Vascular anastomosis stitching instrument

Abstract

The vascular anastomosis stitching instrument comprises a handle, the handle is fixedly connected with a left needle dial with a left butt joint rod and a right needle dial with a right butt joint rod, and the left needle dial and the right needle dial are respectively provided with a plurality of left stitching needles and a plurality of right stitching needles at intervals in the circumferential direction. The left suture needle and the right suture needle which are correspondingly arranged are connected through the same suture line; the handle is further connected with a left needle pushing mechanism used for pushing the left suture needle out of the left butt joint rod and penetrating the left suture needle through the blood vessel wall from inside to outside and a right needle pushing mechanism used for pushing the right suture needle out of the right butt joint rod and penetrating the right suture needle through the blood vessel wall from inside to outside. According to the utility model, not only can the butt joint of blood vessels be realized, but also all left suture needles on the left needle disc and all right suture needles on the right needle disc can penetrate through the blood vessel wall at one time without manually penetrating the needles one by one, so that the difficulty of surgical operation is reduced, the surgical time is shortened, the labor intensity of doctors is reduced, and the working efficiency is improved. The vascular anastomosis level is improved, and healing is promoted.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a vascular anastomosis suture device. Background Art

[0002] In surgical operations, the anastomosis of micro-cavities such as microvessels and lymphatic vessels is a delicate surgical operation. The docking and suturing of the anastomotic ends of blood vessels (including but not limited to blood vessels, lymphatic vessels, etc., the same below) includes two processes, one is the docking of the anastomotic ends of the blood vessels, and the other is suturing. The effects of docking and suturing will directly affect the healing effect.

[0003] In view of this, CN202410019202.4 discloses a vascular suturing auxiliary device, including a flange, which has a coaxially arranged rim, spoke and inner ring, the inner ring is hollow and can cooperate with the blood vessel, the spoke has multiple needle holes evenly arranged along the circumference, the blood vessel wall is turned outward and attached to the spoke, and a straight needle is used to pass through the blood vessel wall and the needle hole while the suture is tied around the flange. Although the aforementioned patent can dock the broken blood vessels well, it requires manual needle insertion through the blood vessel wall one by one, and then knotting and suturing, which is labor-intensive; in addition, after the operation, the flange needs to remain in the patient's body. Although the flange is made of degradable material, there will still be a foreign body sensation, which reduces the comfort. Utility Model Content

[0004] The utility model aims to solve the technical problems existing in the prior art, and the purpose of the utility model is to provide a vascular anastomosis suture device.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a vascular anastomosis suture instrument, comprising a handle, a left needle disk and a right needle disk are fixedly connected to the handle, the left end of the left needle disk has a left docking rod capable of docking with the blood vessel, and the right end of the right needle disk has a right docking rod capable of docking with the blood vessel; a plurality of left suture needles are circumferentially spaced apart on the left needle disk, and a plurality of right suture needles corresponding to the left suture needles are circumferentially spaced apart on the right needle disk, and the correspondingly arranged left suture needles and right suture needles are connected by the same suture thread; the handle is also connected to a left needle pushing mechanism for pushing the left suture needle out of the left docking rod and passing it through the blood vessel wall from the inside to the outside, and a right needle pushing mechanism for pushing the right suture needle out of the right docking rod and passing it through the blood vessel wall from the inside to the outside.

[0006] The above technical solution is convenient for the operator to hold and apply force by setting a handle, and the left needle tray and the right needle tray are fixed on the handle, and suture needles are movably connected thereto, and the two corresponding suture needles on the left needle tray and the right needle tray are connected by the same suture thread, and the left docking rod and the right docking rod are used to dock two broken blood vessels, and the suture needles are pushed out from the docking rod by the needle pushing mechanism, and the needle tips of the suture needles can pass through the blood vessel wall from the inside to the outside. The utility model can not only achieve the docking of blood vessels, but also pass all the left suture needles on the left needle tray through the blood vessel wall at one time, and pass all the right suture needles on the right needle tray through the blood vessel wall at one time, without the need for manual needle threading one by one, thereby reducing the difficulty of surgical operation, reducing the operation time, reducing the labor intensity of doctors, improving the level of vascular anastomosis, and promoting healing; and after the operation, only the suture thread remains in the patient's body, reducing the foreign body sensation and improving the comfort.

[0007] In a preferred embodiment of the present invention, a plurality of left needle holes corresponding to the left suture needle are circumferentially spaced apart on the left needle disk and the right needle disk, a plurality of left needle threading grooves corresponding to and communicating with the left needle hole are circumferentially spaced apart on the left docking rod, and the left suture needle is inserted into the left needle hole and the left needle threading groove; a plurality of right needle holes corresponding to the right suture needle are circumferentially spaced apart on the right needle disk, a plurality of right needle threading grooves corresponding to and communicating with the right needle hole are circumferentially spaced apart on the right docking rod, and the right suture needle is inserted into the right needle hole and the right needle threading groove.

[0008] In the above technical solution, the needle hole and the needle threading groove guide the movement of the suture needle, so that the suture thread can smoothly pass through the blood vessel wall from the inside to the outside.

[0009] In a preferred embodiment of the present invention, the bottoms of the left needle threading groove and the right needle threading groove are both arc-shaped, and the left suture needle and the right suture needle are both arc-shaped; under the limiting action of the left needle hole, the left suture needle can slide to the left and radially outward along the arc-shaped bottom of the left needle threading groove; under the limiting action of the right needle hole, the right suture needle can slide to the right and radially outward along the arc-shaped bottom of the right needle threading groove.

[0010] According to the above technical solution, under the limiting effect of the needle hole, the suture needle can only slide outward and radially outward along the arc-shaped bottom of the needle threading groove; and the bottom of the needle threading groove and the suture needle are both arc-shaped, making the movement of the suture needle smoother.

[0011] In a preferred embodiment of the present invention, the left side of the left needle pushing mechanism has a left arc surface that is concave to the right and can abut against the tail of the left suture needle, and the right side of the right needle pushing mechanism has a right arc surface that is concave to the left and can abut against the tail of the right suture needle.

[0012] In the above technical solution, when the needle pushing mechanism pushes the suture needle out from the docking rod, the tail of the suture needle slides inward on the arc surface, and the sliding is smoother.

[0013] In a preferred embodiment of the utility model, a plurality of wire outlet grooves corresponding to the suture threads are circumferentially spaced on the outer walls of the left needle disk and the right needle disk, and the wire outlet grooves are connected to the left needle hole / right needle hole, and the suture threads can be pulled out from the wire outlet grooves.

[0014] The above technical solution, by providing a wire outlet groove, makes it easy to pull the suture thread in the needle hole out of the needle disk, so as to conveniently remove the needle disk from the suture thread bundle.

[0015] In another preferred embodiment of the present invention, the left needle disk and the right needle disk are both annular structures with a through hole in the middle, the annular structure includes two semicircular rings detachably connected to the left docking rod / right docking rod, and a notch communicating with the left needle hole / right needle hole is provided on the inner wall of the left needle disk / right needle disk, and the suture thread can be pulled out from the notch.

[0016] In the above technical solution, the needle disk is composed of two semicircular rings, which makes it easy to remove the needle disk from the docking rod, and by providing a notch, it is easy to pull the suture thread in the needle hole out of the needle disk through the notch to remove the needle disk from the suture thread bundle.

[0017] In another preferred embodiment of the utility model, the left docking rod has a left conical surface with the large end located on the right side for docking with the blood vessel, and the needle tip of the left suture needle passes through the left conical surface; the right docking rod has a right conical surface with the large end located on the left side for docking with the blood vessel, and the needle tip of the right suture needle passes through the right conical surface.

[0018] In the above technical solution, the conical surface can not only guide, but also clamp the blood vessel smoothly and tightly thereon, thereby preventing the blood vessel from being loosened from the docking rod when the suture needle passes through.

[0019] In another preferred embodiment of the present invention, the left needle pushing mechanism includes a left pushing block slidably connected to the handle and capable of moving along the axial direction of the left needle disk, and the left suture needle can be pushed out from the left docking rod by moving the left pushing block to the left; the right needle pushing mechanism includes a right pushing block slidably connected to the handle and capable of moving along the axial direction of the right needle disk, and the right suture needle can be pushed out from the right docking rod by moving the right pushing block to the right.

[0020] The above technical solution, by providing a left push block and a right push block slidably connected to the handle, can push the left push block to the left to push the left suture needle out of the left docking rod, and push the right push block to the right to push the right suture needle out of the right docking rod, which is simple to operate.

[0021] In another preferred embodiment of the present invention, the side surface of the left push block has a left rack extending along its sliding direction, and the handle is rotatably connected to a left gear engaged with the left rack; the side surface of the right push block has a right rack extending along its sliding direction, and the handle is rotatably connected to a right gear engaged with the right rack.

[0022] The above technical solution, by setting up gears and racks, can push the suture needle out of the docking rod by rotating the gears to move the racks. Compared with directly sliding the push block, the rotation method can more accurately control the distance the push block slides outward and saves more effort.

[0023] In another preferred embodiment of the present invention, a knob located outside the handle is fixedly connected to the left gear and the right gear.

[0024] The above technical solution facilitates the rotation of the gear by setting a knob, making the operation more convenient.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 It is a schematic structural diagram of a vascular anastomosis stapler according to an embodiment.

[0028] Figure 2 It is a partial schematic diagram of the suture needle in the embodiment before it penetrates the blood vessel.

[0029] Figure 3 It is a partial schematic diagram of the suture needle in the embodiment after penetrating the blood vessel.

[0030] Figure 4 It is a structural schematic diagram of a needle disk.

[0031] Figure 5 It is another structural schematic diagram of the needle disk.

[0032] The figure marks in the drawings of the specification include: handle 1, suture thread 2, left needle disk 3, left needle hole 3a, wire outlet groove 3b, through hole 3c, semicircular ring 3d, notch 3e, right needle disk 4, right needle hole 4a, left docking rod 5, left needle threading groove 5a, left conical surface 5b, right docking rod 6, right needle threading groove 6a, right conical surface 6b, left suture needle 7, right suture needle 8, left needle pushing mechanism 9, left arc surface 9a, left push block 91, left rack 92, left gear 93, right needle pushing mechanism 10, right arc surface 10a, right push block 101, right rack 102, right gear 103, blood vessel 11. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0036] The utility model provides a vascular anastomosis suture device, such as Figure 1-Figure 3 As shown, in a preferred embodiment, the vascular anastomosis suture device includes a handle 1, on which a left needle disk 3 and a right needle disk 4 are fixedly arranged at intervals, and the left needle disk 3 and the right needle disk 4 are fixedly connected to the left and right ends of the handle 1 respectively. The left end of the left needle disk 3 has a left docking rod 5 that can dock with the blood vessel 11, and the right end of the right needle disk 4 has a right docking rod 6 that can dock with the blood vessel 11, and the left docking rod 5 and the right docking rod 6 both have a guide portion that is convenient for inserting into the blood vessel 11. A plurality of left suture needles 7 are arranged circumferentially at intervals on the left needle disk 3, and a plurality of right suture needles 8 corresponding to the left suture needles 7 are arranged circumferentially at intervals on the right needle disk 4, and the corresponding left suture needles 7 and right suture needles 8 are connected by the same suture thread 2.

[0037] The handle 1 is also connected with a left needle pushing mechanism 9 for pushing the left suture needle 7 from the left docking rod 5 and passing through the blood vessel wall from the inside to the outside, and a right needle pushing mechanism 10 for pushing the right suture needle 8 from the right docking rod 6 and passing through the blood vessel wall from the inside to the outside. For example, the left needle pushing mechanism 9 includes a left pushing block 91 slidably connected to the handle 1 and capable of moving along the axial direction of the left needle disk 3. By moving the left pushing block 91 to the left, the left suture needle 7 can be pushed out from the left docking rod 5; the right needle pushing mechanism 10 includes a right pushing block 101 slidably connected to the handle 1 and capable of moving along the axial direction of the right needle disk 4. By moving the right pushing block 101 to the right, the right suture needle 8 can be pushed out from the right docking rod 6.

[0038] When in use, the handle 1 is held, and the left docking rod 5 and the right docking rod 6 are docked into the two broken blood vessels 11, and the two blood vessels 11 are respectively sleeved on the left docking rod 5 and the right docking rod 6. By moving the left push block 91 to the left, the left push block 91 presses against the needle tail of the left suture needle 7 (one end of the suture thread 2), and the left suture needle 7 is pushed out from the left docking rod 5, and the needle tip of the left suture needle 7 passes through the blood vessel wall from the inside to the outside; by moving the right push block 101 to the right, the right push block 101 presses against the needle tail of the right suture needle 8, and the right suture needle 8 is pushed out from the right docking rod 6, and the needle tip of the right suture needle 8 passes through the blood vessel wall from the inside to the outside. Then use tweezers to pull the needle tip that has passed through the blood vessel 11 out of the left docking rod 5 and the right docking rod 6, then pull out the left docking rod 5 and the right docking rod 6 from the blood vessel 11, remove the left needle disk 3, the left docking rod 5, the left push block 91, the right needle disk 4, the right docking rod 6 and the right push block 101. Cut the thread on the needle tail, slowly pull the two ends of the suture thread 2, gradually dock the two broken blood vessels 11 together, and tie a knot to complete the anastomosis of the blood vessel 11.

[0039] In the utility model, except for the suture needles (including the left suture needle 7 and the right suture needle 8) and the suture thread 2, other parts can be made of plastic. After assembly, they are sterilized and packaged normally. During surgery, they are unpacked and placed on the operating table.

[0040] In the present invention, the number of sutures 2 can be four, six or eight, depending on the thickness of the blood vessel 11; the material of the suture 2 is natural or synthetic non-absorbable thread, such as nylon thread, polyester thread, polyester thread, polypropylene thread and polyethylene thread. In addition, different specifications can be designed, covering blood vessels 11 with diameters ranging from fine 0.5mm to 4mm, and also covering arteries and veins, lymphatic vessels, lacrimal ducts, pancreatic ducts, thoracic ducts, etc. with diameters ranging from 0.5mm to 4mm. It can also be used for thick tubes other than blood vessels 11, with diameters ranging from 4mm and above to 50mm, such as intestinal tubes and ureters.

[0041] In another preferred embodiment, the side surface of the left push block 91 (the side facing the operator) has a left rack 92 extending along the sliding direction thereof, and the handle 1 is rotatably connected to a left gear 93 meshing with the left rack 92; the side surface of the right push block 101 (the side facing the operator) has a right rack 102 extending along the sliding direction thereof, and the handle 1 is rotatably connected to a right gear 103 meshing with the right rack 102. Preferably, a knob located outside the handle 1 is fixedly connected to the left gear 93 and the right gear 103.

[0042] By turning the left knob to make the left gear 93 rotate counterclockwise, the left gear 93 causes the left rack 92 to drive the left push block 91 to move to the left, so as to push the left suture needle 7 out of the left docking rod 5; by turning the right knob to make the right gear 103 rotate clockwise, the right gear 103 causes the right rack 102 to drive the right push block 101 to move to the right, so as to push the right suture needle 8 out of the right docking rod 6.

[0043] like Figure 2 As shown, in the utility model, a plurality of left needle holes 3a corresponding to the left suture needle 7 are circumferentially spaced apart on the left needle disk 3 and the right needle disk 4, a plurality of left needle threading grooves 5a corresponding to and communicating with the left needle hole 3a are circumferentially spaced apart on the left docking rod 5, and the left suture needle 7 is penetrated in the left needle hole 3a and the left needle threading groove 5a; a plurality of right needle holes 4a corresponding to the right suture needle 8 are circumferentially spaced apart on the right needle disk 4, a plurality of right needle threading grooves 6a corresponding to and communicating with the right needle hole 4a are circumferentially spaced apart on the right docking rod 6, and the right suture needle 8 is penetrated in the right needle hole 4a and the right needle threading groove 6a.

[0044] Among them, the tops of the left needle threading groove 5a and the right needle threading groove 6a are open, the width of the left needle threading groove 5a is adapted to the left suture needle 7, and the width of the right needle threading groove 6a is adapted to the right suture needle 8. Without external force, the left suture needle 7 will not slide out of the left needle threading groove 5a, and the right suture needle 8 will not slide out of the right needle threading groove 6a.

[0045] like Figure 2 As shown, in another preferred embodiment, the groove bottoms of the left needle threading groove 5a and the right needle threading groove 6a are both arc-shaped, and the left suture needle 7 and the right suture needle 8 are both arc-shaped. Under the limiting effect of the left needle hole 3a, the left suture needle 7 can slide leftward and radially outward along the arc-shaped groove bottom of the left needle threading groove 5a to pass through the blood vessel wall from the inside to the outside; under the limiting effect of the right needle hole 4a, the right suture needle 8 can slide rightward and radially outward along the arc-shaped groove bottom of the right needle threading groove 6a to pass through the blood vessel wall from the inside to the outside.

[0046] like Figure 2As shown, the specific limiting effect of the left needle hole 3a on the left suture needle 7 is as follows: the left end of the inner surface of the left needle hole 3a (the side close to the center of the left needle disk 3) abuts against the inner surface of the left suture needle 7, and the right end of the outer surface of the left needle hole 3a (the side close to the outer wall of the left needle disk 3) abuts against the outer surface of the left suture needle 7, so that the left suture needle 7 can only slide to the left and radially outward along the arc-shaped groove bottom of the left needle threading groove 5a. Similarly, the specific limiting effect of the right needle hole 4a on the right suture needle 8 is as follows: the right end of the inner surface of the right needle hole 4a abuts against the inner surface of the right suture needle 8, and the left end of the outer surface of the right needle hole 4a abuts against the outer surface of the right suture needle 8, so that the right suture needle 8 can only slide to the right and radially outward along the arc-shaped groove bottom of the right needle threading groove 6a.

[0047] like Figure 2 As shown, further preferably, the left side of the left pushing block 91 of the left needle pushing mechanism 9 has a left arc surface 9a which is recessed to the right and can abut against the tail of the left suture needle 7. When the left pushing block 91 pushes the left suture needle 7 out from the left docking rod 5, the tail of the left suture needle 7 slides inward on the left arc surface 9a, and the sliding is smoother; the right side of the right needle pushing mechanism 10 has a right arc surface 10a which is recessed to the left and can abut against the tail of the right suture needle 8. The tail of the right suture needle 8 slides inward on the right arc surface 10a, and the sliding is smoother.

[0048] like Figure 2 and Figure 3 As shown, in another preferred embodiment, the left docking rod 5 has a left conical surface 5b with a large end located on the right side for docking with the blood vessel 11, and the needle tip of the left suture needle 7 passes through the left conical surface 5b; the right docking rod 6 has a right conical surface 6b with a large end located on the left side for docking with the blood vessel 11, and the needle tip of the right suture needle 8 passes through the right conical surface 6b. The left conical surface 5b and the right conical surface 6b allow the blood vessel 11 to be clamped thereon smoothly and tightly, so as to prevent the blood vessel 11 from being loosened from the left docking rod 5 and the right docking rod 6 when the left suture needle 7 and the right suture needle 8 pass through.

[0049] like Figure 4 As shown, in order to facilitate the removal of the left needle disk 3 and the right needle disk 4 from the bundle of sutures 2, in one embodiment, a plurality of outlet grooves 3b corresponding to the sutures 2 are provided on the outer walls of the left needle disk 3 and the right needle disk 4 at circumferential intervals, and the outlet grooves 3b are connected with the left needle hole 3a / the right needle hole 4a, and the width of the outlet grooves 3b is adapted to the sutures 2, so that the sutures 2 can be pulled out from the outlet grooves 3b. After all the sutures 2 are pulled out from the left needle disk 3 and the right needle disk 4 through the outlet grooves 3b, the left needle disk 3 and the right needle disk 4 can be removed from the bundle of sutures 2, and then the left docking rod 5, the left push block 91, the right docking rod 6 and the right push block 101 can be taken out from the bundle of sutures 2.

[0050] like Figure 5As shown, in another embodiment, the left needle disk 3 and the right needle disk 4 are both annular structures with a through hole 3c in the middle, and the annular structure includes two semicircular rings 3d detachably connected (such as clamped) to the left docking rod 5 / right docking rod 6, and the inner wall of the left needle disk 3 / right needle disk 4 is provided with a notch 3e communicating with the left needle hole 3a / right needle hole 4a, and the suture 2 can be pulled out from the notch 3e. Remove the two semicircular rings 3d from the left docking rod 5, and pull the suture 2 out of the left needle hole 3a through the notch 3e, so as to facilitate the removal of the left needle disk 3 from the suture 2 bundle, and similarly, the right needle disk 4 can also be removed.

[0051] In the description of this specification, the description with reference to the terms "preferred embodiment", "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vascular anastomosis stapler, characterized in that: It comprises a handle, on which a left needle disk and a right needle disk are fixedly connected and arranged at intervals, the left end of the left needle disk has a left docking rod capable of docking with a blood vessel, and the right end of the right needle disk has a right docking rod capable of docking with a blood vessel; The left needle disk is provided with a plurality of left suture needles at intervals in the circumferential direction, and the right needle disk is provided with a plurality of right suture needles corresponding to the left suture needles at intervals in the circumferential direction, and the corresponding left suture needles and right suture needles are connected by the same suture thread; The handle is also connected with a left needle pushing mechanism for pushing the left suture needle out of the left docking rod and passing through the blood vessel wall from the inside to the outside, and a right needle pushing mechanism for pushing the right suture needle out of the right docking rod and passing through the blood vessel wall from the inside to the outside.

2. A vascular anastomosis stapler according to claim 1, characterized in that: The left needle disk and the right needle disk are both provided with a plurality of left needle holes corresponding to the left suture needle at circumferential intervals, and the left docking rod is provided with a plurality of left needle threading grooves corresponding to and communicating with the left needle holes at circumferential intervals, and the left suture needle is inserted into the left needle hole and the left needle threading groove; The right needle disk is provided with a plurality of right needle holes corresponding to the right suture needle at circumferential intervals, the right docking rod is provided with a plurality of right needle threading grooves corresponding to and communicating with the right needle holes at circumferential intervals, and the right suture needle is inserted in the right needle hole and the right needle threading groove.

3. A vascular anastomosis stapler according to claim 2, characterized in that: The bottoms of the left needle threading groove and the right needle threading groove are both arc-shaped, and the left suture needle and the right suture needle are both arc-shaped; Under the limiting effect of the left needle hole, the left suture needle can slide leftward and radially outward along the arc-shaped groove bottom of the left needle threading groove; Under the limiting effect of the right needle hole, the right suture needle can slide rightward and radially outward along the arc-shaped groove bottom of the right needle threading groove.

4. A vascular anastomosis stapler according to claim 3, characterized in that: The left side of the left needle pushing mechanism has a left arc surface that is recessed to the right and can abut against the tail of the left suture needle, and the right side of the right needle pushing mechanism has a right arc surface that is recessed to the left and can abut against the tail of the right suture needle.

5. A vascular anastomosis stapler according to any one of claims 2 to 4, characterized in that: The outer walls of the left needle disk and the right needle disk are provided with a plurality of outlet grooves corresponding to the suture threads at circumferential intervals, the outlet grooves are connected with the left needle hole / right needle hole, and the suture threads can be pulled out from the outlet grooves.

6. A vascular anastomosis stapler according to any one of claims 2 to 4, characterized in that: The left needle disk and the right needle disk are both annular structures with a through hole in the middle. The annular structure includes two semicircular rings detachably connected to the left docking rod / right docking rod. A notch communicating with the left needle hole / right needle hole is provided on the inner wall of the left needle disk / right needle disk, and the suture thread can be pulled out from the notch.

7. A vascular anastomosis stapler according to any one of claims 1 to 4, characterized in that: The left docking rod has a left conical surface with a large end located on the right side for docking with the blood vessel, and the needle tip of the left suture needle passes through the left conical surface; The right docking rod is provided with a right conical surface with a large end located on the left side for docking with the blood vessel, and the needle tip of the right suture needle passes through the right conical surface.

8. A vascular anastomosis stapler according to any one of claims 1 to 4, characterized in that: The left needle pushing mechanism comprises a left pushing block slidably connected to the handle and capable of moving along the axial direction of the left needle disk. By moving the left pushing block to the left, the left suture needle can be pushed out from the left docking rod; The right needle pushing mechanism comprises a right pushing block which is slidably connected to the handle and can move along the axial direction of the right needle disk. By moving the right pushing block to the right, the right suture needle can be pushed out from the right docking rod.

9. A vascular anastomosis stapler according to claim 8, characterized in that: The side surface of the left push block is provided with a left rack extending along the sliding direction thereof, and the handle is rotatably connected with a left gear meshing with the left rack; The side surface of the right push block is provided with a right rack extending along the sliding direction thereof, and the handle is rotatably connected with a right gear meshing with the right rack.

10. The vascular anastomosis stapler according to claim 9, characterized in that: The left gear and the right gear are fixedly connected with a knob located outside the handle.

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