A vascular anastomosis device and its usage method

Abstract

The present invention relates to the technical field of medical devices, and specifically provides a vascular anastomosis device, which includes an operating handle, a vascular suture and dilatation assembly, a fixing assembly, and a quick-release assembly. In the present invention, the movable insertion rod is inserted into the blood vessel insertion tube, so that the side support members expand the first and second rubber outer sheaths, respectively expanding the suture ends of the artificial blood vessel and the native blood vessel. The suture ends are in contact and have the same suture port diameter, which facilitates blood vessel suture, simplifies the suture process, improves the efficiency of blood vessel suture, and shortens the operation time. The present invention uses a torsion spring and a clamping block for fixation to enhance the stability of the side support members, firmly support the artificial blood vessel and the native blood vessel, facilitate the suture operation, and solve the problem that the unstable fixation of the blood vessel affects the suture. The blood vessel insertion tube of the present invention can be inserted and disassembled with the operating handle, which is convenient for disassembly and cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a vascular anastomosis device and a method for using the same. Background Art

[0002] The most effective treatment for aneurysms and aortic dissections in the ascending aorta and aortic arch is artificial vascular replacement. From a surgical technical perspective, vascular anastomosis is the key to a successful operation. How to quickly and efficiently complete vascular anastomosis and effectively shorten the intraoperative circulatory arrest time is an important factor in improving the success rate of surgery and reducing postoperative complications.

[0003] At present, the anastomosis method of artificial blood vessels mainly adopts the traditional manual suture anastomosis method, which is safe, accurate and reliable. However, suture anastomosis has relatively high technical requirements for surgeons. The uniformity of needle distance and margin directly affects whether bleeding occurs and the severity of bleeding after the anastomosis. In addition, manual anastomosis is relatively time-consuming. In order to improve the success rate of vascular anastomosis and surgical efficiency, clinical experts and experts in the field of materials science have tried to achieve the anastomosis of artificial blood vessels and artificial blood vessels, and artificial blood vessels and autologous blood vessels through anastomosis instruments. Summary of the invention

[0004] To address the deficiencies in the above-mentioned prior art, the present invention provides a vascular anastomosis device, comprising: an operating handle, a blood vessel insertion tube is provided at the bottom of the operating handle; a blood vessel suturing and stretching assembly, comprising a plurality of mounting through holes opened on the outside of the blood vessel insertion tube, a side support piece is inserted inside each of the mounting through holes, a first rubber outer sheath is fixedly installed on the outsides of the plurality of side support pieces located at the top, and a second rubber outer sheath is fixedly installed on the outsides of the plurality of side support pieces located at the bottom, a movable through hole on the upper surface of the operating handle, a movable insertion rod in contact with the side support piece is inserted inside the movable through hole, and an operating end is fixedly connected to the upper end of the movable insertion rod; a fixing assembly is provided at the top of the operating handle, and is used to fix the operating end and the movable insertion rod to ensure stability when the blood vessel is stretched; a quick-release assembly is provided between the operating handle and the blood vessel insertion tube, and is used to realize a quick-release function between the operating handle and the blood vessel insertion tube, which is helpful for postoperative disinfection work.

[0005] It is further configured that the first rubber outer sheath and the second rubber outer sheath are both fixedly connected to the blood vessel insertion tube, and the first rubber outer sheath and the second rubber outer sheath are fixedly connected to each other, and both ends of the first rubber outer sheath and the second rubber outer sheath are truncated cone structures.

[0006] It is further provided that a guide slot is symmetrically provided on the inner side of the movable through hole, and a guide convex strip is symmetrically fixedly installed on the outer side of the movable insertion rod, and the guide convex strip is slidably connected to the guide slot.

[0007] Further setting, the fixing component includes a clamping groove opened on the outer side of the operating end. An installation groove is opened on the upper surface of the operating handle. The bottom of the inner cavity of the installation groove is rotationally connected to a connecting shaft, and the upper end of the connecting shaft is fixedly connected to a clamping block that is engaged with the clamping groove.

[0008] Further setting, the fixing component further includes a torsion spring arranged on the outer side of the connecting shaft. The upper end of the torsion spring is fixedly connected to the clamping block, and the lower end of the torsion spring is rotationally connected to the operating handle.

[0009] Further setting, the movable insertion rod includes an insertion rod end arranged at the lower end. The insertion rod end has a hemispherical structure. The blood vessel insertion tube includes an insertion tube end arranged at the lower end. The insertion tube end has a hollow hemispherical structure.

[0010] Further setting, the quick-release component includes two connecting grooves opened on the lower surface of the operating handle. Connecting blocks are symmetrically and fixedly installed on the outer side of the blood vessel insertion tube. Each connecting block is inserted into the connecting groove, and a pinning hole is opened on one side of each connecting block.

[0011] Further setting, the quick-release component further includes an external convex strip. Tensile springs are fixedly installed on the inner sides of the external convex strips. One ends of the two tensile springs are commonly fixedly connected to the external convex strip; on one side of the external convex strip, pinning rods communicated with the connecting grooves are symmetrically and fixedly installed. Each pinning rod is communicated with the pinning hole.

[0012] Further setting, the pinning rod is located inside the tensile spring, and the two pinning rods and the external convex strip are connected to form a U-shaped structure. The connecting block has an L-shaped structure.

[0013] The present invention also provides a using method of the above blood vessel anastomosis device, including the following steps:

[0014] S1. Assemble the operating handle and the blood vessel insertion tube. By operating the external convex strip, the connecting block connected to the blood vessel insertion tube is inserted into the connecting groove opened on the operating handle, and by using the elastic pulling force of the tensile spring, the pinning rod is inserted into the pinning hole opened on the connecting block, so that the connection between the operating handle and the blood vessel insertion tube is fixed;

[0015] S2. Insert the blood vessel insertion tube into the suture ends of the artificial blood vessel and the human own blood vessel. At this time, neither the first rubber outer sheath nor the second rubber outer sheath is in a bulging state. The first rubber outer sheath is located inside the suture end of the artificial blood vessel, and the second rubber outer sheath is located inside the suture end of the human own blood vessel, and the suture end of the artificial blood vessel contacts the suture end of the human own blood vessel;

[0016] S3, the clamping block is moved at a certain angle to make the torsion spring elastically deformed, and the movable insertion rod is inserted into the operating handle and the blood vessel insertion tube by holding the operating end, and the guide convex strip is slidably connected with the guide sliding groove;

[0017] S4, continue to push the operating end until the end of the insertion rod is located inside the end of the insertion tube, the operating end contacts the operating handle, the end of the insertion rod first contacts the side support member, and then under the joint action of the movable insertion rod, the multiple side support members are forced to diverge, and the first rubber outer sheath and the second rubber outer sheath are propped up. At this time, the first rubber outer sheath props up the suture end of the artificial blood vessel, and the second rubber outer sheath props up the suture end of the person's own blood vessel, and the caliber is the same as that of the first rubber outer sheath propping up the suture end of the artificial blood vessel;

[0018] S5, loosen the clamping block. At this time, under the elastic deformation capacity of the torsion spring, the clamping block is clamped into the clamping groove provided at the operating end, so that the movable insertion rod is fixed, thereby ensuring the stability of the artificial blood vessel and the person's own blood vessel.

[0019] S6, suturing the suture ends of the artificial blood vessel and the human blood vessel, wherein the suture position is located at the annular groove formed between the first rubber outer sheath and the second rubber outer sheath;

[0020] S7. After suturing is completed, the fixing block is operated again to free it from the restriction on the position of the operating end, and the movable insertion rod is pulled out from the interior of the blood vessel insertion tube, so that it no longer contacts the side support member, so that the first rubber outer sheath and the second rubber outer sheath no longer bulge, and the diameter becomes smaller, so that the blood vessel insertion tube can be easily pulled out from the interior of the artificial blood vessel and the person's own blood vessel.

[0021] Beneficial effects of the present invention:

[0022] The present invention inserts a movable insertion rod into a blood vessel insertion tube, so that the side support member opens the first rubber outer sheath and the second rubber outer sheath, respectively opening the suture ends of the artificial blood vessel and the native blood vessel, the suture ends are in contact and have the same suture port diameters, which facilitates blood vessel suturing, simplifies the suturing process, improves blood vessel suturing efficiency, and shortens the operation time.

[0023] The present invention inserts a movable insertion rod into an operating handle and fixes it with a torsion spring and a clamping block, thereby enhancing the stability of the side support member, firmly supporting the artificial blood vessel and the own blood vessel, facilitating suturing operation, and solving the problem that loose blood vessel fixation affects suturing.

[0024] The blood vessel insertion tube and the operating handle of the present invention can be plugged in and disassembled, so they are easy to disassemble and clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2Schematic three-dimensional structure diagram of the connection of the first rubber outer sheath, the second rubber outer sheath, the movable insertion rod and the side support member of the present invention;

[0027] Figure 3 Partial enlarged view of part A of the present invention;

[0028] Figure 4 Schematic three-dimensional structure diagram of the connection between the movable insertion rod and the operating handle of the present invention;

[0029] Figure 5 Overall three-dimensional view of the present invention;

[0030] Figure 6 Left view structure diagram of the connection between the movable insertion rod and the operating handle of the present invention;

[0031] Figure 7 Partial enlarged view of part B of the present invention.

[0032] Reference numerals in the figure: 1, operating end; 2, operating handle; 3, external rib; 4, blood vessel insertion tube; 5, first rubber outer sheath; 6, second rubber outer sheath; 7, movable insertion rod; 8, side support member; 9, end of the insertion rod; 10, installation through hole; 11, pinning rod; 12, tension spring; 13, connecting block; 14, connecting groove; 15, movable through hole; 16, guiding chute; 17, guiding rib; 18, pinning hole; 19, end of the insertion tube; 20, installation groove; 21, connecting shaft; 22, clamping groove; 23, torsion spring; 24, clamping block. Detailed implementation mode

[0033] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Typical embodiments of the present invention are shown in the drawings.

[0034] Embodiment 1

[0035] As Figures 1-7As shown, a vascular anastomosis device of the present invention comprises: an operating handle 2, a blood vessel insertion tube 4 is arranged at the bottom of the operating handle 2; a blood vessel suturing and stretching assembly, comprising a plurality of mounting through holes 10 opened on the outside of the blood vessel insertion tube 4, a side support piece 8 is inserted inside each mounting through hole 10, a first rubber outer sheath 5 is fixedly installed on the outside of the plurality of side support pieces 8 located at the top, and a second rubber outer sheath 6 is fixedly installed on the outside of the plurality of side support pieces 8 located at the bottom, a movable through hole 15 on the upper surface of the operating handle 2, a movable insertion rod 7 in contact with the side support piece 8 is inserted inside the movable through hole 15, and an operating end 1 is fixedly connected to the upper end of the movable insertion rod 7; a fixing assembly is arranged at the top of the operating handle 2, and is used to fix the operating end 1 and the movable insertion rod 7 to ensure stability when the blood vessel is stretched; a quick-release assembly is arranged between the operating handle 2 and the blood vessel insertion tube 4, and is used to realize the quick-release function between the operating handle 2 and the blood vessel insertion tube 4, which is helpful for postoperative disinfection.

[0036] During implementation, by inserting the vascular insertion tube 4 into the suture end of the artificial blood vessel and the person's own blood vessel, and inserting the movable insertion rod 7 into the operating handle 2 and the interior of the vascular insertion tube 4, the multiple side support members 8 are forced to spread out, and the first rubber outer sheath 5 and the second rubber outer sheath 6 are propped up. At this time, the first rubber outer sheath 5 props up the suture end of the artificial blood vessel, and the second rubber outer sheath 6 props up the suture end of the person's own blood vessel, and the caliber of the suture end of the artificial blood vessel is the same as that of the first rubber outer sheath 5, thereby facilitating the suturing of the artificial blood vessel and the person's own blood vessel.

[0037] like Figure 2 As shown, the first rubber outer sheath 5 and the second rubber outer sheath 6 are both fixedly connected to the blood vessel insertion tube 4, and the first rubber outer sheath 5 and the second rubber outer sheath 6 are fixedly connected to each other, and both ends of the first rubber outer sheath 5 and the second rubber outer sheath 6 are truncated cone structures.

[0038] like Figure 4 and 7 As shown, a guide slot 16 is symmetrically provided on the inner side of the movable through hole 15 , and a guide ridge 17 is symmetrically fixedly installed on the outer side of the movable insertion rod 7 , and the guide ridge 17 is slidably connected to the guide slot 16 .

[0039] like Figures 4-7As shown in the figure, the fixing component includes a clamping groove 22 formed on the outer side of the operating end 1. An installation groove 20 is formed on the upper surface of the operating handle 2. The bottom of the inner cavity of the installation groove 20 is rotatably connected to a connecting shaft 21. The upper end of the connecting shaft 21 is fixedly connected to a clamping block 24 that engages with the clamping groove 22. The fixing component further includes a torsion spring 23 arranged on the outer side of the connecting shaft 21. The upper end of the torsion spring 23 is fixedly connected to the clamping block 24, and the lower end of the torsion spring 23 is rotatably connected to the operating handle 2. By inserting the movable insertion rod 7 completely into the operating handle 2 and utilizing the elastic deformation ability of the torsion spring 23, the clamping block 24 connected thereto through the connecting shaft 21 is clamped inside the clamping groove 22, thereby facilitating the connection and fixation between the movable insertion rod 7 and the operating handle 2, achieving the effect of fixing the side support member 8, and enhancing the firmness of the first rubber outer sheath 5 and the second rubber outer sheath 6 in supporting the artificial blood vessel and the human own blood vessel respectively.

[0040] As Figure 2 and Figure 5 shown in the figure, the movable insertion rod 7 includes an insertion rod end 9 arranged at the lower end. The insertion rod end 9 has a hemispherical structure. The blood vessel insertion tube 4 includes an insertion tube end 19 arranged at the lower end. The insertion tube end 19 has a hollow hemispherical structure.

[0041] As Figures 4-7 shown in the figure, the quick-release component includes two connecting grooves 14 formed on the lower surface of the operating handle 2. Connecting blocks 13 are symmetrically and fixedly installed on the outer side of the blood vessel insertion tube 4. Each connecting block 13 is inserted into the connecting groove 14. A pinning hole 18 is formed on one side of each connecting block 13. The quick-release component further includes an external convex strip 3. Tensile springs 12 are fixedly installed on the inner sides of the external convex strip 3. One ends of the two tensile springs 12 are fixedly connected together on the external convex strip 3. On one side of the external convex strip 3, pinning rods 11 communicating with the connecting grooves 14 are symmetrically and fixedly installed. Each pinning rod 11 communicates with the pinning hole 18. The pinning rods 11 are located inside the tensile springs 12, and the two pinning rods 11 and the external convex strip 3 are connected to form a U-shaped structure. The connecting block 13 has an L-shaped structure.

[0042] During implementation, the blood vessel insertion tube 4 and the operating handle 2 are inserted and connected through the connecting blocks 13 and the connecting grooves 14. By pulling the external convex strip 3, the tensile springs 12 are stretched, and one end of the pinning rod 11 connected thereto is disengaged from the inside of the pinning hole 18 formed on the connecting block 13, thereby facilitating the extraction of the connecting block 13 from the inside of the connecting groove 14, facilitating the disassembly between the blood vessel insertion tube 4, the movable insertion rod 7, and the operating handle 2, and facilitating the cleaning work.

[0043] A method for using a blood vessel anastomosis device includes the following steps:

[0044] S1. Assemble the operating handle 2 and the blood vessel insertion tube 4, and insert the connection block 13 connected to the blood vessel insertion tube 4 into the connection groove 14 provided in the operating handle 2 by operating the external convex strip 3, and use the elastic tension of the tension spring 12 to insert the pin fixing rod 11 into the pin fixing hole 18 provided in the connection block 13, so that the operating handle 2 and the blood vessel insertion tube 4 are connected and fixed;

[0045] S2, inserting the blood vessel insertion tube 4 into the sutured ends of the artificial blood vessel and the person's own blood vessel, at which time the first rubber outer sheath 5 and the second rubber outer sheath 6 are not in an inflated state, the first rubber outer sheath 5 is located inside the sutured end of the artificial blood vessel, and the second rubber outer sheath 6 is located inside the sutured end of the person's own blood vessel, and the sutured end of the artificial blood vessel is in contact with the sutured end of the person's own blood vessel;

[0046] S3, pull the clamping block 24 to a certain angle to make the torsion spring 23 elastically deformed, and hold the operating end 1 to insert the movable insertion rod 7 into the operating handle 2 and the blood vessel insertion tube 4, at this time, the guide convex strip 17 is slidably connected with the guide slide groove 16;

[0047] S4, continue to push the operating end 1 until the insertion rod end 9 is located inside the insertion tube end 19, the operating end 1 is in contact with the operating handle 2, the insertion rod end 9 first contacts the side support member 8, and then under the joint action of the movable insertion rod 7, the multiple side support members 8 are forced to diverge, and the first rubber outer sheath 5 and the second rubber outer sheath 6 are propped up. At this time, the first rubber outer sheath 5 props up the suture end of the artificial blood vessel, and the second rubber outer sheath 6 props up the suture end of the human body's own blood vessel, and the caliber is the same as that of the first rubber outer sheath 5 propping up the suture end of the artificial blood vessel;

[0048] S5, loosen the clamping block 24. At this time, under the elastic deformation capacity of the torsion spring 23, the clamping block 24 is clamped into the clamping groove 22 provided in the operating end 1, so that the movable insertion rod 7 is fixed, ensuring the stability of the artificial blood vessel and the person's own blood vessel.

[0049] S6, suturing the suture ends of the artificial blood vessel and the human blood vessel, wherein the suture position is located at the annular groove formed between the first rubber outer sheath 5 and the second rubber outer sheath 6;

[0050] S7. After suturing is completed, the fixing block 24 is operated again to free it from the restriction on the position of the operating end 1, and the movable insertion rod 7 is pulled out from the interior of the blood vessel insertion tube 4, so that it no longer contacts the side support member 8, so that the first rubber outer sheath 5 and the second rubber outer sheath 6 are no longer inflated, and the diameter becomes smaller, so that the blood vessel insertion tube 4 is easily pulled out from the interior of the artificial blood vessel and the human body's own blood vessel.

[0051] When the present technical solution is used, the operating handle 2 is first assembled with the blood vessel insertion tube 4, and the connecting block 13 connected with the blood vessel insertion tube 4 is inserted into the connecting groove 14 provided in the operating handle 2 by operating the external convex strip 3, and the pin fixing rod 11 is inserted into the pin fixing hole 18 provided in the connecting block 13 by utilizing the elastic tension of the tension spring 12, so that the operating handle 2 and the blood vessel insertion tube 4 are connected and fixed, and then the blood vessel insertion tube 4 is inserted into the suture end of the artificial blood vessel and the human body's own blood vessel, at this time, the first rubber outer sheath 5 and the second rubber outer sheath 6 are not in a bulging state, The first rubber outer sheath 5 is located inside the suture end of the artificial blood vessel, and the second rubber outer sheath 6 is located inside the suture end of the person's own blood vessel, and the suture end of the artificial blood vessel contacts the suture end of the person's own blood vessel. Then, the clamping block 24 is pulled at a certain angle to elastically deform the torsion spring 23, and the operating end 1 is held to insert the movable insertion rod 7 into the operating handle 2 and the blood vessel insertion tube 4. At this time, the guide convex strip 17 is slidably connected with the guide slide groove 16, and then the operating end 1 is continued to be pushed until the insertion rod end 9 is located inside the insertion tube end 19, the operating end 1 is in contact with the operating handle 2, and the insertion rod end The end 9 first contacts the side support member 8, and then under the joint action of the movable insertion rod 7, the multiple side support members 8 are forced to diverge, and the first rubber outer sheath 5 and the second rubber outer sheath 6 are propped up. At this time, the first rubber outer sheath 5 props up the suture end of the artificial blood vessel, and the second rubber outer sheath 6 props up the suture end of the person's own blood vessel, and the caliber of the suture end of the artificial blood vessel propped up by the first rubber outer sheath 5 is the same. Then, the clamping block 24 is released. At this time, under the elastic deformation capacity of the torsion spring 23, the clamping block 24 is clamped into the clamping groove 22 opened at the operating end 1, so that the movable insertion rod 7 is fixed. To ensure the stability of the artificial blood vessel and the person's own blood vessel, the suture ends of the artificial blood vessel and the person's own blood vessel are then sutured, and the suture position is located at the annular groove formed between the first rubber outer sheath 5 and the second rubber outer sheath 6. Finally, after the suturing is completed, the fixing block 24 is operated again to free it from the restriction on the position of the operating end 1, and the movable insertion rod 7 is pulled out from the inside of the blood vessel insertion tube 4, so that it no longer contacts the side support member 8, so that the first rubber outer sheath 5 and the second rubber outer sheath 6 no longer bulge, and the diameter becomes smaller, so that the blood vessel insertion tube 4 is conveniently pulled out from the inside of the artificial blood vessel and the person's own blood vessel.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A vascular anastomosis device, characterized in that, include: An operating handle (2), wherein a blood vessel insertion tube (4) is provided at the bottom of the operating handle (2); A blood vessel suturing and stretching assembly comprises a plurality of mounting through holes (10) provided on the outside of a blood vessel insertion tube (4), a side support member (8) being inserted into the interior of each mounting through hole (10), a first rubber outer sheath (5) being fixedly mounted on the exterior of the plurality of side support members (8) located at the top, and a second rubber outer sheath (6) being fixedly mounted on the exterior of the plurality of side support members (8) located at the bottom, a movable through hole (15) on the upper surface of the operating handle (2), a movable insertion rod (7) being inserted into the interior of the movable through hole (15) and contacting the side support member (8), and an operating end (1) being fixedly connected to the upper end of the movable insertion rod (7); A fixing component is arranged on the top of the operating handle (2) and is used to fix the operating end (1) and the movable insertion rod (7) to ensure stability when the blood vessel is expanded; the fixing component comprises a fixing groove (22) provided on the outside of the operating end (1); a mounting groove (20) is provided on the upper surface of the operating handle (2); a connecting shaft (21) is rotatably connected to the bottom of the inner cavity of the mounting groove (20); the upper end of the connecting shaft (21) is fixedly connected to a fixing block (24) engaged with the fixing groove (22); the fixing component also comprises a torsion spring (23) provided on the outside of the connecting shaft (21); the upper end of the torsion spring (23) is fixedly connected to the fixing block (24), and the lower end of the torsion spring (23) is rotatably connected to the operating handle (2); The quick-release assembly is arranged between the operating handle (2) and the blood vessel insertion tube (4) and is used to realize a quick-release assembly function between the operating handle (2) and the blood vessel insertion tube (4), thereby facilitating postoperative disinfection work.

2. The vascular anastomosis device according to claim 1, characterized in that, The first rubber outer sheath (5) and the second rubber outer sheath (6) are both fixedly connected to the blood vessel insertion tube (4), and the first rubber outer sheath (5) and the second rubber outer sheath (6) are fixedly connected to each other, and both ends of the first rubber outer sheath (5) and the second rubber outer sheath (6) are in a truncated cone structure.

3. The vascular anastomosis device according to claim 2, characterized in that, A guide slot (16) is symmetrically provided on the inner side of the movable through hole (15), and a guide convex strip (17) is symmetrically fixedly installed on the outer side of the movable insertion rod (7), and the guide convex strip (17) is slidably connected to the guide slot (16).

4. The vascular anastomosis device according to claim 3, wherein, The movable insertion rod (7) includes an insertion rod end (9) arranged at the lower end, and the insertion rod end (9) is a hemispherical structure. The blood vessel insertion tube (4) includes an insertion tube end (19) arranged at the lower end, and the insertion tube end (19) is a hollow hemispherical structure.

5. The vascular anastomosis device according to claim 4, characterized in that, The quick-release assembly comprises two connection grooves (14) formed on the lower surface of the operating handle (2); a connection block (13) is symmetrically fixedly mounted on the outer side of the blood vessel insertion tube (4); each of the connection blocks (13) is plugged into the connection groove (14); and a pin fixing hole (18) is formed on one side of the connection block (13).

6. The vascular anastomosis device according to claim 5, wherein, The quick-release assembly further comprises an external convex strip (3), a tension spring (12) being fixedly mounted on the inner side of each of the external convex strips (3), one end of each of the two tension springs (12) being fixedly connected to the external convex strip (3); a pin fixing rod (11) connected to the connecting groove (14) being symmetrically fixedly mounted on one side of the external convex strip (3), each of the pin fixing rods (11) being connected to a pin fixing hole (18).

7. The vascular anastomosis device according to claim 6, characterized in that, The pin fixing rod (11) is located inside the tension spring (12), and the two pin fixing rods (11) are connected to the external convex strip (3) to form a U-shaped structure, and the connecting block (13) is an L-shaped structure.

8. The method for using a vascular anastomosis device according to claim 7, characterized in that, The following steps are involved: S1. Assemble the operating handle (2) and the blood vessel insertion tube (4), operate the external convex strip (3), insert the connecting block (13) connected to the blood vessel insertion tube (4) into the connecting groove (14) provided in the operating handle (2), and use the elastic tension of the tension spring (12) to insert the pin fixing rod (11) into the pin fixing hole (18) provided in the connecting block (13), so that the operating handle (2) and the blood vessel insertion tube (4) are connected and fixed; S2, inserting the blood vessel insertion tube (4) into the sutured ends of the artificial blood vessel and the human blood vessel, at which time the first rubber outer sheath (5) and the second rubber outer sheath (6) are not in an inflated state, the first rubber outer sheath (5) is located inside the sutured end of the artificial blood vessel, and the second rubber outer sheath (6) is located inside the sutured end of the human blood vessel, and the sutured end of the artificial blood vessel is in contact with the sutured end of the human blood vessel; S3, the clamping block (24) is moved at a certain angle to cause the torsion spring (23) to undergo elastic deformation, and the operating end (1) is held to insert the movable insertion rod (7) into the operating handle (2) and the blood vessel insertion tube (4), at which time the guide convex strip (17) is slidably connected to the guide sliding groove (16); S4, continue to push the operating end (1) until the end of the insertion rod (9) is located inside the end of the insertion tube (19), the operating end (1) contacts the operating handle (2), the end of the insertion rod (9) first contacts the side support member (8), and then, under the joint action of the movable insertion rod (7), the plurality of side support members (8) are forced to spread out, propping up the first rubber outer sheath (5) and the second rubber outer sheath (6), at which time the first rubber outer sheath (5) props up the suture end of the artificial blood vessel, and the second rubber outer sheath (6) props up the suture end of the human blood vessel; S5, loosening the clamping block (24), at which point the clamping block (24) is clamped into the clamping groove (22) provided at the operating end (1) under the elastic deformation capacity of the torsion spring (23), so that the movable insertion rod (7) is fixed, thereby ensuring the stability of the artificial blood vessel and the person's own blood vessel being stretched; S6, suturing the suture ends of the artificial blood vessel and the human blood vessel, with the suture position being located at the annular groove formed between the first rubber outer sheath (5) and the second rubber outer sheath (6); S7. After the suture is completed, operate on the clamping block (24) again to release the restriction on the position of the operating end (1), and withdraw the movable insertion rod (7) from the inside of the blood vessel insertion tube (4), so that it no longer contacts the side support member (8), causing the first rubber outer sheath (5) and the second rubber outer sheath (6) to no longer bulge and their diameters to become smaller, facilitating the withdrawal of the blood vessel insertion tube (4) from the inside of the artificial blood vessel and the patient's own blood vessel.

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