Suture knot tying system

Abstract

Disclosed in the present invention is a suture knot tying system, which comprises a driving mechanism, a sheath, a screw head assembly provided at the distal end of the sheath, a blade cannula provided inside the sheath and a cutting portion provided inside the sheath. The screw head assembly comprises a suture channel communicated with the sheath; the distal end of the blade cannula is provided with a blade portion in contact fit with the cutting portion; and a suture can pass through the suture channel and extend into the sheath and is located between the cutting portion and the blade portion. The proximal end of the blade cannula is connected to the driving mechanism. During the process of operating the driving mechanism, the driving mechanism can simultaneously drive the blade cannula to move in the axial direction of the sheath relative to the sheath and drive the blade cannula to rotate around its own axis. The suture knot tying system disclosed by the present invention requires a low pressure for cutting sutures, so as to reduce a pushing force that the blade cannula applies on the screw head assembly and a pressure between the blade portion and the cutting portion, thereby reducing the probability of damage to the blade cannula or the sheath.

Description

Suture locking system Technical Field

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

[0002] Generally, during surgical operations, sutures need to be knotted and fixed. Since surgical operations are usually performed under the doctor's direct vision, the doctor usually ties the knot manually. However, minimally invasive surgery and interventional surgery are becoming more and more widely used due to their advantages of less trauma and faster recovery. For example, in transcatheter interventional surgery, a catheter or other instrument needs to be inserted into the patient's body to reach the predetermined position and perform suture treatment. After the suturing operation is completed, a knotting instrument needs to be used to capture the suture and insert it to the suture position. The knotting instrument is then used to remotely operate the suture outside the patient's body to complete the knotting of the suture in the patient's body, and the knotted suture is cut off. The cut suture is then withdrawn from the patient's body along with the knotting instrument to complete the operation.

[0003] To shear sutures, existing devices typically use a manually driven axially movable blade that squeezes the distal end of the blade against the flat surface on the proximal side of the chuck, thereby severing the suture. However, severing sutures by squeezing is difficult, as the required squeezing force is difficult to control. If the squeezing force is insufficient, the suture cannot be completely severed. If the squeezing force is too great, the blade may break, producing debris, or the sheath may be stretched and deformed, endangering the patient's health. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that it is difficult to cut the suture thread only by the squeezing force between the blade and the chuck, and there are safety hazards. In view of the defects of the existing technology, a suture thread locking system is provided.

[0005] The present invention solves the technical problem by the following technical solutions:

[0006] A suture locking system comprises a driving mechanism, a sheath, a plug head assembly arranged at the distal end of the sheath, a blade tube arranged in the sheath and a cutting part arranged in the sheath, the plug head assembly comprises a threading channel connected to the sheath, the distal end of the blade tube is provided with a blade part contacting and cooperating with the cutting part, the suture can be extended into the sheath through the threading channel and between the cutting part and the blade part, the proximal end of the blade tube is connected to the driving mechanism, and during the operation of the driving mechanism, the driving mechanism can simultaneously drive the blade tube to move axially relative to the sheath and rotate around its own axis.

[0007] According to the above-mentioned suture thread locking system, the driving mechanism simultaneously drives the blade tube to move axially relative to the sheath tube along the sheath tube and to rotate around its own axis, so that the suture thread can be clamped between the blade portion and the cutting portion of the blade tube, and the blade portion can cut the suture thread by rotating relative to the cutting portion, so that the blade portion simultaneously applies pressure and cutting force to the suture thread, thereby improving the cutting effect of the blade portion on the suture thread and reducing the difficulty of cutting the suture thread. In addition, compared with the method of only squeezing and breaking the dividing line, the method of cutting the suture thread by rotating the blade portion relative to the cutting portion requires less pressure to cut the suture thread, which can reduce the pushing force applied by the blade tube on the plug head assembly and the pressure between the blade portion and the cutting portion, thereby reducing the probability of damage to the blade tube or the sheath tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0009] FIG1 is a schematic structural diagram of an exemplary suture locking system according to the present invention;

[0010] FIG2 is an exploded schematic diagram of parts of an exemplary suture locking system according to the present invention;

[0011] FIG3 is a partial cross-sectional view of an exemplary suture locking system of the present invention;

[0012] FIG4 is a partial cross-sectional view of a plug head assembly, a sheath tube, a support sleeve, a blade tube, and a mandrel of an exemplary suture locking system of the present invention;

[0013] FIG5 is a cross-sectional view of a base and a head of an exemplary suture locking system according to the present invention;

[0014] FIG6 is a schematic diagram of the assembly structure of a drive mechanism of an exemplary suture locking system of the present invention;

[0015] FIG7 is an exploded schematic diagram of parts of a drive mechanism of an exemplary suture locking system of the present invention;

[0016] FIG8 is a schematic structural diagram of an exemplary suture locking system according to the present invention;

[0017] FIG9 is a partial enlarged schematic diagram of portion A in FIG8 ;

[0018] FIG10 is a schematic structural diagram of a support sleeve and a pipe clamp in an exemplary suture locking system of the present invention;

[0019] FIG11 is a schematic structural diagram of a blade tube in an exemplary suture locking system of the present invention;

[0020] FIG12 is a partial cross-sectional view of a plug head assembly, a sheath tube, a support sleeve, a blade tube, and a push rod of an exemplary suture locking system of the present invention;

[0021] FIG13 is a cross-sectional view of a base and a head of an exemplary suture locking system according to the present invention;

[0022] FIG. 14 is a schematic diagram of an exemplary suture locking system according to the present invention, showing a bolt head, a bolt pin, and a suture after the suture is locked and cut.

[0023] The reference numerals in the accompanying drawings represent the following: 100, suture locking system; 10, handle; 11, upper housing; 12, lower housing; 13, end cap; 14, strain relief sleeve; 141, fixing portion; 142, tubular portion; 101, accommodating cavity; 102, first sliding structure; 103, first fixing groove; 104, end cap mounting portion; 105, second fixing groove; 106, support portion; 1061, slot; 20, sheath; 21, second thread hole; 30, bolt head assembly; 31, bolt seat; 311, first step section; 312, second step section; 313, third step section; 314, step surface; 315, seat hole; 3151, first step segment; 3152, second step segment; 3153, clamping groove; 3154, annular groove; 316, cutting portion; 317, stop groove; 32, bolt head; 321, pin hole; 322, annular protrusion; 323, stop portion; 33, bolt; 331, main body; 332, limit portion; 333, protrusion; 301, threading channel; 34, locking member; 40, blade tube; 41, main body; 42, cutting segment; 421, blade; 401, first clamping groove; 50, ejector rod; 60, driving mechanism; 61, screw-in member; 611, sliding connection; 6111, slide groove; 6112, first pin shaft hole; 612, Threaded fitting portion; 613, connecting rod portion; 6131, rotation limiting portion; 6132, limiting gap; 614, through hole; 62, fixing member; 621, threaded hole; 63, moving member; 631, rotation connecting portion; 6311, rotation limiting hole; 6312, second pin hole; 632, fixed connecting portion; 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, slider; 70, supporting sleeve; 71, first wire hole; 72, second positioning groove; 80, connecting sleeve; 90, wire guide; 91, wire handle; 92, wire guide; 911, cantilever portion; 1001. First pin; 1002. Second pin; 1003. Pipe clamp; 10031. Third clamping slot; 1004. Fastening screw; 200. Suture thread. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0025] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying 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. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0026] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, 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 specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0027] Although the terms first, second, third, etc. can be used in the text 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 can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teachings of the exemplary embodiments.

[0028] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative 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 "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0029] It should be noted that the terms "distal" and "proximal" are commonly used in the field of interventional medical devices. "Distal" refers to the end away from the operator during surgery, while "proximal" refers to the end closer to the operator. Axial refers to the direction parallel to the line connecting the distal and proximal centers of the medical device; radial refers to the direction perpendicular to the axial direction.

[0030] Please refer to Figures 1, 2, 4, 5 and 6. This embodiment provides a suture locking system 100, which includes a sheath 20, a bolt head assembly 30, a handle 10, a blade tube 40, a push rod 50 and a driving mechanism 60. The bolt head assembly 30 is arranged on the distal side of the sheath 20. The bolt head assembly 30 has a threading channel 301 connected to the sheath 20. The suture 200 can be inserted into the sheath 20 through the threading channel 301. The proximal end of the sheath 20 is connected to the handle 10. The push rod 50 is arranged in the sheath 20, and the push rod 50 can move relative to the sheath 20 along the axial direction of the sheath 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 along the axial direction of the sheath 20 during the movement. When the push rod 50 moves distally along the axial direction of the sheath tube 20, the distal end of the push rod 50 can squeeze the plug head assembly 30. Under the squeezing action of the push rod 50, the plug head assembly 30 can be transformed from the initial state to the locked state, thereby locking the suture threaded through the plug head assembly 30. In other embodiments, the suture locking system 100 may also not include the handle 10, as long as the drive mechanism 60 can control the blade tube 40 and the push rod 50.

[0031] It should be noted that, as shown in Figures 4 and 5, the initial state of the bolt head assembly 30 refers to a state in which the threading channel 301 is unobstructed, at which point the suture 200 can freely enter and exit the threading channel 301, or the suture 200 can freely move within the threading channel 301. As shown in Figures 5 and 14, the locked state of the bolt head assembly 30 refers to a state in which the threading channel 301 is closed and the suture is locked, at which point the suture 200 is fixedly connected to at least part of the components in the bolt head assembly 30. It is understandable that the bolt head assembly 30 can be provided with a variety of structural forms to achieve the transition from the initial state to the locked state. For example, in some embodiments, the bolt head assembly 30 can be deformed as a whole under the squeezing action of the distal end of the push rod 50, causing the threading channel 301 to bend and deform, and the inner wall of the threading channel 301 to radially deform and clamp the suture 200. Alternatively, in other embodiments, through the cooperation between different components in the plug head assembly 30, under the squeezing action of the push rod 50, some components in the plug head assembly 30 are displaced and block the threading channel 301, so that the suture 200 is clamped and fixed in the threading channel 301. Alternatively, in another embodiment, the plug head assembly 30 does not need to be squeezed by the push rod 50 or other components to achieve the locked state. The plug head assembly 30 can always be in the automatic locked state. For example, the plug head assembly 30 is provided with an automatic locking channel inside. The inner diameter of the channel is smaller than the outer diameter of the suture. The interior of the plug head assembly 30 is made of elastic material. The suture 200 is inserted into the channel. The suture 200 and the plug head assembly 30 can be fixed to each other without the action of external force. Then, the plug head assembly 30 is pushed by the push rod 50 to push at least part of the plug head assembly 30 out of the sheath 20. Alternatively, in another embodiment, the push rod 50 may not be provided, and the bolt head assembly 30 may always be in a locked state. For example, a channel that can be automatically locked is provided inside the bolt head assembly 30, and the inner diameter of the channel is smaller than the outer diameter of the suture. The interior of the bolt head assembly 30 is made of elastic material, and the suture 200 is inserted into the channel. The suture 200 and the bolt head assembly 30 can be fixed to each other in the absence of external force, and the sheath 20 is withdrawn, and the bolt head assembly 30 can fall off the sheath 20.

[0032] 4 , the bolt head assembly 30 further includes a cutting portion 316 located inside the sheath tube 20, a blade tube 40 is sleeved outside the push rod 50 and located inside the sheath tube 20, and the blade tube 40 can move relative to the sheath tube 20 along the axial direction of the sheath tube 20, and a blade portion 421 is provided at the distal end of the blade tube 40, and the blade portion 421 is arranged opposite to the cutting portion 316, and the blade portion 421 is in contact with the cutting portion 316. Specifically, the contact and cooperation means that during the axial movement of the blade tube 40 along the sheath tube 20, the blade portion 421 and the cutting portion 316 can be switched between two states of separation and contact. When the blade tube 40 moves axially toward the proximal side, the blade portion 421 and the cutting portion 316 move away from and separate from each other, and when the blade tube 40 moves axially toward the distal side, the blade portion 421 and the cutting portion 316 approach each other and abut against each other.

[0033] In detail, please refer to Figures 4, 5 and 12. The suture thread 200 can be inserted into the sheath tube 20 through the threading channel 301 and is between the cutting portion 316 and the blade portion 421. When the blade tube 40 moves relative to the sheath tube 20 along the axial distal end of the sheath tube 20, the blade portion 421 can contact the cutting portion 316 and clamp the suture thread 200 between the blade portion 421 and the cutting portion 316.

[0034] In this embodiment, please refer to Figures 6, 8 and 12. The proximal end of the blade tube 40 is connected to the driving mechanism 60. During the movement of the driving mechanism 60 relative to the handle 10, the driving mechanism 60 can at least drive the blade tube 40 to rotate around its own axis, so that the blade portion 421 contacts the cutting portion 316 and clamps the suture 200 between the cutting portion 316 and the blade portion 421. When the driving mechanism 60 drives the blade tube 40 to rotate around its own axis, the blade portion 421 rotates relative to the cutting portion 316, and the blade portion 421 can cut the suture 200 in a manner that rotates relative to the cutting portion 316. The blade portion 421 can simultaneously apply pressure and cutting force to the suture 200, thereby improving the cutting effect of the blade portion 421 on the suture 200 and reducing the difficulty of cutting the suture 200. Moreover, compared with the method of merely squeezing the dividing line, the technical solution proposed in the present invention is to cut the suture line 200 by rotating the blade 421 relative to the cutting part 316. This method requires less pressure to cut the line, thereby reducing the pushing force applied by the blade tube 40 to the bolt head assembly 30 and the pressure between the blade 421 and the cutting part 316, thereby reducing the probability of damage to the blade tube 40 or the sheath tube 20.

[0035] In some embodiments, please refer to Figures 4, 8 and 9, the suture locking system 100 further includes a support sleeve 70, which is sleeved outside the push rod 50 and is disposed in the sheath 20. Specifically, the support sleeve 70 is disposed in the blade tube 40, and the distal end of the support sleeve 70 is connected to the bolt head assembly 30, and the proximal end of the support sleeve 70 is connected to the handle 10 for fixation. By adding the support sleeve 70 in the sheath 20, when the push rod 50 moves toward the distal end and squeezes the bolt head assembly 30, The support sleeve 70 can provide a pulling force toward the proximal end of the plug head assembly 30 to at least offset a portion of the pushing force of the push rod 50 toward the distal end. Therefore, the support sleeve 70 can at least help the sheath tube 20 share a portion of the pushing force of the push rod 50 toward the distal end, thereby reducing the probability of the sheath tube 20 being stretched and deformed, and 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, thereby improving the success rate of locking. In other embodiments, the support sleeve 70 can also be inserted into the sheath tube 20 and arranged outside the blade tube 40, and the blade tube 40 moves axially within 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.

[0036] In some embodiments, please refer to Figures 4, 6, 7 and 8, the driving mechanism 60 includes a screw-in member 61 and a moving member 63, and the screw-in member 61 and the moving member 63 are both movably provided on the handle 10. The screw-in member 61 can move along the axial direction of the sheath tube 20 relative to the handle 10 and rotate around the axis of the sheath tube 20. The proximal end of the blade tube 40 is connected to the screw-in member 61. The screw-in member 61 drives the blade tube 40 to move along the axial direction of the sheath tube 20 while also enabling the blade tube 40 to rotate relative to the sheath tube 20 around its own axis. In the process of making the blade 421 contact with the cutting portion 316, the blade 421 can simultaneously apply pressure and cutting force to the suture 200 clamped between the blade 421 and the cutting portion 316, further reducing the difficulty of cutting the suture 200.

[0037] The movable member 63 is movable relative to the handle 10 along the axial direction of the sheath tube 20. The proximal end of the push rod 50 or a position close to the proximal end is connected to the movable member 63, and the push rod 50 is movable along the axial direction under the drive of the movable member 63. In this embodiment, the movable 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 extending through its proximal and distal ends. The proximal end of the blade tube 40 is in communication with the through hole 614. The proximal end of the push rod 50 extends from the proximal end of the blade tube 40 and passes through the through hole 614 before being connected to the movable member 63. By connecting the moving member 63 to the screw-in member 61, the driving mechanism 60 can simultaneously control the axial pushing of the push rod 50 and the axial movement of the blade tube 40 and the rotation around its own axis. Therefore, by manipulating the driving mechanism 60, the bolt head assembly 30 can be controlled to lock the suture 200 and at the same time control the blade tube 40 to cut the locked suture 200, thereby reducing the operational difficulty of the locking and cutting operations of the suture 200 in the suture locking system 100, reducing the operating steps, and helping to improve surgical efficiency and shorten 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 move axially, thereby driving the push rod 50 to axially push the bolt head assembly 30. In another embodiment, there is a second setting method: 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. The movement of the screw-in member 61 enables the moving member 63 to move axially and rotate, thereby driving the push rod 50 to push the bolt head assembly 30 both axially and rotationally.

[0038] Further, please refer to Figures 1, 2, 3 and 6, the driving mechanism 60 also includes a fixing member 62, which is fixed to the handle 10, and the fixing member 62 is provided with a threaded hole 621 extending axially along the sheath tube 20, and the screw-in member 61 is provided with an external thread and is passed through the threaded hole 621 and threadedly engaged with the threaded hole 621, and 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 engagement between the screw-in member 61 and the fixing member 62, the screw-in member 61 can rotate around its own axis while also moving axially, so that the screw-in member 61 can push the blade tube 40 to move axially while also causing the blade tube 40 to rotate around its own axis.

[0039] Furthermore, referring to Figures 3, 6, and 7, the drive mechanism 60 further includes a knob 64, which is sleeved on the outside of the screw-in member 61 and rotatably mounted on the handle 10. A groove 6111 is provided on one of the inner circumference of the knob 64 and the outer circumference of the screw-in member 61, and a slider 641 is provided on the other of the inner circumference of the knob 64 and the outer circumference of the screw-in member 61, which slides in cooperation with the groove 6111. The groove 6111 extends axially along the sheath 20. It is understood that the cooperation between the groove 6111 and the slider 641 allows the knob 64 and the screw-in member 61 to move relative to each other along the axial direction of the sheath 20. However, the cooperation between the groove 6111 and the slider 641 restricts the knob 64 and the screw-in member 61 from rotating relative to each other about their respective axes. Therefore, when the driving knob 64 is rotated, the knob 64 can drive the screw-in member 61 to rotate about its own axis relative to the handle 10 and the fixing member 62 through the cooperation between the sliding groove 6111 and the slider 641. Under the action of the threaded cooperation between the screw-in member 61 and the fixing member 62, the screw-in member 61 simultaneously moves axially relative to the handle 10 and the fixing member 62 along the sheath tube 20. In this embodiment, the axial pushing of the push rod 50 and the axial movement and rotation of the blade tube 40 about its own axis can be controlled by manipulating the knob 64. Therefore, by manipulating the knob 64, the bolt head assembly 30 can be controlled to lock the suture 200 and the blade tube 40 can be controlled to cut the locked suture 200 at the same time, thereby reducing the difficulty of the locking and cutting operations of the suture 200 in the suture locking system 100, reducing the number of operating steps, and facilitating improved surgical efficiency and shortened surgical time.

[0040] In some embodiments of the present invention, the bolt head assembly 30 includes a bolt seat 31 and a locking piece 34. The bolt seat 31 is inserted into the sheath tube 20 and fixedly connected to the sheath tube 20. The bolt seat 31 has a seat hole 315 that passes through its own proximal and distal ends. The locking piece 34 is detachably connected to the bolt seat 31 in the seat hole 315. The locking piece 34 is used to lock the suture thread 200.

[0041] In some embodiments of the present invention, as shown in Figures 2, 4, and 14, the locking member 34 includes a bolt head 32 and a bolt pin 33. The bolt head 32 is engaged within the seat hole 315. The bolt head 32 has a pin hole 321 extending through its proximal and distal ends. The pin hole 321 communicates with the seat hole 315 and together defines a threading passage 301. The distal end of the support sleeve 70 is connected to the bolt seat 31 and communicates with the pin hole 321. When the bolt head assembly 30 is in an initial state, the bolt pin 33 is disposed within the support sleeve 70 and located between the bolt head 32 and the push rod 50. The bolt pin 33 can move within the support sleeve 70 under the push of the push rod 50. In detail, when the push rod 50 moves toward the distal end, the push rod 50 pushes the pin 33 to move toward the distal end in the support sleeve 70. Under the continuous push of the push rod 50, the pin 33 can be inserted into the pin hole 321, so that the pin 33 is plug-connected with the bolt head 32, thereby locking the suture thread passing through the pin hole 321 and changing the bolt head assembly 30 into a locked state.

[0042] It should be noted that the maximum outer diameter of the pin 33 is greater than the inner diameter of the pin hole 321. When the pin 33 is inserted into the pin hole 321, the bolt head 32 at least partially deforms, allowing the pin 33 to be more securely plugged into the bolt head 32, reducing the probability of the pin 33 falling out of the pin hole 321 and improving the secure engagement of the bolt head assembly 30 with the suture 200. In another embodiment, the pin 33 at least partially undergoes compression deformation, allowing the pin 33 to be more securely plugged into the bolt head 32. In other embodiments, the bolt seat 31 may not be provided, and the bolt head 32 may be directly and tightly connected to the sheath tube 20. By ensuring that the force between the pin 33 and the bolt head 32 is smaller than the force between the bolt head 32 and the sheath tube 20, the bolt head 32 will not be pushed out of the sheath tube when the pin 33 is inserted into the pin hole 321 of the bolt head 32. This can be achieved, for example, by providing friction surfaces with different friction coefficients between the pin 33, the bolt head 32, and the sheath tube 20.

[0043] In this embodiment, specifically when the bolt head assembly 30 includes the bolt head 32 and the bolt pin 33, the screw-in member 61 and the movable member 63 are rotatably connected, so that the rotation of the screw-in member 61 is not transmitted to the movable member 63, so that the movable member 63 only moves axially, thereby driving the push rod 50 to axially push the bolt pin 33 into the bolt head 32. In other embodiments, the screw-in member 61 and the movable member 63 can be fixedly connected, so that the rotation of the screw-in member 61 can be transmitted to the movable member 63, and the movement of the screw-in member 61 causes the movable member 63 to move both axially and rotationally, thereby driving the push rod 50 to both axially and rotationally push the bolt pin 33 into the bolt head 32. In other embodiments, the locking member 34 can always be in an automatic locking state. For example, a channel that can be automatically locked is provided inside the locking member 34. The inner diameter of the channel is smaller than the outer diameter of the suture 200. The interior of the locking member 34 is made of elastic material. The suture 200 passes through the channel. The suture 200 and the locking member 34 can be fixed to each other in the absence of external force.

[0044] In some embodiments of the present invention, as shown in Figures 4 and 12, the suture locking system 100 also includes a connecting sleeve 80, which is sleeved outside the supporting sleeve 70 and located in the seat hole 315. The two sides of the connecting sleeve 80 are respectively fixed to the supporting sleeve 70 and the bolt seat 31. By setting a connecting sleeve 80, the connecting sleeve 80 is sleeved on the outer side of the distal end of the support sleeve 70, and then connected to the bolt seat 31 through the connecting sleeve 80, and the bolt seat 31 is further connected to the sheath tube 20. The sheath tube 20, the bolt seat 31, the connecting sleeve 80 and the support sleeve 70 can be connected with each other by glue, so that the four remain relatively fixed, thereby improving the firmness of the connection between the connecting sleeve 80 and the support sleeve 70, the bolt seat 31 and the sheath tube 20, so that the support sleeve 70 can at least offset part of the pushing force of the push rod 50 toward the distal end, so that the support sleeve 70 can better help the sheath tube 20 share the pushing force of the push rod 50 toward the distal end, thereby reducing the probability of the sheath tube 20 being stretched and deformed, and preventing some components of the bolt head assembly 30 (such as the locking piece 34 described below) from being unable to fall off from the sheath tube 20 due to the stretched and deformed sheath tube 20 when they need to fall off, thereby improving the success rate of locking. The sheath tube 20 , the bolt seat 31 , the connecting sleeve 80 and the supporting sleeve 70 are connected to each other by glue, or by welding or other methods.

[0045] Furthermore, as shown in Figures 4 and 5, an annular groove 3154 extending along the circumference of the seat hole 315 is provided in the seat hole 315, and the connecting sleeve 80 is disposed in the annular groove 3154. By providing the annular groove 3154 in the seat hole 315, when the pushing force of the push rod 50 is transmitted to the bolt seat 31, the proximal end of the connecting sleeve 80 can abut against the side wall of the annular groove 3154, thereby reducing the probability of the connecting sleeve 80 being dislodged from the seat hole 315 under the pulling force of the support sleeve 70.

[0046] In some embodiments of the present invention, as shown in Figures 10 and 12, the outer circumference of the support sleeve 70 is provided with a first wire hole 71, and the outer circumference of the sheath tube 20 is provided with a second wire hole 21. The suture 200 can be inserted into the support sleeve 70 through the threading channel 301 and pass through the first wire hole 71 and the second wire hole 21 in sequence to extend out of the sheath tube 20, so that at least part of the suture 200 is between the cutting portion 316 and the blade portion 421. When the blade tube 40 moves toward the distal end under the drive of the driving mechanism 60, the suture 200 can be clamped between the blade portion 421 and the cutting portion 316, and the suture 200 can be cut. In one embodiment, only the first thread hole 71 can be provided on the support sleeve 70. For example, after the suture 200 is passed through the first thread 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 between the cutting portion 316 and the blade portion 421. When the blade tube 40 moves toward the distal end under the drive of the drive mechanism 60, the suture 200 can be clamped between the blade portion 421 and the cutting portion 316, and the suture 200 can be cut. In one embodiment, only the second thread hole 21 can be provided on the outer peripheral surface of the sheath tube 20. After the suture 200 passes through the pin hole 321 and enters between the cutting portion 316 and the blade portion 421, 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.

[0047] Please refer to Figures 2, 3, 6 and 8. Since the push rod 50, the support sleeve 70, the blade tube 40 and the sheath tube 20 are stacked in sequence from the inside to the outside, and the sheath tube 20 and the support sleeve 70 are fixedly connected to the handle 10, and the proximal ends of the push rod 50 and the blade tube 40 are connected to the drive mechanism 60 and can move relative to the sheath tube 20 and the support sleeve 70 along the axial direction of the sheath tube 20, respectively, in order to achieve the above functions and prevent the push rod 50, the support sleeve 70, the blade tube 40 and the sheath tube 20 from interfering with each other, in some embodiments of the present invention, the following solutions are provided:

[0048] Further, referring to Figure 3, the handle 10 has a accommodating cavity 101, and the proximal end of the sheath 20 is connected to the distal end of the handle 10 and communicates with the accommodating cavity 101. From the distal end to the proximal end, referring to Figures 8 and 9, the inner wall of the accommodating cavity 101 is successively provided with a second fixing groove 105 and a support portion 106, and the second fixing groove 105 and the support portion 106 are both located in the accommodating cavity 101. The fixing member 62 is fixedly installed in the second fixing groove 105, and the proximal end of the blade tube 40 extends from the proximal end of the sheath 20 and extends into the accommodating cavity 101 and is inserted into the through hole 614 of the screw-in member 61 and fixedly connected to the screw-in member 61. The proximal end of the screw-in 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 is provided with a second sliding structure 6301 slidably connected to the first sliding structure 102, so that the screw-in member 61 can drive the moving member 63 to move axially along the support sleeve 70 and the moving member 63 will not rotate with the screw-in member 61 under the constraints 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 is connected to the avoidance groove 6302, the support portion 106 protrudes along the radial direction of the sheath tube 20 and extends into the avoidance groove 6302, the proximal end of the support sleeve 70 extends from the proximal end of the through hole 614 into the avoidance groove 6302 and is connected to the support portion 106, and the proximal end of the push rod 50 extends from the proximal end of the support sleeve 70 and is connected to the moving member 63.

[0049] In the embodiment of the present invention, the sheath tube 20 and the blade tube 40 are coaxially arranged.

[0050] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0051] Example 1

[0052] In this embodiment, as shown in Figures 1, 2, 4 and 6, the suture locking system 100 includes: a handle 10, a sheath 20, a plug head assembly 30, a blade tube 40, a push rod 50, a support sleeve 70, a connecting sleeve 80 and a drive mechanism 60.

[0053] Specifically, as shown in Figures 2 and 3, the handle 10 includes an upper shell 11, a lower shell 12, an end cover 13 and a stress relief sleeve 14. The upper shell 11 and the lower shell 12 are arranged in a pair, and an accommodating chamber 101 is defined between the upper shell 11 and the lower shell 12. The end cover 13 is in the shape of a conical cover. The stress relief sleeve 14 includes a connected fixing portion 141 and a tubular portion 142. The tubular portion 142 is an axially extending tubular structure. The fixing portion 141 is provided at the proximal end of the tubular portion 142. A first fixing groove 103 for installing the fixing portion 141 and an end cover mounting portion 104 located on the distal side of the first fixing groove 103 are provided at the distal ends of the upper shell 11 and the lower shell 12. The end cover 13 is installed on the end cover mounting portion 104, the fixing portion 141 is installed in the first fixing groove 103, and the distal end of the tubular portion 142 passes through the end cover mounting portion 104 and the end cover 13 in sequence and extends out from the distal end of the end cover 13. The proximal end of the sheath tube 20 is inserted into the tubular portion 142 of the strain relief sleeve 14 and fixedly connected to the tubular portion 142 , and the proximal end of the sheath tube 20 is communicated with the accommodating cavity 101 .

[0054] As shown in FIG. 2 and FIG. 4 , the bolt head assembly 30 includes a bolt seat 31 , a bolt head 32 and a bolt pin 33 . The bolt seat 31 is disposed in the sheath tube 20 and is fixedly connected to the sheath tube 20 .

[0055] When the cam 314 is in the closed position, the cam 314 is in the closed position, and the cam 314 is in the closed position, so that the cam 314 can be rotated to move the cam 314 upwards, thereby increasing the cam 314 rotation speed and reducing the cam 314 rotation.

[0056] The bolt seat 31 has a seat hole 315 extending through its proximal and distal ends. A retaining groove 3153 is provided within the seat hole 315. The retaining groove 3153 is annular and extends circumferentially along the seat hole 315. The outer circumferential surface of the proximal end of the bolt head 32 is provided with an annular protrusion 322 that engages with the retaining groove 3153. The engagement of the annular protrusion 322 with the retaining groove 3153 secures the bolt head 32 to the bolt seat 31. When a distal thrust is applied to the bolt head 32 that exceeds the retaining force of the annular protrusion 322 and the retaining groove 3153, the bolt head 32 is released from the bolt seat 31. To facilitate smooth release of the bolt head 32, the distal end of the annular protrusion 322 and the distal sidewall of the retaining groove 3153 are both inclined.

[0057] Furthermore, a stop portion 323 is convexly provided on the outer peripheral surface of the distal end of the bolt head 32, and a stop groove 317 is provided on the distal end surface of the bolt seat 31. The proximal end surface of the stop portion 323 cooperates with the side wall stop of the proximal end of the stop groove 317 to prevent the bolt head 32 from being too deep into the bolt seat 31 when being assembled into the bolt seat 31.

[0058] The bolt head 32 has a pin hole 321 extending through its proximal and distal ends. The pin hole 321 communicates with the seat hole 315 and together define the threading channel 301. The seat hole 315 is provided with an annular groove 3154 extending along the circumference of the seat hole 315. The annular groove 3154 is located proximal to the retaining groove 3153. The connecting sleeve 80 is disposed within the annular groove 3154 and sleeved onto the support sleeve 70. The sheath 20, bolt seat 31, connecting sleeve 80, and support sleeve 70 are bonded and secured together using glue. The distal end of the support sleeve 70 abuts the proximal end of the bolt head 32 and communicates with the pin hole 321. The push rod 50 is arranged in the support sleeve 70 and can move axially relative to the support sleeve 70. The pin 33 is arranged in the support sleeve 70 and is located between the bolt head 32 and the distal end of the push rod 50. The pin 33 can move in the support sleeve 70 under the push of the push rod 50. When the push rod 50 moves toward the distal end, the push rod 50 pushes the pin 33 to move toward the distal end in the support sleeve 70. Under the continuous push of the push rod 50, the pin 33 can be inserted into the pin hole 321, so that the pin 33 is plug-connected with the bolt head 32, thereby locking the suture thread passing through the pin hole 321.

[0059] In this embodiment, as shown in Figures 4 and 5 , the proximal end of the pin hole 321 has a trumpet-shaped flared structure to facilitate insertion of the pin 33 into the pin hole 321 and provide guidance. The pin 33 comprises a cylindrical main body 331, a stopper 332 disposed at the proximal end of the main body 331, and a raised portion 333 disposed around the outer circumference of the main body 331. The distal end of the main body 331 is formed into a smoothly transitioning arcuate surface, which provides guidance during insertion of the pin 33 into the pin hole 321. The distal end surface of the raised portion 333 is inclined, and its maximum outer diameter is greater than the inner diameter of the pin hole 321. When the main body 331 of the pin 33 is inserted into the pin hole 321, the raised portion 333 elastically deforms and is radially compressed. The elastic force generated by the deformation of the raised portion 333 secures the pin 33 in the pin hole 321 and locks the suture thread passing through the pin hole 321. The outer diameter of the stopper 332 is larger than the outer diameter of the pin hole 321, so that the distal end surface of the stopper 332 abuts against the proximal end surface of the bolt head 32, thereby limiting the insertion depth of the pin 33 into the bolt head 32. As the push rod 50 continues to move distally, the stopper 332 pushes the bolt head 32 out of the seat hole 315. In another embodiment, the bolt head 32 is more susceptible to deformation than the pin 33. The outer diameter of the pin 33 is larger than the inner diameter of the pin hole 321 of the bolt head 32. When the pin 33 is inserted into the bolt head 32, the bolt head 32 expands and deforms, and the inner diameter of the pin hole 321 is enlarged by the pin 33, thereby firmly securing the pin 33 within the pin hole 321.

[0060] Furthermore, the blade tube 40 is sleeved on the outside of the support sleeve 70 and is located inside the sheath tube 20. The blade tube 40 can move relative to the sheath tube 20 along the axial direction of the sheath tube 20. The distal end of the blade tube 40 is provided with a blade portion 421, and the proximal end of the bolt seat 31 is provided with a cutting portion 316. 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 blade portion 421 and the cutting portion 316 are arranged opposite to each other. When the blade tube 40 moves along the axial direction, the blade portion 421 and the cutting portion 316 can be transformed between a separation state and a pressed contact state.

[0061] As shown in Figure 12, the outer circumference of the support sleeve 70 is provided with a first wire hole 71, and the outer circumference of the sheath tube 20 is provided with a second wire hole 21. The suture thread 200 can be inserted into the support sleeve 70 through the threading channel 301 and pass through the first wire hole 71 and the second wire hole 21 in sequence to extend out of the sheath tube 20, so that at least part of the suture thread 200 is between the cutting portion 316 and the blade portion 421. When the blade tube 40 moves toward the distal end, the suture thread 200 can be clamped between the blade portion 421 and the cutting portion 316, and the suture thread 200 can be cut.

[0062] In this embodiment, please refer to Figures 2, 6, 7 and 8, the driving mechanism 60 includes a screw-in member 61, a fixing member 62, a moving member 63 and a knob 64. From the distal end to the proximal end, the inner wall of the accommodating cavity 101 is sequentially provided with a second fixing groove 105 and a support portion 106 spaced apart from each other. The fixing member 62 is fixedly installed in the second fixing groove 105. The fixing member 62 is provided with a threaded hole 621 extending along the axial direction of the sheath tube 20 and passing through the proximal and distal ends of the fixing member 62. The screw-in member 61 is in the shape of a long strip extending along the axial direction as a whole, and from the proximal end to the distal end, the screw-in member 61 includes a sliding connection portion 611, a threaded matching portion 612 and a connecting rod portion 613 connected in sequence. The outer peripheral surface of the threaded matching portion 612 is provided with an external thread threadedly matched with the threaded hole 621. The threaded matching portion 612 of the screw-in member 61 is penetrated into the threaded hole 621 of the fixing member 62 and is engaged with the threaded hole The cam 621 is threadedly engaged, 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 sliding groove 6112 extending along the axial direction of the sheath tube 20. The knob 64 is tubular, and the knob 64 is sleeved on the outside of the sliding connection portion 611. The inner wall surface of the knob 64 is provided with a slider 641 extending along the axial direction of the sheath tube 20. The slider 641 is slidably arranged in the sliding groove 6111 through the knob 64 and is rotatably arranged on the handle 10. When the driving knob 64 is rotated, the sliding groove 6111 cooperates with the slider 641, and 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 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.

[0063] Further, please refer to Figures 3, 6, 7 and 11. The screw-in member 61 is provided with a through hole 614 running through its proximal and distal ends. The sliding connection portion 611 is also provided with a plurality of first pin holes 6112 arranged along the radial direction of the sheath tube 20. The first pin holes 6112 are communicated with the through hole 614. The outer peripheral surface of the blade tube 40 is provided with a first locking groove 401. The first locking groove 401 is arranged near the proximal end of the blade tube 40. The proximal end of the blade tube 40 is inserted into the through hole 614, and the first pin 1001 is inserted into the first pin hole 6112 and the part of the pin extending into the through hole 614 is locked in the first locking groove 401, thereby fixing the proximal end of the blade tube 40 to the screw-in member 61.

[0064] In some embodiments, two of the multiple first positioning grooves 401 are grouped together, and the multiple groups of first positioning grooves 401 are spaced apart in sequence along the axial direction of the blade tube 40, and the two first positioning grooves 401 in each group are respectively located on the left and right sides of the axis of the blade tube 40; two of the multiple first pin shaft holes 6112 are grouped together, and the multiple groups of first pin shaft holes 6112 are spaced apart in sequence along the axial direction of the blade tube 40, and the two first pin shaft 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 shaft holes 6112 in each group can be aligned with the two first positioning grooves 401 in each group, so that the two first pin shafts 1001 embedded in the first pin shaft holes 6112 can be respectively locked into the two first positioning grooves 401. It should be noted that by providing multiple groups of first retaining grooves 401 and multiple groups of first pin holes 6112 along the axial direction, the connection strength between the blade tube 40 and the screw-in member 61 can be improved. Furthermore, by adjusting the alignment of different groups of first retaining grooves 401 and first pin holes 6112 as needed, the relative axial position of the blade tube 40 and the bolt head assembly 30 can be adjusted, thereby adjusting the relative position between the distal end of the blade tube 40 and the distal end of the push rod 50, to ensure that the blade portion 421 at the distal end of the blade tube 40 can contact the cutting portion 316 and sever the suture thread 200 after the bolt pin 33 is fully inserted into the bolt head 32. In other embodiments, there can be only one first retaining groove 401.

[0065] 6 and 7 , the movable member 63 includes a rotating connection portion 631 and a fixed connection portion 632 spaced apart along the axial direction of the sheath tube 20. The movable member 63 also includes a first side wall 633 and a second side wall 634 connecting the rotating connection portion 631 and the fixed connection portion 632. The first side wall 633 and the second side wall 634 are spaced apart along the radial direction of the sheath tube 20, and an escape groove 6302 is enclosed between the rotating connection portion 631, the first side wall 633, the fixed connection portion 632, and the second side wall 634. The rotating connection portion 631 is provided with a rotation limiting hole 6311 running through its proximal and distal ends. The rotating connection portion 631 is also provided with a second pin shaft hole 6312 extending along the radial direction of the sheath tube 20, and the second pin shaft hole 6312 is communicated with the rotation limiting hole 6311.

[0066] As shown in Figures 3, 6 and 7, the proximal end of the connecting rod portion 613 of the screw-in member 61 is provided with a plurality of rotation limiting portions 6131 spaced in sequence along the axial direction of the sheath tube 20. The rotation limiting portions 6131 are annular and convexly arranged on the outer circumferential 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, and the second pin shaft hole 6312 is embedded in the second pin shaft 1002. , and the part of the second pin shaft 1002 located in the rotation limit hole 6311 is arranged in the limit gap 6132, so that along the axial direction of the sheath tube 20, the second pin shaft 1002 is respectively matched with the two adjacent rotation limit parts 6131 stops, so that the screw-in member 61 can rotate around the axis of the blade tube 40 relative to the moving member 63, but the relative movement of the screw-in member 61 and the moving member 63 along the axial direction of the sheath tube 20 is limited by the cooperation between the second pin shaft 1002 and the stop of the rotation limit part 6131.

[0067] Please refer to Figures 8, 9 and 10. The support portion 106 includes a plurality of plate-shaped side plates arranged along the radial direction of the sheath tube 20 and forming a slot 1061 with an open side between the plurality of side plates. 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 from the proximal end of the blade tube 40 and passes through the through hole 614 and then extends into the avoidance groove 6302. The suture locking system 100 also includes a tube clamp 1003. The tube clamp 1003 is provided with a third clamping groove 10031 with an open end. The tube clamp 1003 is inserted into the slot 1061 and the tube clamp 1003 is clamped into the second clamping groove 72 of the support sleeve 70, so that the tube clamp 1003 respectively cooperates with the proximal side wall and distal side wall stop of the second clamping groove 72, thereby limiting the support sleeve 70 from moving relative to the handle 10 along the axial direction of the sheath tube 20.

[0068] In some embodiments, as shown in FIG10 , the outer circumferential surface of the support sleeve 70 is provided with a plurality of second retaining grooves 72 , with two of the plurality of second retaining grooves 72 forming a group. The plurality of groups of second retaining grooves 72 are sequentially spaced along the axial direction of the support sleeve 70 , with the two second retaining grooves 72 in each group being located on the left and right sides of the axis of the support sleeve 70 , respectively. The support portion 106 has a plurality of slots 1061 , each slot 1061 being provided with a pipe clamp 1003 and corresponding to a second retaining groove 72 , thereby improving the connection strength between the support sleeve 70 and the support portion 106 . In other embodiments, the number of second retaining grooves 72 may be one.

[0069] Further, please refer to Figures 3, 6 and 8. 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 is communicated with the first fastening hole 6321. A fastening screw 1004 is provided in the second fastening hole 6322. The proximal end of the push rod 50 is passed through the first fastening hole 6321, and the fastening screw 1004 passing through the second fastening hole 6322 locks the push rod 50 and the fixed connection part 632.

[0070] Furthermore, as shown in Figure 8, one of the movable member 63 and the handle 10 is provided with a first sliding structure 102 extending along the axial direction of the sheath 20, and the other of the two is provided with a second sliding structure 6301 slidingly connected to the first sliding structure 102, so that the screw-in member 61 can drive the movable member 63 to move along the axial direction of the support sleeve 70 and the movable member 63 will not rotate with the screw-in member 61 under the restriction of the first sliding structure 102 and the second sliding structure 6301.

[0071] It can be understood that the first sliding structure 102 and the second sliding structure 6301 can be set to a variety of sliding matching structural forms. For example, the first sliding structure 102 is a sliding groove, and the second sliding structure 6301 is a slider that slides with the sliding groove. For example, the first sliding structure 102 is set to a sliding rod, and the second sliding structure 6301 is set to a sliding hole that slides with the sliding rod.

[0072] In this embodiment, the axial pushing of the push rod 50 and the axial movement of the blade tube 40 and the rotation around its own axis can be controlled by one button by operating the knob 64. Therefore, by operating the knob 64, the bolt head assembly 30 can be controlled to lock the suture 200 and the blade tube 40 can be controlled to cut the locked suture 200 at the same time, which reduces the difficulty of locking and cutting the suture 200 in the suture locking system 100, reduces the operation steps, and is conducive to improving surgical efficiency and shortening surgical time. It should also be noted that by adding a support sleeve 70, the support sleeve 70 is used to offset at least part of the pushing force of the push rod 50 toward the distal end, so that the support sleeve 70 can better help the sheath tube 20 share the pushing force of the push rod 50 toward the distal end, thereby reducing the probability of the sheath tube 20 being stretched and deformed.

[0073] In some embodiments of the present invention, please refer to Figures 1, 2, 12 and 14, the suture locking system 100 also includes a wire guide 90, the wire guide 90 includes a wire handle 91 and a wire guide wire 92 connected to the wire handle 91, the distal end of the wire guide wire 92 can pass through the second wire hole 21 and the first wire hole 71 in turn into the support sleeve 70, and then pass through the seat hole 315 of the bolt seat 31 and the pin hole 321 of the bolt head 32 from the distal end of the bolt head 32, the wire guide wire 92 is an annular sleeve structure formed by folding a silk thread in half. The lead handle 91 is roughly in the shape of a flat plate. The plate surfaces on both sides of the lead handle 91 are concave and provided with a plurality of long strip-shaped protrusions extending along the plate surfaces to increase friction and facilitate gripping. One end of the lead handle 91 is provided with two cantilever portions 911 spaced apart. The two cantilever portions 911 are used to clamp the lead handle 91 outside the sheath tube 20 and can slide relative to the sheath tube 20 along the axial direction of the sheath tube 20.

[0074] In this embodiment, the suture locking process of the suture locking system 100 is as follows:

[0075] Taking the foramen ovale suture surgery as an example, after the foramen ovale suture surgery is completed, the end of the suture thread 200 is exposed outside the body. First, the guide wire 92 is used to capture the exposed part of the suture thread 200 exposed outside the body, and the guide handle 91 is controlled to slide along the axial direction of the sheath tube 20 toward the proximal side, so that the guide wire 92 pulls the exposed part of the suture thread 200 through the pin hole 321 and the seat hole 315 into the support sleeve 70 in turn, and then passes through the first wire hole 71 and the second wire hole 21 to pass out of the sheath tube 20; then, by manipulating the suture thread locking system 100, the distal end of the sheath tube 20 is pushed to the suture position under the guidance of the suture thread 200, and the knob 64 is driven to rotate. The knob 64 drives the push rod 50 and the blade tube 40 to be pushed toward the distal end at the same time. Under the continuous push of the push rod 50, the bolt pin 33 can be inserted to The pin 33 and the bolt head 32 are plugged into the pin hole 321 to form a whole, thereby locking the suture thread passing through the pin hole 321. The blade 421 of the blade tube 40 moves distally until it abuts against the cutting portion 316 of the bolt seat 31, and under the drive of the knob 64, the blade tube 40 moves distally while rotating around its own axis, so that the blade 421 applies pressure and cutting force to the suture thread 200 clamped between the blade 421 and the cutting portion 316, thereby cutting the suture thread 200. Finally, the knob 64 is continued to be driven to rotate, and the push rod 50 continues to move distally until the pin 33 and the bolt head 32 are pushed out of the seat hole 315 of the bolt seat 31, completing the locking of the suture thread 200, and the sheath tube 20 together with the bolt seat 31 are withdrawn from the body, completing the locking operation of the suture thread 200.

[0076] In other embodiments of the present invention, as shown in Figure 13, the cutting portion 316 is provided on the inner wall surface of the threading channel 301, and the blade portion 421 is formed on the outer peripheral surface of the blade tube 40, and the outer peripheral surface of the blade portion 421 contacts and cooperates with the inner annular surface of the cutting portion 316. In this embodiment, the seat hole 315 of the bolt seat 31 is set to be stepped, and the seat hole 315 includes a first step segment 3151 and a second step segment 3152 that are connected to each other. The first step segment 3151 is located at the proximal end relative to the second step segment 3152, and the inner diameter of the first step segment 3151 is larger than the inner diameter of the second step segment 3152. The inner wall of the first step segment 3151 forms a cutting portion 316, and the distal end of the blade tube 40 can be inserted into the seat hole 315 of the first step segment 3151. The blade portion 421 is formed on the outer peripheral surface of the blade tube 40 and can contact and cooperate with the inner wall of the first step segment 3151. When the axial movement of the blade tube 40 is controlled by the operating knob 64 and rotated around its own axis, the blade portion 421 continuously cuts the suture thread 200 located between the blade portion 421 and the cutting portion 316 during the rotation process, thereby cutting the suture thread 200.

[0077] Example 2

[0078] The differences between Example 2 and Example 1 will be described below, and the same or similar aspects between Example 2 and Example 1 will not be repeated here.

[0079] In this embodiment, as shown in Figures 11 and 12, the blade 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 blade portion 421 is provided at the distal end of the cutting section 42. The bending resistance of the cutting section 42 is higher than that of the main body section 41.

[0080] Specifically, the main body section 41 has a higher degree of bending performance than the cutting section 42, allowing the main body section 41 to conform to the curved structure of blood vessels within the human body, facilitating smoother insertion of the main body section 41 into the target position within the human body along with the sheath tube 20. The cutting section 42 has greater hardness, rigidity, and bending resistance than the main body section 41. During the process of pushing the blade 421 at the distal end of the blade tube 40 and performing the cutting action, the cutting section 42 can apply sufficient pressure and cutting force to the suture 200 between the blade 421 and the cutting portion 316, ensuring that the blade 421 severs the suture 200.

[0081] In some embodiments, the cutting segment 42 and the main segment 41 are made of the same material, but the wall thickness of the main segment 41 is smaller than the wall thickness of the cutting segment 42, so that the bending performance of the main segment 41 is higher than the bending performance of the cutting segment 42, that is, the main segment 41 has better flexibility than the cutting segment 42.

[0082] In some embodiments, as shown in Figure 12, the cutting segment 42 and the main body segment 41 are made of different materials, and the hardness and rigidity of the material of the cutting segment 42 are higher than the hardness and rigidity of the main body segment 41. For example, the cutting segment 42 can be made of steel, etc. The supporting performance of the cutting segment 42 is higher than the supporting performance of the main body segment 41. At least part of the cutting segment 42 is arranged outside the main body segment 41, and the cutting segment 42 and the main body segment 41 are connected to form an integrated structure by laser welding, soldering or adhesive bonding.

[0083] The foregoing description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be readily conceived by a person skilled in the art within the technical scope disclosed in the present invention are intended to be encompassed within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A suture locking system, characterized in that, The suture locking system includes a driving mechanism, a sheath tube, a plug head assembly provided at the distal end of the sheath tube, a blade tube provided in the sheath tube, and a cutting portion provided in the sheath tube. The plug head assembly includes a threading channel communicating with the sheath tube. A blade portion in contact and cooperation with the cutting portion is provided at the distal end of the blade tube. A suture can extend into the sheath tube through the threading channel and be located between the cutting portion and the blade portion. The proximal end of the blade tube is connected to the driving mechanism. During the operation of the driving mechanism, the driving mechanism can simultaneously drive the blade tube to move axially along the sheath tube relative to the sheath tube and rotate around its own axis.

2. The suture locking system according to claim 1, wherein The driving mechanism includes a screwing member, and the proximal end of the blade tube is connected to the screwing member. The screwing member moves axially along the sheath tube and rotates around the axis of the blade tube.

3. The suture locking system according to claim 2, wherein The driving mechanism further includes a fixing member. The fixing member is provided with a threaded hole extending axially along the sheath tube. The screwing member is provided with an external thread and passes through the threaded hole. The external thread is in threaded cooperation with the threaded hole.

4. The suture locking system according to claim 2, wherein The driving mechanism further includes a moving member. The moving member can move axially along the sheath tube and is connected to the proximal end of the screwing member. The suture locking system further includes a push rod. The push rod is provided in the blade tube. The screwing member is provided with a through hole penetrating through its proximal end and distal end. The proximal end of the blade tube communicates with the through hole. The proximal end of the push rod extends out from the proximal end of the blade tube and passes through the through hole to be connected to the moving member. The push rod can move axially along the sheath tube under the drive of the moving member. During the process of the push rod moving distally, the distal end of the push rod can squeeze the plug head assembly. The plug head assembly has an initial state and a locking state. The plug head assembly can be changed from the initial state to the locking state under the squeezing action of the push rod, so as to lock the suture passing through the plug head assembly.

5. The suture locking system according to claim 4, wherein The suture locking system further includes a support sleeve. The support sleeve is sleeved outside the push rod. The distal end of the support sleeve communicates with the threading channel, and the proximal end of the support sleeve is fixed.

6. The suture locking system according to claim 4, wherein, The plug head assembly includes a plug head and a plug pin. The plug head has a pin hole penetrating through its proximal end and distal end. The threading channel includes the pin hole. In the initial state, the plug pin is located between the plug head and the push rod, and the plug pin can move in the sheath tube under the push of the push rod. In the locking state, the plug pin is inserted into the pin hole.

7. The suture ligation system according to claim 6, wherein The plug head assembly further includes a plug seat. The sheath tube is fixedly connected to the plug seat. The plug seat has a seat hole penetrating through its proximal end and distal end. The plug head is detachably provided in the seat hole. The pin hole and the seat hole jointly define the threading channel.

8. The suture locking system according to claim 5, wherein, The outer peripheral surface of the support sleeve is provided with a first thread passing hole. The suture can extend into the space between the cutting portion and the blade portion through the threading channel, the support sleeve, and the first thread passing hole in sequence.

9. The suture locking system according to claim 2, wherein The driving mechanism further includes a knob, the knob is sleeved outside the screw-in member, a chute is provided on one of the inner peripheral surface of the knob and the outer peripheral surface of the screw-in member, and a slider that is slidably engaged with the chute is provided on the other of the two, and the chute extends along the axial direction of the sheath tube.

10. The suture locking system according to any one of claims 1 to 9, characterized in that, The cutting part is arranged at the proximal end of the bolt head assembly and has a cutting surface facing the proximal end, and the cutting edge is formed at the distal end of the cutting tube and is arranged opposite to the cutting surface; Alternatively, the cutting part is arranged on the inner wall surface of the wire threading channel, and the cutting edge is formed on the outer peripheral surface of the cutting tube.

11. The suture locking system according to any one of claims 1 to 9, characterized in that, 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 arranged 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.

12. The suture locking system according to any one of claims 1 to 9, characterized in that, A second wire passing hole is provided on the outer peripheral surface of the sheath tube, and the suture can pass through the wire threading channel, the sheath tube and the second wire passing hole in sequence and penetrate out of the sheath tube, so that at least part of the suture is located between the cutting part and the cutting edge.

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