A vascular stapler

Abstract

The application relates to the technical field of medical devices, and particularly discloses a blood vessel suturing device. In order to solve the problem that multiple operations or multiple suturing devices are needed to complete the closure of a large-diameter puncture, leading to high operation cost and complex operation process, the blood vessel suturing device comprises a handle, an outer tube connected with the handle, and a needle arranged at the end of the outer tube, and further comprises: an anchoring mechanism comprising a plurality of anchor rods capable of being radially expanded and contracted; an expansion driving mechanism used for driving the plurality of anchor rods to be switched from a contracted state to an expanded state; a puncture assembly comprising a plurality of puncture needles capable of puncturing blood vessel tissues and being inserted into corresponding anchor rods; two ends of each suture are arranged in two different anchor rods; a line body control assembly used for tensioning and releasing the suture; when the puncture needle is inserted into the anchor rod, the end of the suture preset in the anchor rod can be captured, and the suture is pulled out of the blood vessel wall when the puncture needle is withdrawn. The application can realize the multi-line suturing of a large-diameter puncture through single operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a blood vessel suturing device. BACKGROUND

[0002] Transfemoral artery, transfemoral vein and other vascular puncture is a routine access method for cardiovascular, peripheral vascular and tumor interventional therapy. Effective and safe closure of the puncture site after operation is crucial. The main hemostasis methods at present include manual compression, mechanical compression and vascular closure device.

[0003] Manual compression is time-consuming and labor-intensive, and the patient needs to stay in bed for a long time, with a high incidence of complications. Although mechanical compression devices reduce the burden on medical staff, the patient's immobilization time is not significantly shortened, and there is a risk of insufficient or excessive compression.

[0004] Among the vascular closure devices, the suturing type device has attracted attention due to its reliable closure effect. However, most of the existing blood vessel suturing devices are single-line suturing, and the closure diameter is limited. For large-diameter puncture (e.g., greater than 10 Fr), multiple operations or multiple suturing devices are usually required to complete the closure, which leads to high surgical cost and complex operation process, and multiple instrument access to the puncture site increases the risk of vascular injury, incomplete suturing and suture line shedding. Although attempts have been made to integrate multiple single-line suturing structures side by side, this will significantly increase the outer diameter of the device, increase the risk of tearing the inner wall of the blood vessel, and increase the complexity of the operation. SUMMARY

[0005] In order to achieve multi-line suturing of large-diameter puncture in a single operation, the present application provides a blood vessel suturing device.

[0006] The blood vessel suturing device provided by the present application adopts the following technical scheme:

[0007] A blood vessel suturing device, comprising a handle and an outer tube, one end of the outer tube being connected to the handle, the other end of the outer tube being provided with a needle, further comprising:

[0008] An anchoring mechanism comprising a plurality of anchor rods capable of being radially expanded and contracted;

[0009] An expansion driving mechanism for driving the plurality of anchor rods to switch from a contracted state to an expanded state;

[0010] A puncture assembly comprising a plurality of puncture needles capable of moving within the outer tube, the plurality of puncture needles being capable of extending out of the outer tube and puncturing the blood vessel tissue and inserting into the corresponding anchor rod;

[0011] A plurality of suture lines, both ends of each suture line being arranged in two different anchor rods;

[0012] A wire body control assembly arranged on the handle for tensioning and releasing the suture lines;

[0013] The puncture needle can capture the end of the suture prepositioned in the anchor rod when the puncture needle is docked with the anchor rod, and can pull the suture out of the blood vessel wall when the puncture needle is withdrawn.

[0014] Further, the deployment driving mechanism comprises a driving tube slidingly arranged in the outer tube, and a driving assembly arranged in the handle;

[0015] The driving assembly comprises a pushing frame slidingly arranged in the handle, and one end of the driving tube is fixedly connected with the pushing frame; an L-shaped guide slot is formed on the handle shell, and a main pushing button connected with the pushing frame penetrates through the L-shaped guide slot.

[0016] Further, the anchor mechanism comprises a sliding tube connected with the end of the driving tube, and a plurality of limiting mechanisms are circumferentially arranged on the end of the sliding tube away from the driving tube; the anchor rod is rotatably arranged in the limiting mechanism through a rotating connecting piece;

[0017] The distal end of the outer tube or the needle is provided with a guide part, and when the sliding tube moves axially, the guide part guides the movement of the anchor rod, so that the anchor rod is radially deployed.

[0018] Further, the deployment driving mechanism further comprises a locking assembly, the locking assembly comprises a locking rod, a locking tube and a locking block connected with the locking tube; the locking rod is connected with the driving assembly and can drive the locking tube to move, so that the locking block is engaged with the deployed anchor rod to limit the rotation thereof.

[0019] Further, the driving assembly further comprises a first elastic member and a second elastic member;

[0020] The first elastic member provides a reset force to the pushing frame;

[0021] The pushing frame is provided with a fixing cylinder, the locking rod is fixedly connected with the fixing cylinder, and the second elastic member is arranged between the pushing frame and the fixing cylinder; the advancing action of the main pushing button can sequentially compress the first elastic member and the second elastic member, and the elastic force of the second elastic member is used to drive the locking rod to move to trigger the locking assembly.

[0022] Further, an elastic reset member is arranged between the needle and the sliding tube, which is used to apply a biasing force to the sliding tube to reset the same.

[0023] Further, the puncture assembly further comprises a puncture driving member slidingly arranged in the handle, the puncture driving member is provided with a puncture needle seat, and one end of the puncture needle is fixedly connected with the puncture needle seat.

[0024] Further, a hook groove is formed on the side wall of the puncture needle.

[0025] The end of the suture is formed with an anti-loosing knot, which is larger than the opening of the hook groove and can be clamped in the hook groove.

[0026] Further, the wire control assembly includes a control frame slidingly arranged on the handle, and a releasable fixing assembly arranged inside the control frame; the releasable fixing assembly has a clamping state of clamping the suture and a release state of releasing the suture.

[0027] Further, the releasable fixing assembly includes two clamping blocks that can be driven to move towards each other by a trigger mechanism, and a locking rod arranged on the clamping blocks;

[0028] In the clamping state, the end of the locking rod is in contact with the inner wall of the control frame, and the bent part of the suture is sleeved on the locking rod;

[0029] In the release state, the locking rod is moved by operating the trigger mechanism, and the bent part of the suture is detached from the locking rod.

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

[0031] 1. Through the cooperative mechanism of "multi-anchor rod anchoring-multi-puncture needle synchronous wire pulling-multi-suture cooperative tensioning", the large-diameter puncture (for example, greater than 10 Fr) can be reliably closed at one time. The problems of high operation cost, complex operation process, and increased risk of blood vessel injury, incomplete suture, and suture line falling caused by multiple operations or the use of multiple instruments when closing a large-diameter puncture with a single wire suture device are solved; at the same time, the defects of significant increase in the outer diameter of the instrument, increased risk of blood vessel wall tearing, and increased operation complexity caused by parallel integration of multiple single wire suture structures are avoided.

[0032] Through the mechanical structure, the synchronous deployment and cooperation of multiple sutures are realized, and under the premise of ensuring the reasonable outer diameter of the instrument, the closure of the large-diameter puncture is completed at one time, the suture efficiency and reliability are improved, the operation risk is reduced, and the closure scene after puncturing blood vessels of different diameters is suitable.

[0033] 2. Initially, the main push button is located at the proximal end of the L-shaped guide slot, and the push frame and the drive tube are retracted, and the anchor rod is retracted. When the anchor rod needs to be expanded, the main push button is pushed axially along the longitudinal section of the L-shaped guide slot, driving the push frame to slide in the handle, and synchronously driving the drive tube in the outer tube to move to the distal end. The longitudinal section of the L-shaped slot limits the axial movement of the push frame, ensuring the stability of the drive tube under stress and avoiding the deviation of the anchor rod during expansion. When the anchor rod is fully expanded, the main push button is rotated and locked into the transverse section of the L-shaped slot. At this time, the push frame and the drive tube are locked to prevent the anchor rod from retracting due to external force. This process realizes the "controllable propulsion + positioning locking" of the anchor rod expansion through mechanical guidance and locking design, avoids accidental movement of the anchor rod during operation, improves the stability and accuracy of the expansion action, and simplifies the operation steps of the doctor.

[0034] 3. The elastic reset member is arranged between the needle and the sliding tube, and is naturally stretched in the initial state. When the sliding tube moves to the distal end to expand the anchor rod, the elastic reset member is compressed; when the pushing force of the drive tube is removed, the elastic force of the elastic reset member synchronously pushes the sliding tube to move to the proximal end. During this process, the elastic reset member and the first elastic member form "double reset force", which can offset the frictional force of the blood vessel tissue on the sliding tube, avoid the sliding tube from being stuck due to resistance, ensure the sliding tube to drive the anchor rod to move, make the anchor rod retract smoothly (facilitating the withdrawal of the instrument from the blood vessel), and reduce the secondary damage to the blood vessel wall during withdrawal.

[0035] 4. When puncture is needed, the puncture driving member is pushed to move to the distal end, driving the puncture needle seat and the puncture needle to synchronously extend axially along the outer tube, puncture the blood vessel tissue accurately and insert into the inner cavity of the corresponding anchor rod; after capturing the suture, the puncture driving member is pulled in the opposite direction, the puncture needle seat drives the puncture needle to synchronously retract, pulls out the suture from the anchor rod and penetrates through the blood vessel wall. This process ensures the complete synchronization of the extension or retraction of multiple puncture needles through the rigid connection of "puncture driving member + needle seat", avoids the deviation of single needle leading to the failure of docking with the anchor rod, significantly improves the puncture accuracy and the success rate of pulling the line, and reduces the damage to the blood vessel tissue caused by puncture deviation.

[0036] 5. When the puncture needle is inserted into the anchor rod, the anti-escape knot enters the hook groove along with the suture, and is firmly clamped in the hook groove and cannot escape because the size of the anti-escape knot is larger than the opening of the hook groove; when the puncture needle is retracted, the hook groove drives the suture to move through the anti-escape knot, and the suture is pulled out from the anchor rod and penetrates through the blood vessel wall. The cooperation of the hook groove and the anti-escape knot solves the problem of easy falling of the traditional puncture needle "needle hole threading", ensures that the suture is always reliably connected with the puncture needle during the retraction process, avoids the secondary puncture caused by the disconnection of the suture, and improves the operation efficiency and safety. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0038] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application.

[0039] Figure 2 It is a schematic diagram of the enlarged structure of the anchor rod expansion of the embodiment of the present application.

[0040] Figure 3 It is a schematic diagram of the structure of the handle inner cavity of the embodiment of the present application.

[0041] Figure 4 It is an exploded schematic diagram of the driving assembly and the handle shell of the embodiment of the present application.

[0042] Figure 5 It is an exploded schematic diagram of the outer tube and the driving tube of the embodiment of the present application.

[0043] Figure 6 It is an exploded schematic diagram of the outer tube, the driving tube and the sliding tube of the embodiment of the present application.

[0044] Figure 7 It is a schematic diagram of the structure of the wire body control assembly of the embodiment of the present application.

[0045] Figure 8 It is an exploded schematic diagram of the wire body control assembly of the embodiment of the present application.

[0046] Figure 9 It is a schematic diagram of the enlarged structure of the suture located in the anchor rod of the embodiment of the present application.

[0047] Figure 10 It is a schematic diagram of the structure of the suture needle carrying the suture end part out of the blood vessel wall of the embodiment of the present application.

[0048] Figure 11 It is a schematic diagram of the structure of the double-wire parallel suture method of the suture of the embodiment of the present application.

[0049] Figure 12 It is a schematic diagram of the structure of the cross suture method of the suture of the embodiment of the present application.

[0050] Explanation of reference signs: 1, handle; 11, blocking plate; 12, wire hole; 2, outer tube; 21, driving tube; 211, wire groove; 22, through hole; 23, needle passing hole; 3, anchoring mechanism; 31, anchor rod; 311, through hole; 32, sliding tube; 33, limiting groove; 34, connecting ring; 4, driving assembly; 41, pushing frame; 42, pushing rod; 43, main pushing button; 44, L-shaped guide groove; 45, limiting cylinder; 46, first elastic member; 47, second elastic member; 48, fixing cylinder; 5, locking assembly; 51, locking rod; 52, locking tube; 53, locking block; 6, puncture assembly; 61, puncture needle; 611, hook groove; 62, puncture driving member; 621, driving frame; 622, puncture needle seat; 623, puncture pushing rod; 63, sliding groove; 64, limiting edge; 7, wire body control assembly; 71, control frame; 711, lock hole; 72, positioning column; 73, third elastic member; 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; 81, bending part; 9, needle; 91, accommodating groove; 92, elastic reset member. DETAILED DESCRIPTION

[0051] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0052] The specific embodiments of the present application will be described below with reference to the accompanying drawings. Figures 1-12 The present application will be described in further detail.

[0053] A vascular suture device, with reference to Figures 1 to 8 , comprising a handle 1, an outer tube 2, an anchoring mechanism 3, a deployment driving mechanism, a puncture assembly 6, a suture 8 and a wire body control assembly 7.

[0054] With reference to Figure 1 and Figure 2, handle 1 is the main operation and holding part, one end of outer tube 2 is fixedly connected with handle 1, the other end of outer tube 2 is connected with soft needle 9 for guiding instrument and protecting tissue. Needle 9 is provided with guide wire channel for penetrating guide wire, guide wire channel penetrates through the whole blood vessel suture device, head end can smoothly and accurately enter into blood vessel lumen along guide wire, guide wire cavity is made of PTFE and other high polymer materials, has smooth inner cavity, effectively prevents guide wire from being jammed.

[0055] Referring to Figure 2 , anchor mechanism 3 includes a plurality of anchor rods 31 which can be converted between radially collapsed state inside outer tube 2 and radially expanded state extending out of outer tube 2, in this embodiment, the number of anchor rods 31 is four, in other embodiments, the number of anchor rods 31 can be any even number greater than four, expansion driving mechanism is used for driving anchor rods 31 to convert state, which includes driving tube 21, sliding tube 32 driving assembly 4 and locking assembly 5.

[0056] Referring to Figures 3 to 5 , driving tube 21 is slidingly arranged in outer tube 2, driving assembly 4 is arranged on handle 1, which is used for driving sliding tube 32 to move in the inner cavity of outer tube 2. Driving assembly 4 includes push frame 41 which is vertically slidingly arranged in handle 1, the bottom end of push frame 41 is fixedly connected with limiting cylinder 45, one end of driving tube 21 is inserted into the inner cavity of handle 1 and fixed in limiting cylinder 45. Pushing rod 42 is fixedly connected on both side walls of push frame 41, L-shaped guide slot 44 is formed on the outer wall of handle 1 in vertical direction, L-shaped guide slot 44 includes sliding hole which is formed along the length direction of handle 1, and locking hole which is communicated with sliding hole and perpendicular to sliding hole, the end of pushing rod 42 penetrates out of L-shaped guide slot 44 and is fixedly connected with main pushing button 43.

[0057] Referring to Figure 3 and Figure 4 , the inner wall of handle 1 is fixedly connected with blocking plate 11, blocking plate 11 is provided with passing hole for driving tube 21 to pass through. The end of push frame 41 is connected with limiting cylinder 45, first elastic member 46 (such as spring) is arranged between blocking plate 11 and push frame 41, first elastic member 46 is sleeved on limiting cylinder 45, one end of first elastic member 46 abuts against blocking plate 11, the other end of first elastic member 46 abuts against push frame 41, the elastic force of first elastic member 46 makes push frame 41 have upward restoring tendency.

[0058] Referring to Figure 5 and Figure 6, the sliding tube 32 is slidably arranged in the outer tube 2, one end of the sliding tube 32 abuts with the end of the driving tube 21 away from the handle 1, and the end of the sliding tube 32 away from the driving tube 21 is provided with four limiting grooves 33 as a limiting mechanism. The helical connecting ring 34 as a rotating connecting piece penetrates through the limiting grooves 33, and the ends of the four anchor rods 31 are respectively hinged to the connecting ring 34 in the corresponding limiting groove 33. The four anchor rods 31 are located at different positions of the connecting ring 34, and the four anchor rods 31 are equal in length, so that the plane formed by the ends of the four anchor rods 31 is an inclined plane, which is designed to match the shape of the inner wall of the blood vessel.

[0059] With reference to Figure 5 and Figure 6 , the end of the anchor rod 31 away from the connecting ring 34 is provided with a guide part, which is a guide inclined surface arranged at the end of the anchor rod 31, and the end wall of the needle 9 away from the connecting ring 34 is provided with a containing groove 91, and the wall of the outer tube 2 is provided with a through hole 22 for the anchor rod 31 to extend out. When the anchor rod 31 moves towards the needle direction, the guide inclined surface at the end of the anchor rod 31 contacts with the wall of the containing groove 91, so that the anchor rod 31 expands radially. In other embodiments, the guide part can be a guide inclined surface arranged at the end of the needle 9, and when the anchor rod 31 moves towards the end of the needle 9, the guide inclined surface at the end of the needle 9 causes the anchor rod 31 to expand radially.

[0060] Pushing the main push button 43 downward, the pushing frame 41 drives the driving tube 21 to move towards the sliding tube 32, the sliding tube 32 drives the anchor rod 31 to move towards the needle 9 under the pushing action of the driving tube 21, the guide inclined surface at the end of the anchor rod 31 interacts with the wall of the containing groove 91, forcing the anchor rod 31 to rotate around the connecting ring 34 and extend radially from the through hole 22, forming an X shape.

[0061] With reference to 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 arranged in the driving tube 21, one end of the locking rod 51 extends into the inner cavity of the handle 1, the inside of the pushing frame 41 is provided with a fixing cylinder 48, one end of the locking rod 51 penetrates out of the driving tube 21, the locking rod 51 penetrates through the fixing cylinder 48 and is fixedly connected with the fixing cylinder 48, and the end of the locking rod 51 penetrating out of the fixing cylinder 48 penetrates through the pushing 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 with the fixing cylinder 48, and the other end of the second elastic element 47 abuts with the pushing frame 41.

[0062] With reference to Figure 6The locking pipe 52 is slidingly arranged in the sliding pipe 32, and a locking groove (not shown in the figure) is formed in the inner cavity of the locking pipe 52 for inserting the locking rod 51, and one end of the locking rod 51 abuts against the inner wall of the locking groove. A plurality of locking blocks 53 are arranged on the outer wall of the locking pipe 52 and surround the limiting groove 33, and the locking blocks 53 are provided with guide inclined surfaces towards the end of the anchor rod 31.

[0063] When the main push button 43 is pushed, the pushing frame 41 first drives the anchor rod 31 to expand against the force of the first elastic member 46, and compresses the second elastic member 47. When the anchor rod 31 is fully expanded, the elastic force of the second elastic member 47 pushes the fixed cylinder 48 and the locking rod 51 to move downward, the locking rod 51 is inserted into the locking groove to push the locking pipe 52, so that the locking blocks 53 move forward and are engaged with the anchor rod 31, thereby locking the anchor rod 31. Thus, the automatic timing control of “expanding first and then locking” is realized.

[0064] The end of the needle 9 towards the sliding pipe 32 is provided with a circular groove, and an elastic reset member 92 is arranged 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 cavity wall of the locking pipe 52.

[0065] The main push button 43 is rotated, so that the pushing rod 42 enters the sliding hole, and the elastic force of the first elastic member 46 can drive the pushing frame 41 to return to the original position. At this time, the driving pipe 21 is separated from the sliding pipe 32, the locking rod 51 is separated from the locking groove, the elastic reset member 92 pushes the locking pipe 52 to reset, the locking blocks 53 push the wall of the limiting groove 33, and the sliding pipe 32 is reset, so that the anchor rod 31 is retracted into the outer pipe 2. Then the needle 9 and the puncture needle 61 are separated from the blood vessel, and the puncture needle 61 is withdrawn, which pulls the suture 8 out of the blood vessel wall.

[0066] Referring to Figure 3 and Figure 4 The puncture assembly 6 includes four puncture needles 61 and a puncture driving member 62 arranged in the handle 1. The puncture driving member 62 includes a slidingly arranged driving frame 621, a puncture needle seat 622, and a puncture pushing rod 623 penetrating the top end of the handle 1, and one end of the puncture needle 61 is fixed to the puncture needle seat 622. The inner cavities of the opposite two side walls of the handle 1 are provided with sliding grooves 63, the sliding grooves 63 are formed along the length direction of the handle 1, and the two sides of the driving frame 621 are fixedly connected with limiting rails 64 sliding in the corresponding sliding grooves 63.

[0067] Referring to Figure 5 and Figure 6 The inner wall of the driving pipe 21 is provided with a moving cavity for sliding the puncture needle 61, and the outer wall of the driving pipe 21 and the outer pipe 2 is spirally provided with four needle penetrating holes 23 for the puncture needle 61 to penetrate. The anchor rod 31 is a hollow structure, and the side wall of the anchor rod 31 is provided with a through hole 311 for inserting the puncture needle 61, and the side wall of the puncture needle 61 is provided with a hook groove 611.

[0068] Referring to Figure 9 , the suture 8 is provided with two, made of high molecular material. The two ends of each suture 8 are respectively pre-arranged in two adjacent anchor rods 31, and the end of the suture 8 is knotted with a fisherman knot as a knot prevention knot, and the size of the fisherman knot is larger than the opening of the hook groove 611.

[0069] Referring to Figure 9 , the outer wall of the drive pipe 21 is provided with two line grooves 211 along the axial direction, and the bending part 81 of the suture 8 is accommodated in the line groove 211 and penetrates into the handle 1. When the puncture needle 61 is inserted into the anchor rod 31, the bending part 81 of the suture 8 is pulled to tension the suture 8, and the fisherman knot is slid into and clamped in the hook groove 611 of the puncture needle 61 to achieve reliable capture.

[0070] Referring to Figure 7 and Figure 8 , the line body control assembly 7 is arranged on the handle 1 and is used for tensioning and releasing the suture 8. The line body control assembly 7 includes a control frame 71 vertically slidingly arranged on the outer wall of the handle 1, and a releasable fixing assembly 74 arranged in the control frame 71.

[0071] Referring to Figure 8 , the outer wall of the handle 1 is fixedly connected with a positioning column 72, the positioning column 72 is located below the control frame 71, and a third elastic member 73 is connected between the positioning column 72 and the control frame 71. The third elastic member 73 is a spring. When the control frame 71 vertically slides upward, the third elastic member 73 is stretched, and the elastic force of the third elastic member 73 can reset the control frame 71.

[0072] Referring to Figure 8 , the releasable fixing assembly 74 includes two oppositely movable clamping blocks 741, two positioning rods 743 are arranged between the two clamping blocks 741, and the two ends of the positioning rods 743 are respectively inserted into the side walls at the two ends of the control frame 71, thereby supporting the clamping blocks 741.

[0073] Referring to Figure 8 , the releasable fixing assembly 74 further includes a trigger mechanism for driving the two clamping blocks 741 to move towards each other. The trigger mechanism includes a tension spring 744 arranged between the two clamping blocks 741, and the tension spring 744 is in a compressed state, so that the two clamping blocks 741 can slide towards each other on the positioning rods 743. The trigger mechanism further includes an adjusting block 745 arranged between the two clamping blocks 741, the two side walls of the adjusting block 745 are provided with clamping grooves, and one end of each clamping block 741 towards the adjusting block 745 is fixedly connected with an abutting edge 746 clamped in the clamping groove. The end of the adjusting block 745 is connected with a button 747 penetrating out of the outer wall of the control frame 71, one end of the adjusting block 745 close to the button 747 is provided with a guide inclined surface, and the cross-sectional area of one end of the adjusting block 745 towards the button 747 gradually decreases.

[0074] With reference to Figure 8 , the end of the clamping block 741 away from the adjusting block 745 is fixedly connected with a locking rod 742, and the two side walls of the control frame 71 are both provided with a lock hole 711 for the locking rod 742 to extend into. The outer wall of the handle 1 is provided with a line hole 12 for the suture 8 to pass out, and the bent part 81 of the suture 8 passes out of the line hole 12 and is arranged around the locking rod 742.

[0075] In a natural state, the tension spring 744 provides tension for the two clamping blocks 741 to clamp the adjusting block 745, at this time the locking rod 742 just inserts into the lock hole 711.

[0076] With reference to Figure 8 , when the control frame 71 slides towards the direction away from the needle 9, the locking rod 742 pulls the suture 8, so as to tension the suture 8, and the fisherman knot slides into and clamps in the hook groove 611 of the puncture needle 61. Then press the button 747, the abutting surface 746 slides out of the clamping groove and moves on the guide inclined surface of the adjusting block 745, at this time the two clamping blocks 741 slide towards each other on the positioning rod 743, and the locking rod 742 moves along the movement direction of the clamping block 741, so as to pass out of the lock hole 711, the locking rod 742 separates from the side wall of the control frame 71, and the bent part 81 of the suture 8 falls off from the locking rod 742.

[0077] With reference to Figure 10 , and the puncture needle 61 pulls out the suture 8 from the blood vessel wall when it is withdrawn from the blood vessel, the bent part 81 of the suture 8 enters the blood vessel, and then the end part of the suture 8 is taken off from the puncture needle 61 and is knotted and locked, so as to suture the wound.

[0078] The implementation principle of the vascular suture device in the embodiment of the application is as follows: the instrument is sent to the blood vessel puncture port along the guide wire, the main push button 43 drives the driving pipe 21 to move forward through the push frame 41, and the driving pipe 21 pushes the sliding pipe 32. When the sliding pipe 32 moves forward, the guide inclined surface of the anchor rod 31 interacts with the edge of the containing groove 91 of the needle 9, so as to force the anchor rod 31 to rotate around the connecting ring 34, and the anchor rod 31 extends radially from the hole 22 and is X-shapedly unfolded in the blood vessel. Continue to push the main push button 43 to the end of the sliding hole, and then rotate the main push button 43 into the locking hole, the push frame 41 will compress the second elastic member 47, the elastic force of which pushes the fixed cylinder 48 and the locking rod 51 to move forward, the locking rod 51 inserts into the locking groove of the locking pipe 52, the locking pipe 52 and the locking block 53 move forward, and the inclined surface of the locking block 53 contacts the anchor rod 31 and presses it to be locked, so as to prevent it from retracting.

[0079] Pushing forward the puncture push rod 623, the puncture needle seat 622 and the four puncture needles 61 are driven to move out of the puncture hole 23 along the inclined path, pierce the blood vessel wall, and accurately insert into the through hole 311 of the corresponding anchor rod 31. At this time, the end of the suture line (with a fisherman knot) pre-arranged in the anchor rod 31 is just located near the hook groove 611 of the puncture needle 61.

[0080] When the push control frame 71 is pushed to slide towards the direction away from the needle head 9, the locking rod 742 pulls the suture line 8, thereby straightening the suture line 8, and the fisherman knot slides into and clamps in the hook groove 611. Pressing the button 747 again, the abutting surface 746 slides out of the clamping groove and moves on the guide inclined surface of the adjusting block 745. At this time, the two clamping blocks 741 slide towards each other on the positioning rod 743, and the locking rod 742 moves along the movement direction of the clamping block 741, thereby moving out of the locking hole 711, and the bent part 81 of the suture line 8 is separated from the locking rod 742.

[0081] Pulling backward the puncture push rod 623, the puncture needle 61 with the captured end of the suture line 8 is withdrawn, the end of the suture line 8 is pulled out of the anchor rod 31, and finally the four ends of the suture line 8 are completely pulled out to the outside of the body. Under the action of the pulling force of the puncture needle 61, the bent part 81 of the suture line 8 moves towards the inside of the blood vessel lumen, until the bent part 81 of the suture line 8 enters the blood vessel lumen of the puncture hole. At this time, the bent part 81 of the suture line 8 is retained in the blood vessel lumen and across the puncture hole, and the two ends of the suture line 8 are pulled out from the blood vessel wall on both sides of the puncture hole. The two ends of the suture line 8 are knotted, and the wound can be sutured.

[0082] Rotating the main push button 43 to the sliding hole, the first elastic member 46 pushes the driving push frame 41 to return to the original position, the driving tube 21 and the sliding tube 32 move backward, and the second elastic member 47 pulls the locking rod 51 to move backward. The anchor rod 31 is reset to the outer tube 2 under the action of the elastic reset member 92 in the needle head 9. Finally, the entire instrument is withdrawn to the outside of the body along the suture line, at this time, the two suture lines pass through the blood vessel wall with four U-shaped line feet.

[0083] In the outside of the body, according to the puncture hole, the two ends of the same suture line are knotted to form a double-line parallel suture mode (refer to Figure 11 ). Or the four ends of the two suture lines are cross-knotted to form a cross suture (refer to Figure 12 ), the knot is pushed to the outside wall of the blood vessel and locked by using a knot pusher, and the excess suture line is cut off, and the closure of the puncture hole is completed.

[0084] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present 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. 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) that is 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) that passes through the L-shaped guide groove (44) is connected to the pusher (41). 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. 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).

2. The vascular suture device according to claim 1, 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.

3. The vascular suture device according to claim 2, 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.

4. The vascular suture device according to claim 1, 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).

5. 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).

6. 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).

7. The vascular suture device according to claim 6, 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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