forming cavity 20 is wavy, Therefore, the staples 324 can penetrate the tubular tissue intermittently, and the formed purse is more reliable, and can form a clustered purse that is tightened in the center. When the circular tubular stapler is subsequently used, the tubular tissue is not easy to slip off under the action of external force, reducing the The risk of "cat's ears" and fistula after operation is avoided. At the same time, the operation is simple, convenient to use, and the operation cost is reduced.

In a specific embodiment, at least one set of bump groups 8 protruding toward the inside of the molding cavity 20 are provided on the two molding clamping surfaces, each of the bump groups 8 includes At least two protrusions 81 on the forming clamping surface, it can be understood that the forming clamping surface and the protrusions 81 jointly form the above-mentioned wave-shaped inner wall surface. Of course, it is not limited to this.

Preferably, the protrusions 81 located on the two forming clamping surfaces in each of the protrusion groups 8 are arranged longitudinally and staggered, so that the tubular tissue located in the forming cavity 20 forms more regular waves shape, so that the staples 324 can penetrate the tubular tissue more evenly and intermittently, and the purse bag formed is more reliable and not easy to slip off.

Each of the protrusions 81 is provided with a needle groove 811 passing through the protrusions 81 from the proximal end to the distal end, and the staples 324 pass through the protrusions 81 during the movement of the firing block 32 toward the distal end. The needle groove 811 penetrates the tubular tissue intermittently.

Specifically, each of the bumps 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, which are opposite and spaced apart. The connecting wall 814 Connected to the first holder 1 or the second holder 2 corresponding to the protrusion 81, the first wall 812, the second wall 813 and the connecting wall 814 jointly form the needle groove 811 for the Staples 324 are passed through.

The groups of bumps 8 correspond to the staples 324 one by one. It can be understood that, in the embodiment with two staples 324, the number of the groups of bumps 8 is also 2 groups, and the two groups The set of protrusions 8 are arranged at intervals along the transverse direction of the tissue closure device 100 to cooperate with the two staples 324 respectively.

The use process of the medical equipment in the utility model is:

As shown in FIGS. 5-7 , the firing assembly 3 is in the initial position, the second clip seat 2 is opened, and the tubular tissue is brought into the space between the first clip seat 1 and the second clip seat 2 ;

As shown in Figures 8-9, the screw rod 41 is driven to rotate forward by the firing handle, and the compression block 31 is driven to move a certain distance in the direction of the distal end, and the second clamping seat 2 is closed to clamp the For tubular tissue, at the same time, through the cooperation of the locking parts 23, 23' and the matching parts 17, 17', the first clamping seat 1 and the second clamping seat 2 are relatively fixed to prevent the tubular tissue from overflowing;

As shown in FIGS. 10-12 , the screw 41 continues to rotate positively, driving the compression block 31 and the firing block 32 to move in the distal direction, and the compression block 31 compresses the tubular body in the compression chamber 10 . The tissue is gradually gathered into the forming cavity 20; after the compression block 31 moves to the first firing position, the tubular tissue in the compression cavity 10 is completely gathered in the forming cavity 20, and Under the action of group 8, it forms a wave shape;

As shown in Figures 13-15, after the compression block 31 is at the firing position, the screw 41 continues to rotate forward, the compression block 21 is no longer driven by the screw 41, and at the same time, the firing block 32 continues to move toward the forming cavity 20, gradually approaches and passes through the relief portion, so that the staple 324 enters the forming cavity 20 and passes through the wavy tubular tissue, so as to align the forming cavity The tubular tissue in the cavity 20 is anastomosed, and the cutter 72 enters the forming cavity 20 to cut the tubular tissue in the forming cavity 20 to form a cluster purse that is tightened in the center;

As shown in Figures 16-18, after forming the bundle purse, the screw 41 rotates in the opposite direction, driving the firing block 32 to move proximally and gradually away from the compression block 31, and finally drives the compression block 31 from the The non-driving section 413 moves onto 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 second clip seat 2 is opened.

Compared with the prior art, the tissue closure device 100 in the present utility model completely gathers the tubular tissue in the compression cavity 10 into the forming cavity 20 through the compression block 31 in advance, and then compresses the forming cavity through the firing block 32 . The tubular tissue within 20 is anastomosed and cut, so that the volume of the formed purse is smaller, and finally a clustered purse with a tightened center is formed, which is more convenient to be accommodated into a tubular device later.

It should be understood that although this description is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for the feasible implementation modes of the present utility model, and they are not used to limit the protection scope of the present utility model. Embodiments or modifications should be included within the protection scope of the present utility model.

Claims (16)

1. A tissue closure device, comprising a first clip seat, a second clip seat that can be opened and closed relative to the first clip seat, a firing assembly, a driving mechanism for driving the firing assembly, and the second clip seat closes At this time, the second clip seat cooperates with the first clip seat to form a compression cavity and a molding cavity communicating with each other, the molding cavity is located at the far end of the compression cavity, and the firing assembly has a The initial position at the proximal end and the firing position at the far end of the compression cavity, wherein the firing assembly includes a split compression block and a firing block, the firing block is located at the proximal end of the compression block, Moreover, the compression block is provided with a compression part and a relief part pierced through the compression part. After the compression block moves to the firing position, when the firing block continues to move toward the molding cavity, the firing block At least part of the structure passes through the relief portion and enters the molding cavity. 2. The tissue closure device according to claim 1, wherein a first sliding groove extending from the proximal end of the first clamping seat to the distal end is provided on the first clamping seat, and the first clamping seat The second clamping seat is provided with a second sliding groove extending from the proximal end of the second clamping seat to the distal direction, and the compression block is slidingly engaged with the first sliding groove and the second sliding groove. 3. The tissue closure device according to claim 2, wherein at least one of the first clip seat and the second clip seat is provided with a stopper, when the compression block is at the fired position, , the compression part stops at the stop part. 4. The tissue closure device according to claim 3, wherein the first chute runs through the first clip seat along the height direction of the first clip seat, and the second chute runs along the height direction of the first clip seat. The height direction of the second clip seat runs through the second clip seat; the compression part is provided with a first pressing piece acting on the side of the first clip seat away from the second clip seat, acting on the The second pressing piece on the side of the second clamping seat away from the first clamping seat; the first pressing piece, the second pressing piece and the compression part drive the second clamping seat to close. 5. The tissue closure device according to claim 4, wherein the stop part comprises a first stop part provided on the first clip seat, and a stop part provided on the second clip seat. The second stopper, when the compression block is at the firing position, the first pressing piece is at the first stopper, and the second pressing piece is at the second stopper. 6. The tissue closure device according to claim 1, wherein the driving mechanism comprises a driving rod arranged on the first clamp seat and extending from the proximal end to the distal end, the driving rod includes a driving rod 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 are simultaneously with the drive segments cooperate, and in the second state, one of the compression block and the firing block cooperates with the driving segment. 7. The tissue closure device according to claim 6, wherein the driving rod further comprises a non-driving section located at the distal end of the driving section, and after the compression block is in the fired position, the compression block Cooperate with at least part of the non-driving section. 8. The tissue closure device according to claim 6 or 7, wherein the driving rod is a screw, the driving section of the screw is provided with threads, and the firing assembly is threadedly connected with the screw. 9. The tissue closure device according to claim 6 or 7, characterized in that: the firing assembly further comprises at least one linkage; the proximal end of the linkage is connected to the firing block, and the distal end is connected to the compression block ; The linkage piece 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 with the firing assembly, the linkage member includes a connecting rod extending from the proximal end to the distal end, and is arranged on the The anti-off parts at both ends of the connecting rod, the firing assembly is provided with a through slot for the connecting rod to pass through. 11. The tissue closure device according to claim 8, characterized in that: the screw rod further comprises a limit block at the distal end, and the first clamping seat is provided with a limit block matched with the limit block. groove. 12. The tissue closure device according to claim 1, wherein the firing block comprises a push nail piece and a cutting knife connected to the nail push piece and protruding in the direction of the distal end, set on the push nail There is at least one staple at the far end of the sheet; the relief part includes a nail guide groove for the staple and part of the pusher piece to pass through, and a knife guide groove for the cutter to pass through. 13. The tissue closure device according to claim 12, characterized in that: the staple pushing piece includes a staple-setting portion, and the staple-setting portion is provided with a first limiter for limiting the staple in the vertical direction. and a second limiting member for limiting the staples along the left and right directions. 14. The tissue closure device according to claim 12, wherein the number of the staples is two, and the two staples are respectively located on two sides of the cutter. 15. The tissue closure device according to claim 1, characterized in that: one of the distal ends of the first clamping seat and the distal end of the second clamping seat is provided with a locking member, and the other is provided with a locking member. A matching portion matched with the locking piece. 16. A medical device, comprising a device body, a tissue closure device detachably connected to the distal end of the device body, and a firing handle connected to the device body to act on the tissue closure device, characterized in that : The tissue closure device is the tissue closure device according to any one of claims 1-15.