Blood vessel stitching instrument

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a blood vessel stitching instrument. In order to solve the problems that the operation cost is high and the operation process is complex because the large-diameter puncture opening can be closed by multiple operations or using multiple stitching instruments, the large-diameter puncture opening comprises a handle and an outer tube, the outer tube is connected with the handle, a needle head is arranged at the end of the outer tube, and an anchoring mechanism comprises a plurality of anchor rods capable of being unfolded and folded in the radial direction; the unfolding driving mechanism is used for driving the multiple anchor rods to be converted into the unfolding state from the folded state. The puncture assembly comprises a plurality of puncture needles capable of puncturing vascular tissues to be inserted into the corresponding anchor rods; two ends of each suture line are respectively arranged in two different anchor rods; the suture body control assembly is used for tensioning and releasing the suture line; when the puncture needle pierces into the anchor rod, the end of a suture line preset in the anchor rod can be captured, and the suture line is pulled out of the blood vessel wall when the puncture needle retracts. According to the multi-thread suture device, multi-thread suture of a large-diameter puncture opening can be achieved through one-time operation.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a vascular suture device. Background Technology

[0002] Percutaneous puncture via the femoral artery or vein is a routine approach for interventional treatment of cardiovascular, cerebrovascular, peripheral vascular, and tumor procedures. Effective and safe closure of the puncture site post-procedure is crucial. Currently, the main methods of hemostasis include manual compression, mechanical compression, and vascular closure devices.

[0003] Manual compression is time-consuming and laborious, leading to prolonged bed rest for patients and a high incidence of complications. While mechanical compression devices reduce the burden on medical staff, they do not significantly shorten the patient's immobilization time and carry the risk of insufficient or excessive compression.

[0004] Among vascular closure devices, suture devices have attracted attention due to their reliable closure effect. However, most existing vascular suture devices are single-thread sutures with limited closure diameter. For large-diameter puncture sites (e.g., greater than 10 Fr), multiple operations or the use of multiple suture devices are usually required to complete the closure, resulting in high surgical costs, complex procedures, and increased risks of vascular injury, incomplete suturing, and suture dehiscence due to repeated instrument insertion and exit. Although attempts have been made to integrate multiple single-thread suture structures side by side, this results in a significant increase in the outer diameter of the device, increasing the risk of tearing of the vascular wall, and also increases the complexity of the operation. Summary of the Invention

[0005] To enable multi-line suturing of large-diameter puncture sites in a single operation, this application provides a vascular suture device.

[0006] The vascular suture device provided in this application adopts the following technical solution:

[0007] A vascular suture device includes a handle and an outer tube, one end of which is connected to the handle, and the other end of which is provided with a needle. It also includes:

[0008] Anchoring mechanism, which includes multiple anchor rods that can be radially deployed and retracted;

[0009] An unfolding drive mechanism is used to drive the multiple anchor bolts from a retracted state to an unfolded state.

[0010] The puncture assembly includes multiple puncture needles movable within an outer tube, wherein the multiple puncture needles extend out of the outer tube and puncture vascular tissue to insert into a corresponding anchor.

[0011] Multiple sutures, each with its two ends set in two different anchor bolts;

[0012] A thread control assembly, disposed on the handle, is used to tension and release the suture thread;

[0013] When the puncture needle is connected to its corresponding anchor, it can capture the end of the suture pre-placed in the anchor and pull the suture out of the blood vessel wall when the puncture needle is withdrawn.

[0014] Furthermore, the unfolding drive mechanism includes a drive tube slidably disposed within the outer tube, and a drive assembly disposed within the handle;

[0015] The drive assembly includes a pusher frame slidably disposed within the handle, and one end of the drive tube is fixedly connected to the pusher frame; an L-shaped guide groove is provided on the handle housing, and a main push button extending through the L-shaped guide groove is connected to the pusher frame.

[0016] Furthermore, the anchoring mechanism includes a sliding tube that is linked to the end of the drive tube. The end of the sliding tube away from the drive rod is circumferentially provided with multiple limiting mechanisms. The anchor rod is rotatably disposed within the limiting mechanisms via a rotating connector.

[0017] The distal end of the outer tube or needle is provided with a guide part. When the sliding tube moves axially, the guide part guides the movement of the anchor rod, thereby causing the anchor rod to expand radially.

[0018] Furthermore, the deployment drive mechanism also includes a locking assembly, which includes a locking rod, a locking tube, and a locking block connected to the locking tube. The locking rod is linked with the drive assembly and can drive the locking tube to move, thereby causing the locking block to engage with the deployed anchor rod to restrict its rotation.

[0019] Furthermore, the drive assembly also includes a first elastic element and a second elastic element;

[0020] The first elastic element provides a restoring force to the push frame;

[0021] A fixed cylinder is provided inside the push frame, and the locking rod is fixedly connected to the fixed cylinder. The second elastic element is disposed between the push frame and the fixed cylinder. The pushing action of the main push button can sequentially compress the first elastic element and the second elastic element. The elastic force of the second elastic element is used to drive the locking rod to move to trigger the locking assembly.

[0022] Furthermore, an elastic reset member is provided between the needle and the sliding tube to apply a biasing force to the sliding tube to reset it.

[0023] Furthermore, the puncture assembly also includes a puncture drive component slidably disposed within the handle, the puncture drive component being provided with a puncture needle seat, and one end of the puncture needle being fixed to the puncture needle seat.

[0024] Furthermore, a hook groove is provided on the side wall of the puncture needle;

[0025] The end of the suture has an anti-loosening knot, the size of which is larger than the opening of the hook groove, and can be held in the hook groove.

[0026] Furthermore, the suture control assembly includes a control frame slidably disposed on the handle, and a releasable fixing component disposed inside the control frame; the releasable fixing component has a tensioned state for clamping the suture and a released state for releasing the suture.

[0027] Furthermore, the releasable fixing assembly includes two clamping blocks that can be moved toward each other by a triggering mechanism, and a locking lever disposed on the clamping blocks;

[0028] In the tensioned state, the end of the locking rod contacts the inner wall of the control frame, and the bent part of the stitching is sleeved on the locking rod;

[0029] In the released state, operating the trigger mechanism moves the locking lever, causing the bent portion of the suture to detach from the locking lever.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. Through a synergistic mechanism of "multiple anchor bolts, simultaneous suture pulling by multiple puncture needles, and coordinated tensioning of multiple sutures," reliable one-time closure of large-diameter puncture sites (e.g., greater than 10 Fr) is achieved. This solves the problems of high surgical costs, complex procedures, and increased risks of vascular injury, incomplete suturing, and suture dehiscence caused by multiple operations or the use of multiple instruments when closing large-diameter puncture sites with existing single-suture suture devices. At the same time, it avoids the drawbacks of significantly increased instrument outer diameter, increased risk of vascular wall tearing, and increased operational complexity caused by integrating multiple single-suture structures side by side.

[0032] By using a mechanical structure to achieve the synchronous deployment and collaboration of multiple sutures, the closure of large-diameter puncture sites can be completed in one go while ensuring the reasonable outer diameter of the instruments. This improves suturing efficiency and reliability, reduces surgical risks, and is suitable for closure scenarios after puncture of blood vessels of different diameters.

[0033] 2. Initially, the main push button is located near the L-shaped guide groove, the push frame and drive tube retract, and the anchor rod closes. When the anchor rod needs to be deployed, push the main push button axially along the longitudinal section of the L-shaped guide groove, causing the push frame to slide within the handle, simultaneously driving the drive tube within the outer tube to move distally—the longitudinal section of the L-shaped groove restricts the push frame to axial movement only, ensuring stable force on the drive tube and preventing displacement during anchor rod deployment; when the anchor rod is fully deployed, rotate the main push button to engage with the transverse section of the L-shaped groove. At this point, the push frame and drive tube are locked, preventing anchor rod retraction due to external force. This process, through mechanical guidance and locking design, achieves "controllable advancement + positioning locking" of anchor rod deployment, preventing accidental movement of the anchor rod during operation, improving the stability and accuracy of the deployment action, and simplifying the doctor's operating steps.

[0034] 3. The elastic repositioning element is positioned between the needle and the sliding tube, initially extending naturally. When the sliding tube moves distally to unfold the anchor rod, the elastic repositioning element is compressed; when the thrust of the driving tube is released, the elastic force of the elastic repositioning element simultaneously pushes the sliding tube proximally back. During this process, the elastic repositioning element and the first elastic element form a "double repositioning force," which can counteract the frictional force of the vascular tissue on the sliding tube, preventing the sliding tube from being stuck due to resistance and ensuring that the sliding tube drives the anchor rod to move, allowing the anchor rod to retract smoothly (facilitating the removal of the instrument from the blood vessel), and reducing secondary damage to the blood vessel wall during removal.

[0035] 4. When puncture is required, push the puncture drive component distally, causing the puncture needle hub and puncture needle to extend synchronously along the outer tube axis. After passing through the needle tip, accurately puncture the vascular tissue and insert into the lumen of the corresponding anchor. After capturing the suture, pull the puncture drive component in the opposite direction, causing the puncture needle hub to retract synchronously with the puncture needle, pulling the suture out from the anchor and through the vessel wall. This process, through the rigid connection of the "puncture drive component + needle hub," ensures that the extension or retraction of multiple puncture needles is completely synchronized, avoiding misalignment of a single needle that could prevent docking with the anchor, significantly improving puncture accuracy and suture success rate, and reducing vascular tissue damage caused by puncture deviation.

[0036] 5. When the puncture needle is inserted into the anchor rod, the anti-dislodgement knot enters the groove along with the suture. Because the anti-dislodgement knot is larger than the opening of the groove, it is firmly held inside and cannot come out. When the puncture needle is withdrawn, the groove, through the anti-dislodgement knot, moves the suture, pulling it out of the anchor rod and through the vessel wall. The combination of the groove and the anti-dislodgement knot solves the problem of easy suture slippage in traditional puncture needles with "needle hole threading," ensuring that the suture remains reliably connected to the puncture needle throughout the withdrawal process, avoiding secondary punctures due to suture slippage, and improving operational efficiency and safety. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0039] Figure 2 This is an enlarged structural diagram showing the unfolded anchor bolt according to an embodiment of this application;

[0040] Figure 3 This is a schematic diagram showing the structure of the handle's inner cavity according to an embodiment of this application;

[0041] Figure 4 This is an exploded view of the drive assembly and the handle housing in an embodiment of this application;

[0042] Figure 5 This is a schematic diagram showing the exploded structure of the outer tube and the drive tube in an embodiment of this application;

[0043] Figure 6 This is an exploded structural diagram of the outer tube, drive tube, and sliding tube, as shown in the embodiments of this application.

[0044] Figure 7 This is a schematic diagram of the structure of the line control assembly shown in an embodiment of this application;

[0045] Figure 8 This is an exploded view of the line control assembly as shown in an embodiment of this application;

[0046] Figure 9 This is an enlarged structural schematic diagram showing the suture line located inside the anchor bolt, according to an embodiment of this application.

[0047] Figure 10 This is a schematic diagram illustrating the structure of the puncture needle carrying the suture end penetrating the blood vessel wall, as shown in the embodiments of this application.

[0048] Figure 11 This is a schematic diagram illustrating the structure of a double-parallel suture method according to an embodiment of this application;

[0049] Figure 12 This is a structural schematic diagram showing the cross-stitch method of the sutures in an embodiment of this application.

[0050] Explanation of reference numerals in the attached drawings: 1. Handle; 11. Barrier plate; 12. Wire hole; 2. Outer tube; 21. Drive tube; 211. Wire groove; 22. Through hole; 23. Needle hole; 3. Anchoring mechanism; 31. Anchor rod; 311. Through hole; 32. Sliding tube; 33. Limiting groove; 34. Connecting ring; 4. Drive assembly; 41. Push frame; 42. Push rod; 43. Main push button; 44. L-shaped guide groove; 45. Limiting cylinder; 46. First elastic element; 47. Second elastic element; 48. Fixing cylinder; 5. Locking assembly; 51. Locking rod; 52. Locking tube; 53. Locking block; 6. Puncture assembly; 61. Puncture needle; 611. Groove; 62. Puncture drive component; 621. Drive frame; 622. Puncture needle seat; 623. Puncture push rod; 63. Sliding groove; 64. Limiting edge; 7. Thread control assembly; 71. Control frame; 711. Locking hole; 72. Positioning post; 73. Third elastic element; 74. Releasable fixing assembly; 741. Clamping block; 742. Locking rod; 743. Positioning rod; 744. Tension spring; 745. Adjusting block; 746. Abutting edge; 747. Button; 8. Suture thread; 81. Bending part; 9. Needle tip; 91. Receiving groove; 92. Elastic reset element. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Therefore, the detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to represent selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0052] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0053] A vascular suture device, as described above Figures 1 to 8 It includes a handle 1, an outer tube 2, an anchoring mechanism 3, an unfolding drive mechanism, a puncture assembly 6, a suture 8, and a suture control assembly 7.

[0054] Reference Figure 1 and Figure 2The handle 1 is the main operating and holding part. One end of the outer tube 2 is fixedly connected to the handle 1, and the other end of the outer tube 2 is connected to a soft needle 9, which is used to guide the instrument and protect the tissue. The needle 9 has a guidewire channel for passing through the guidewire. The guidewire channel runs through the entire vascular suture device, and the tip can smoothly and accurately enter the lumen of the blood vessel along the guidewire. The guidewire channel is made of high molecular materials such as PTFE and has a smooth inner lumen, which effectively prevents the guidewire from getting stuck.

[0055] Reference Figure 2 The anchoring mechanism 3 includes multiple anchor rods 31 that can switch between a radially retracted state inside the outer tube 2 and a radially extended state extending out of the outer tube 2. In this embodiment, there are four anchor rods 31. In other embodiments, the number of anchor rods 31 can be any even number greater than four. The deployment driving mechanism is used to drive the anchor rods 31 to switch states. It includes a driving tube 21, a sliding tube 32 driving assembly 4, and a locking assembly 5.

[0056] Reference Figures 3 to 5 The drive tube 21 is slidably disposed inside the outer tube 2, and the drive assembly 4 is disposed on the handle 1 for driving the sliding tube 32 to move within the inner cavity of the outer tube 2. The drive assembly 4 includes a push frame 41 vertically slidably disposed inside the handle 1, with a limit cylinder 45 fixedly connected to the bottom end of the push frame 41. One end of the drive tube 21 is inserted into the inner cavity of the handle 1 and fixed within the limit cylinder 45. Push rods 42 are fixedly connected to both sides of the push frame 41. An L-shaped guide groove 44 is formed vertically on the outer wall of the handle 1. The L-shaped guide groove 44 includes a sliding hole along the length of the handle 1 and a locking hole that communicates with and is perpendicular to the sliding hole. The end of the push rod 42 passes through the L-shaped guide groove 44 and is fixedly connected to a main push button 43.

[0057] Reference Figure 3 and Figure 4 A baffle plate 11 is fixedly connected to the inner wall of the handle 1, and a passage hole is provided on the baffle plate 11 for the drive tube 21 to pass through. A limit cylinder 45 is connected to the end of the push frame 41. A first elastic element 46 (such as a spring) is provided between the baffle plate 11 and the push frame 41. The first elastic element 46 is sleeved on the limit cylinder 45. One end of the first elastic element 46 abuts against the baffle plate 11, and the other end of the first elastic element 46 abuts against the push frame 41. Its elastic force gives the push frame 41 an upward resetting tendency.

[0058] Reference Figure 5 and Figure 6The sliding tube 32 is slidably disposed inside the outer tube 2. One end of the sliding tube 32 abuts against the end of the drive tube 21 away from the handle 1. The end of the sliding tube 32 away from the drive tube 21 has four limiting grooves 33 as limiting mechanisms. A spiral connecting ring 34, as a rotating connector, passes through these limiting grooves 33. The ends of the four anchor rods 31 are respectively hinged to the connecting rings 34 in the corresponding limiting grooves 33. The four anchor rods 31 are located at different positions on the connecting rings 34, and the four anchor rods 31 are of equal length, so that the plane formed by the ends of the four anchor rods 31 is an inclined surface. This design is to conform to the shape of the inner wall of the blood vessel.

[0059] Reference Figure 5 and Figure 6 An anchor rod 31 has a guide portion at its end away from the connecting ring 34. The guide portion is a guide slope at the end of the anchor rod 31. A receiving groove 91 is formed on the outer wall of the end of the needle 9 facing the connecting ring 34. A through hole 22 is formed on the wall of the outer tube 2 for the anchor rod 31 to extend out. When the anchor rod 31 moves toward the needle, the guide slope at the end of the anchor rod 31 contacts the wall of the receiving groove 91, thereby causing the anchor rod 31 to expand radially. In other embodiments, the guide portion can be a guide slope at the end of the needle 9. When the anchor rod 31 moves toward the end of the needle 9, it expands radially under the action of the guide slope at the end of the needle 9.

[0060] Pushing the main push button 43 downwards causes the pusher 41 to drive the drive tube 21 to move toward the sliding tube 32. Under the push of the drive tube 21, the sliding tube 32 drives the anchor rod 31 to move toward the needle head 9. The guide slope of the anchor rod 31 interacts with the wall of the receiving groove 91, forcing the anchor rod 31 to rotate around the connecting ring 34 and extend radially from the perforation 22, unfolding in an X shape.

[0061] Reference Figure 4 and Figure 6 The locking assembly 5 includes a locking rod 51 and a locking tube 52. The locking rod 51 is slidably disposed inside the drive tube 21. One end of the locking rod 51 extends into the inner cavity of the handle 1. A fixed cylinder 48 is disposed inside the push frame 41. One end of the locking rod 51 passes through the drive tube 21 and is fixedly connected to the fixed cylinder 48. The end of the locking rod 51 that passes through the fixed cylinder 48 passes through the push frame 41. A second elastic element 47 (such as a spring) is sleeved on the locking rod 51. One end of the second elastic element 47 abuts against the fixed cylinder 48, and the other end of the second elastic element 47 abuts against the push frame 41.

[0062] Reference Figure 6The locking tube 52 is slidably disposed inside the sliding tube 32. The inner cavity of the locking tube 52 has a locking groove (not shown in the figure) for the locking rod 51 to be inserted. One end of the locking rod 51 abuts against the inner wall of the locking groove. Several locking blocks 53 extending out of the limiting groove 33 are arranged around the outer wall of the locking tube 52. The end of the locking block 53 facing the anchor rod 31 is provided with a guide slope.

[0063] When the main push button 43 is pushed, the push frame 41 first overcomes the force of the first elastic element 46 to drive the anchor rod 31 to unfold and compress the second elastic element 47. After the anchor rod 31 is fully unfolded, the elastic force of the second elastic element 47 pushes the fixing cylinder 48 and the locking rod 51 downward. The locking rod 51 inserts into the locking groove and pushes the locking tube 52, causing the locking block 53 to move forward and engage with the anchor rod 31, locking it. This achieves automatic timing control of "unfolding first, then locking".

[0064] A circular groove is provided at the end of the needle 9 facing the sliding tube 32. An elastic reset member 92 is provided in the circular groove. The elastic reset member 92 is a spring. One end of the elastic reset member 92 abuts against the inner wall of the circular groove, and the other end of the elastic reset member is connected to the inner wall of the locking tube 52.

[0065] Rotating the main push button 43 causes the push rod 42 to enter the sliding hole, and the elastic force of the first elastic element 46 drives the push frame 41 back to its original position. At this time, the drive tube 21 separates from the sliding tube 32, the locking rod 51 is pulled out of the locking groove, the elastic reset element 92 pushes the locking tube 52 to reset, and the locking block 53 pushes the wall of the limiting groove 33, causing the sliding tube 32 to reset, so that the anchor rod 31 retracts into the outer tube 2. Then, the needle 9 and the puncture needle 61 are pulled out of the blood vessel. When the puncture needle 61 is withdrawn, it pulls the suture 8 out of the blood vessel wall.

[0066] Reference Figure 3 and Figure 4 The puncture assembly 6 includes four puncture needles 61 and a puncture drive unit 62 disposed within the handle 1. The puncture drive unit 62 includes a slidably disposed drive frame 621, a puncture needle seat 622, and a puncture push rod 623 extending through the top of the handle 1. One end of each puncture needle 61 is fixed to the puncture needle seat 622. Sliding grooves 63 are provided on two opposite sidewalls of the inner cavity of the handle 1, extending along the length of the handle 1. Limiting edges 64, which slide within the corresponding sliding grooves 63, are fixedly connected to both sides of the drive frame 621.

[0067] Reference Figure 5 and Figure 6 The inner wall of the drive tube 21 has a sliding cavity for the puncture needle 61 to slide through. The outer walls of the drive tube 21 and the outer tube 2 have four needle holes 23 spirally arranged for the puncture needle 61 to pass through. The anchor rod 31 has a hollow structure, and the side wall of the anchor rod 31 has a through hole 311 for the puncture needle 61 to be inserted. The side wall of the puncture needle 61 has a hook groove 611.

[0068] Reference Figure 9 Two sutures 8 are provided, made of polymer material. The two ends of each suture 8 are pre-placed in two adjacent anchor rods 31, and the ends of the sutures 8 are tied with fisherman's knots as anti-loosening knots. The size of the fisherman's knot is larger than the opening of the hook groove 611.

[0069] Reference Figure 9 The outer wall of the drive tube 21 has two grooves 211 along the axial direction. The bent part 81 of the suture 8 is accommodated in the groove 211 and passes through the handle 1. When the puncture needle 61 is inserted into the anchor rod 31, the bent part 81 of the suture 8 is pulled, so that the suture 8 is tightened, and the fisherman's knot slides into and is locked in the hook groove 611 of the puncture needle 61, so as to achieve reliable capture.

[0070] Reference Figure 7 and Figure 8 The thread control assembly 7 is disposed on the handle 1 and is used to tension and release the suture 8. The thread control assembly 7 includes a control frame 71 that is vertically slidably disposed on the outer wall of the handle 1, and a releasable fixing assembly 74 disposed inside the control frame 71.

[0071] Reference Figure 8 A positioning post 72 is fixedly connected to the outer wall of the handle 1. The positioning post 72 is located below the control frame 71. A third elastic element 73, which is a spring, is connected between the positioning post 72 and the control frame 71. When the control frame 71 slides vertically upward, the third elastic element 73 is stretched, and the elastic force of the third elastic element 73 can make the control frame 71 return to its original position.

[0072] Reference Figure 8 The releasable fixing component 74 includes two opposing movable clamping blocks 741. Two parallel positioning rods 743 are inserted between the two clamping blocks 741. The two ends of the positioning rods 743 are respectively inserted into the side walls at both ends of the control frame 71, thereby providing support for the clamping blocks 741.

[0073] Reference Figure 8 The releasable fixing component 74 also includes a triggering mechanism for driving two clamping blocks 741 to move towards each other. The triggering mechanism includes a tension spring 744 disposed between the two clamping blocks 741. When the tension spring 744 is in a compressed state, the two clamping blocks 741 can slide towards each other on the positioning rod 743. The triggering mechanism also includes an adjusting block 745 disposed between the two clamping blocks 741. The two side walls of the adjusting block 745 are provided with snap-fit ​​grooves. The end of the clamping block 741 facing the adjusting block 745 is fixedly connected to an abutment edge 746 that snaps into the snap-fit ​​groove. The end of the adjusting block 745 is connected to a button 747 that protrudes from the outer wall of the control frame 71. The end of the adjusting block 745 near the button 747 is provided with a guide slope, and the cross-sectional area of ​​the end of the adjusting block 745 facing the button 747 gradually decreases.

[0074] Reference Figure 8 A locking rod 742 is fixedly connected to one end of the clamping block 741 away from the adjusting block 745. Locking holes 711 are provided on both sides of the control frame 71 for the locking rod 742 to extend into. A thread hole 12 is provided on the outer wall of the handle 1 for the suture 8 to pass through. The bent part 81 of the suture 8 passes through the thread hole 12 and is wrapped around the locking rod 742.

[0075] In its natural state, the tension spring 744 provides tension for the two clamping blocks 741 to clamp the adjusting block 745, at which point the locking rod 742 is just inserted into the lock hole 711.

[0076] Reference Figure 8 When the control frame 71 slides away from the needle 9, the locking lever 742 pulls the suture 8, thereby tightening the suture 8, and the fisherman's knot slides into and locks into the hook groove 611 of the puncture needle 61. Pressing the button 747 again causes the abutment to slide out of the locking groove and move on the guide slope of the adjusting block 745. At this time, the two clamping blocks 741 slide towards each other on the positioning lever 743, and the locking lever 742 moves in the direction of movement of the clamping blocks 741, thereby passing through the locking hole 711. The locking lever 742 separates from the side wall of the control frame 71, and the bent part 81 of the suture 8 falls off the locking lever 742.

[0077] Reference Figure 10 When the puncture needle 61 is withdrawn from the blood vessel, it pulls the suture 8 out of the blood vessel wall, and the bent part 81 of the suture 8 enters the blood vessel. Then, the end of the suture 8 is removed from the puncture needle 61 and tied and locked, thereby suturing the wound.

[0078] The implementation principle of a vascular suture device according to an embodiment of this application is as follows: The instrument is delivered to the vascular puncture site along the guide wire. The main push button 43 drives the drive tube 21 forward through the push frame 41, and the drive tube 21 pushes the sliding tube 32. When the sliding tube 32 moves forward, the guide slope of the anchor rod 31 interacts with the edge of the receiving groove 91 of the needle tip 9, forcing the anchor rod 31 to rotate around the connecting ring 34 and extend radially from the perforation 22, spreading out in an X shape inside the blood vessel. The main push button 43 is continued to be pushed to the end of the sliding hole, and then the main push button 43 is rotated into the locking hole. The push frame 41 will compress the second elastic element 47, and its elasticity will push the fixing cylinder 48 and the locking rod 51 forward. The locking rod 51 is inserted into the locking groove of the locking tube 52, pushing the locking tube 52 and the locking block 53 forward. The slope of the locking block 53 contacts the anchor rod 31 and presses it tightly to lock it, preventing it from retracting.

[0079] Press the puncture pusher 623 forward, causing the puncture needle seat 622 and four puncture needles 61 to pass through the puncture hole 23 along an inclined path, pierce the blood vessel wall, and precisely insert into the through hole 311 of the corresponding anchor rod 31. At this time, the end of the suture (with a fisherman's knot) pre-placed in the anchor rod 31 is located near the hook groove 611 of the puncture needle 61.

[0080] When the control frame 71 is pushed to slide away from the needle 9, the locking lever 742 pulls the suture 8, thereby straightening the suture 8, and the fisherman's knot slides into and locks into the hook groove 611. Pressing the button 747 again causes the abutment to slide out of the locking groove along the abutment 746 and move on the guide slope of the adjusting block 745. At this time, the two clamping blocks 741 slide towards each other on the positioning lever 743, and the locking lever 742 moves in the direction of movement of the clamping blocks 741, thereby passing through the lock hole 711, and the bent part 81 of the suture 8 disengages from the locking lever 742.

[0081] Pulling the puncture pusher 623 backward causes the puncture needle 61 to retract, carrying the captured suture 8 ends. This pulls the suture 8 ends out of the anchor rod 31 and through the vessel wall, ultimately pulling all four suture 8 ends completely out of the body. Under the pulling force of the puncture needle 61, the bent portion 81 of the suture 8 moves towards the vessel lumen until it enters the vessel lumen at the puncture site. At this point, the bent portion 81 remains within the vessel lumen and spans the puncture site. The two ends of the suture 8 emerge from the vessel walls on both sides of the puncture site. Tying the two ends of the suture 8 together closes the wound.

[0082] Rotate the main push button 43 to the sliding hole. The first elastic element 46 pushes the drive push frame 41 back to its original position, and the drive tube 21 and sliding tube 32 move backward. The second elastic element 47 pulls the locking rod 51 backward. The anchor rod 31 is retracted into the outer tube 2 under the action of the elastic reset element 92 inside the needle 9. Finally, withdraw the entire instrument along the sutures. At this time, the two sutures pass through the blood vessel wall with four U-shaped suture legs.

[0083] Externally, depending on the puncture site, the two ends of the same suture are tied together to form a double-parallel suture (refer to...). Figure 11 Alternatively, cross and tie the four ends of the two threads together to form a cross stitch (see [reference]). Figure 12 Using a suture pusher, the knot is pushed to the outer wall of the blood vessel and locked. Excess sutures are then cut to close the puncture site.

[0084] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vascular suture device, comprising a handle (1) and an outer tube (2), one end of the outer tube (2) being connected to the handle (1), and the other end of the outer tube (2) being provided with a needle (9), characterized in that, Also includes: Anchoring mechanism (3), which includes multiple anchor rods (31) that can be radially extended and retracted; An unfolding drive mechanism is used to drive the multiple anchor rods (31) from a retracted state to an unfolded state; The puncture assembly (6) includes a plurality of puncture needles (61) movable within the outer tube (2), wherein the plurality of puncture needles (61) can extend out of the outer tube (2) and puncture vascular tissue to insert into the corresponding anchor (31); Multiple sutures (8), each suture (8) having its two ends set in two different anchor rods (31); A thread control assembly (7) is disposed on the handle (1) for tensioning and releasing the suture (8). When the puncture needle (61) is connected to its corresponding anchor (31), it can capture the end of the suture (8) pre-placed in the anchor (31) and pull the suture (8) out of the blood vessel wall when the puncture needle (61) is withdrawn.

2. The vascular suture device according to claim 1, characterized in that, The unfolding drive mechanism includes a drive tube (21) that is slidably disposed in the outer tube (2), and a drive assembly (4) disposed in the handle (1). The drive assembly (4) includes a pusher (41) slidably disposed in the handle (1), and one end of the drive tube (21) is fixedly connected to the pusher (41); an L-shaped guide groove (44) is provided on the outer shell of the handle (1), and a main push button (43) passing through the L-shaped guide groove (44) is connected to the pusher (41).

3. The vascular suture device according to claim 2, characterized in that, The anchoring mechanism (3) includes a sliding tube (32) that is linked to the end of the drive tube (21). The end of the sliding tube (32) away from the drive tube (21) is provided with a plurality of limiting mechanisms in the circumferential direction. The anchor rod (31) is rotatably disposed in the limiting mechanism through a rotating connector. The distal end of the outer tube (2) or needle (9) is provided with a guide part. When the sliding tube (32) moves axially, the guide part guides the movement of the anchor rod (31), thereby causing the anchor rod (31) to expand radially.

4. The vascular suture device according to claim 3, characterized in that, The unfolding drive mechanism also includes a locking assembly (5), which includes a locking rod (51), a locking tube (52), and a locking block (53) connected to the locking tube (52). The locking rod (51) is linked with the drive assembly (4) and can drive the locking tube (52) to move, thereby causing the locking block (53) to engage with the unfolded anchor rod (31) to restrict its rotation.

5. The vascular suture device according to claim 4, characterized in that, The drive assembly (4) further includes a first elastic element (46) and a second elastic element (47); The first elastic element (46) provides a restoring force to the push frame (41); The push frame (41) is provided with a fixed cylinder (48), the locking rod (51) is fixedly connected to the fixed cylinder (48), and the second elastic element (47) is disposed between the push frame (41) and the fixed cylinder (48); the pushing action of the main push button (43) can sequentially compress the first elastic element (46) and the second elastic element (47), and the elastic force of the second elastic element (47) is used to drive the locking rod (51) to move to trigger the locking assembly (5).

6. The vascular suture device according to claim 3, characterized in that, An elastic reset member (92) is provided between the needle (9) and the sliding tube (32) for applying a biasing force to the sliding tube (32) to reset it.

7. The vascular suture device according to claim 2, characterized in that, The puncture assembly (6) further includes a puncture drive (62) slidably disposed in the handle (1), the puncture drive (62) being provided with a puncture needle seat (622), and one end of the puncture needle (61) being fixed to the puncture needle seat (622).

8. The vascular suture device according to claim 1, characterized in that, The puncture needle (61) has a hook groove (611) on its side wall. The end of the suture (8) is formed with an anti-loosening knot, the size of which is larger than the opening of the hook groove (611) and can be held in the hook groove (611).

9. The vascular suture device according to claim 1, characterized in that, The suture control assembly (7) includes a control frame (71) slidably disposed on the handle (1) and a releasable fixing assembly (74) disposed inside the control frame (71); the releasable fixing assembly (74) has a tensioned state that clamps the suture (8) and a released state that releases the suture (8).

10. The vascular suture device according to claim 9, characterized in that, The releasable fixing assembly (74) includes two clamping blocks (741) that can be moved toward each other by a triggering mechanism, and a locking lever (742) disposed on the clamping blocks (741). In the tensioned state, the end of the locking rod (742) contacts the inner wall of the control frame (71), and the bent part (81) of the suture (8) is sleeved on the locking rod (742); In the released state, the triggering mechanism is operated to move the locking lever (742), and the bent portion (81) of the suture (8) falls off the locking lever (742).

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