Suture locking system

Abstract

The invention discloses a suture line locking system which comprises a sheathing canal, a bolt head assembly arranged at the far end of the sheathing canal, a supporting sleeve arranged in the sheathing canal and an ejector rod movably arranged in the supporting sleeve, the bolt head assembly is used for locking a suture line, and the far end of the supporting sleeve is connected with the bolt head assembly. Or the far end of the supporting sleeve is connected with the inner wall, close to the far end, of the sheathing canal or the far end of the sheathing canal, and the near end of the supporting sleeve is fixed; in the process that the ejector rod moves towards the far end, the far end of the ejector rod can push the bolt head assembly, and at least part of the bolt head assembly is pushed out of the sheathing canal. According to the suture locking system, the supporting sleeve can provide pulling force towards the near end so as to offset pushing force of at least part of the ejector rod towards the far end, the sheath tube is helped to share the pushing force of at least part of the ejector rod towards the far end, and therefore the probability that the sheath tube is lengthened and deformed is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a suture locking system. Background Art

[0002] Generally in surgical operations, it is necessary to knot and fix sutures. Since surgical operations are generally carried out under the direct vision of doctors, usually doctors tie knots manually. However, currently, minimally invasive surgeries and interventional surgeries are increasingly widely used due to their advantages of small trauma and fast recovery. Taking transcatheter interventional surgery as an example, it is necessary to insert instruments such as catheters into the patient's body, reach the predetermined position and perform suture treatment. After completing the suture operation, it is necessary to use a knotting instrument to capture the suture and extend it to the suture position, remotely operate the knotting instrument outside the patient's body to complete the knotting of the suture in the patient's body, cut the knotted suture, and withdraw the cut suture out of the patient's body with the knotting instrument to complete the operation.

[0003] In existing devices, by pushing a push rod in an outer sheath tube to move distally to squeeze a chuck assembly provided at the distal end of the outer sheath tube, the chuck assembly is deformed to clamp and lock the suture passing through the chuck assembly. Therefore, in order to deform the chuck assembly, a relatively large pushing force needs to be applied by the push rod. When a relatively large pushing force is applied by the push rod, it is easy to elongate and deform the outer sheath tube, and cause the problem that the plug head is difficult to fall off from the outer sheath tube. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the pushing force applied by the push rod to the chuck assembly easily elongates and deforms the outer sheath tube. In view of the defects of the prior art, a suture locking system is provided.

[0005] The present invention solves its technical problems through the following technical solutions:

[0006] A suture locking system, the suture locking system includes a sheath tube, a plug head assembly provided at the distal end of the sheath tube, a support sleeve provided in the sheath tube, and a push rod movably provided in the support sleeve. The plug head assembly is used for locking the suture. The distal end of the support sleeve is connected to the plug head assembly, or the distal end of the support sleeve is connected to the inner wall of the sheath tube near the distal end or the distal end of the sheath tube. The proximal end of the support sleeve is fixed. During the process of the push rod moving distally, the distal end of the push rod can push the plug head assembly to push at least a part of the plug head assembly out of the sheath tube.

[0007] The above suture knotting system adds a support sleeve inside the sheath tube, and one end of the support sleeve is connected to the plug head assembly, or the distal end of the support sleeve is connected to the inner wall near the distal end of the sheath tube or the distal end of the sheath tube. The other end of the support sleeve is fixed. When the ejector rod moves distally and pushes the plug head assembly, the support sleeve can provide a pulling force towards the proximal end to at least offset part of the pushing force of the ejector rod towards the distal end. Therefore, the support sleeve can at least help the sheath tube share part of the pushing force of the ejector rod towards the distal end, thereby reducing the probability of the sheath tube being stretched and deformed, preventing some components of the plug head assembly (such as the following knotting parts) from failing to fall off the sheath tube due to the stretched and deformed sheath tube when they need to fall off the sheath tube, and thus improving the success rate of knotting. Brief Description of the Drawings

[0008] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0009] Figure 1 is a schematic structural diagram of an exemplary suture knotting system of the present invention;

[0010] Figure 2 is an exploded view of the parts of an exemplary suture knotting system of the present invention;

[0011] Figure 3 is a partial cross-sectional view of an exemplary suture knotting system of the present invention;

[0012] Figure 4 is a partial cross-sectional view of the plug head assembly, sheath tube, support sleeve, blade tube and ejector rod of an exemplary suture knotting system of the present invention;

[0013] Figure 5 is a cross-sectional view of the plug seat and plug head of an exemplary suture knotting system of the present invention;

[0014] Figure 6 is a schematic assembly structural diagram of the driving mechanism of an exemplary suture knotting system of the present invention;

[0015] Figure 7 is an exploded view of the parts of the driving mechanism of an exemplary suture knotting system of the present invention;

[0016] Figure 8 is a schematic structural diagram of an exemplary suture knotting system of the present invention;

[0017] Figure 9 is Figure 8 a partial enlarged view of part A in

[0018] Figure 10 is a schematic structural diagram of the support sleeve and pipe clamp in an exemplary suture knotting system of the present invention;

[0019] Figure 11 Schematic structural view of the blade tube in an exemplary suture locking system of the present invention;

[0020] Figure 12 Partial cross-sectional view of the bolt head assembly, sheath tube, support sleeve, blade tube and ejector rod of an exemplary suture locking system of the present invention;

[0021] Figure 13 Cross-sectional view of the bolt seat and bolt head of an exemplary suture locking system of the present invention;

[0022] Figure 14 Schematic diagram of the bolt head, bolt pin and suture after the suture locking and cutting are completed in an exemplary suture locking system of the present invention.

[0023] The reference signs in the drawings are shown as follows:

[0024] 100, suture locking system;

[0025] 10, handle; 11, upper housing; 12, lower housing; 13, end cap; 14, stress relief sleeve; 141, fixing part; 142, tubular part; 101, accommodating cavity; 102, first sliding structure; 103, first fixing groove; 104, end cap mounting part; 105, second fixing groove; 106, supporting part; 1061, slot;

[0026] 20, sheath tube; 21, second wire passing hole;

[0027] 30, bolt head assembly; 31, bolt seat; 311, first stepped section; 312, second stepped section; 313, third stepped section; 314, step surface; 315, seat hole; 3151, first stepped section; 3152, second stepped section; 3153, clamping groove; 3154, annular groove; 316, cutting part; 317, stop groove; 32, bolt head; 321, pin hole; 322, annular protrusion; 323, stop part; 33, bolt pin; 331, main body part; 332, limiting part; 333, protruding part; 301, wire passing channel; 34, locking part;

[0028] 40, blade tube; 41, main body section; 42, cutting section; 421, blade part; 401, first clamping groove;

[0029] 50, ejector rod;

[0030] 60. Driving mechanism; 61. Swirling-in part; 611. Sliding connection part; 6111. Chute; 6112. First pin hole; 612. Threaded mating part; 613. Link part; 6131. Rotation limiting part; 6132. Limiting gap; 614. Through hole; 62. Fixing part; 621. Threaded hole; 63. Moving part; 631. Rotating connection part; 6311. Rotation limiting hole; 6312. Second pin hole; 632. Fixed connection part; 6321. First fastening hole; 6322. Second fastening hole; 633. First side wall; 634. Second side wall; 6301. Second sliding structure; 6302. Avoidance groove; 64. Knob; 641. Slide block;

[0031] 70. Support sleeve; 71. First wire passing hole; 72. Second clamping groove;

[0032] 80. Connecting sleeve;

[0033] 90. Lead wire device; 91. Lead wire handle; 92. Lead wire; 911. Cantilever part;

[0034] 1001. First pin; 1002. Second pin; 1003. Pipe clamp; 10031. Third clamping groove; 1004. Fastening screw;

[0035] 200. Suture. Detailed implementation manner

[0036] For a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0037] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0038] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0039] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0040] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such relative relationship terms such as "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both the above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.

[0041] It should be noted that the terms "distal end" and "proximal end" are commonly used terms in the field of interventional medical devices. The "distal end" refers to the end away from the operator during the surgical procedure, and the "proximal end" refers to the end close to the operator during the surgical procedure. The axial direction refers to the direction parallel to the line connecting the centers of the distal end and the proximal end of the medical device; the radial direction refers to the direction perpendicular to the above axial direction.

[0042] Please refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, a suture knotting system 100 is proposed, which includes a sheath tube 20, a plug head assembly 30, a handle 10, a blade tube 40, a push rod 50, and a driving mechanism 60. The plug head assembly 30 is arranged on the distal side of the sheath tube 20. The plug head assembly 30 has a threading channel 301 communicating with the sheath tube 20. The suture 200 can extend into the sheath tube 20 through the threading channel 301. The proximal end of the sheath tube 20 is connected to the handle 10. The push rod 50 is arranged in the sheath tube 20, and the push rod 50 can move relative to the sheath tube 20 along the axial direction of the sheath tube 20. The driving mechanism 60 is movably arranged on the handle 10. The proximal end of the push rod 50 is connected to the driving mechanism 60, and the driving mechanism 60 can drive the push rod 50 to move axially along the sheath tube 20 during the movement. When the push rod 50 moves distally along the axis of the sheath tube 20, the distal end of the push rod 50 can squeeze the plug head assembly 30, and the plug head assembly 30 can be changed from the initial state to the knotting state under the squeezing action of the push rod 50, thereby knotting the suture passing through the plug head assembly 30. In other embodiments, the suture knotting system 100 may not include the handle 10 as long as the driving mechanism 60 can control the blade tube 40 and the push rod 50.

[0043] It should be noted that, as Figure 4 and Figure 5 shown, the initial state of the plug head assembly 30 refers to the state where the threading channel 301 is unobstructed. At this time, the suture 200 can freely enter and exit the threading channel 301, or the suture 200 can freely move in the threading channel 301. As Figure 5 and Figure 14As shown, the locked state of the plug head assembly 30 refers to the state where the threading channel 301 is closed and the suture is locked. At this time, the suture 200 is fixedly connected to at least some of the components in the plug head assembly 30. Understandably, the plug head assembly 30 can be provided with various structural forms to realize the transition from the initial state to the locked state. For example, in some embodiments, the plug head assembly 30 can be deformed as a whole under the extrusion of the distal end of the ejector rod 50, causing the threading channel 301 to bend and deform, and the inner wall of the threading channel 301 to deform radially and clamp and fix the suture 200. Or, in some other embodiments, through the cooperation between different components in the plug head assembly 30, under the extrusion of the ejector rod 50, some components in the plug head assembly 30 are displaced to block the threading channel 301, so as to clamp and fix the suture 200 in the threading channel 301. Or, in another embodiment, it is not necessary for the ejector rod 50 or other components to extrude the plug head assembly 30 to realize the locked state. The plug head assembly 30 can always be in an automatic locking state. For example, an automatically lockable channel is provided inside the plug head assembly 30, the inner diameter of this channel is smaller than the outer diameter of the suture, the inside of the plug head assembly 30 is made of an elastic material, the suture 200 is inserted into this channel, and the suture 200 and the plug head assembly 30 can be fixed to each other without external force. Then, the plug head assembly 30 is pushed by the ejector rod 50 to push at least part of the plug head assembly 30 out of the sheath 20. Or, in another embodiment, the ejector rod 50 can be not provided, and the plug head assembly 30 can always be in a locked state. For example, an automatically lockable channel is provided inside the plug head assembly 30, the inner diameter of this channel is smaller than the outer diameter of the suture, the inside of the plug head assembly 30 is made of an elastic material, the suture 200 is inserted into this channel, and the suture 200 and the plug head assembly 30 can be fixed to each other without external force. When the sheath 20 is withdrawn backward, the plug head assembly 30 can fall off from the sheath 20.

[0044] Further, as Figure 4 shown, the plug head assembly 30 further includes a cutting part 316 located inside the sheath 20. The blade tube 40 is sleeved outside the ejector rod 50 and is located inside the sheath 20. The blade tube 40 can move axially relative to the sheath 20 along the sheath 20. A blade part 421 is provided at the distal end of the blade tube 40. The blade part 421 is disposed opposite to the cutting part 316, and the blade part 421 is in contact and cooperation with the cutting part 316. Specifically, the contact and cooperation means that during the axial movement of the blade tube 40 along the sheath 20, the blade part 421 and the cutting part 316 can be switched between two states of separation and contact. When the blade tube 40 moves axially toward the proximal side, the blade part 421 moves away from and separates from the cutting part 316. When the blade tube 40 moves axially toward the distal side, the blade part 421 moves closer to and abuts against the cutting part 316.

[0045] Specifically, please refer to Figure 4 、 Figure 5 andFigure 12 As shown, the suture 200 can extend into the sheath 20 through the threading channel 301 and be positioned between the cutting portion 316 and the blade portion 421. During the process of the blade tube 40 moving axially distally along the sheath 20 relative to the sheath 20, the blade portion 421 can contact the cutting portion 316 and clamp the suture 200 between the blade portion 421 and the cutting portion 316.

[0046] In this embodiment, please refer to Figure 6 、 Figure 8 and Figure 12 As shown, the proximal end of the blade tube 40 is connected to the driving mechanism 60. During the process of the driving mechanism 60 moving relative to the handle 10, the driving mechanism 60 can at least drive the blade tube 40 to rotate about its own axis. When the blade portion 421 contacts the cutting portion 316 and clamps the suture 200 between the cutting portion 316 and the blade portion 421, the driving mechanism 60 drives the blade tube 40 to rotate about its own axis, so that the blade portion 421 rotates relative to the cutting portion 316, and further enables the blade portion 421 to cut the suture 200 in a manner of rotating relative to the cutting portion 316. The blade portion 421 can simultaneously apply pressure and cutting force to the suture 200, improving the cutting effect of the blade portion 421 on the suture 200 and reducing the difficulty of cutting off the suture 200. Moreover, compared with the method of only squeezing and breaking the dividing line, the technical solution proposed by the present invention cuts the suture 200 by rotating the blade portion 421 relative to the cutting portion 316, requiring less pressure for cutting the line, which can reduce the pushing force applied by the blade tube 40 on the plug head assembly 30 and the pressure between the blade portion 421 and the cutting portion 316, and reduce the probability of damage to the blade tube 40 or the sheath 20.

[0047] In some embodiments, please refer to Figure 4 、 Figure 8 and Figure 9As shown, the suture locking system 100 further includes a support sleeve 70. The support sleeve 70 is sleeved outside the ejector rod 50 and is disposed inside the sheath tube 20. Specifically, the support sleeve 70 is disposed inside the cutting tube 40. The distal end of the support sleeve 70 is connected to the plug head assembly 30, and the proximal end of the support sleeve 70 is fixedly connected to the handle 10. By adding the support sleeve 70 inside the sheath tube 20, when the ejector rod 50 moves distally and presses the plug head assembly 30, the support sleeve 70 can provide a pulling force towards the proximal end for the plug head assembly 30 to at least offset part of the pushing force of the ejector rod 50 towards the distal end. Therefore, the support sleeve 70 can at least help the sheath tube 20 share part of the pushing force of the ejector rod 50 towards the distal end, thereby reducing the probability of the sheath tube 20 being stretched and deformed, preventing some components of the plug head assembly 30 (such as the locking member 34 described below) from being unable to fall off the sheath tube 20 due to the stretched and deformed sheath tube 20 when they need to fall off the sheath tube 20, and further improving the success rate of locking. In other embodiments, the support sleeve 70 can also be disposed inside the sheath tube 20 and outside the cutting tube 40, and the cutting tube 40 axially moves inside the support sleeve 70. In another embodiment, the distal end of the support sleeve 70 can also be connected to the inner wall of the sheath tube 20 near the distal end or the distal end of the sheath tube 20, which can also play a role in reducing the probability of the sheath tube 20 being stretched and deformed.

[0048] In some embodiments, please refer to Figure 4 , Figure 6 , Figure 7 and Figure 8 shown. The driving mechanism 60 includes a screwing member 61 and a moving member 63. The screwing member 61 and the moving member 63 are both movably disposed on the handle 10. The screwing member 61 can move axially along the sheath tube 20 relative to the handle 10 and rotate around the axis of the sheath tube 20. The proximal end of the cutting tube 40 is connected to the screwing member 61. By driving the cutting tube 40 with the screwing member 61, the cutting tube 40 can move axially along the sheath tube 20 and at the same time can rotate relative to the sheath tube 20 around its own axis, so that during the process of the cutting edge 421 contacting the cutting portion 316, the cutting edge 421 can simultaneously apply pressure and cutting force to the suture 200 clamped between the cutting edge 421 and the cutting portion 316, further reducing the difficulty of cutting the suture 200.

[0049] The moving member 63 is axially movable relative to the handle 10 along the sheath tube 20. The proximal end or a position near the proximal end of the ejector rod 50 is connected to the moving member 63, and the ejector rod 50 can be axially moved under the drive of the moving member 63. In this embodiment, the moving member 63 is connected to the proximal end of the screw-in member 61. The screw-in member 61 is provided with a through hole 614 penetrating through its proximal end and distal end. The proximal end of the blade tube 40 communicates with the through hole 614. The proximal end of the ejector rod 50 extends out from the proximal end of the blade tube 40, passes through the through hole 614, and is connected to the moving member 63. By connecting the moving member 63 to the screw-in member 61, it is convenient for the drive mechanism 60 to simultaneously control the axial push of the ejector rod 50 and the axial movement and rotation of the blade tube 40 around its own axis. Therefore, by operating the drive mechanism 60, the bolt head assembly 30 can lock the suture 200 and at the same time control the blade tube 40 to cut the sutured suture 200, reducing the operation difficulty of the locking and cutting operations of the suture 200 in the suture locking system 100, shortening the operation steps, being beneficial to improving the surgical efficiency and shortening the surgical time. In one embodiment, there is a setting method 1: the screw-in member 61 is rotatably connected to the moving member 63, so that the rotation of the screw-in member 61 is not transmitted to the moving member 63, so that the movement of the screw-in member 61 can only drive the moving member 63 to perform axial movement, and then drive the ejector rod 50 to axially push the bolt head assembly 30. In another embodiment, there is a setting method 2: the screw-in member 61 and the moving member 63 can be fixedly connected. At this time, the rotation of the screw-in member 61 can be transmitted to the moving member 63, and the movement of the screw-in member 61 enables the moving member 63 to perform both axial movement and rotation, so as to drive the ejector rod 50 to push the bolt head assembly 30 both axially and rotationally.

[0050] Further, please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 6 As shown, the drive mechanism 60 further includes a fixing member 62. The fixing member 62 is fixedly arranged on the handle 10. The fixing member 62 is provided with a threaded hole 621 extending along the axis of the sheath tube 20. The screw-in member 61 is provided with an external thread and passes through the threaded hole 621 and is in threaded cooperation with the threaded hole 621. A screw-nut mechanism is formed between the fixing member 62 and the screw-in member 61. When the screw-in member 61 rotates relative to the fixing member 62, through the threaded cooperation between the screw-in member 61 and the fixing member 62, the screw-in member 61 can rotate around its own axis and at the same time can move axially, so that the screw-in member 61 can push the blade tube 40 to move axially and at the same time can make the blade tube 40 rotate around its own axis.

[0051] Further, please refer to Figure 3 、 Figure 6 and Figure 7As shown, the driving mechanism 60 further includes a knob 64. The knob 64 is sleeved outside the screw-in member 61 and rotatably arranged on the handle 10. One of the inner circumferential surface of the knob 64 and the outer circumferential surface of the screw-in member 61 is provided with a chute 6111, and the other of the two is provided with a slider 641 that slidably cooperates with the chute 6111. The chute 6111 extends along the axial direction of the sheath tube 20. Understandably, through the cooperation of the chute 6111 and the slider 641, the knob 64 and the screw-in member 61 can move relative to each other along the axial direction of the sheath tube 20. However, the cooperation of the chute 6111 and the slider 641 restricts the relative rotation of the knob 64 and the screw-in member 61 around their own axes. Therefore, when the knob 64 is driven to rotate, through the cooperation of the chute 6111 and the slider 641, the knob 64 can drive the screw-in member 61 to rotate around its own axis relative to the handle 10 and the fixing member 62. Under the action of the screw-thread cooperation between the screw-in member 61 and the fixing member 62, the screw-in member 61 simultaneously moves along the axial direction of the sheath tube 20 relative to the handle 10 and the fixing member 62. In this embodiment, by manipulating the knob 64, the axial pushing of the ejector rod 50 and the axial movement of the blade tube 40 and its rotation around its own axis can be controlled with one key. Therefore, by manipulating the knob 64, the head assembly 30 can lock the suture 200 and at the same time control the blade tube 40 to cut the sutured suture 200, reducing the operation difficulty of the locking and cutting operations of the suture 200 in the suture locking system 100, shortening the operation steps, facilitating the improvement of the surgical efficiency, and shortening the surgical time.

[0052] In some embodiments of the present invention, the head assembly 30 includes a head seat 31 and a locking member 34. The head seat 31 is inserted into the sheath tube 20 and fixedly connected to the sheath tube 20. The head seat 31 has a seat hole 315 that penetrates through its proximal end and distal end. The locking member 34 is detachably connected to the head seat 31 within the seat hole 315, and the locking member 34 is used for locking the suture 200.

[0053] In some embodiments of the present invention, such as Figure 2 、 Figure 4 and Figure 14As shown, the knotting member 34 includes a plug head 32 and a plug pin 33. The plug head 32 is snap-fitted into the seat hole 315. The plug head 32 has a pin hole 321 penetrating through its proximal end and distal end. The pin hole 321 communicates with the seat hole 315 and jointly defines a threading channel 301. The distal end of the support sleeve 70 is connected to the plug seat 31 and communicates with the pin hole 321. When the plug head assembly 30 is in the initial state, the plug pin 33 is disposed within the support sleeve 70 and located between the plug head 32 and the ejector rod 50, and the plug pin 33 can move within the support sleeve 70 under the push of the ejector rod 50. Specifically, when the ejector rod 50 moves distally, the ejector rod 50 pushes the plug pin 33 to move distally within the support sleeve 70. Under the continuous push of the ejector rod 50, the plug pin 33 can be inserted into the pin hole 321, enabling the plug pin 33 to be inserted and connected to the plug head 32, thereby knotting the suture thread passing through the pin hole 321 and causing the plug head assembly 30 to transition to the locked state.

[0054] It should be noted that the maximum outer diameter of the plug pin 33 is greater than the inner diameter of the pin hole 321. When the plug pin 33 is inserted into the pin hole 321, at least part of the plug head 32 deforms so that the plug pin 33 is more firmly inserted and connected to the plug head 32, reducing the probability of the plug pin 33 falling out of the pin hole 321 and improving the firmness of the plug head assembly 30 in locking the suture 200. In another embodiment, at least part of the plug pin 33 undergoes compressive deformation so that the plug pin 33 is more firmly inserted and connected to the plug head 32. In other embodiments, the plug seat 31 may not be provided, and the plug head 32 is directly and tightly fitted and connected to the sheath tube 20. By setting the force between the plug pin 33 and the plug head 32 to be less than the force between the plug head 32 and the sheath tube 20, when the plug pin 33 is inserted into the pin hole 321 of the plug head 32, the plug head 32 will not be pushed out of the sheath tube. For example, this can be achieved by providing friction surfaces with different friction coefficients between the plug pin 33, the plug head 32, and the sheath tube 20.

[0055] In the present embodiment, specifically when the plug head assembly 30 includes the plug head 32 and the plug pin 33, the screwing member 61 is rotatably connected to the moving member 63, which can prevent the rotation of the screwing member 61 from being transmitted to the moving member 63, enabling the moving member 63 to only perform axial movement, thereby driving the ejector rod 50 to axially push the plug pin 33 into the plug head 32. In other embodiments, the screwing member 61 and the moving member 63 may be fixedly connected, so that the rotation of the screwing member 61 can be transmitted to the moving member 63. The movement of the screwing member 61 causes the moving member 63 to perform both axial movement and rotation, thereby driving the ejector rod 50 to push the plug pin 33 into the plug head 32 while performing both axial movement and rotation. In other embodiments, the knotting member 34 can always be in the automatic knotting state. For example, an automatically locking channel is provided inside the knotting member 34. The inner diameter of this channel is smaller than the outer diameter of the suture 200. The inside of the knotting member 34 is made of an elastic material. The suture 200 is inserted into this channel, and the suture 200 and the knotting member 34 can be fixed to each other without external force.

[0056] In some embodiments of the present invention, as Figure 4 and Figure 12 shown, the suture knotting system 100 further includes a connecting sleeve 80. The connecting sleeve 80 is sleeved outside the support sleeve 70 and is located in the seat hole 315. The two sides of the connecting sleeve 80 are fixedly connected to the support sleeve 70 and the plug seat 31 respectively. By providing the connecting sleeve 80, the distal end outside of the support sleeve 70 is sleeved with the connecting sleeve 80, and then the connecting sleeve 80 is connected to the plug seat 31, and the plug seat 31 is connected to the sheath tube 20. Glue can be added between the sheath tube 20, the plug seat 31, the connecting sleeve 80 and the support sleeve 70 to keep the four relatively fixed, improving the connection firmness between the connecting sleeve 80 and the support sleeve 70, the plug seat 31 and the sheath tube 20, so as to utilize the support sleeve 70 to offset at least part of the pushing force of the ejector rod 50 towards the distal end, enabling the support sleeve 70 to better help the sheath tube 20 share the pushing force of the ejector rod 50 towards the distal end, thereby reducing the probability of the sheath tube 20 being stretched and deformed, preventing some components of the plug head assembly 30 (such as the knotting member 34 described below) from failing to fall off the sheath tube 20 due to the stretched and deformed sheath tube 20 when they need to fall off the sheath tube 20, and further improving the success rate of knotting. In addition to being connected by glue between the sheath tube 20, the plug seat 31, the connecting sleeve 80 and the support sleeve 70, they can also be connected by welding or other means.

[0057] Furthermore, as Figure 4 and Figure 5 shown, a circular groove 3154 extending along the circumferential direction of the seat hole 315 is provided in the seat hole 315, and the connecting sleeve 80 is arranged in the circular groove 3154. By providing the circular groove 3154 in the seat hole 315, when the pushing force of the ejector rod 50 is transmitted to the plug seat 31, the proximal end of the connecting sleeve 80 can abut against the side wall of the circular groove 3154, reducing the probability of the connecting sleeve 80 coming out of the seat hole 315 under the pulling force of the support sleeve 70.

[0058] In some embodiments of the present invention, as Figure 10 and Figure 12As shown, a first wire passing hole 71 is provided on the outer peripheral surface of the support sleeve 70, and a second wire passing hole 21 is provided on the outer peripheral surface of the sheath tube 20. The suture 200 can extend into the support sleeve 70 through the wire passing channel 301 and sequentially pass through the first wire passing hole 71 and the second wire passing hole 21 and extend out of the sheath tube 20, so that at least part of the suture 200 is located between the cutting part 316 and the blade part 421. When the blade tube 40 moves distally under the drive of the drive mechanism 60, the suture 200 can be clamped between the blade part 421 and the cutting part 316, and the suture 200 can be cut off. In an embodiment, only the first wire passing hole 71 on the support sleeve 70 can be provided. For example, after the suture 200 is inserted into the first wire passing hole 71, it extends along the inner cavity of the sheath tube 20 to the proximal end of the sheath tube 20. At this time, at least part of the suture 200 can be located between the cutting part 316 and the blade part 421. When the blade tube 40 moves distally under the drive of the drive mechanism 60, the suture 200 can be clamped between the blade part 421 and the cutting part 316, and the suture 200 can be cut off. In an embodiment, only the second wire passing hole 21 on the outer peripheral surface of the sheath tube 20 can be provided. When the suture 200 enters the area between the cutting part 316 and the blade part 421 through the guide hole 321, it does not pass through the support sleeve 70, but bypasses from the distal end of the support sleeve 70. At this time, the support sleeve 70 can be sleeved outside the blade tube 40.

[0059] Please refer to Figure 2 , Figure 3 , Figure 6 and Figure 8 As shown, since the ejector rod 50, the support sleeve 70, the blade tube 40 and the sheath tube 20 are sleeved in sequence from the inside to the outside, and the sheath tube 20 and the support sleeve 70 are both fixedly connected to the handle 10, while the proximal ends of the ejector rod 50 and the blade tube 40 are connected to the drive mechanism 60 and can respectively move axially relative to the sheath tube 20 and the support sleeve 70 along the sheath tube 20. To achieve the above functions and prevent interference between the ejector rod 50, the support sleeve 70, the blade tube 40 and the sheath tube 20, in some embodiments of the present invention, the following solutions are given:

[0060] Furthermore, referring to Figure 3 , the handle 10 has a receiving cavity 101. The proximal end of the sheath tube 20 is connected to the distal end of the handle 10 and is communicated with the receiving cavity 101. In the direction from the distal end to the proximal end, referring to Figure 8 and Figure 9, the inner wall of the accommodating cavity 101 is successively provided with a second fixing groove 105 and a supporting portion 106. Both the second fixing groove 105 and the supporting portion 106 are located within the accommodating cavity 101. The fixing member 62 is fixedly installed within the second fixing groove 105. The proximal end of the cutting tube 40 extends out from the proximal end of the sheath tube 20 and extends into the accommodating cavity 101, and is inserted into and fixedly connected to the through hole 614 of the rotating member 61. The proximal end of the rotating member 61 is rotatably connected to the moving member 63. One of the moving member 63 and the handle 10 is provided with a first sliding structure 102 extending along the axial direction of the sheath tube 20, and the other of them is provided with a second sliding structure 6301 slidably connected to the first sliding structure 102, so that the rotating member 61 can drive the moving member 63 to move along the axial direction of the supporting sleeve 70, and the moving member 63 will not rotate together with the rotating member 61 under the limitation of the first sliding structure 102 and the second sliding structure 6301. The moving member 63 is provided with an avoidance groove 6302. The proximal end of the through hole 614 communicates with the avoidance groove 6302. The supporting portion 106 protrudes radially along the sheath tube 20 and extends into the avoidance groove 6302. The proximal end of the supporting sleeve 70 extends into the avoidance groove 6302 from the proximal end of the through hole 614 and is connected to the supporting portion 106. The proximal end of the ejector rod 50 extends out from the proximal end of the supporting sleeve 70 and is connected to the moving member 63.

[0061] In an embodiment of the present invention, the sheath tube 20 and the cutting tube 40 are coaxially arranged.

[0062] The technical solution of the present invention will be further described in detail below in conjunction with specific embodiments.

[0063] Embodiment 1

[0064] In this embodiment, in combination with Figure 1 , Figure 2 , Figure 4 and Figure 6 shown, the suture locking system 100 includes: a handle 10, a sheath tube 20, a plug head assembly 30, a cutting tube 40, an ejector rod 50, a supporting sleeve 70, a connecting sleeve 80, and a driving mechanism 60.

[0065] Specifically, as Figure 2 and Figure 3As shown, the handle 10 includes an upper housing 11, a lower housing 12, an end cap 13 and a stress-relieving sleeve 14. The upper housing 11 and the lower housing 12 are arranged in an opposing manner, and an accommodation cavity 101 is defined between the upper housing 11 and the lower housing 12. The end cap 13 is in the shape of a conical cover. The stress-relieving sleeve 14 includes a connected fixing portion 141 and a tubular portion 142. The tubular portion 142 is a tubular structure extending axially. The fixing portion 141 is provided at the proximal end of the tubular portion 142. At the distal ends of the upper housing 11 and the lower housing 12, there is a first fixing groove 103 for installing the fixing portion 141 and an end cap mounting portion 104 located on one side of the distal end of the first fixing groove 103. The end cap 13 is installed on the end cap mounting portion 104, the fixing portion 141 is installed in the first fixing groove 103, and the distal end of the tubular portion 142 sequentially passes through the end cap mounting portion 104 and the end cap 13 and extends out from the distal end of the end cap 13. The proximal end of the sheath tube 20 is inserted into the tubular portion 142 of the stress-relieving sleeve 14 and fixedly connected to the tubular portion 142, and the proximal end of the sheath tube 20 communicates with the accommodation cavity 101.

[0066] As Figure 2 and Figure 4 shown, the bolt head assembly 30 includes a bolt seat 31, a bolt head 32 and a bolt pin 33. The bolt seat 31 is inserted through the sheath tube 20 and fixedly connected to the sheath tube 20.

[0067] Specifically, as Figure 4 and Figure 5 shown, along the axial direction of the sheath tube 20, the outer peripheral surface of the bolt seat 31 is arranged in a stepped shape. The bolt seat 31 includes a first stepped section 311, a second stepped section 312 and a third stepped section 313 connected in sequence. Among them, the first stepped section 311 is located at the distal end, the third stepped section 313 is located at the proximal end, the outer diameter of the first stepped section 311 is greater than the outer diameter of the third stepped section 313, and the outer diameter of the third stepped section 313 is greater than the outer diameter of the second stepped section 312. The sheath tube 20 is sleeved outside the second stepped section 312 and the third stepped section 313. A stepped surface 314 facing the proximal end is formed between the first stepped section 311 and the second stepped section. The distal end of the sheath tube 20 abuts against the stepped surface 314, and a gap is formed between the inner wall surface of the sheath tube 20 and the outer peripheral surface of the second stepped section 312. This gap is used to accommodate glue, so that the sheath tube 20 and the bolt seat 31 have better connection strength after the glue solidifies.

[0068] The plug base 31 has a seat hole 315 penetrating through its proximal end and distal end. A clamping groove 3153 is also provided in the seat hole 315. The clamping groove 3153 is annular and extends along the circumferential direction of the seat hole 315. An annular protrusion 322 engaged with the clamping groove 3153 is provided on the outer peripheral surface of the proximal end of the plug head 32. The plug head 32 is clamped and connected to the plug base 31 through the cooperation between the annular protrusion 322 and the clamping groove 3153. When the plug head 32 is subjected to a thrust force towards the distal end and the thrust force is greater than the clamping force between the annular protrusion 322 and the clamping groove 3153, the plug head 32 can be detached from the plug base 31. To enable the smooth detachment of the plug head 32, the distal end of the annular protrusion 322 and the distal side wall of the clamping groove 3153 are both provided as inclined surfaces.

[0069] Furthermore, a stop portion 323 is convexly provided on the outer peripheral surface of the distal end of the plug head 32, and a stop groove 317 is provided on the distal end face of the plug base 31. The proximal end face of the stop portion 323 is in stop cooperation with the side wall of the proximal end of the stop groove 317 to prevent the plug head 32 from being inserted too deeply into the plug base 31 when being assembled into the plug base 31.

[0070] The plug head 32 has a pin hole 321 penetrating through its proximal end and distal end. The pin hole 321 is communicated with the seat hole 315 and jointly defines a threading channel 301. An annular groove 3154 extending along the circumferential direction of the seat hole 315 is provided in the seat hole 315. The annular groove 3154 is located on one side of the proximal end of the clamping groove 3153. The connecting sleeve 80 is arranged in the annular groove 3154 and sleeved outside the support sleeve 70. The sheath tube 20, the plug base 31, the connecting sleeve 80, and the support sleeve 70 are adhesively fixed to each other. The distal end of the support sleeve 70 abuts against the proximal end of the plug head 32, and the distal end of the support sleeve 70 is communicated with the pin hole 321. The ejector rod 50 is arranged in the support sleeve 70 and can axially move relative to the support sleeve 70. The plug pin 33 is arranged in the support sleeve 70 and located between the distal ends of the plug head 32 and the ejector rod 50. The plug pin 33 can move in the support sleeve 70 under the push of the ejector rod 50. When the ejector rod 50 moves towards the distal end, the ejector rod 50 pushes the plug pin 33 to move towards the distal end in the support sleeve 70. Under the continuous push of the ejector rod 50, the plug pin 33 can be inserted into the pin hole 321 to enable the plug pin 33 to be inserted and connected with the plug head 32, thereby locking the suture thread passing through the pin hole 321.

[0071] In this embodiment, as Figure 4 and Figure 5As shown, the proximal end of the pin hole 321 has a flared structure in the shape of a trumpet, which facilitates providing guidance when the bolt pin 33 is inserted into the pin hole 321. The bolt pin 33 includes a cylindrical main body portion 331, a limiting portion 332 provided at the proximal end of the main body portion 331, and a protruding portion 333 annularly provided on the outer peripheral surface of the main body portion 331. The distal end of the main body portion 331 is provided with a smoothly transitioning arc surface, which has a guiding effect during the process of inserting the bolt pin 33 into the pin hole 321. The distal end face of the protruding portion 333 is provided as an inclined surface, and the maximum outer diameter of the protruding portion 333 is greater than the inner diameter of the pin hole 321. When the main body portion 331 of the bolt pin 33 is inserted into the pin hole 321, the protruding portion 333 elastically deforms and is radially compressed. The elastic force generated by the deformation of the protruding portion 333 firmly fixes the bolt pin 33 in the pin hole 321 and locks the suture thread passing through the pin hole 321. The outer diameter of the limiting portion 332 is greater than the outer diameter of the pin hole 321, so that the distal end face of the limiting portion 332 abuts against the proximal end face of the bolt head 32 to limit the depth dimension of the bolt pin 33 inserted into the bolt head 32. When the ejector rod 50 continuously moves distally, the bolt head 32 is pushed to fall off from the seat hole 315 through the limiting portion 332. In another embodiment, the part that is prone to deformation between the bolt pin 33 and the bolt head 32 is the bolt head 32. The outer diameter of the bolt pin 33 is greater than the inner diameter of the pin hole 321 of the bolt head 32. When the bolt pin 33 is inserted into the bolt head 32, the bolt head 32 can expand and deform, and the inner diameter of the pin hole 321 can be enlarged by the bolt pin 33, so that the bolt pin 33 can be firmly fixed in the pin hole 321.

[0072] Further, the cutting tube 40 is sleeved outside the support sleeve 70 and is located inside the sheath tube 20. The cutting tube 40 can move relative to the sheath tube 20 along the axial direction of the sheath tube 20. A cutting edge portion 421 is provided at the distal end of the cutting tube 40, and a cutting portion 316 is provided at the proximal end of the bolt seat 31. The cutting portion 316 is specifically a cutting surface formed on the proximal end face of the bolt seat 31. Along the axial direction of the sheath tube 20, the cutting edge portion 421 and the cutting portion 316 are oppositely arranged. When the cutting tube 40 moves axially, the cutting edge portion 421 and the cutting portion 316 can be transformed between a separated state and a state of pressing contact.

[0073] As Figure 12 shown, a first wire passing hole 71 is provided on the outer peripheral surface of the support sleeve 70, and a second wire passing hole 21 is provided on the outer peripheral surface of the sheath tube 20. The suture thread 200 can extend into the support sleeve 70 through the wire passing channel 301 and sequentially pass through the first wire passing hole 71 and the second wire passing hole 21 and extend outside the sheath tube 20, so that at least part of the suture thread 200 is located between the cutting portion 316 and the cutting edge portion 421. When the cutting tube 40 moves distally, the suture thread 200 can be clamped between the cutting edge portion 421 and the cutting portion 316 and the suture thread 200 can be cut off.

[0074] In this embodiment, please combine Figure 2 、 Figure 6 、 Figure 7 and Figure 8As shown, the driving mechanism 60 includes a screw-in member 61, a fixing member 62, a moving member 63, and a knob 64. In the direction from the distal end to the proximal end, the inner wall of the accommodating cavity 101 is successively provided with a second fixing groove 105 and a supporting portion 106 at intervals. The fixing member 62 is fixedly installed in the second fixing groove 105. The fixing member 62 is provided with a threaded hole 621 that extends along the axial direction of the sheath tube 20 and penetrates through the proximal end and the distal end of the fixing member 62. The screw-in member 61 is integrally in a long strip shape extending along the axial direction. In the direction from the proximal end to the distal end, the screw-in member 61 includes a sliding connection portion 611, a threaded engagement portion 612, and a connecting rod portion 613 that are successively connected. The outer peripheral surface of the threaded engagement portion 612 is provided with an external thread that is threadedly engaged with the threaded hole 621. The threaded engagement portion 612 of the screw-in member 61 penetrates through the threaded hole 621 of the fixing member 62 and is threadedly engaged with the threaded hole 621. The sliding connection portion 611 is located on one side of the distal end of the fixing member 62, and the connecting rod portion 613 is located on one side of the proximal end of the fixing member 62. The outer peripheral surface of the sliding connection portion 611 is provided with a chute 6112 that extends along the axial direction of the sheath tube 20. The knob 64 is tubular. The knob 64 is sleeved outside the sliding connection portion 611. The inner wall surface of the knob 64 is provided with a slider 641 that extends along the axial direction of the sheath tube 20. The slider 641 is slidably disposed in the chute 6111. By rotatably disposing the knob 64 on the handle 10, when the knob 64 is driven to rotate, through the cooperation of the chute 6111 and the slider 641, the knob 64 can drive the screw-in member 61 to rotate around its own axis relative to the handle 10 and the fixing member 62. Under the action of the threaded engagement between the screw-in member 61 and the fixing member 62, the screw-in member 61 simultaneously moves along the axial direction of the sheath tube 20 relative to the handle 10 and the fixing member 62.

[0075] Further, please refer to Figure 3 , Figure 6 , Figure 7 and Figure 11 As shown, the screw-in member 61 is provided with a through hole 614 that penetrates through its proximal end and distal end. A plurality of first pin holes 6112 are further provided in the sliding connection portion 611 and are arranged radially with respect to the sheath tube 20. The first pin holes 6112 communicate with the through hole 614. A first clamping groove 401 is provided on the outer peripheral surface of the cutting tube 40. The first clamping groove 401 is provided near the proximal end of the cutting tube 40. The proximal end of the cutting tube 40 is inserted into the through hole 614, and a first pin 1001 is inserted into the first pin hole 6112 and the part of the pin extending into the through hole 614 is clamped into the first clamping groove 401, so as to fixedly connect the proximal end of the cutting tube 40 with the screw-in member 61.

[0076] In some embodiments, two of the plurality of first clamping slots 401 form a group, and multiple groups of first clamping slots 401 are sequentially arranged at intervals along the axial direction of the cutting tube 40. The two first clamping slots 401 in each group are respectively located on the left and right sides of the axis of the cutting tube 40. Two of the plurality of first pin holes 6112 form a group, and multiple groups of first pin holes 6112 are sequentially arranged at intervals along the axial direction of the cutting tube 40. The two first pin holes 6112 in each group are respectively located on the left and right sides of the axis of the through hole 614. The two first pin holes 6112 in each group can be respectively aligned with the two first clamping slots 401 in each group, so that the two first pins 1001 inserted into the first pin holes 6112 can be respectively clamped into the two first clamping slots 401. It should be noted that by arranging multiple groups of first clamping slots 401 and multiple groups of first pin holes 6112 along the axial direction, the connection firmness between the cutting tube 40 and the screw-in member 61 can be improved, and the relative position of the cutting tube 40 and the bolt head assembly 30 in the axial direction can be adjusted by adjusting the alignment of different groups of first clamping slots 401 and first pin holes 6112 according to requirements, thereby adjusting the relative position between the distal end of the cutting tube 40 and the distal end of the ejector rod 50, so as to ensure that the cutting edge 421 at the distal end of the cutting tube 40 can contact the cutting part 316 and cut the suture 200 after the bolt 33 is completely inserted into the bolt head 32. In other embodiments, there may be one first clamping slot 401.

[0077] Further, as Figure 6 and Figure 7 shown, the moving member 63 includes a rotation connection part 631 and a fixed connection part 632 arranged at intervals along the axial direction of the sheath tube 20. The moving member 63 further includes a first side wall 633 and a second side wall 634 connecting the rotation connection part 631 and the fixed connection part 632. The first side wall 633 and the second side wall 634 are arranged at intervals along the radial direction of the sheath tube 20. An avoidance groove 6302 is enclosed between the rotation connection part 631, the first side wall 633, the fixed connection part 632 and the second side wall 634. The rotation connection part 631 is provided with a rotation limit hole 6311 penetrating through its proximal end and distal end. The rotation connection part 631 is further provided with a second pin hole 6312 extending along the radial direction of the sheath tube 20, and the second pin hole 6312 communicates with the rotation limit hole 6311.

[0078] Please refer to Figure 3 、 Figure 6 and Figure 7As shown, at the proximal end of the connecting rod portion 613 of the precession member 61, a plurality of rotation limiting portions 6131 are provided at intervals along the axial direction of the sheath tube 20. The rotation limiting portions 6131 are annular and protrude from the outer peripheral surface of the connecting rod portion 613. There is a limiting gap 6132 between two adjacent rotation limiting portions 6131. The distal end of the connecting rod portion 613 is rotatably inserted into the rotation limiting hole 6311. The second pin shaft hole 6312 is embedded with the second pin shaft 1002, and the portion of the second pin shaft 1002 located in the rotation limiting hole 6311 is disposed in the limiting gap 6132, such that along the axial direction of the sheath tube 20, the second pin shaft 1002 is respectively in stop cooperation with two adjacent rotation limiting portions 6131, so that the precession member 61 can rotate relative to the moving member 63 around the axis of the cutting edge tube 40, but the relative movement of the precession member 61 and the moving member 63 along the axial direction of the sheath tube 20 is restricted by the stop cooperation between the second pin shaft 1002 and the rotation limiting portion 6131.

[0079] Please refer to Figure 8 、 Figure 9 and Figure 10 As shown, the support portion 106 includes a plurality of side plate portions arranged radially along the sheath tube 20 and in a plate shape, and a slot 1061 with one side open is formed between the plurality of side plate portions. The outer peripheral surface of the support sleeve 70 is provided with a second clamping groove 72. The proximal end of the support sleeve 70 extends out from the proximal end of the cutting edge tube 40, passes through the through hole 614, and extends into the avoidance groove 6302. The suture locking system 100 further includes a pipe clamp 1003. The pipe clamp 1003 is provided with a third clamping groove 10031 with one end open. The pipe clamp 1003 is inserted into the slot 1061, and the pipe clamp 1003 is clamped into the second clamping groove 72 of the support sleeve 70, so that the pipe clamp 1003 is respectively in stop cooperation with the proximal side wall and the distal side wall of the second clamping groove 72, thereby restricting the relative movement of the support sleeve 70 along the axial direction of the sheath tube 20 relative to the handle 10.

[0080] In some embodiments, as Figure 10 shown, the outer peripheral surface of the support sleeve 70 is provided with a plurality of second clamping grooves 72. Two of the plurality of second clamping grooves 72 form a group, and multiple groups of second clamping grooves 72 are arranged at intervals along the axial direction of the support sleeve 70. The two second clamping grooves 72 in each group are respectively located on the left and right sides of the axis of the support sleeve 70. The support portion 106 has a plurality of slots 1061. Each slot 1061 is provided with a pipe clamp 1003 and corresponds to a second clamping groove 72, so as to improve the connection strength between the support sleeve 70 and the support portion 106. In other embodiments, the number of the second clamping grooves 72 can be one.

[0081] Further, please refer to Figure 3 、 Figure 6 and Figure 8As shown, the fixed connection part 632 is provided with a first fastening hole 6321 extending axially and a second fastening hole 6322 extending radially along the sheath tube 20. The second fastening hole 6322 is configured as a threaded hole. The second fastening hole 6322 communicates with the first fastening hole 6321. A fastening screw 1004 is provided in the second fastening hole 6322. The proximal end of the ejector rod 50 passes through the first fastening hole 6321, and the ejector rod 50 is locked and fixed to the fixed connection part 632 by the fastening screw 1004 passing through the second fastening hole 6322.

[0082] Further, as Figure 8 shown, one of the moving part 63 and the handle 10 is provided with a first sliding structure 102 extending axially along the sheath tube 20, and the other of them is provided with a second sliding structure 6301 slidably connected to the first sliding structure 102, so that the screwing member 61 can drive the moving part 63 to move axially along the support sleeve 70, and the moving part 63 will not rotate together with the screwing member 61 under the limitation of the first sliding structure 102 and the second sliding structure 6301.

[0083] Understandably, the first sliding structure 102 and the second sliding structure 6301 can be set in various structural forms of sliding fit. For example, the first sliding structure 102 is a chute, and the second sliding structure 6301 is a slider slidably matched with the chute. Another example is that the first sliding structure 102 is set as a sliding rod, and the second sliding structure 6301 is set as a sliding hole slidably matched with the sliding rod.

[0084] In this embodiment, by operating the control knob 64, the axial pushing of the ejector rod 50 and the axial movement of the cutting tube 40 and the rotation around its own axis can be controlled with one key. Therefore, by operating the control knob 64, the bolt head assembly 30 can lock the suture 200 and at the same time control the cutting tube 40 to cut the sutured suture 200, reducing the operation difficulty of the locking and cutting operations of the suture 200 in the suture locking system 100, shortening the operation steps, which is beneficial to improving the surgical efficiency and shortening the surgical time. It should also be noted that by adding the support sleeve 70, the support sleeve 70 is used to offset at least part of the pushing force of the ejector rod 50 towards the distal end, so that the support sleeve 70 can better help the sheath tube 20 share the pushing force of the ejector rod 50 towards the distal end, thereby reducing the probability of the sheath tube 20 being stretched and deformed.

[0085] In some embodiments of the present invention, please refer to Figure 1 、 Figure 2 、 Figure 12 and Figure 14As shown, the suture locking system 100 further includes a lead wire device 90. The lead wire device 90 includes a lead wire handle 91 and a lead wire 92 connected to the lead wire handle 91. The distal end of the lead wire 92 can sequentially extend into the support sleeve 70 through the second wire passing hole 21 and the first wire passing hole 71, and then pass through the seat hole 315 of the plug seat 31 and the pin hole 321 of the plug head 32 and exit from the distal end of the plug head 32. The lead wire 92 is formed by folding a silk thread into an annular sleeve structure. The lead wire handle 91 is generally in the shape of a flat plate. Both side plates of the lead wire handle 91 are concave and provided with a plurality of elongated protrusions extending along the plate surface to increase friction and facilitate gripping. One end of the lead wire handle 91 is provided with two cantilever portions 911 arranged at intervals. The two cantilever portions 911 are used to clamp the lead wire handle 91 outside the sheath tube 20 and can slide axially relative to the sheath tube 20 along the sheath tube 20.

[0086] In this embodiment, the operation of the suture locking process of the suture locking system 100 is as follows:

[0087] Taking the foramen ovale suture operation as an example, after the foramen ovale suture operation is completed, the end of the suture 200 is exposed outside the body. First, use the lead wire 92 to capture the exposed portion of the suture 200 exposed outside the body, and control the lead wire handle 91 to slide axially along the sheath tube 20 towards the proximal side, so that the lead wire 92 pulls the exposed portion of the suture 200 to sequentially pass through the pin hole 321 and the seat hole 315 and enter the support sleeve 70, and then pass through the first wire passing hole 71 and the second wire passing hole 21 and exit outside the sheath tube 20; then, by manipulating the suture locking system 100, under the guidance of the suture 200, the distal end of the sheath tube 20 is pushed to the suture position, the drive knob 64 is rotated, and the drive knob 64 drives the ejector rod 50 and the blade tube 40 to be pushed towards the distal end at the same time. Under the continuous push of the ejector rod 50, the plug pin 33 can be inserted into the pin hole 321, so that the plug pin 33 and the plug head 32 are inserted and connected as a whole, and then the suture passing through the pin hole 321 is locked. The blade portion 421 of the blade tube 40 moves towards the distal end to abut against the cutting portion 316 of the plug seat 31, and under the drive of the drive knob 64, while the blade tube 40 moves towards the distal end, it also rotates around its own axis, so that the blade portion 421 applies pressure and cutting force to the suture 200 clamped between the blade portion 421 and the cutting portion 316, and cuts off the suture 200; finally, continue to rotate the drive knob 64, and the ejector rod 50 continuously moves towards the distal end until the plug pin 33 and the plug head 32 are pushed out of the seat hole 315 of the plug seat 31, completing the locking of the suture 200, and withdrawing the sheath tube 20 together with the plug seat 31 and the like from the body, completing the suture locking operation of the suture 200.

[0088] In other embodiments of the present invention, such as Figure 13As shown, the cutting part 316 is provided on the inner wall surface of the wire threading channel 301, the cutting edge part 421 is formed on the outer peripheral surface of the cutting edge tube 40, and the outer peripheral surface of the cutting edge part 421 is in contact and cooperation with the inner ring surface of the cutting part 316. In this embodiment, the seat hole 315 of the plug seat 31 is set to be stepped. The seat hole 315 includes a first stepped section 3151 and a second stepped section 3152 that are communicated with each other. The first stepped section 3151 is located at the proximal end relative to the second stepped section 3152, and the inner diameter of the first stepped section 3151 is larger than the inner diameter of the second stepped section 3152. The inner wall of the first stepped section 3151 forms the cutting part 316. The distal end of the cutting edge tube 40 can be inserted into the seat hole 315 of the first stepped section 3151. The cutting edge part 421 is formed on the outer peripheral surface of the cutting edge tube 40 and can be in contact and cooperation with the inner wall of the first stepped section 3151. When controlling the axial movement and rotation of the cutting edge tube 40 around its own axis by operating the knob 64, the cutting edge part 421 continuously cuts the suture 200 located between the cutting edge part 421 and the cutting part 316 during the rotation process, thereby cutting off the suture 200.

[0089] Embodiment 2

[0090] The differences between Embodiment 2 and Embodiment 1 will be described below. For the same or similar parts between Embodiment 2 and Embodiment 1, they will not be repeated here.

[0091] In this embodiment, as Figure 11 and Figure 12 shown, the cutting edge tube 40 includes a main body section 41 and a cutting section 42 connected to the distal end of the main body section 41. The cutting edge part 421 is provided at the distal end of the cutting section 42, and the bending resistance of the cutting section 42 is higher than that of the main body section 41.

[0092] Specifically, the main body section 41 has higher bending performance relative to the cutting section 42, enabling the main body section 41 to conform to the curved structure of the blood vessels inside the human body, which is beneficial for the main body section 41 to more smoothly follow the sheath tube 20 into the target position inside the human body. The cutting section 42 has better hardness, rigidity and anti-bending property relative to the main body section 41. During the process of pushing the cutting edge part 421 at the distal end of the cutting edge tube 40 and performing the cutting action, the cutting section 42 can apply sufficient pressure and cutting force to the suture 200 between the cutting edge part 421 and the cutting part 316 to ensure that the cutting edge part 421 cuts off the suture 200.

[0093] In some embodiments, the materials of the cutting section 42 and the main body section 41 are the same, but the wall thickness of the main body section 41 is smaller than the wall thickness of the cutting section 42, so that the bending performance of the main body section 41 is higher than that of the cutting section 42, that is, the main body section 41 has better flexibility relative to the cutting section 42.

[0094] In some embodiments, as Figure 12As shown, the cutting section 42 and the main body section 41 are made of different materials, and the hardness and rigidity of the material of the cutting section 42 are higher than those of the main body section 41. For example, the cutting section 42 can be made of steel, etc. The supporting performance of the cutting section 42 is higher than that of the main body section 41. At least a part of the cutting section 42 is sleeved outside the main body section 41, and the cutting section 42 and the main body section 41 are connected into an integral structure by means of laser welding, soldering or adhesive bonding, etc.

[0095] As described above, only the preferred specific embodiments of the present invention are given, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A suture knotting system, characterized in that, The suture locking system includes a sheath, a plug head assembly arranged at the distal end of the sheath, a support sleeve arranged in the sheath and a push rod movably arranged in the support sleeve, the plug head assembly is used to lock the suture, the distal end of the support sleeve is connected to the plug head assembly, or the distal end of the support sleeve is connected to the inner wall of the sheath near the distal end or the distal end of the sheath, and the proximal end of the support sleeve is fixed; during the movement of the push rod toward the distal end, the distal end of the push rod can push the plug head assembly to push at least part of the plug head assembly out of the sheath.

2. The suture locking system according to claim 1, wherein The bolt head assembly includes a bolt seat and a locking piece. The bolt seat is inserted into the sheath tube and fixedly connected to the sheath tube. The bolt seat has a seat hole that passes through its proximal end and distal end. The locking piece is detachably connected to the bolt seat in the seat hole. The locking piece is used to lock the suture.

3. The suture locking system according to claim 2, wherein The distal end of the support sleeve is fixedly connected to the bolt seat.

4. The suture locking system according to claim 3, wherein The suture locking system also includes a connecting sleeve, which is sleeved outside the supporting sleeve and located in the seat hole, and two sides of the connecting sleeve are respectively fixedly connected to the supporting sleeve and the bolt seat.

5. The suture locking system according to claim 4, wherein, An annular groove extending along the circumference of the seat hole is provided in the seat hole, and the connecting sleeve is arranged in the annular groove.

6. The suture locking system according to claim 5, wherein The suture locking system further comprises a driving mechanism, wherein the driving mechanism comprises a moving member, and the moving member can move along the axial direction of the sheath tube, and the proximal end of the push rod or a position close to the proximal end is connected to the moving member.

7. The suture locking system according to claim 6, wherein The suture locking system also includes a handle, the movable member is arranged in the handle, one of the movable member and the handle is provided with a first sliding structure extending along the axial direction of the sheath tube, and the other of the two is provided with a second sliding structure slidably connected to the first sliding structure.

8. The suture locking knot system according to any one of claims 2 to 7, characterized in that: The locking member includes a bolt head and a bolt pin, wherein the bolt head is detachably arranged in the seat hole, and the bolt head has a pin hole penetrating the proximal end and the distal end thereof, and the suture thread can extend into the sheath tube through the pin hole; The locking member has an initial state and a locking state. In the initial state, the bolt pin is arranged in the support sleeve and is located between the bolt head and the push rod, and the bolt pin can move in the support sleeve under the push of the push rod; in the locking state, the bolt pin is inserted into the pin hole.

9. The suture locking system according to claim 2, wherein The suture locking system further comprises a blade tube, the blade tube is movably arranged in the sheath tube, the bolt seat is provided with a cutting portion, and the distal end of the blade tube is provided with a blade portion arranged opposite to the cutting portion; The outer circumference of the support sleeve is provided with a first wire passing hole, and the outer circumference of the sheath tube is provided with a second wire passing hole. The suture thread can extend into the support sleeve through the seat hole, and pass through the first wire passing hole and the second wire passing hole in turn to the outside of the sheath tube, and at least part of the suture thread is between the cutting part and the blade part.

10. The suture knotting system according to claim 9, wherein The cutting tube includes a main body section and a cutting section connected to the distal end of the main body section. The cutting edge is provided at the distal end of the cutting section, and the bending resistance of the cutting section is higher than that of the main body section.

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