Suturing device

Abstract

The present application belongs to the technical field of medical instruments. Disclosed is a suturing device, comprising a hollow tube and a capture component, wherein a control mechanism connected to the capture component in a driving manner is provided on a handle at the rear portion of the hollow tube; the control mechanism comprises a control button that has a first moving position, a second moving position and a third moving position; when the control button is located at the first moving position, a front end of the capture component is fully extended out of the hollow tube, and the capture component is in a fully extended state; when the control button is located at the second moving position, the front end of the capture component is located at the opening of the hollow tube and is pressed to close by the inner wall of the hollow tube, and the capture component is in a contracted and closed state; and when the control button is located at the third moving position, the front end of the capture component is completely retracted into the hollow tube, and the capture component is in a fully stored state. The suturing device of the present application can achieve the function of passing a suture through tissue and manipulating suturing, and the operation is simple and convenient.

Description

stapler Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a suturing device. Background Art

[0002] Endoscopic surgery allows surgeons to access the surgical site through a small incision, resulting in minimal trauma and rapid postoperative recovery. Surgical procedures requiring tissue repair or suturing can be performed using an endoscope. However, due to the relatively limited intraoperative field of view and space, threading and retrieving sutures can be challenging.

[0003] Some currently used suture passers have a ring-shaped or hook-shaped structure on the head, which closes after the suture is passed through it to pull the suture back. However, these devices may only have a retrieval function and still require other tools for suturing. Therefore, some suture passers combine suture retrieval and threading functions, with a pointed head that is easy to pass through soft tissue.

[0004] Potential issues with these tools include: the location of captured sutures, which makes them difficult for surgeons to manipulate; the excessive size of the head, which causes significant damage when traversing soft tissue; and the tendency to accidentally capture soft tissue, making release difficult and causing additional damage. Other issues include complexity, prolonged operation time, high cost, and inappropriate shape and length design. Technical issues

[0005] The present application provides a suturing device to solve the problems that the suturing devices in the prior art cannot realize the functions of threading through tissues and manipulating suturing, and the operation is complicated. Technical Solutions

[0006] To solve the above technical problems, this application provides the following technical solutions:

[0007] A stapler comprises a hollow tube and a capture member slidably connected within the hollow tube, a handle fixed to the rear of the hollow tube, and a control mechanism for driving the capture member is provided on the handle, wherein:

[0008] The control mechanism includes a control button slidably connected to the handle, the control button has a first moving position, a second moving position and a third moving position. When the control button is in the first moving position, the front end of the capture member is completely extended from the hollow tube and is in a fully extended state; when the control button is in the second moving position, the front end of the capture member is located at the tube mouth of the hollow tube and is squeezed by the inner wall of the hollow tube to form a closed state, and is in a contracted closed state; when the control button is in the third moving position, the front end of the capture member is completely retracted into the hollow tube and is in a fully retracted state.

[0009] Furthermore, the hollow tube includes a first straight main body portion located in the middle and proximal end, and a first curved portion located at the distal end, wherein:

[0010] The outer diameter of the first curved portion is smaller than the outer diameter of the first straight main body portion;

[0011] And / or, the front end of the first curved portion is a pointed end.

[0012] Furthermore, the first curved portion of the hollow tube includes a straight portion and a bent portion extending forward from the straight portion, wherein:

[0013] The bending part deflects only to one side;

[0014] Alternatively, the bent portion deflects to one side and then returns to a position close to the center line of the hollow tube.

[0015] Furthermore, when used for labral suturing, the angle between the bent portion and the straight portion is 15°-45°;

[0016] Alternatively, when used for rotator cuff suturing, the angle between the bent portion and the straight portion is 15°-45°, and the portion is offset to the left or right by 15°-45°;

[0017] Alternatively, when used for joint capsule suturing, the angle between the bent portion and the straight portion is 45°-70°;

[0018] Alternatively, when used for meniscus suturing, the angle between the bent portion and the straight portion is 15°-45°, and the portion is offset to the left or right by 15°-45°.

[0019] Furthermore, the capture member includes a second straight main body portion located at the middle and proximal end and a second curved portion located at the distal end, wherein:

[0020] The second curved portion is obtained by bending a straight rod;

[0021] Alternatively, the end of the second curved portion is S-shaped and is provided with a barb bent toward the distal end of the hollow tube;

[0022] Alternatively, the second curved portion includes a first forked end with a barb at the distal end and a second forked end for closing the barb, wherein the barb is bent away from the distal end of the hollow tube.

[0023] Furthermore, the angle between the second curved portion and the second straight main body portion is 0°-30°, and the left or right offset is 0°-45°;

[0024] and / or, the end of the second curved portion is a cylindrical straight rod, the diameter of which gradually decreases and forms a rounded tail end, a spike shape, or a tooth shape;

[0025] And / or, the capture member is made of memory alloy material having elasticity.

[0026] Furthermore, a button mounting hole and a slider mounting hole extending along the length direction are provided in the handle;

[0027] The control button includes a button body portion located in the button mounting hole and a button operating portion located outside the handle;

[0028] The control mechanism also includes a slider that is connected to the slider mounting hole for sliding forward and backward to increase the stroke of the control button. The front of the slider is arranged side by side with the button body. The lower end of the button body is hinged on the slider and drives the connection capture component.

[0029] Furthermore, a hinge column is provided at the lower portion of the slider, and a hinge hole is provided at the lower end of the button body to match the hinge column;

[0030] And / or, a hook is provided at the proximal end of the capture member, a connecting hole is provided above the hinged connection between the button body and the slider, and the hook is inserted into the connecting hole;

[0031] And / or, the slider is provided with a fan-shaped groove above the hinged portion with the button body, and the button body is provided with a limit pin that cooperates with the fan-shaped groove and is used to limit the rotation angle of the control button.

[0032] Furthermore, the slider is provided with an arc-shaped groove behind the hinged portion with the button body, a partition is provided in the arc-shaped groove, and the button body is provided with an elastic protrusion capable of moving in the arc-shaped groove. When the control button moves from the first moving position to the second moving position, the elastic protrusion passes over the partition;

[0033] And / or, a spring sheet extending forward is provided above the rear end of the slider, a card platform is provided at the front of the spring sheet, a card slot is provided above the slider mounting hole, the card slot cooperates with the card platform to prevent the slider from moving backward, and a spring sheet pressing portion is provided at the upper end of the button body behind the button operating portion. When the control button is in the second moving position and continues to be pressed backward, the spring sheet pressing portion squeezes the front end of the spring sheet, so that the spring sheet and the card slot are unlocked, thereby the control button pushes the slider to move backward.

[0034] Furthermore, a button slot extending along the length direction is provided on the handle, and the control button includes a vertical rod portion slidably connected in the button slot and a horizontal rod portion located outside the handle, and the lower end of the vertical rod portion drives the connection capture component.

[0035] Furthermore, a hook is provided at the proximal end of the capture member, and a connecting hole is provided at the lower end of the vertical rod portion, and the hook is inserted into the connecting hole;

[0036] and / or, a protrusion is provided in the middle of the button slide slot;

[0037] And / or, the crossbar portion is ridge-shaped. Beneficial effects

[0038] The suturing device of the present application has a control button placed in a first moving position, and the capturing member is in a fully extended state. The suture can be placed at the front end of the capturing member by moving the suturing device and / or the suture, and the control button is placed in a second moving position, and the capturing member is in a contracted and closed state, and the capturing member fixes the captured suture at the mouth of the hollow tube, and the control button is placed in a third moving position, and the capturing member is in a fully retracted state, and the capturing member retracts into the hollow tube and fixes the captured suture in the hollow tube, so that when the hollow tube and the capturing member pierce the tissue or are retrieved from the pierced tissue, the suture is carried to the other side of the tissue, and the suture is repeatedly captured and released by piercing or not piercing the tissue to achieve the purpose of passing the suture through the tissue, thereby realizing the function of threading and manipulating the suture through the tissue, and the operation is simple, so that the release and capture of the suture can be completed by one tool, without the need to repeatedly replace the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG1 is a schematic diagram of the overall structure of a stapler embodiment 1 of the present application;

[0040] FIG2 is a schematic diagram of the exploded structure of the stapler shown in FIG1 ;

[0041] FIG3 is a schematic diagram of the internal structure of the handle in FIG1 , wherein (a) is a perspective view and (b) is a front view of (a) (the control button is omitted);

[0042] FIG4 is a schematic structural diagram of the control button in FIG2 ;

[0043] FIG5 is a schematic structural diagram of the slider in FIG2 ;

[0044] FIG6 is a schematic diagram of the structure of the control button shown in FIG4 in the first moving position and the slider shown in FIG5 , wherein (a) is a front view and (b) is a schematic diagram of (a) with the control button omitted;

[0045] FIG7 is a schematic diagram of the structure of the control button shown in FIG4 in cooperation with the slider shown in FIG5 when the control button is in the second moving position, wherein (a) is a front view and (b) is a schematic diagram of (a) with the control button omitted;

[0046] FIG8 is an enlarged view of the front end of the stapler shown in FIG1 , wherein (a) is a schematic diagram of the control button in the first moving position, and (b) is a schematic diagram of the control button in the second moving position;

[0047] FIG9 is an enlarged view of the front end of the hollow tube in FIG1 , wherein (a) is a schematic diagram of structural form 1, and (b) is a schematic diagram of structural form 2;

[0048] FIG10 is a schematic diagram of the overall structure of a stapler embodiment 2 of the present application;

[0049] FIG11 is a schematic diagram of the exploded structure of the stapler shown in FIG10 ;

[0050] FIG12 is a schematic diagram of the matching structure of the capture member and the control button in FIG10;

[0051] FIG13 is a schematic structural diagram of the handle in FIG10;

[0052] FIG14 is an enlarged view of the front end of the stapler shown in FIG10 , wherein (a) is a schematic diagram of the control button in the first moving position, (b) is a schematic diagram of the control button in the second moving position, and (c) is a schematic diagram of the control button in the third moving position;

[0053] FIG15 is a schematic diagram of the front end structure of the capture component in FIG10 , wherein (a) is a front view and (b) is a top view of (a). Modes for Carrying Out the Invention

[0054] In order to make the technical problems, technical solutions and advantages to be solved by this application clearer, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0055] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0056] The present application provides a stapler, as shown in FIG1-15 , comprising a hollow tube 1 and a capture member 2 slidably connected within the hollow tube 1 , a handle 3 being fixed to the rear of the hollow tube 1 , and a control mechanism for driving the capture member 2 being provided on the handle 3 , wherein:

[0057] The control mechanism includes a control button 4 slidably connected to the handle 3, and the control button 4 has a first moving position, a second moving position and a third moving position. When the control button 4 is in the first moving position, the front end of the capture member 2 is completely extended from the hollow tube 1 and is in a fully extended state; when the control button 4 is in the second moving position, the front end of the capture member 2 is located at the tube mouth of the hollow tube 1 and is squeezed by the inner wall of the hollow tube 1 to form a closure (to pull back the suture), and is in a contracted closed state; when the control button 4 is in the third moving position, the front end of the capture member 2 is completely retracted into the hollow tube 1 and is in a fully retracted state.

[0058] When used during surgery, the handheld handle 3 is first used to place the control button 4 in the first moving position (i.e., the forward position), and the capture member 2 is in a fully extended state (see (a) in Figure 8 and (a) in Figure 14). The suture 10 can be placed at the front end of the capture member 2 by moving the suture device and / or the suture 10, and then the control button 4 is placed in the second moving position (i.e., the middle position), and the capture member 2 is in a contracted and closed state (see (b) in Figure 8 and (b) in Figure 14), and the capture member 2 fixes the captured suture 10 at the tube mouth of the hollow tube 1, and then the control button 4 is placed in the third moving position (i.e., the retracted position), and the capture member 2 is in a fully retracted state (see (c) in Figure 14), and the capture member 2 retracts into the hollow tube 1 and fixes the captured suture 10 in the hollow tube 1. When the front end of the hollow tube 1 and the front end of the capture member 2 pierce the tissue to be sutured or are retrieved from the pierced tissue to be sutured, the suture 10 is carried to the other side of the tissue. At this time, the control button 4 is placed in the first moving position, and the capture member 2 releases the captured suture 10, completing a tissue threading operation. The above operation is repeated, by piercing or not piercing the tissue to be sutured, and repeatedly capturing and releasing the suture until the suture of the tissue to be sutured is completed.

[0059] The suturing device of the present application has a control button placed in a first moving position, and the capturing member is in a fully extended state. The suture can be placed at the front end of the capturing member by moving the suturing device and / or the suture, and the control button is placed in a second moving position, and the capturing member is in a contracted and closed state, and the capturing member fixes the captured suture at the mouth of the hollow tube, and the control button is placed in a third moving position, and the capturing member is in a fully retracted state, and the capturing member retracts into the hollow tube and fixes the captured suture in the hollow tube. In this way, when the hollow tube and the capturing member pierce the tissue or are retrieved from the pierced tissue, the suture is carried to the other side of the tissue, and the suture is repeatedly captured and released by piercing or not piercing the tissue to achieve the purpose of passing the suture through the tissue, thereby realizing the function of threading and manipulating the suture through the tissue, and the operation is simple, so that the release and capture of the suture can be completed by one tool, and there is no need to repeatedly change the tool.

[0060] The present application is applicable to endoscopic surgery, and specifically relates to a suturing device used under an endoscope and capable of passing sutures through tissues. It has the functions of grasping and suturing in one. The capturing component is connected to the control button. When the control button is pushed back and forth, the capturing component moves back and forth in the hollow tube. Through this position change, the suture can be grasped / released (hooked / released). It is widely used in medical scenarios that require sutures to be delivered and / or retrieved through tissues, including but not limited to the outside-to-inside repair of the labrum, rotator cuff, joint capsule, and meniscus.

[0061] As shown in Figure 2, the hollow tube 1 can include a first straight main portion 11 at the middle and proximal end and a first curved portion 12 at the distal end (in the direction indicated by the arrow in Figure 1). The outer diameter of the first curved portion 12 can be smaller than that of the first straight main portion 11. This allows the first curved portion 12 of the hollow tube 1 to be made thinner and more compact while ensuring puncture performance and a certain strength, effectively reducing damage to soft tissue. The design of the first curved portion 12 also reduces the risk of impact with surrounding tissue, ensuring comfortable operation for the user. The front end of the first curved portion 12 can be pointed, specifically needle-shaped, to facilitate soft tissue puncture and facilitate tissue penetration. The distal end of the hollow tube 1 can be passed through the tissue from either the opposite side or the same side.

[0062] As shown in FIG. 8 , the first curved portion 12 of the hollow tube 1 may include a straight portion 121 and a bent portion 122 extending forward from the straight portion 121 .

[0063] According to the different bending parts 122, the present application can have the following structural forms:

[0064] Structural form 1: As shown in FIG9 (a), the bending portion 122 can be deflected to one side only, that is, the straight shape of the straight portion 121 of the first curved portion 12 remains unchanged until it is deflected to one side, specifically in an L-shape, to avoid tissue.

[0065] In this structural form, when used for labrum suturing, the angle α between the bent portion 122 and the straight portion 121 can be 15°-45°, preferably 30°, so as to facilitate vertical puncture of the tissue at the junction of the labrum and cartilage when suturing the labrum, avoid damaging the cartilage, and improve the puncture efficiency of the suturing.

[0066] When used for suturing the joint capsule, the angle α between the bent portion 122 and the straight portion 121 may be 45°-70°, preferably 70°, to facilitate puncturing the thick and tough joint capsule when suturing the joint capsule.

[0067] Structural form 2: As shown in FIG9( b ), the bent portion 122 can be deflected to one side and then adjusted back to a position close to the center line of the hollow tube 1 , specifically in a C-shape, etc., to avoid tissue.

[0068] In this structural form, when used for rotator cuff suturing, the angle α between the bent portion 122 and the straight portion 121 can be 15°-45°, preferably 45°, and can be offset to the left or right by 15°-45° (i.e., angle β in the figure). For example, 30° is used to facilitate vertical puncture of the soft tissue during rotator cuff suturing, thereby improving puncture efficiency.

[0069] When used for meniscus suturing, the angle α between the bent portion 122 and the straight portion 121 can be 15°-45°, preferably 45°, and can be offset to the left or right by 15°-45° (i.e., angle β in the figure), for example, 30°, to facilitate vertical puncture of the soft tissue when suturing the meniscus, thereby improving the puncture efficiency of the suturing.

[0070] In this application, the bending portion 122 of the first curved portion 12 of the hollow tube 1 has a variety of bending angles to achieve puncture in different situations. For suturing at different positions, the angle of the bending portion 122 of the first curved portion 12 can be adjusted to achieve better surgical results.

[0071] As shown in FIG2 , the capture member 2 may include a second straight main body portion 21 located in the middle and proximal end and a second curved portion 22 located at the distal end. Depending on the second curved portion 22 , the present application may have the following structural forms:

[0072] Structural form three (not shown): the second curved portion 22 may be obtained by bending a straight rod.

[0073] Structural form four: As shown in Figure 8, the end of the second curved portion 22 can be S-shaped and provided with a barb 23 bent toward the distal end of the hollow tube 1 (at this time, the barb 23 can cooperate with the inner wall at the mouth of the hollow tube 1 to form a closure), and the shape of the barb 23 is convenient for grabbing the suture.

[0074] Structural form five: As shown in Figure 14, the second curved portion 22 can be in the shape of a hanging box hook, that is, it includes a first forked end 221 with a barb 223 at the end and a second forked end 222 for closing the barb 223 (at this time, the second forked end 222 can be squeezed by the inner wall at the mouth of the hollow tube 1 to move toward the first forked end 221 to close the barb 223), and the barb 223 is bent back toward the distal end of the hollow tube 1.

[0075] In the fifth structural form, as shown in FIG15 , the angle γ between the second curved portion 22 and the second straight main portion 21 can be 0°-30°, preferably 10°-15°, and can be offset to the left or right by 0°-45° (i.e., the angle δ in the figure) to accommodate more operating space and prevent damage to the surrounding soft tissue and cartilage.

[0076] In the present application, the end of the second curved portion 22 of the capture member 2 can be treated differently: it can be a cylindrical straight rod consistent with the second straight main body 21; or the diameter gradually decreases and forms a rounded tail end; or it can be in the shape of a spike to fix the suture 10 in the form of puncture; or it can be in the shape of teeth to strengthen the capture of the suture 10. The front end of the second curved portion 22 can be a pointed tip, specifically a sharp and strong needle for puncturing soft tissue. The capture member 2 can be a memory alloy material with elasticity, specifically nickel-titanium alloy, or other metals, alloys, composite materials, etc. The overall size and bending angle of the suture device of the present application are reasonably designed. The suture device is not easy to hit the surrounding tissue when working, and the user is comfortable to operate.

[0077] In order to facilitate the control mechanism to drive the connection capture member 2 to achieve the three movement positions of the control button 4 and the three states of the capture member 2, the present application may have the following embodiments: Example

[0078] As shown in FIG. 1-9 , the handle 3 may be provided with a button mounting hole 31 and a slider mounting hole 32 extending along the length direction.

[0079] The control button 4 includes a button body portion 41 located in the button mounting hole 31 and a button operating portion 42 located outside the handle 3 .

[0080] The control mechanism also includes a slider 5 that is slidably connected to the slider mounting hole 32 for increasing the stroke of the control button 4. The front of the slider 5 is arranged side by side with the button main body 41. The lower end of the button main body 41 is hinged on the slider 5 and drives the connection capture component 2.

[0081] In this embodiment, the control button 4 is pushed forward and backward, and the control button 4 rotates / sways forward and backward in the button mounting hole 31, that is, the control button 4 makes a circular motion in the button mounting hole 31, and the slider 5 moves forward or backward in the slider mounting hole 32, thereby converting the curved rotation into a linear motion, directly driving the capture member 2 to retract / extend into the hollow tube 1, so as to realize the functions of threading through the tissue and manipulating suturing, and the operation is simple.

[0082] As shown in Figures 4-7, the lower portion of the slider 5 may be provided with a hinge post 51, and the lower end of the button body 41 may be provided with a hinge hole 43 that cooperates with the hinge post 51, so that the lower end of the button body 41 is hinged to the slider 5. It is conceivable that the lower portion of the slider 5 may also be provided with a hinge hole, and the lower end of the button body 41 may be provided with a hinge post that cooperates with the hinge hole.

[0083] As shown in Figures 2 and 7, the proximal end (rear end) of the capture member 2 can be provided with a hook 24, and the button body 41 is provided with a connecting hole 44 above the hinge with the slider 5, and the hook 24 is inserted into the connecting hole 44 to realize the lower end of the button body 41 driving the connection capture member 2.

[0084] Continuing with Figures 4-7, the slider 5 may be provided with a fan-shaped groove 52 above the hinge with the button body 41, and the button body 41 is provided with a limit pin 45 that cooperates with the fan-shaped groove 52 and is used to limit the rotation angle of the control button 4. The fan-shaped groove 52 and the limit pin 45 cooperate to limit the rotation angle and movement range of the control button 4, thereby avoiding excessive forward / backward movement of the capture component 2 and causing inconvenience to the operation.

[0085] The slider 5 may be provided with an arc-shaped groove 53 at the rear of the hinge with the button body 41, and a partition 54 is provided in the arc-shaped groove 53 (the partition 54 can be specifically located in the middle of the arc-shaped groove 53), and an elastic protrusion 46 that can move in the arc-shaped groove 53 is provided on the button body 41. When the control button 4 moves from the first moving position to the second moving position, the elastic protrusion 46 passes over the partition 54. In this way, in the process of pushing the control button 4 back and forth, the elastic protrusion 46 on the button body 41 cooperates with the arc-shaped groove 53 on the slider 5 and rotates along the trajectory of the arc-shaped groove 53. When the elastic protrusion 46 approaches the partition 54 and contacts the partition 54, the two squeeze each other, and there is a resistance feedback at the position of the partition 54, reminding the control button 4 that it has been rotated into place or is about to start rotating. When the control button 4 reaches or passes the second moving position, the resistance is released.

[0086] It will be appreciated that, due to its elasticity, the elastic protrusion 46 can span the partition 54 without hindering the normal rotation of the control button 4. The elastic protrusion 46 can be formed by providing a pair of interconnected slots 47 on the button body 41, thereby forming an elastic arm 48 between the pair of slots 47. The elastic protrusion 46 is provided on the distal surface of the elastic arm 48. It should be noted that the right-angled trapezoidal groove and the arcuate groove 53 at the front end of the slider 5 are both blind holes in the figures and are therefore not visible in certain angles.

[0087] A spring plate 55 extending forward may be provided above the rear end of the slider 5. A latch 56 may be provided at the front of the spring plate 55. A slot 33 is provided above the slider mounting hole 32 to cooperate with the latch 56 and prevent the slider 5 from moving backward (the latch 33 and the latch 56 cooperate, and the latch 56 is normally retained within the slot 33, restricting the slider 5 from moving backward). A spring plate pressing portion 49 is provided at the upper end of the button body 4, behind the button operating portion 42. When the control button 4 is in the second moving position and the control button 4 is further pressed backward, the spring plate pressing portion 49 compresses the front end of the spring plate 55, releasing the spring plate 55 from the latch 33 (see FIG. 7 (a), at which point the slider 5 can move backward within the slider mounting hole 32). The control button 4 then pushes the slider 5 backward, causing the capture member 2 to enter a fully retracted state while increasing the travel of the control button 4. The capture member 2 in this embodiment adopts the capture member 2 of the fourth structural form described above, although other capture member forms may also be used.

[0088] In summary, the usage process of this embodiment can be referred to as follows:

[0089] Initially, the control button 4 is placed in the second moving position, the front end of the capture member 2 is located at the mouth of the hollow tube 1, and is in a retracted and closed state; when in use, the handheld handle 3 pushes the control button 4 forward, and the control button 4 makes a circular motion forward in the button mounting hole 31 with the hinge column 51 of the slider 5 as the center, and the limit pin 45 and the elastic protrusion 46 on the button body 41 of the control button 4 slide in the fan-shaped groove 52 and the arc groove 53 of the slider 5 respectively, and the elastic protrusion 46 passes over the partition 54 in the arc groove 53 until the limit pin 45 abuts against the front side wall of the fan-shaped groove 52 (see (b) in Figure 6), the control button 4 is placed in the first moving position, the capture member 2 is in a fully extended state, and the suture 10 can be moved to place the suture 10 at the front end of the capture member 2, and then the control button 4 is pushed backward. , the elastic protrusion 46 contacts the partition 54 in the arc-shaped groove 53, providing feedback force at the position of the partition 54, reminding the control button 4 to be in the second moving position, the capture member 2 is in a retracted and closed state, the capture member 2 fixes the captured suture 10 at the tube mouth of the hollow tube 1, and the limit pin 45 abuts against the rear side wall of the fan-shaped groove 52 (see Figure 7 (b)), continue to push / press the control button 4 backward, the spring pressing portion 49 of the control button 4 squeezes the front end of the spring 55 of the slider 5, and the spring 55 forms an inward state, so that the spring 55 is unlocked from the slot 33 of the slider mounting hole 32, and the control button 4 pushes the slider 5 to move backward. The control button 4 is placed in the third moving position, the capture member 2 is in a fully retracted state, the capture member 2 retracts into the hollow tube 1, and the captured suture 10 is fixed in the hollow tube 1. Example

[0090] As shown in Figures 10-15, the handle 3 can be provided with a button groove 34 extending along the length direction, and the control button 6 includes a vertical rod portion 61 slidingly connected in the button groove 34 and a horizontal rod portion 62 located on the outside of the handle 3, and the lower end of the vertical rod portion 61 drives the connection capture component 2.

[0091] In this embodiment, the control button 6 directly drives the capture member 2 to move forward and backward, which has a simple structure and is easy to operate. The capture member 2 in this embodiment adopts the capture member 2 of the above-mentioned structural form 5, and of course other forms of capture members can also be used.

[0092] As shown in Figure 11, the proximal end of the capture member 2 can be provided with a hook 24, and the lower end of the vertical rod part 61 is provided with a connecting hole 63, and the hook 24 is inserted into the connecting hole 63 to enable the lower end of the vertical rod part 61 to drive and connect the capture member 2.

[0093] As shown in FIG13 , the middle portion of the button chute 34 can be provided with a protrusion 35 (specifically, corresponding to the second movement position of the control button 6 ). Thus, when the control button 6 is pushed backward, the capture member 2 is retracted. When the vertical rod portion 61 of the control button 6 reaches the position of the protrusion 35 in the button chute 34 , there is a pause, which indicates that the capture member 2 has retracted a certain distance. Further backward pushing of the control button 6 will cause the capture member 2 to retract further. This also provides an anti-retraction function. When soft tissue pulls back on the suture 10, causing it to rewind, the protrusion 35 can, to a certain extent, prevent the control button 6 from moving forward, thereby preventing the suture 10 from rewinding. As shown in FIG12 , the horizontal rod portion 62 can be ridge-shaped (i.e., triangular) to facilitate pushing the control button 6 forward and backward.

[0094] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A stapler, comprising a hollow tube and a capture member slidably connected in the hollow tube, a handle fixedly provided at the rear of the hollow tube, a control mechanism for driving and connecting the capture member provided on the handle, characterized in that: The control mechanism comprises a control button slidably connected to the handle, the control button having a first moving position, a second moving position and a third moving position, when the control button is in the first moving position, the front end of the capture member is completely extended out of the hollow tube and is in a fully extended state; When the control button is in the second moving position, the front end of the capture member is located at the tube mouth of the hollow tube and is squeezed by the inner wall of the hollow tube to form a closed state, and is in a contracted closed state; When the control button is in the third moving position, the front end of the capture member is completely retracted into the hollow tube and is in a completely retracted state.

2. The stapler according to claim 1, characterized in that: The hollow tube comprises a first straight main body portion located in the middle and the proximal end, and a first curved portion located at the distal end, wherein: The outer diameter of the first curved portion is smaller than the outer diameter of the first straight main body portion; And / or, the front end of the first curved portion is a pointed end.

3. The stapler according to claim 2, characterized in that: The first curved portion of the hollow tube includes a straight portion and a bent portion extending forward from the straight portion, wherein: The bending portion is deflected only to one side; Alternatively, the bent portion deflects to one side and then returns to a position close to the center line of the hollow tube.

4. The stapler according to claim 3, characterized in that: When used for labrum suturing, the angle between the bent portion and the straight portion is 15°-45°; Alternatively, when used for rotator cuff suturing, the angle between the bent portion and the straight portion is 15°-45°, and the angle is offset to the left or right by 15°-45°; Alternatively, when used for joint capsule suturing, the angle between the bent portion and the straight portion is 45°-70°; Alternatively, when used for meniscus suturing, the angle between the bent portion and the straight portion is 15°-45°, and is offset to the left or right by 15°-45°.

5. The stapler according to claim 1, characterized in that: The capture member comprises a second straight body portion at the middle and proximal end and a second curved portion at the distal end, wherein: The second curved portion is obtained by bending a straight rod; Alternatively, the end of the second curved portion is S-shaped and is provided with a barb bent toward the distal end of the hollow tube; Alternatively, the second curved portion includes a first forked end with a barb at the end and a second forked end for closing the barb, and the barb is bent away from the distal end of the hollow tube.

6. The stapler according to claim 5, characterized in that: The angle between the second curved portion and the second straight main body portion is 0°-30°, and the second curved portion is offset to the left or right by 0°-45°; And / or, the end of the second curved portion is a cylindrical straight rod, the diameter of which gradually decreases and forms a rounded tail end, a spike shape, or a tooth shape; And / or, the capture member is made of memory alloy material having elasticity.

7. The stapler according to any one of claims 1 to 6, characterized in that: The handle is provided with a button mounting hole and a slider mounting hole extending along the length direction; The control button includes a button body located in the button installation hole and a button operating part located outside the handle; The control mechanism also includes a slider that is slidably connected to the slider mounting hole for increasing the travel of the control button. The front part of the slider is arranged side by side with the button body, and the lower end of the button body is hinged on the slider and driven to connect to the capture member.

8. The stapler according to claim 7, characterized in that: A hinge column is provided at the lower part of the slider, and a hinge hole matching with the hinge column is provided at the lower end of the button body; And / or, a hook is provided at the proximal end of the capture member, a connection hole is provided above the hinged portion of the button body with the slider, and the hook is inserted into the connection hole; And / or, the slider is provided with a fan-shaped groove above the hinged part with the button body, and the button body is provided with a limit pin which cooperates with the fan-shaped groove and is used to limit the rotation angle of the control button.

9. The stapler according to claim 8, characterized in that: The slider is provided with an arc-shaped groove behind the hinged part with the button body, a partition is provided in the arc-shaped groove, and an elastic protrusion capable of moving in the arc-shaped groove is provided on the button body, and when the control button moves from the first moving position to the second moving position, the elastic protrusion passes over the partition; And / or, a spring sheet extending forward is provided above the rear end of the slider, a card platform is provided at the front part of the spring sheet, a card slot is provided above the slider mounting hole, the card slot cooperates with the card platform to prevent the slider from moving backward, and a spring sheet pressing portion is provided at the upper end of the button body behind the button operating portion, when the control button is in the second moving position and the control button continues to be pressed backward, the spring sheet pressing portion squeezes the front end of the spring sheet so that the spring sheet is unlocked from the card slot, thereby the control button pushes the slider to move backward.

10. The stapler according to any one of claims 1 to 6, characterized in that: The handle is provided with a button slot extending along the length direction. The control button includes a vertical rod portion slidably connected to the button slot and a horizontal rod portion located outside the handle. The lower end of the vertical rod portion is drivingly connected to the capture component.

11. The stapler according to claim 10, characterized in that: A hook is provided at the proximal end of the capture member, and a connecting hole is provided at the lower end of the vertical rod, and the hook is inserted into the connecting hole; And / or, a protrusion is provided in the middle of the button slide groove; And / or, the cross bar portion is ridge-shaped.

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