A tangential cutting assembly and stapling device

Abstract

This invention relates to the technical field of interventional devices, and in particular to a suture cutting assembly and suturing device. It includes a tubular structure, a cutting arm, and a cutting drive device. The tubular structure has a cutting channel for suture insertion. The cutting arm has a fixed end and a cutting end at its two ends. The fixed end is fixed to the tubular structure. By operating the cutting drive device, the cutting end moves towards the axis of the cutting channel. Therefore, the cutting arm bends and extends from the fixed end towards the axis closer to the cutting channel until the cutting end contacts and cuts the suture. This provides excellent shearing force and is suitable for shaping into small-sized cutting structures.

Description

Technical Field

[0001] This invention relates to the technical field of interventional devices, and in particular to a tangent assembly and suturing device. Background Technology

[0002] During interventional surgery, because the distance between the surgeon's operating position and the target position inside the patient's body is relatively far, it is necessary to use a catheter to deliver the suture cutting device to the target position inside the patient's body in order to perform the suture cutting operation at the target position. However, the setting of the catheter will limit the design size of the suture cutting device, resulting in poor suture cutting effect.

[0003] Therefore, there is an urgent need for a broken wire structure that can be molded into small sizes and has good shear strength. Summary of the Invention

[0004] One technical problem solved by this invention is that existing suture cutting devices are insufficient to guarantee normal suture cutting operations during interventional surgery due to size limitations.

[0005] A suture cutting assembly includes a tubular structure, a cutting arm, and a cutting drive device. The tubular structure has a cutting channel for suture insertion. The cutting arm includes a fixed end and a cutting end opposite to each other. The fixed end is fixed to the tubular structure. The cutting drive device can drive the cutting end to move toward the axis of the cutting channel, thereby cutting the suture in the cutting channel.

[0006] One technical effect of one embodiment of the present invention is that, when the present invention is used, by operating the cutting drive device, the cutting end moves toward the axis of the cutting channel, so the cutting arm bends and extends from the fixed end toward the axis close to the cutting channel to the cutting end, until the cutting end contacts the suture and cuts the suture, which has the advantage of excellent shearing force and is suitable for shaping into small-sized cutting structures. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of a suturing device;

[0008] Figure 2 for Figure 1 A magnified view of part A in the image;

[0009] Figure 3 This is a schematic diagram of the internal structure of the tube.

[0010] Figure 4 This is a schematic diagram of a suturing device;

[0011] Figure 5 This is a schematic diagram of the stitching assembly.

[0012] Figure 6This is a schematic diagram of the assembly structure of the puncture needle and the steel sheath;

[0013] Figure 7a This is a schematic diagram showing the state where the needle is not inserted into the steel sleeve.

[0014] Figure 7b This is a schematic diagram showing the state of the needle inserted into the steel sleeve.

[0015] Figure 7c This is a schematic diagram showing the needle bar retracted after the needle tip is inserted into the steel sleeve.

[0016] Figure 8a This is a schematic diagram showing the included angles α and β of the suture arm in a state of perpendicular motion relative to the tube body;

[0017] Figure 8b This is a schematic diagram showing the included angles α and β of the distal end of the suture arm relative to the tube body in a state of rotation.

[0018] Figure 8c This is a schematic diagram showing the included angles α and β of the proximal end of the suture arm relative to the tube body in a state of rotation.

[0019] Figure 8d This is a schematic diagram showing the included angles α and β between the two sides of the suture arm and the tube body under rotation.

[0020] Figure 9 This is a schematic diagram illustrating the movement of the suture arm during the suturing process;

[0021] Figure 10 This is a schematic diagram of the suture arm.

[0022] Figure 11 This is a schematic diagram of the wiring channel.

[0023] Figure 12 This is a schematic diagram of the rotating part and the rotating ring;

[0024] Figure 13 This is a schematic diagram of the winding assembly.

[0025] Figure 14 This is a diagram showing the positional relationship of the sliding groove on the handle;

[0026] Figure 15 This is a schematic diagram of the puncture drive device;

[0027] Figure 16a This is a diagram showing the initial state of the suture device in use.

[0028] Figure 16b This is a schematic diagram illustrating the action of fixing the needle to the steel sleeve during the suturing process;

[0029] Figure 16c This is a schematic diagram illustrating the retraction of the needle bar during the suturing process.

[0030] Figure 16d This is a diagram illustrating the action of shrinking the suture loop during the suturing process;

[0031] Figure 16e A schematic diagram illustrating the action of the tube body exiting the tissue opening;

[0032] Figure 17 This is an assembly diagram of the fasteners and locking components;

[0033] Figure 18 This is a structural schematic diagram of the locking component;

[0034] Figure 19 This is an assembly diagram of the fastener and the mounting platform;

[0035] Figure 20 This is a schematic diagram of the locking drive device.

[0036] Figure 21 This is a schematic diagram of a tubular structure;

[0037] Figure 22 This is a side sectional view of a tubular structure;

[0038] Figure 23 A schematic diagram of one embodiment of the cutting drive device;

[0039] Figure 24 This is a schematic diagram of the straight-line abutment section;

[0040] Figure 25 This is a schematic diagram of the curved abutment section.

[0041] Figure 26 This is a schematic diagram of another embodiment of the cutting drive device.

[0042] In the attached image:

[0043] a. Tissue opening; b. Tissue wall;

[0044] 1. Thread set; 11. First suture; 111. First connecting end; 12. Second suture; 121. Second connecting end; 100. Suturing device; 101. Binding end; 102. Free end; 103. Suture ring;

[0045] 2. Wire locking assembly; 21. Wire locking channel; 22. Fixing component; 221. Mounting channel; 23. Locking component; 231. Locking ring; 232. Locking head; 233. Engaging post; 2321. Locking plate; 2322. External thread; 2323. Clamping block; 2324. Arc surface;

[0046] 3. Suture assembly; 31. Suture arm; 311. Rotating part; 312. Main body; 313. Mounting hole; 314. Deformation groove; 32. Puncture needle; 321. Needle bar; 3211. Connecting hole; 322. Needle tip; 3221. Conical head; 3222. Connecting part; 33. Steel sleeve; 331. Engaging part; 332. Engaging channel; 333. Insertion hole; 334. Elastic sheet;

[0047] 4. Tube body; 401. Receiving cavity; 402. Protruding column; 403. Threading channel; 41. Distal opening; 411. Guide wire port; 42. Needle exit channel; 43. Thread storage port; 44. Mounting groove; 45. Threading port; 46. Threading part; 48. Rotating ring; 49. Mounting platform;

[0048] 5. Sewing drive device; 51. First pull wire; 52. Second pull wire; 53. Thread winding assembly; 531. Winding post; 532. Handle; 533. Thread winding spool;

[0049] 6. Handle; 61. Sliding groove;

[0050] 7. Puncture drive device; 71. Handle; 72. Sliding block; 73. Push block;

[0051] 8. Cutting assembly; 81. Cutting arm; 811. Fixed end; 812. Cutting end; 82. Cutting drive device; 821. Pressing head; 822. Abutting section; 8221. Bending section; 823. Pulling section; 824. Pulling handle; 825. Pressing component;

[0052] 9. Locking drive device; 91. Tubular structure; 911. Cutting channel; 912. Cutting groove; 913. Engaging groove; 92. Movable tube body; 93. Rotary push knob;

[0053] 10. Wire pull drive device; 1010. Wire pull rod; 1011. Wire pull plate. Detailed Implementation

[0054] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0055] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0056] It should be noted that the terms "distal" and "proximal" are used as directional terms, which are commonly used in the field of interventional medical devices. "Distal" refers to the end furthest from the operator during the procedure, while "proximal" refers to the end closest to the operator. Axial direction refers to the direction parallel to the line connecting the center of the distal and proximal ends of the medical device; radial direction refers to the direction perpendicular to the aforementioned axial direction.

[0057] The suturing device in this embodiment of the invention is used to suture patent foramen ovale. Of course, in other embodiments, the device can also be used for edge-to-edge suturing repair of valves, chordae tendineae suturing repair, vascular suturing, etc.

[0058] like Figures 1 to 4 As shown, this embodiment provides a suturing device 100, including a plurality of suture groups 1, a suture locking assembly 2, and a plurality of suturing assemblies 3. The suture locking assembly 2 is provided with a suture locking channel 21 for the suture group 1 to pass through. The plurality of suturing assemblies 3 are distributed around the axial direction of the suture locking channel 21 (i.e., distributed at intervals along the circumferential direction of the suture locking channel 21). The suture group 1 includes a binding end 101 and a free end 102. The binding end 101 is fixedly connected to the suture locking assembly 2. The suturing assembly 3 allows the free end 102 to pass through the tissue wall b and then back through the tissue opening a. The free end 102 that has passed back through the tissue opening a passes through the suture locking channel 21 and extends proximally. The portion of the suture group 1 from the binding end 101 to the suture locking channel 21 forms a suture loop 103. Pulling the free end 102 that has passed through the suture locking channel 21 proximally can reduce the size of the suture loop 103.

[0059] In this process, since the binding end 101 of the suture group 1 is connected to the suture locking assembly 2, the free end 102 of the suture group 1 passes through the tissue wall b and then enters the suture locking channel 21 of the suture locking assembly 2 and extends proximally. The suture group 1 forms a suture loop 103 between the tissue opening a and the tissue wall b. At this time, as long as the free end 102 is pulled proximally, the suture loop 103 will shrink towards the center of the suture locking assembly 2, aligning the axis of the suture locking channel 21 with the center of the tissue opening a. The shrinkage of the suture loop 103 can pull the surrounding tissue wall b towards the tissue opening a and close it, thus completing the suturing of the tissue opening a. Several suture components 3 are distributed circumferentially around the suture locking channel 21, so that several suture loops 103 are also distributed circumferentially around the tissue opening a. At the same time, pulling several free ends 102 in the suture locking channel 21 can simultaneously pull the tissue wall b circumferentially around the tissue opening a towards the center of the tissue opening a for suturing. In other words, by expanding the suturing range of the tissue wall b, the closing effect of the suture of the tissue opening a can be effectively improved.

[0060] It should be noted that the free end 102 can be sutured in two ways. One way is that the free end 102 first passes through the tissue wall b, then passes back through the tissue opening a, and finally enters the locking suture channel 21. The other way is that the free end 102 first exits the tissue opening a, then passes back through the tissue wall b, and finally passes through the locking suture channel 21. Regardless of which suture method is used, as long as the free end 102 is pulled proximally, the suture loop 103 can be reduced. In some embodiments, the free end 102 of these two suture methods can pierce the tissue wall b back and forth multiple times and finally return to the locking suture channel 21. Combining multiple ways of piercing the tissue wall b, such as from the inside out and from the outside in, can improve the suture strength of the tissue wall b.

[0061] like Figures 1 to 3 As shown, the device also includes a tube body 4, which has a receiving cavity 401 and a distal opening 41 communicating with the receiving cavity 401. A suture assembly 2 is located at or near the distal end of the receiving cavity 401. Several suture assemblies 3 are circumferentially distributed around the tube body 4. The free end 102 extends from the binding end 101 through the distal opening 41 to the outside of the tube body 4 and connects with the suture assembly 3. The suture assembly 3 allows the free end 102 to pass through the tissue wall b. The free end 102 passing through the tissue wall b can enter the suture channel 21 through the distal opening 41. The distal end of the tube body 4 is also provided with a guide wire port 411 communicating with the receiving cavity 401 for inserting a guide wire and establishing a guide wire channel.

[0062] In this embodiment, the tube 4 can be inserted into the body from outside through a blood vessel. The tube 4 travels along the blood vessel to the tissue opening a that needs to be sutured. In other embodiments, a window can be opened surgically, and the tube 4 can travel from outside the blood vessel to the tissue opening a.

[0063] like Figures 2 to 4As shown, the suture assembly 3 includes a suture arm 31 disposed on the outer wall of the tube body 4 and a puncture needle 32 movably disposed on the tube body 4. The suture assembly 1 includes a first suture 11 and a second suture 12. One end of the first suture 11 is a binding end 101, and the other end is a first connecting end 111. The first connecting end 111 can extend from the binding end 101 through the distal opening 41 to the outside of the tube body 4 and be detachably connected to the puncture needle 32. One end of the second suture 12 is a free end 102 located on the proximal outer side of the tube body 4, and the other end is a second connecting end 121. The second connecting end 121 can extend from the free end 102 sequentially through the locking suture channel 21 and the distal opening 41 to the outside of the tube body 4 and be detachably connected to the suture arm 31. The puncture needle 32 can pass through the tissue wall b and abut against the suture arm 31, so that the first connecting end 111 and the second connecting end 121 are connected. The puncture needle 32 can be movably disposed outside the tube body 4 or within the receiving cavity 401 of the tube body 4.

[0064] like Figure 5 As shown, the suture assembly 3 also includes a steel sleeve 33 detachably mounted on the suture arm 31. The puncture needle 32 includes a needle bar 321 and a needle tip 322 detachably mounted at the distal end of the needle bar 321. The needle tip 322 is connected to the first connecting end 111, and the steel sleeve 33 is connected to the second connecting end 121. The needle tip 322 can be inserted and fixed with the steel sleeve 33.

[0065] The needle bar 321 can move from the proximal end to the distal end, carrying the needle tip 322 through the tissue wall b, and then is inserted and fixed to the steel sleeve 33 of the suture arm 31. Since the needle tip 322 is connected to the first connecting end 111 and the steel sleeve 33 is connected to the second connecting end 121, the first connecting end 111 and the second connecting end 121 are connected after the needle tip 322 and the steel sleeve 33 are inserted and fixed. The first suture 11 and the second suture 12 form a closed loop to form a suture ring 103. Since the needle tip 322 is detachably located at the distal end of the needle bar 321 and the steel sleeve 33 is detachably connected to the suture arm 31, when the first connecting end 111 and the second connecting end 121 are connected, the needle tip 322 and the steel sleeve 33 are detached from the needle bar 321 and the suture arm 31 respectively, thereby realizing that the first connecting end 111 and the second connecting end 121 are detached from the puncture needle 32 and the suture arm 31 respectively.

[0066] like Figure 6 As shown, the needle 322 includes a conical head 3221 and a connecting portion 3222 located at the proximal end of the conical head 3221. The connecting portion 3222 is engaged with the distal end of the needle bar 321. The conical head 3221 can be inserted into the steel sleeve 33 for fixation. The steel sleeve 33 is engaged with the suture arm 31. When the needle bar 321 is retracted to the proximal end, the connecting portion 3222 can be disengaged from the needle bar 321. The second connecting end 121 can pull the steel sleeve 33 to disengage from the suture arm 31.

[0067] Specifically, when the needle bar 321 pushes the needle tip 322 distally, the conical head 3221 passes through the tissue wall b and is inserted into the steel sleeve 33 for fixation. Since the connecting part 3222 is engaged with the distal end of the needle bar 321, when the needle bar 321 retracts proximally, the connecting part 3222 can disengage from the needle bar 321, thereby achieving a detachable connection between the needle tip 322 and the needle bar 321. Since the second connecting end 121 can pull the steel sleeve 33 away from the suture arm 31, by pulling the free end 102 to drive the second connecting end 121, the pulling force of the second connecting end 121 on the steel sleeve 33 is greater than the engaging force between the steel sleeve 33 and the suture arm 31, thus pulling the steel sleeve 33 out of the suture arm 31, thereby achieving a detachable connection between the steel sleeve 33 and the fixed wall.

[0068] In this embodiment, as Figure 6 As shown, the distal end of the needle bar 321 is provided with a connecting hole 3211. The outer wall of the connecting part 3222 is interference-fitted with the inner wall of the connecting hole 3211. The outer diameter of the connecting part 3222 is larger than the inner diameter of the connecting hole 3211. One of the connecting hole 3211 and the connecting part 3222 is plastic and the other is rigid, or both are plastic. When the needle tip 322 is fixed to the steel sleeve 33, the needle bar 321 is retracted towards the proximal end, and the retraction force is greater than the frictional force between the outer wall of the connecting part 3222 and the inner wall of the connecting hole 3211, the connecting part 3222 can be dislodged from the connecting hole 3211. In some embodiments, the outer diameter of the connecting part 3222 is equal to the inner diameter of the connecting hole 3211. The connecting hole 3211 is also provided with a groove. The groove is annular and extends circumferentially along the connecting hole 3211. The outer peripheral surface of the near end of the connecting part 3222 is provided with an annular protrusion that engages with the groove. The engagement of the annular protrusion with the groove enables the connecting part 3222 to engage with the needle bar 321. When the needle 322 is fixed to the steel sleeve 33, the needle bar 321 retracts towards the near end. When the retraction force is greater than the holding force of the annular protrusion and the groove, the connecting part 3222 can be dislodged from the connecting hole 3211.

[0069] like Figures 7a to 7c As shown, the outer diameter of the conical head 3221 increases from the distal end to the proximal end. The outer diameter of the proximal end of the conical head 3221 is larger than the outer diameter of the connecting part 3222. The steel sleeve 33 is provided with a locking member 331. The locking member 331 forms a locking channel 332 for the conical head 3221 to pass through. The inner diameter of the locking channel 332 is smaller than the outer diameter of the proximal end of the conical head 3221. The distal end of the locking member 331 can abut against the proximal end of the conical head 3221.

[0070] Since the outer diameter of the conical head 3221 increases from the distal end to the proximal end, the outer wall of the conical head 3221 is a conical surface, which helps guide it into the engagement channel 332. The inner diameter of the engagement channel 332 is smaller than the outer diameter of the proximal end of the conical head 3221. After the conical head 3221 enters the engagement channel 332, the distal end of the engagement member 331 can abut against the proximal end of the conical head 3221. The distal end of the engagement member 331 acts as a blockage against the proximal end of the conical head 3221. Therefore, when the needle bar 321 retracts to the proximal end, the conical head 3221 will not be pulled out of the engagement channel 332. The blocking force of the distal end of the engagement member 331 against the proximal end of the conical head 3221 is greater than the frictional force between the outer wall of the connecting part 3222 and the inner wall of the connecting hole 3211.

[0071] In this embodiment, to allow the conical head 3221 to smoothly penetrate the engagement channel 332, one of the engagement member 331 and the proximal portion of the conical head 3221 is plastic and the other is rigid; or both are plastic; or both are rigid but the proximal portion of the engagement member 331 has elastic deformation capability. Specifically, the engagement member 331 consists of several elastic pieces 334 distributed circumferentially inside the steel sleeve 33. One end of the elastic piece 334 is fixedly connected to the inner wall of the steel sleeve 33, and the other end extends distally. The engagement channel 332 is defined between the distal ends of the two sets of elastic pieces 334. The distance between the distal ends of the two sets of elastic pieces 334 is smaller than the inner diameter of the steel sleeve 33 and the outer diameter of the proximal end of the conical head 3221. The elastic pieces 334 are inclined towards the axial direction close to the engagement channel 332, and the elastic pieces 334 can bend and deform relative to the inner wall of the steel sleeve 33. When the conical head 3221... When the conical head 3221 is inserted into the engaging channel 332, the conical surface of the conical head 3221 abuts against the side of the elastic piece 334 near the engaging channel 332. Since the outer diameter of the conical head 3221 increases from the distal end to the proximal end, and the outer diameter of the proximal end of the conical head 3221 is larger than the outer diameter of the engaging channel 332, the conical head 3221 will squeeze the elastic piece 334, causing the proximal end of the elastic piece 334 to undergo elastic deformation, thereby expanding the engaging channel 332. Until the proximal end of the conical head 3221 is inserted into the engaging channel 332, since the outer diameter of the connecting part 3222 is smaller than the outer diameter of the proximal end of the conical head 3221, the elastic piece 334 will return to its original position or clamp the outer wall of the connecting part 3222 under the action of elastic force. At this time, the distal end of the elastic piece 334 abuts against the proximal end surface of the conical head 3221, which can prevent the conical head 3221 from moving towards the proximal end. In this embodiment, the steel sleeve 33 has a insertion hole 333 extending through its proximal and distal ends. The elastic piece 334 is cut from the wall surface of the steel sleeve 33, with its proximal end integrally connected to the steel sleeve 33. The elastic piece 334 is bent inward toward the insertion hole 333 and placed within the insertion hole 333. In some embodiments, adjacent sides of several elastic pieces 334 can be connected to form an entire conical ring.

[0072] Furthermore, in some embodiments, in order to better fix the needle 322 with the engaging member 331, the inner diameter of the engaging channel 332 is smaller than the outer diameter of the connecting portion 3222. When the proximal end of the conical head 3221 enters the engaging channel 332, the elastic piece 334 will clamp the outer wall of the connecting portion 3222 under the action of elastic force. One of the engaging member 331 and the connecting portion 3222 is plastic and the other is rigid; or both are plastic; or as above, both are rigid but the proximal end of the engaging member 331 has elastic deformation capability.

[0073] like Figure 2 and Figure 3 As shown, the puncture needle 32 is movably disposed within the receiving cavity 401. The outer wall of the tube body 4 is provided with a needle outlet channel 42 communicating with the receiving cavity 401. The distal end of the puncture needle 32 can exit through the needle outlet channel 42. The position of the needle outlet channel 42 on the tube body 4 is located on one side of the proximal end of the suture arm 31. The length direction of the needle outlet channel 42 has an angle α with the axial direction of the tube body 4, and the angle α ranges from 0° to 90°. The suture arm 31 is movably disposed on the tube body 4. The suture arm 31 has an initial state and a suture process. In the initial state, the steel sleeve 33 is closest to the radial distance of the central axis of the tube body 4. In the suture process, the suture arm 31 can move relative to the tube body 4 to increase the radial distance of the steel sleeve 33 from the central axis of the tube body 4. In this embodiment, the outer wall of the tube body 4 is provided with a plurality of protruding pillars 402, and the needle outlet channel 42 is coaxially disposed within the protruding pillars 402.

[0074] It should be noted that the needle bar 321 is elastically deformable. The needle bar 321 is parallel to the axis of the tube body 4 within the receiving cavity 401. The needle outlet channel 42 achieves the rotation of the included angle α by limiting the bending of the needle bar 321. After the needle bar 321 passes through the needle outlet channel 42, the length direction of the part of the needle bar 321 that passes through the needle outlet channel 42 is parallel to the length direction of the needle outlet channel 42.

[0075] In order to ensure that the suture arm 31 can pass smoothly through the tissue opening a along with the tube body 4, in the initial state, the distance between the steel sleeve 33 and the tube body 4 in the radial direction is as close as possible to avoid the suture arm 31 touching the tissue opening a and expanding the tissue opening a; during the suturing process, in order to ensure the suture strength, the suture position of the tissue wall b needs to maintain a certain distance from the tissue opening a to avoid the suture line tearing through the tissue wall b to the tissue opening a when the suture ring 103 is tightened. The specific operation process can be as follows: When the suture arm 31 passes through the tissue opening a with the tube body 4 and reaches the distal side of the tissue opening a, the distal end of the puncture needle 32 is pushed out through the needle exit channel 42. Since the length direction of the needle exit channel 42 has an angle α greater than 0 degrees and less than 90 degrees with the axis of the tube body 4, when the outer diameter of the tube body 4 is the same as the size of the tissue opening a, during the process of the puncture needle 32 passing through the needle exit channel 42 to the tissue wall b, the needle tip 322 can move away from the tube body 4 in the radial direction by a certain distance, and the suture arm 31 can also move relative to the tube body 4, increasing the distance of the steel sleeve 33 in the radial direction of the tube body 4, so that after the puncture needle 32 passes through the tissue wall b, the needle tip 322 can be inserted and fixed with the steel sleeve 33.

[0076] It should be noted that, in the initial state, the distance between the distal end of the suture arm 31 and the distal end of the needle exit channel 42 needs to be greater than the distance between the distal end of the suture arm 31 and the proximal end of the suture arm 31. This not only provides enough space for the puncture needle to pass through the tissue wall b, but also avoids the overlap of the needle exit channel 42 and the suture arm 31 on the tube body, which would cause their movements to interfere with each other during the suturing process.

[0077] In this embodiment, as Figure 2 As shown, the tube body 4 has a suture storage port 43 near the end of the needle outlet channel 42, which is connected to the receiving cavity 401. The suture between the first connecting end 111 and the binding end 101 can be stored in the receiving cavity 401 through the suture storage port 43, which plays a role in storing the suture.

[0078] In addition, in this embodiment, the proximal or distal end of the suture arm 31 can be rotatably connected to the tube body 4, and the steel sleeve 33 is provided at the other end of the suture arm 31. In the initial state, the suture arm 31 is attached to the outer wall of the tube body 4. During the suture process, the suture arm 31 rotates relative to the tube body 4, causing the steel sleeve 33 to move away from the tube body 4 in the radial direction.

[0079] like Figure 2 , Figure 5 , Figure 8a , Figure 8b , Figure 8c and Figure 8dAs shown, in the initial state, the length direction of the steel sleeve 33 and the axial direction of the tube body 4 have an angle β. During the suturing process, the suturing arm 31 can be moved until the length direction of the steel sleeve 33 coincides with the length direction of the needle outlet channel 42 (that is, the axial direction of the steel sleeve 33 and the axial direction of the needle outlet channel 42 are coaxial), so that the steel sleeve 33 and the puncture needle 32 can be inserted together.

[0080] Among them, such as Figure 8a As shown, if the suture arm 31 moves in an axial direction perpendicular to the tube body 4, and the steel sleeve 33 is inserted through the suture arm 31, and the angle β between the length direction of the steel sleeve 33 and the axial direction of the tube body 4 is equal to the angle α, then during the suturing process, at any position of the suture arm 31, the angle β between the length direction of the steel sleeve 33 and the axial direction of the tube body 4 will always be equal to the angle α. During the suturing process, when the suture arm 31 moves a certain distance away from extending beyond the tube body 4, the length direction of the steel sleeve 33 can be aligned with the length direction of the needle outlet channel 42. Figure 8b As shown, if the distal end of the suture arm 31 is rotatably connected to the tube body 4, or, as Figure 8c As shown, if the proximal end of the suture arm 31 is rotatably connected to the tube body 4, the steel sleeve 33 is also inserted through the suture arm 31. The angle between the length direction of the steel sleeve 33 and the axial direction of the tube body 4 will change with the rotation of the suture arm 31. During the suturing process, the suture arm 31 changes the angle between the length direction of the steel sleeve 33 and the axial direction of the tube body 4 by rotating. Rotating to a certain angle can make the length direction of the steel sleeve 33 coincide with the length direction of the needle outlet channel 42. If one side of the suture arm 31 is rotatably connected to the tube body 4, such as Figure 8d As shown, the outer wall of the steel sleeve 33 is fixed to the inner or outer surface of the suture arm 31. The angle between the length direction of the steel sleeve 33 and the axial direction of the tube body 4 is always equal to the angle α. During the suturing process, the suture arm 31 rotates by a certain angle so that the length direction of the steel sleeve 33 coincides with the length direction of the needle outlet channel 42.

[0081] In this embodiment, as Figure 2 , Figure 8b and Figure 9 As shown, the distal end of the suture arm 31 is rotatably connected to the tube body 4, and the steel sleeve 33 is located at the proximal end of the suture arm 31. In the initial state, the angle β between the length direction of the steel sleeve 33 and the axial direction of the tube body 4 is greater than the angle α. During the suturing process, the rotation of the distal end of the suture arm 31 relative to the tube body 4 causes the angle β between the length direction of the steel sleeve 33 and the axial direction of the tube body 4 to gradually decrease. When the angle β decreases to be equal to the angle α, the length direction of the steel sleeve 33 coincides with the axial direction of the tube body 4.

[0082] In this embodiment, as Figure 9As shown, the suture arm 31 is provided with a mounting hole 313 for engaging the steel sleeve 33. The suture arm 31 also has a deformation groove 314 connected to the mounting hole 313. The deformation groove 314 is formed by extending from the proximal end face of the suture arm 31 to the distal end. When the steel sleeve 33 disengages from the mounting hole 313, the suture arm 31 rotates back into the mounting groove 44 relative to the tube body 4. At the same time, the suture thread passes through the deformation groove 314, causing the suture thread to disengage from the suture arm 31. Furthermore, when the steel sleeve 33 engages with the mounting hole 313, the deformation groove 314 provides space for deformation of the main body 312, facilitating the installation and disengagement of the steel sleeve 33.

[0083] like Figures 10 to 12 As shown, a suturing device 100 of this embodiment includes a suturing arm 31 comprising a rotating part 311 and a main body part 312 connected to the proximal end of the rotating part 311. The main body part 312 can be initially placed within a mounting groove 44. The side of the main body part 312 away from the receiving cavity 401 is flush with the outer wall of the tube body 4. The rotating part 311 is connected to the side of the main body part 312 away from the receiving cavity 401, and the distal end of the rotating part 311 is rotatably connected to the tube body 4. The rotating part 311 and the main body part 312 have the same curvature as the outer wall of the tube body 4, and the rotating part 311 can fit against the outer wall of the tube body 4. In this embodiment, both a mounting hole 313 and a deformation groove 314 are provided on the main body part 312, and the deformation groove 314 extends from the mounting hole 313 to the proximal end of the main body part 312.

[0084] The outer wall of the tube body 4 is provided with several threading portions 46. The rotating portion 311 is arranged between adjacent threading portions 46. Both the threading portions 46 and the rotating portion 311 are provided with threading channels 403. A rotating ring 48 is provided in the threading channels 403 of the threading portions 46 and the rotating portion 311. The curvature of the threading channel 403 is the same as the curvature of the rotating ring 48. The rotating ring 48 is coaxially arranged with the tube body 4. When the rotating portion 311 rotates relative to the tube body 4, the rotating ring 48 can be elastically deformed.

[0085] In order to reduce the height of the sewing arm 31 protruding from the outer wall of the tube body 4 in the initial state, the main body 312 can be placed in the mounting groove 44, and the rotating part 311 is designed to have the same curvature as the outer wall of the tube body 4. The rotating part 311 can fit against the outer wall of the tube body 4. In order to realize that the rotating part 311 can rotate relative to the tube body 4, the curvature of the threading channel 403 is the same as the curvature of the rotating ring 48. When the rotating part 311 rotates relative to the tube body 4 on a fixed axis, the threading channel 403 will not be coaxial with the rotating ring 48. Only when the rotating ring 48 undergoes elastic deformation will it not affect the rotation of the rotating part 311 relative to the tube body 4.

[0086] like Figure 1 , Figure 9 and Figure 13As shown, it also includes a handle 6 and a suture drive device 5 disposed on the handle 6. The handle 6 is disposed near the end of the tube body 4. The suture drive device 5 is used to drive the suture arm 31 to rotate. The suture drive device 5 includes a first pull wire 51, a second pull wire 52, and a winding assembly 53. The winding assembly 53 is disposed inside the handle 6. The first pull wire 51 and the second pull wire 52 are movably disposed in the receiving cavity 401 of the tube body 4. One end of the first pull wire 51 and the second pull wire 52 are connected to the winding assembly 53. The other end of the first pull wire 51 is connected to the side of the suture arm 31 near the tube body 4 to pull the suture arm 31 to maintain it in the initial state. The other end of the first pull wire 51 is connected to the side of the suture arm 31 away from the tube body 4 to pull the suture arm 31 to maintain it in the suture process.

[0087] In this embodiment, as Figure 9 As shown, the tube body 4 is provided with a mounting groove 44 that connects to the receiving cavity 401. The suture arm 31 is placed in the mounting groove 44 in the initial state. The distal end of the first pull wire 51 passes through the mounting groove 44 and is connected to the side of the suture arm 31 near the tube body 4 (i.e., the inner surface side of the suture arm 31). The tube body 4 is provided with a threading port 45 that connects to the receiving cavity 401 on the side of the distal end of the suture arm 31. The distal end of the second pull wire 52 passes out of the tube body 4 from the threading port 45 and is connected to the side of the suture arm 31 away from the tube body 4 (i.e., the outer surface side of the suture arm 31).

[0088] like Figure 13 As shown, the winding assembly 53 includes a winding post 531 rotatably mounted on the handle 6, handles 532 on both sides of the winding post 531, and a winding drum 533 coaxially mounted on the winding post 531. The handles 532 are located outside the handle 6, and the winding drum 533 is located inside the handle 6. The axial direction of the winding post 531 is perpendicular to the axial direction of the tube 4. One end of the first pull wire 51 and the second pull wire 52 are both wound on the winding drum 533, and the winding directions of the first pull wire 51 and the second pull wire 52 on the winding drum 533 are opposite. Therefore, when the winding drum 533 rotates in any direction, it will unwind the other wire while winding either the first pull wire 51 or the second pull wire 52. For example, when the winding drum 533 rotates in a certain direction and the first pull line 51 is wound up, the first pull line 51 will pull the sewing arm 31 to the side near the tube body 4, tightening the sewing arm 31 and keeping it in the mounting groove 44, while the second pull line 52 will not exert a force on the side of the sewing arm 31 away from the tube body 4; when the winding drum 533 rotates in the opposite direction and the second pull line 52 is wound up, the second pull line 52 will pull the sewing arm 31 to the side away from the tube body 4, causing the sewing arm 31 to rotate relative to the tube body 4 out of the mounting groove 44, and the sewing arm 31 will simultaneously pull the first pull line 51 that has been released through the mounting groove 44 and out of the tube body 4.

[0089] like Figure 1 , Figure 14 and Figure 15As shown, it also includes a puncture drive device 7 for driving the axial movement of the needle bar 321. The puncture drive device 7 includes a handle 71 slidably disposed on the handle 6. The handle 71 is sleeved on the outer wall of the handle 6. The inner wall of the handle 71 is provided with a plurality of sliding blocks 72 in a circumferential direction. The handle 6 is provided with a plurality of sliding grooves 61 corresponding to the handle. The sliding blocks 72 pass through the sliding grooves 61 and can reciprocate along the proximal and distal directions within the sliding grooves 61. A push block 73 is provided at the end of the sliding block 72 away from the handle 71. The push block 73 is disposed inside the handle 6. The distal end of the push block 73 is fixedly connected to the proximal end of the needle bar 321. The movement of the needle bar 321 relative to the tube body 4 can be controlled by pushing the handle 71 towards the proximal or distal end. In the initial state, the handle 71 is located at the proximal end relative to the handle 6, at which time the needle tip 322 is located at the needle exit channel 42. During the suturing process, pushing the handle 71 towards the distal end will push the needle bar 321, and the needle tip 322 will be pushed out of the needle exit channel 42 by the needle bar 321. When the handle 71 is pushed to the distal end, the needle tip 322 is inserted and fixed with the steel sleeve 33.

[0090] like Figure 1 As shown, it also includes a pull-thread drive device 10 for tightening the suture ring 103. The pull-thread drive device 10 includes a pull-thread rod 1010 slidably disposed on the handle 6 and a pull-thread piece 1011 disposed at the proximal end of the pull-thread rod. The distal end of the pull-thread rod 1010 can pass through the proximal end of the handle 6. The pull-thread rod 1010 passing through the proximal end of the handle 6 is connected to the pull-thread piece 1011. The proximal end of the free end 102 is fixedly connected to the distal end of the pull-thread rod 1010. Pulling the pull-thread piece 1011 towards the proximal end causes the pull-thread rod 1010 to slide towards the proximal end relative to the tube body 4, thereby pulling the free end 102 towards the proximal end, thereby reducing the size of the suture ring 103.

[0091] The usage process of the suturing device in this embodiment is as follows:

[0092] In the initial state, such as Figure 16a As shown, the tube body 4 is pushed to the distal end through the tissue opening a, so that the distal opening 41 is located on the distal side of the tissue opening a, the suture arm 31 is also located on the distal side of the tissue opening a, the puncture needle 32 is located on the proximal side of the tissue opening a, the suture arm 31 is placed in the mounting groove 44, and the needle tip 322 is located at the needle exit channel 42.

[0093] For ease of explanation, the following description uses a single suture loop 103 as an example during the suturing process. In actual operation, a locking assembly 2 will lock multiple suture loops 103 to suture the tissue opening a. Figures 16a to 16bAs shown, first turn the handle 532 so that the second pull line 52 pulls the suture arm 31 away from the tube body 4. The suture arm 31 rotates out of the mounting groove 44 relative to the tube body 4. Adjust the angle of rotation of the suture arm 31 so that the length direction of the steel sleeve 33 coincides with the axis of the needle outlet channel 42. Then pull the tube body 4 towards the proximal end so that the steel sleeve 33 abuts against the distal side of the tissue wall b.

[0094] Then, the handle 71 is pushed from the proximal end to the distal end to move relative to the handle 6. The pushing block 73 pushes the needle bar 321 to move distally, and the needle tip 322 is pushed by the needle bar 321 to pass through the needle exit channel 42. The needle tip 322, carrying the first connecting end 111 of the first suture 11, passes through the tissue wall b. Then, the handle 71 is pushed distally until the needle tip 322 is inserted into the steel sleeve 33 and fixed. Since the steel sleeve 33 is fixed to the second connecting end 121 of the second suture 12, the first connecting end 111 of the first suture 11 and the second connecting end 121 of the second suture 12 are indirectly fixedly connected, and the first suture 11 and the second suture 12 form a closed loop to form a suture ring 103. Figure 16c As shown, the handle 71 is then pushed proximally to retract the needle bar 321, disengaging the needle tip 322 from the needle bar 321. Once the needle bar 321 retracts from the needle outlet channel 42 into the receiving cavity 401 of the tube body 4, as... Figure 16d As shown, pulling the pull tab 1011 towards the proximal end causes the pull rod to slide towards the proximal end relative to the tube body 4, thereby pulling the free end 102 towards the proximal end. The moving free end 102 pulls the steel sleeve 33 at the other end to disengage from the mounting hole 313 of the suture arm 31. The first suture 11 then passes into the mounting hole 313. At this time, the tube body 4 is pushed towards the distal end to move the suture arm 31 away from the tissue wall b, so as to avoid the suture arm 31 being blocked by the tissue wall b when it retracts. By rotating the handle 532 in the opposite direction, the first pull line 51 pulls the suture arm 31 to the side close to the tube body 4. The suture arm 31 rotates back into the mounting groove 44 relative to the tube body 4. At the same time, the first suture 11 in the mounting hole 313 disengages from the suture arm 31 through the deformation groove 314.

[0095] Continue pulling the suture piece 1011 proximally. The needle 322, along with the steel sleeve 33, passes through the locking suture channel 21 from the distal opening 41 of the tube body 4. During this process, the suture loop 103 continuously shrinks. Because the tube body 4 is inserted into the tissue opening a at this time, the suture loop 103 cannot shrink completely to its minimum size. When it is no longer possible to shrink the suture loop 103 by pulling the suture piece 1011 proximally, as... Figure 16e As shown, the tube body 4 is then pulled proximally out of the tissue opening a, so that the distal opening 41 is located on the proximal side of the tissue opening a. Then, the pull suture piece 1011 can be pulled proximally to reduce the suture ring 103. When the tissue opening a is locked and closed by the suture ring 103, the locking suture assembly 2 is used to fix multiple suture rings 103 and cut the suture. The suturing device can then be withdrawn from the body to complete the suturing of the tissue opening a.

[0096] like Figure 1 , Figure 3 , Figure 4 and Figure 17 As shown, it also includes a locking drive device 9, which is movably disposed on the handle 6. The thread-locking assembly 2 includes a fixing member 22 and a locking member 23 disposed near the proximal end of the fixing member 22. The fixing member 22 is detachably disposed in the receiving cavity 401 near the distal opening 41. The fixing member 22 and the locking member 23 can pass through the distal opening 41. The locking member 23 is detachably connected to the locking drive device 9. The fixing member 22 and the locking member 23 respectively have an installation channel 221 and a thread-locking channel 21 passing through their proximal and distal ends. The locking drive device 9 can install the locking member 23 into the installation channel 221 to lock the thread assembly 1. In this embodiment, the installation channel 221 is part of the thread-locking channel 21. The binding end 101 of the first suture 11 is fixedly connected to the fixing member 22. In the initial state, the second suture 12 can be movably passed through the installation channel 221 and the thread-locking channel 21.

[0097] In the initial state, the second suture 12 is movably inserted into the installation channel 221 and the locking channel 21. The suturing device has a locking process. During the locking process, the locking member 23 is installed into the installation channel 221 to lock the suture group 1, realizing the integrated operation of suturing and locking on the same device. There is no need to reinsert the device into the human body to lock the suture, which effectively improves the efficiency of locking the suture.

[0098] It should be noted that the installation of the fastener 22 and the locking member 23 can be configured in various ways to achieve the locking of the suture. For example, in some embodiments, the fastener 22 is made of rigid material and the locking member 23 is made of elastic material. After the locking member 23 is inserted into the installation channel 221 of the fastener 22, the locking channel 21 is narrowed due to radial compression, thereby locking the suture in the locking channel 21. Alternatively, the locking member 23 includes several circumferentially distributed elastic sheets, which have an expanded state and a compressed state. Before the fastener 22 is installed, the elastic sheets of the locking member 23 are in an expanded state. The outer diameter of the locking member 23 in the expanded state is larger than the inner diameter of the installation channel 221. The locking channel 21 is defined by the center around which the elastic sheets surround. When the locking member 23 is inserted into the installation channel 221 of the fastener 22, the inner wall of the fastener 22 will radially compress the elastic sheets. The elastic sheets are compressed and bent and deformed in the center direction, narrowing the locking channel 21, thereby locking the suture.

[0099] like Figure 17 and Figure 18As shown, the locking member 23 includes a locking ring 231 coaxially arranged with the locking thread channel 21 and a locking head 232 located at the distal end of the locking ring 231. The locking head 232 includes a plurality of locking pieces 2321 evenly distributed circumferentially on the locking ring 231. There is a gap between adjacent locking pieces 2321. External threads 2322 are distributed on the side of the plurality of locking pieces 2321 away from the locking thread channel 21. The external threads 2322 of adjacent locking pieces 2321 can be connected to each other. The fixing member 22 has an internal thread in the installation channel 221 that can cooperate with the external threads 2322. The inner diameter of the installation channel 221 is smaller than the outer diameter of the locking head 232. The locking head 232 can be threadedly connected to the installation channel 221 so that the plurality of locking pieces 2321 can clamp the sewing thread together.

[0100] Among them, several locking pieces 2321 evenly distributed circumferentially on the locking ring 231 together form a locking head 232. An external thread 2322 is provided on the side of the locking piece 2321 away from the locking wire channel 21. Since there is a gap between adjacent locking pieces 2321, and the external threads 2322 of adjacent locking pieces 2321 can connect with each other, correspondingly, an internal thread that can mate with the external thread 2322 is provided in the mounting channel 221 of the fixing member 22. Since the inner diameter of the mounting channel 221 is smaller than the locking wire channel 2321, the locking head 232 is designed to be compatible with the locking head 2322. The outer diameter of the tightening head 232 is such that during the process of screwing the tubular structure 91 into the installation channel 221, the inner wall of the fastener 22 will radially compress the part of the tubular structure 91 that is screwed in. That is, the side of the locking piece 2321 away from the locking channel 21 will be squeezed by the inner wall of the fastener 22. The axially distributed locking pieces 2321 will gather together in the installation channel 221, and the locking channel 21 will also narrow due to the proximity of the locking pieces 2321, thereby achieving the effect of locking the suture.

[0101] It should be noted that when several locking pieces 2321 come together to abut against each other between adjacent locking pieces 2321, or when the locking head 232 is screwed to the point where it can no longer be screwed into the installation channel 221, it can be regarded as the locking channel 21 narrowing to its minimum, but the locking channel 21 will not narrow to the point of being closed, so as to avoid the locking channel 21 from pinching the sewing thread.

[0102] like Figure 17 As shown, the outer diameter of the locking head 232 decreases from the proximal end to the distal end, and the radial dimension of the mounting channel 221 is greater than the outer diameter of the distal end of the locking head 232 and smaller than the outer diameter of the proximal end of the locking head 232.

[0103] Specifically, the outer diameter of the locking head 232 decreases from the proximal end to the distal end, and the radial dimension of the mounting channel 221 is larger than the outer diameter of the distal end of the locking head 232, which facilitates the insertion of the distal end of the locking head 232 into the mounting channel 221 and serves as a guide. Meanwhile, the radial dimension of the mounting channel 221 is smaller than the outer diameter of the proximal end of the locking head 232, which increases the squeezing force of the inner wall of the fixing member 22 on the outer wall of the locking piece 2321 as the locking head 232 is screwed in.

[0104] like Figure 18 As shown, the locking piece 2321 has a clamping block 2323 at its far end. The side of the clamping block 2323 near the locking channel 21 is an arc surface 2324. When adjacent clamping blocks 2323 abut against each other, the arc surfaces 2324 of several clamping blocks 2323 together define the locking channel 21.

[0105] Among them, the clamping block 2323 is provided with an arc surface 2324 on the side near the suture channel 21. When adjacent clamping blocks 2323 abut against each other, the arc surfaces 2324 of several clamping blocks 2323 together define the suture channel 21, so that the suture channel 21 is narrowed to the minimum to lock the suture. The arc surface 2324 can better gather the suture towards the center, and at the same time play a role in protecting the suture.

[0106] like Figure 19 As shown, the outer diameter of the distal end of the fastener 22 is smaller than that of the proximal end. The outer wall of the fastener 22 is a tapered surface. The tube body 4 is provided with a mounting platform 49 in the receiving cavity 401. The fastener 22 can be engaged with the inner wall of the mounting platform 49 through the tapered surface. The inner wall of the mounting platform 49 can fit against the tapered surface. The fastener 22 can pass through the distal opening 41 through the mounting platform 49.

[0107] In this design, because the outer wall of the fastener 22 is conical and the outer diameter of the distal end of the fastener 22 is smaller than that of the proximal end, and the inner wall of the mounting platform 49 can fit against the conical surface, when the fastener 22 is engaged with the inner wall of the mounting platform 49 through the conical surface, the inner wall of the mounting platform 49 will prevent the fastener 22 from moving further to the distal end by blocking the conical surface, ensuring that the fastener 22 remains stationary during the installation of the locking member 23 into the mounting channel 221 of the fastener 22. To allow the fastener 22 and locking member 23 to pass through the distal opening 41 of the mounting platform 49 after installation and fixation, the mounting platform 49 can be made of an elastic material, and the fastener 22 can be made of a rigid material. During the retraction process, the tube 4 directly exits to the proximal end, and the outer wall of the fastener 22 compresses the inner wall of the mounting platform 49 until it deforms, causing the inner diameter of the distal end of the mounting platform 49 to expand to be equal to the outer diameter of the proximal end of the fastener 22, thus giving the fastener 22 a... Sufficient space is provided for the fastener 22 to pass through the inner wall of the mounting platform 49, allowing it to exit through the distal opening 41. Alternatively, the mounting platform 49 may be made of rigid material, the outer wall of the fastener 22 may be made of elastic material, and the inner wall of the fastener 22 may also be made of rigid material. In the same way, during the retraction process, the tube 4 exits directly to the proximal end, and the inner wall of the mounting platform 49 compresses the outer wall of the fastener 22 until it deforms, compressing the outer diameter of the proximal end of the fastener 22 to be equal to the inner diameter of the distal end of the mounting platform 49. This provides sufficient space for the fastener 22 to pass through the inner wall of the mounting platform 49, allowing it to exit through the distal opening 41. The inner wall of the rigid material fastener 22 can ensure sufficient rigidity to compress the locking piece 2321. The inner wall of the rigid material fastener 22 can be fixed to the outer wall of the elastic material fastener 22 by adhesive bonding.

[0108] Furthermore, in this embodiment, a rotation-restricting structure is provided between the inner wall of the mounting platform 49 and the outer wall of the fixing member 22 to prevent the fixing member 22 from rotating when the locking head 232 is screwed into the mounting channel 221. The rotation-restricting structure can be a limiting groove provided axially on one of the inner wall of the mounting platform 49 and the outer wall of the fixing member 22, and a limiting block provided on the other. The limiting block can only slide axially along the mounting channel 221 within the limiting groove.

[0109] like Figure 1 and Figure 20 As shown, the locking drive device 9 includes a tubular structure 91, a movable tube 92 connected to the proximal end of the tubular structure 91, and a rotary push button 93 located at the proximal end of the movable tube 92. The tubular structure 91 is movably disposed within the receiving cavity 401. The movable tube 92 is movably connected to the handle 6. The proximal end of the movable tube 92 extends out of the proximal end of the handle 6. The movable tube 92 extending out of the proximal end of the handle 6 is connected to the rotary push button 93. The distal end of the tubular structure 91 is detachably connected to the proximal end of the locking ring 231. The rotary push button 93 can control the axial movement or rotation of the tubular structure 91 within the receiving cavity 401.

[0110] In the initial state, there is an axial movement distance between the distal end of the rotary push button 93 and the proximal end of the handle 6. This distance is greater than the axial distance between the proximal end of the locking head 232 and the distal end of the fixing member 22 in the initial state. The pull rod 1010 of the proximal end of the second suture 12 passes through the proximal end of the rotary push button 93, and the pull rod 1010 is slidably connected to the rotary push button 93. During the locking process, the rotary push button 93 is pushed towards the distal end, so that the distal end of the locking head 232 is inserted into the proximal end of the mounting channel 221 of the fixing member 22. Since the radial dimension of the mounting channel 221 is larger than that of the distal end of the locking head 232, the locking head 232 is engaged in the locking process. The outer diameter is smaller than the outer diameter of the near end of the locking head 232. When the rotary push knob 93 can no longer be pushed to the far end, it is considered that the far end of the locking head 232 has been inserted into the near end of the mounting channel 221. Then, rotate the rotary push knob 93 to screw the external thread 2322 of the locking piece 2321 into the mounting channel 221 and engage with the internal thread. During this process, it is necessary to rotate the rotary push knob 93 and push the rotary push knob 93 at the same time to facilitate the locking head 232 to be screwed in. When the rotary push knob 93 can no longer be rotated, it is considered that the locking head 232 has been screwed into the farthest end of the mounting channel 221, and the locking process is completed.

[0111] like Figure 18 and Figure 22 As shown, the locking ring 231 has a plurality of engaging posts 233 circumferentially arranged at its proximal end, and the tubular structure 91 has a plurality of engaging grooves 913 circumferentially arranged at its distal end, with the engaging posts 233 engaging and connected within the engaging grooves 913.

[0112] In this embodiment, the locking post 233 is interference-fitted in the locking groove 913, the outer diameter of the locking post 233 is larger than the inner diameter of the locking groove 913, and one of the locking groove 913 and the locking post 233 is plastic and the other is rigid, or both are plastic.

[0113] The suture device 100 provided in this embodiment also includes a suture tangent assembly 8, such as... Figure 1 , Figure 3 , Figure 4 , Figure 21 and Figure 22 As shown, the suture cutting assembly 8 is located on the proximal side of the suture locking assembly 2 within the receiving cavity 401. The suture cutting assembly 8 includes a cutting arm 81 and a cutting drive device 82 located on the tubular structure 91. The tubular structure 91 has a cutting channel 911 for the suture to pass through. The cutting arm 81 is located within the cutting channel 911. The two ends of the cutting arm 81 are a fixed end 811 and a cutting end 812, respectively. The fixed end 811 is fixed to the inner wall of the tubular structure 91. The cutting drive device 82 can drive the cutting end 812 to move toward the axis of the cutting channel 911, thereby cutting the suture within the cutting channel 911.

[0114] In this process, the cutting end 812 of the cutting arm 81 moves toward the axis closer to the cutting channel 911, and the suture assembly 8 has a suture cutting process. From the initial state to the locking process, the suture is passed through the cutting channel 911, and the cutting end 812 does not contact the suture. During the suture cutting process, the cutting drive device 82 can make the cutting end 812 of the cutting arm 81 approach the suture and abut against the suture, thereby cutting the suture in the cutting channel 911.

[0115] When only one cutting arm 81 is provided (for example, when it is provided on the upper side wall of the tubular structure 91), the length of the cutting arm 81 is greater than the diameter of the cutting channel 911. From the initial state to the locking process, the cutting end 812 does not contact the suture. During the cutting process, the suture is pulled proximally to make the suture taut within the cutting channel 911. The cutting end 812 of the cutting arm 81 approaches and abuts against the suture, cutting the suture in the taut and suspended state. Alternatively, after the cutting end 812 of the cutting arm 81 contacts the suture, the cutting end 812 continues to move until it contacts the inner wall on the opposite side of the cutting channel 911, thereby cutting the suture.

[0116] In this embodiment, two cutting arms 81 are provided. The length of the cutting arm 81 is greater than the radius of the cutting channel 911. The two cutting arms 81 are symmetrically arranged on both radial sides of the cutting channel 911. There is a gap between the cutting end 812 and the axis of the cutting channel 911. From the initial state to the locking process, the projected length of the cutting arm 81 in the axial direction of the cutting channel 911 is less than the radius of the cutting channel 911. During the suture cutting process, the cutting drive device 82 brings the cutting ends 812 of the two cutting arms 81 close to the suture. The cutting ends 812 of the two cutting arms 81 abut against each other and cut the suture together.

[0117] In other embodiments, three or more cutting arms 81 may be provided (e.g., three). When the cutting ends 812 of the three cutting arms 81 are close to the suture line, the adjacent cutting ends 812 are stacked together so that the three cutting ends 812 surround a triangular cutting opening. When the three cutting ends 812 are close to the suture line together, the triangular cutting opening is reduced, thereby cutting the suture line.

[0118] In this embodiment, during the retraction process of the suture assembly 8, after the cutting arm 81 cuts the suture, the tube 4 exits from the distal end to the proximal end, and at the same time, the locking member 23 disengages from the locking drive device 9, and the fixing member 22 and the locking member 23 together pass through the distal opening 41.

[0119] In some embodiments, the cutting drive device 82 can be configured in various ways to bring the cutting end 812 of the cutting arm 81 closer to the suture line. For example, an axially movable push rod is provided in the cutting channel 911. The proximal end of the push rod is slidably connected to the handle 6, and a roller is rotatably provided at the distal end of the push rod. The roller is pressed against the inner wall of the cutting arm 81 and the cutting channel 911. During the cutting process, the push rod is pushed to the distal end, causing the roller to squeeze the cutting arm 81. The cutting arm 81 bends under the squeezing action of the roller, thereby bringing the cutting end 812 closer to the suture line.

[0120] like Figure 1 , Figures 21 to 23 As shown, the side wall of the tubular structure 91 is provided with a cutting groove 912 that connects to the cutting channel 911. The fixed end 811 is fixedly connected to the distal end of the cutting groove 912, and the cutting end 812 is located on the proximal side of the fixed end 811. The cutting drive device 82 includes a pressing head 821 and a pressing member 825 connected to the proximal end of the pressing head 821. The pressing member 825 is movably disposed in the cutting channel 911. The proximal end of the pressing member 825 extends toward the proximal end of the cutting channel 911, and the distal end of the pressing member 825 passes through the cutting groove 912 and is connected to the pressing head 821. The pressing head 821 can fit against the outer side of the cutting arm 81. Pulling the pressing member 825 toward the proximal end can cause the pressing head 821 to press the outer side of the cutting arm 81 in a radially inward direction toward the locking channel 21.

[0121] The pressing member 825 is straight when not under force. Since the pressing member 825 is movably disposed within the cutting channel 911, and its distal end extends through the cutting groove 912 and connects to the pressing head 821, the pressing member 825 undergoes elastic deformation by abutting against the outer side of the cutting arm 81, bending out of the cutting groove 912 from within the cutting channel 911. From the initial state to the locking process, if the distal end of the pressing member 825 is radially or... When the axial direction is far away, the pressure head 821 has not yet come into contact with the outside of the cutting arm 81. During the cutting process, when the pressure member 825 is pulled towards the proximal end, the pressure member 825 will slide relative to the proximal end of the cutting groove 912. The pressure head 821 is not only subjected to the elastic deformation force of the pressure member 825, but also to the pushing force of the proximal end of the cutting groove 912 on the pressure member 825, forming a force that causes the pressure head 821 to move radially inward toward the locking channel 21, thereby squeezing the outside of the cutting arm 81.

[0122] In this embodiment, the outer diameter of the pressing head 821 is larger than the outer diameter of the pressing member 825. During the initial state to the locking process, the distance between the cutting end 812 and the proximal end of the cutting groove 912 is at least the outer diameter of the pressing member 825. During the tangent process, the outer diameter of the pressing head 821 is greater than the maximum distance between the cutting end 812 and the proximal end of the cutting groove 912.

[0123] like Figure 24 and Figure 25 As shown, the pressing member 825 includes an abutting section 822 and a pulling section 823 connected to the proximal end of the abutting section 822. The abutting section 822 is movably disposed in the cutting groove 912, and the pulling section 823 is movably disposed in the cutting channel 911. Pulling the pulling section 823 towards the proximal end can cause the abutting section 822 to slide relative to the proximal end of the cutting groove 912, thereby causing the pressing head 821 to press the outer side of the cutting arm 81 in a radially inward direction toward the locking channel 21.

[0124] Furthermore, in this embodiment, such as Figure 1 and Figure 20 As shown, the proximal end of the pull section 823 extends out of the proximal end of the tubular structure 91 and through the side wall of the rotary push button 93. The proximal end of the pull section 823 is connected to the pull handle 824. When the rotary push button 93 is pushed or rotated, the cutting drive device 82 can be driven to move synchronously with the tubular structure 91.

[0125] In this embodiment, as Figure 24 As shown, the abutment section 822 can be a straight structure, with an angle γ between the length direction of the straight abutment section and the length direction of the cutting channel 911. The angle γ ranges from 0° to 90°. The length direction of the pull tube 823 is parallel to the length direction of the cutting channel 911. Alternatively, as shown... Figure 25 As shown, the abutment section 822 can also be a curved structure. The abutment section 822 is provided with a curved part 8221 that can abut against the proximal end of the cutting groove 912. The arc of the curved part 8221 protrudes towards the proximal end of the cutting groove 912. The length direction of the pulling section 823 is parallel to the length direction of the cutting channel 911. The curved structure of the abutment section 822 allows the pressing head 821 to fit more closely with the cutting arm 81, thereby increasing the force of the pressing head 821 on the cutting arm 81.

[0126] In this design, both the straight-shaped abutment section 822 and the curved portion 8221 of the abutment section 822 serve a guiding function. During the tangential process, pulling the pull handle 824 towards the proximal end causes the abutment section 822 to abut against the proximal end of the cutting groove 912. The surface of the abutment section 822 slides and rubs against the proximal end of the cutting groove 912. Under the guiding action of the abutment section 822, there is a tendency to pull the abutment section 822 through the cutting groove 912 into the cutting channel 911, meaning that the abutment section 822 moves towards the axis of the cutting channel 911. Since the pressure head 821 is located in the tubular structure... Outside of structure 91, if the pressing head 821 is to move proximally along with the abutting section 822 and simultaneously move towards the axis of the cutting channel 911, the pressing head 821 will abut against the outside of the cutting arm 81. As the pulling tube 823 continues to pull proximally, the pressing head 821 will continuously squeeze the cutting arm 81, causing the cutting arm 81 to bend until the cutting end 812 of the cutting arm 81 cuts the suture. Since the outer diameter of the pressing head 821 is greater than the maximum distance between the cutting end 812 and the proximity of the cutting groove 912, the pressing head 821 is prevented from entering the cutting channel 911 through the cutting groove 912.

[0127] like Figure 26 As shown, several sets of abutment sections 822 are provided, and the proximal ends of each set of abutment sections 822 are connected to the distal end of a pull tube 823. Several sets of cutting grooves 912 are correspondingly provided, and the cutting grooves 912 are circumferentially distributed in the tubular structure 91. Each abutment section 822 is movably inserted into a cutting groove 912. By circumferentially distributing several sets of abutment sections 822 to the distal end of the same pull tube 823, only the proximal end of the pull tube 823 needs to be pulled to simultaneously pull several sets of abutment sections 822.

[0128] In this embodiment, the fixed end 811 is integrally connected to the tubular structure 91, the cutting arm 81 is integrally cut and formed on the outer wall of the tubular structure 91, the cutting end 812 is ground into a blade, and the cutting arm 81 is bent so that the cutting end 812 is close to the axis of the cutting channel 911, so that the cutting arm 81 is kept in a bent state.

[0129] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0130] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A tangent assembly, characterized in that, The device includes a tubular structure (91), a cutting arm (81), and a cutting drive device (82). The tubular structure (91) has a cutting channel (911) for inserting sutures. The cutting arm (81) includes a fixed end (811) and a cutting end (812) opposite to each other. The fixed end (811) is fixed to the tubular structure (91). The cutting drive device (82) can drive the cutting end (812) to move toward the axis of the cutting channel (911), thereby cutting the sutures in the cutting channel (911).

2. The tangent assembly according to claim 1, characterized in that: The tubular structure (91) has a cutting groove (912) on its sidewall that communicates with the cutting channel (911). The fixed end (811) is fixedly connected to the distal end of the cutting groove (912), and the cutting end (812) is located on the proximal side of the fixed end (811). The cutting drive device (82) includes a pressing head (821) and a pressing member (825) connected to the proximal end of the pressing head (821). The pressing member (825) is movably disposed in the cutting channel (911). 11) Inside, the proximal end of the pressing member (825) extends toward the proximal end of the cutting channel (911), and the distal end of the pressing member (825) passes through the cutting groove (912) and is connected to the pressing head (821); the pressing head (821) can fit against the outer side of the cutting arm (81), and pulling the pressing member (825) toward the proximal end can cause the pressing head (821) to press the outer side of the cutting arm (81) in a radially inward direction toward the cutting channel (911).

3. The tangent assembly according to claim 2, characterized in that: The pressing member (825) includes an abutting section (822) and a pulling section (823) connected to the proximal end of the abutting section (822). The abutting section (822) is movably disposed within the cutting groove (912), and the pulling section (823) is movably disposed within the cutting channel (911). Pulling the pulling section (823) towards the proximal end allows the abutting section (822) to slide relative to the proximal end of the cutting groove (912), thereby causing the pressing head (821) to press the outer side of the cutting arm (81) in a radially inward direction towards the cutting channel (911).

4. The tangent assembly according to claim 3, characterized in that: The abutting section (822) is a straight structure. The length direction of the straight abutting section (822) is provided with an angle γ between the length direction of the abutting section (822) and the length direction of the cutting channel (911). The angle γ is in the range of 0° < γ < 90°. The length direction of the pumping tube (823) is parallel to the length direction of the cutting channel (911).

5. The tangent assembly according to claim 3, characterized in that: The abutting section (822) has a curved structure and is provided with a curved part (8221) that can abut against the proximal end of the cutting groove (912). The arc of the curved part (8221) protrudes towards the proximal end of the cutting groove (912). The length direction of the pulling section (823) is parallel to the length direction of the cutting channel (911).

6. The tangent assembly according to claim 3, characterized in that: The abutting section (822) is provided in several groups, and the proximal ends of the several groups of abutting sections (822) are all connected to the distal end of the actuating tube (823). The cutting groove (912) is provided in several groups, and the several cutting grooves (912) are circumferentially distributed in the tubular structure (91). Each abutting section (822) is movably inserted into a cutting groove (912).

7. The tangent assembly according to claim 2, characterized in that: The outer diameter of the pressure head (821) is greater than the maximum distance from the cutting end (812) to the proximal end of the cutting groove (912).

8. The tangent assembly according to claim 1, characterized in that: It also includes a suture assembly (2), which includes a locking member (23) detachably disposed at the distal end of the tubular structure (91) and a fixing member (22) disposed at the distal end of the locking member (23). The fixing member (22) and the locking member (23) respectively have an installation channel (221) and a suture channel (21) penetrating their proximal and distal ends. The suture is threaded through the installation channel (221) and the suture channel (21). The tubular structure (91) allows the locking member (23) to be installed into the installation channel (221) so that the inner diameter of the suture channel (21) contracts to lock the suture.

9. The tangent assembly according to claim 8, characterized in that: It also includes a tube body (4), which has a receiving cavity (401) inside. The far end of the tube body (4) has a far end opening (41) that communicates with the receiving cavity (401). The fixing member (22) is detachably disposed in the receiving cavity (401) near the far end opening (41). The fixing member (22) and the locking member (23) can pass through the far end opening (41). The tubular structure (91) is movably disposed in the receiving cavity (401).

10. A suturing device, characterized in that: Includes the tangent assembly as described in any one of claims 1-9.

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