Blood vessel anastomat

Abstract

The invention discloses a blood vessel anastomat in the technical field of medical instruments, which comprises a catheter, an annular bump is fixedly connected to the periphery of the middle of the catheter, a cavity is formed in the annular bump, a cross thread ring is slidably sleeved to the center of the cavity, cross threads are formed on the inner wall of the cross thread ring, and anastomosis heads are communicated to two ends of the catheter. A plurality of fish scale spine plates are laid on the outer walls of the flow guide pipe and the anastomosis head. The catheter is novel and efficient, the catheter body is firmly in butt joint with the broken end of a small blood vessel through the fish scale spine plate, the blood guiding effect is achieved, the eversion piece on the catheter body is pushed and turned, the eversion blood vessel wall area is enlarged, the eversion piece annularly pierces the blood vessel wall and is locked and matched with the blood vessel wall, and the blood vessel anastomosis operation efficiency is improved; and overlapping anastomosis of broken ends of blood vessels is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, in particular to a vascular anastomosis device. Background Art

[0002] The development of vascular suturing technology has a long history. As early as 1902, Alexis Carrel proposed the technology of manual needle and thread suturing of blood vessels, and won the Nobel Prize in Physiology or Medicine in 1912. Although manual suturing technology has the advantages of precise clinical effects, low cost, and easy implementation, its limitations are also obvious, such as long time consumption, foreign body residue in needles and threads, and the quality of suturing is greatly affected by the proficiency of the operator. In order to make up for the shortcomings of manual suturing technology by clamping with forceps, researchers began to focus on the research and development of vascular anastomosis tools, aiming to improve the speed, quality and safety of vascular anastomosis.

[0003] Existing vascular anastomosis tools do not fully comply with the four principles of ideal vascular anastomosis, namely, avoiding stenosis of the anastomosis site, avoiding stenosis and unevenness of the vascular lumen, keeping the endothelium of the broken ends close together, and avoiding direct contact between the anastomosis material and the blood. In particular, small blood vessel suturing mostly uses the stretching suture method, or uses a guide tube to connect and anastomose the broken ends of small blood vessels and then sutures the two sides of the broken ends with sutures. However, the broken ends of small blood vessels that are connected and anastomosed by the guide tube are easy to detach during surgery, or the broken ends of small blood vessels are directly nailed together using a parallel nail-like structure. After these methods are used, the vascular wall is prone to anastomosis overlap, causing the vascular lumen to narrow after healing. Once the vascular wall fails to anastomose well, it is easy to suture dislocation and vascular distortion. Moreover, the vascular wall at the sutured position is still in a rigid state even after healing, which is not conducive to the normal flow of blood.

[0004] Therefore, it is necessary to propose a vascular anastomosis device that can fold the blood vessel ends outward and fix them and connect the inner walls of the ends to avoid overlapping of the blood vessels and reduction of the vascular cavity space, thereby reducing the trauma of the ends to the blood vessel walls. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a vascular anastomosis device, which drives the outer eversion piece to move and evert the blood vessel wall outward by rotating the cross-threaded ring on the guide tube, and turns the outer eversion piece with an outer square and an inner circle toward the anastomotic head on the same side, thereby expanding the area of ​​the everted blood vessel wall and piercing the outer eversion piece into the blood vessel wall in a circular shape, and then locks the outer eversion pieces on both sides that are absorbable and degradable by the human body to anastomose the blood vessel ends, thereby reducing the distortion of the blood vessel wall caused by suturing, improving the efficiency of the vascular anastomosis operation, and reducing the occurrence of overlapping anastomosis of the blood vessel ends.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a vascular anastomosis device comprises a guide tube, an annular protrusion is fixedly connected to the outer periphery of the middle part of the guide tube, a cavity is opened inside the annular protrusion, a cross-threaded ring is slidably sleeved in the center of the cavity, the inner wall of the cross-threaded ring is provided with cross threads, both ends of the guide tube are connected with anastomosis heads, and the outer walls of the guide tube and the anastomosis head are covered with a plurality of fish scale spines.

[0007] The principle of the basic scheme is: the drainage tube is the main part of the whole device, and its two ends are connected to the anastomotic head to form a through channel. The annular protrusion is fixedly connected to the middle periphery of the drainage tube, providing a stable support and sliding track for the cross-threaded ring. The fish scale spines are laid on the outer wall of the drainage tube and the anastomotic head, which increases the friction between the device and the blood vessel wall, helping to maintain the stability of the device during the operation.

[0008] The beneficial effects of the basic plan are: 1. Compared with the traditional manual anastomosis method, the use of a vascular stapler for surgery can significantly reduce the time required for anastomosis of a single blood vessel, thereby improving the overall surgical efficiency. During the vascular anastomosis operation, a guide tube can be used to connect the broken ends of small blood vessels to avoid tissue ischemia. After the vascular anastomosis, the guide tube can be removed to reduce the impact on the healing of the small blood vessel wall.

[0009] 2. The fish scale spines on the outer wall of the guide tube and the anastomosis head greatly increase the grip on the inner wall of the small blood vessels. Together with the squeezing force formed by the annular protrusions to open the ends of the small blood vessels, the ends of the small blood vessels that are being anastomosed can be prevented from falling off the guide tube, affecting subsequent blood delivery and the anastomosis of the ends of the small blood vessels.

[0010] Furthermore, a two-way pushing component is provided in the cavity, and a plurality of circumferentially arranged pushing through holes are symmetrically opened on the outer circumference of the guide tube, and the pushing through holes are connected to the outside and the cavity. The two-way pushing component includes radially symmetrical threaded half rings located inside the cavity, and the threads on the threaded half rings are opposite and cooperate with the cross threads on the inner wall of the cross thread ring. The outer wall of the cross thread ring is fixedly connected with a plurality of axial operating teeth along its circumference, and the threaded half rings on both sides slide with each other, and the end of the threaded half ring close to the corresponding anastomotic head is fixedly connected with a pushing ring, and the movement trajectory of the pushing ring coincides with the external flip part.

[0011] The beneficial effects of the basic scheme are as follows: 1. The threaded half ring design in the bidirectional pushing assembly realizes the efficient conversion of the rotational motion of the cross-threaded ring into linear motion through its threaded cooperation with the cross-threaded ring. This design ensures that the eversion piece can move along a precise trajectory, thereby evenly everting the vascular wall. Due to the radial symmetry of the threaded half ring and the opposite design of the thread, the eversion pieces on both sides can be pushed simultaneously and evenly, ensuring the flatness and consistency of the eversion of the vascular wall.

[0012] 2. The design of sliding fit between the threaded half rings not only ensures that they can move smoothly, but also enhances the structural stability and durability of the entire two-way push assembly. This design allows the assembly to maintain its function and integrity when used for a long time or under great pressure, thereby extending the service life of the vascular anastomosis device.

[0013] 3. The design of the push ring makes its movement trajectory coincide with the external eversion part, which ensures that the external eversion part can be accurately pushed to the predetermined position. At the same time, due to the fixed connection between the push ring and the threaded half ring, the movement of the external eversion part is more stable and smooth, reducing the risk of vascular wall damage caused by unstable movement.

[0014] Furthermore, a plurality of push grooves corresponding to the push through holes are opened on the outer periphery of the guide tube, and an outward-turned piece is provided in each of the push through holes. The outward-turned piece passes through the push through holes and is located on the push trajectory of the corresponding push ring. The outward-turned piece includes a plurality of outward-turned hooks arranged circumferentially, and the length of the hook handle of the outward-turned hook is greater than the length of the hook tip. The outer sides of the outward-turned hooks are square and slideably cooperate with the corresponding push through holes respectively, the outer sides of the hook handles of the outward-turned hooks slideably cooperate with the corresponding push grooves, the inner sides of the outward-turned hooks are arc-shaped, and elastic arc pieces are fixedly connected between the outward-turned hooks on the same side.

[0015] The beneficial effects of the basic scheme are as follows: 1. The design of the eversion piece combines an elastic arc piece and a plurality of eversion hooks arranged circumferentially. The length of the hook handle of the eversion hook is greater than the hook tip, ensuring that the eversion hook can effectively fit the push groove and evert the blood vessel wall when pushed. At the same time, the square design of the outer side of the eversion hook and the sliding cooperation of the push through hole, as well as the sliding cooperation of the outer side of the hook handle and the push groove, provide a stable motion trajectory, so that the eversion piece can move along a precise path, achieving high efficiency and precision in everting the blood vessel wall.

[0016] 2. The setting of the elastic arc not only increases the flexibility and eversion function of the eversion part, but also enhances the stability during eversion. It allows the eversion hook to bend moderately when subjected to external force, thereby better adapting to the shape and thickness of the blood vessel wall and ensuring the uniformity and consistency of eversion. This design reduces the risk of blood vessel wall damage caused by uneven eversion.

[0017] 3. The design of the hook tip is relatively blunt, and because the hook handle is longer than the hook tip, the hook can produce less pressure and friction when pushing the blood vessel wall, thereby reducing damage to the blood vessel wall. In addition, the arc-shaped design on the inside of the hook can better fit the shape of the blood vessel wall, further reducing the risk of injury.

[0018] Furthermore, both sides of the hook tip of the everted hook on one side of the guide tube are fixedly connected with a plurality of spine convex teeth in the opposite direction of the hook tip, and both sides of the hook tip of the everted hook on the other side are fixedly connected with spine grooves that can engage with the spine convex teeth for engaging and locking the blood vessel walls on both sides.

[0019] The beneficial effects of the basic scheme are: 1. An innovative vascular wall anastomosis locking mechanism is achieved through the convex teeth and concave grooves on both sides of the hook tip. When the two sides of the everted hooks are everted and contact or puncture the corresponding vascular wall, the convex teeth and concave grooves can engage with each other, thereby firmly locking the vascular walls on both sides to ensure the stability and durability of the anastomosis.

[0020] 2. The design of the convex teeth and concave grooves not only enhances the firmness of the anastomosis, but also improves the accuracy and uniformity of the anastomosis. Since the shape and distribution of the convex teeth and concave grooves are precisely calculated, they can ensure that the blood vessel walls on both sides can be accurately aligned during anastomosis, avoiding poor anastomosis caused by misalignment or overlap.

[0021] 3. The firm anastomotic locking mechanism reduces the risk of postoperative bleeding. The engagement of the spine convex teeth and the spine grooves can provide sufficient mechanical strength to resist the intravascular pressure, thereby preventing blood from leaking out of the anastomosis. In addition, since the anastomosis process is more precise and uniform, it also reduces the risk of other complications caused by poor anastomosis.

[0022] 4. The design of the convex teeth and concave grooves simplifies the surgical steps and improves the surgical efficiency. The doctor does not need to perform additional suturing or ligation operations, but only needs to turn the eversion hooks outward and make them mesh with each other to achieve anastomosis. This not only saves surgical time, but also reduces the difficulty and complexity of the operation.

[0023] 5. Since the anastomosis process is more precise and firm, the postoperative pain and discomfort caused by poor anastomosis are reduced. This helps promote the patient's postoperative recovery, reduces the recovery time and the possibility of vascular sclerosis.

[0024] Furthermore, the outer sides of the hook handles of the externally turned hooks corresponding to each other between the two externally turned parts are engraved with the same scales for identifying the relative positions of the externally turned hooks on both sides.

[0025] The beneficial effects of the basic scheme are: 1. By engraving the same scale on the outside of the corresponding everted hook handle, the doctor can accurately identify the relative position of the everted parts on both sides of the blood vessels. This design enables the doctor to accurately judge whether the everted parts on both sides are aligned when performing vascular anastomosis, thereby ensuring the accuracy and consistency of the anastomosis.

[0026] 2. The scale design not only improves the accuracy of surgical operations, but also enhances the repeatability of the surgery. The doctor can accurately adjust the position of the external eversion piece according to the marks on the scale, so that each operation can achieve a similar anastomosis effect. This helps to reduce uncertainty during the operation and improve the success rate of the operation.

[0027] 3. Because the scale design provides intuitive visual feedback, doctors can quickly determine the position of the eversion piece without additional measurement or marking steps. This simplifies the surgical steps, shortens the operation time, and reduces surgical risks.

[0028] Furthermore, mutually symmetrical clamping platforms are provided on the annular protrusions on both axial sides of the cross-threaded ring, and the clamping platforms are used to help the tweezers to clamp the guide tube steadily.

[0029] The beneficial effects of the basic scheme are: 1. By symmetrically opening the clamping platform on the annular protrusions on both sides of the cross-threaded ring, the doctor can easily use tweezers to clamp the drainage tube and temporarily install the drainage tube at the end of the blood vessel to stabilize the blood supply. This greatly improves the stability of the surgical operation and reduces the risk of surgery.

[0030] 2. Since the clamping platform is located on the annular protrusion of the cross-threaded ring and is designed to be relatively compact, it will not block the doctor's surgical field of view. This allows the doctor to clearly see the surgical area, accurately judge and operate, thereby improving the accuracy and safety of the operation.

[0031] 3. The design of the clamping platform reduces interference factors during surgery. The doctor can adjust the position of the guide tube conveniently and stably through the platform and focus on the surgical operation itself. This helps reduce tension and fatigue during surgery and improve the success rate of surgery.

[0032] Furthermore, the external eversion parts are all made of medical materials that are degradable by the human body, and the complete degradation period is greater than 14 days.

[0033] The benefits of the basic solution are: 1. The external eversion component is made of biodegradable medical materials, which can gradually degrade in the human body and eventually disappear completely, avoiding the rejection reaction, infection risk and other potential complications caused by long-term foreign body residue. This helps to improve the safety of the operation and the comfort of the patient.

[0034] 2. Due to the biodegradability of the material of the external eversion piece, it can gradually lose its supporting function during the tissue recovery process, allowing the tissue to fuse and repair naturally. This helps to reduce scar formation after surgery and promote the complete recovery of tissue structure and function.

[0035] 3. The use of biodegradable external eversion parts eliminates the need to worry about subsequent removal surgery, simplifies the surgical process, and reduces the number of surgeries and recovery time for patients. This not only reduces the physical burden on patients, but also reduces medical costs.

[0036] 4. The design of a complete degradation period of more than 14 days ensures that the eversion component can provide necessary support and guidance in the early stage after surgery, while not hindering the healing of the new blood vessel wall, thus avoiding the safety risks that may be caused by the long-term presence of foreign matter.

[0037] Furthermore, symmetrical fixing platforms are provided on both radial sides of the anastomotic head, and the fixing platforms are used to help the forceps clamp the blood vessel wall and the anastomotic head.

[0038] The beneficial effects of the basic solution are: 1. The design of the fixed platform enables the forceps to clamp the blood vessel wall and the anastomosis head more firmly, avoiding operational errors caused by sliding or shifting of the blood vessel wall during the operation. This improves the stability of the surgical operation and enables the doctor to perform the anastomosis operation more accurately.

[0039] 2. The design of the fixed platform simplifies the surgical steps. The doctor does not need to spend extra time and energy to stabilize the blood vessel wall and the anastomotic head, and can directly use forceps and fixed platforms for clamping and positioning. This helps to shorten the operation time and improve the efficiency of the operation.

[0040] Furthermore, the outer ends of the fish scale spines on both sides of the annular protrusion face toward the middle of the flow guide tube.

[0041] The beneficial effects of the basic scheme are: 1. The design of the outer end of the fish scale spine plate facing the middle of the guide tube enables the vascular anastomosis device to better fit the vascular wall during the operation. This design also enhances the fixation effect between the everted piece and the vascular wall, so that the everted piece can be locked more firmly after piercing the vascular wall, avoiding loosening or falling off of the anastomosis due to external force.

[0042] 2. The design of the fish scale spines allows the drainage tube to be tightly integrated with the inner wall of small blood vessels, reducing the exposure time of the surgical wound and the time of bleeding during the operation, thereby reducing the risk of postoperative infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is an axonometric view of the guide tube of the vascular anastomosis device in an embodiment of the present invention; Figure 2 An axonometric view of a vascular stapler according to an embodiment of the present invention; Figure 3 is a side cross-sectional view of a vascular stapler in an embodiment of the present invention; Figure 4 A top view of a vascular stapler according to an embodiment of the present invention; Figure 5 It is a schematic diagram of a vascular stapler everting a small blood vessel stump in an embodiment of the present invention; Figure 6 It is a schematic diagram of a vascular anastomosis device anastomosing and locking a small blood vessel end in an embodiment of the present invention.

[0044] The figure marks in the drawings of the specification include: 1. guide tube; 2. annular protrusion; 3. cross-threaded ring; 4. cavity; 5. threaded half ring; 6. fixed platform; 7. anastomosis head; 8. push groove; 9. push through hole; 10. clamping platform; 11. operating tooth; 12. push ring; 13. eversion hook; 14. elastic arc piece; 15. spinous convex tooth; 16. spinous groove; 17. scale; 18. tweezers; 19. small blood vessel end; 20. fish scale spine plate. DETAILED DESCRIPTION

[0045] The following is further described in detail through specific implementation methods: Example 1

[0046] Basically as attached Figure 1 , Figure 2 and Figure 3 As shown: A vascular anastomosis device includes a guide tube 1, an annular protrusion 2 is integrally formed on the outer periphery of the middle part of the guide tube 1, a cavity 4 is opened inside the annular protrusion 2, a cross-threaded ring 3 is slidably sleeved in the center of the cavity 4, the inner wall of the cross-threaded ring 3 is provided with cross threads, a bidirectional pushing assembly is installed in the cavity 4, a plurality of circumferentially arranged pushing through holes 9 are symmetrically opened on the outer periphery of the guide tube 1, the pushing through holes 9 are connected to the outside and the cavity 4, a plurality of pushing grooves 8 corresponding to the pushing through holes 9 are opened on the outer periphery of the guide tube 1, and external eversion parts are installed in the pushing through holes 9, the external eversion parts pass through the pushing through holes 9 and are located on the corresponding pushing tracks of the bidirectional pushing assembly, anastomosis heads 7 are connected at both ends of the guide tube 1, and a plurality of fish scale spines 20 are laid on the outer walls of the guide tube 1 and the anastomosis head 7. Symmetrical clamping platforms 10 are opened on the annular protrusions 2 on both axial sides of the cross-threaded ring 3, and the clamping platforms 10 are used to help Figure 5 The forceps 18 in the middle clamp the drainage tube 1. Symmetrical fixing platforms 6 are provided on both radial sides of the anastomotic head 7, and the fixing platforms 6 are used to help the forceps 18 clamp the blood vessel wall and the anastomotic head 7, and the outer ends of the fish scale spines 20 on both sides of the annular protrusion 2 are facing the middle of the drainage tube 1.

[0047] The specific implementation process is as follows: During the suturing of small blood vessels, since the broken ends of small blood vessels are in a ring-shaped structure, the use of suture thread for ring-shaped suturing may cause the broken ends of the blood vessels to be twisted, overlap and gaps in the anastomosis position of the broken ends of the blood vessels, etc., which in turn makes the blood vessel healing effect poor, the healed blood vessels twisted, and the overlapping healing of the blood vessel walls makes the inner diameter of the blood vessels narrow, affecting the blood delivery effect after healing.

[0048] like Figure 5As shown, when the doctor performs anastomosis of the small blood vessel stump 19, he first uses forceps 18 to stably clamp the clamping platform 10 on the annular protrusion 2, and partially sleeves the small blood vessel stump 19 from the anastomotic heads 7 on both sides, and tries to push it into the inside of the eversion piece. By removing the hemostatic forceps on the proximal part of the small blood vessel, the guide tube 1 temporarily achieves the effect of blood diversion of the small blood vessel stump 19. In order to obtain a better blood diversion effect and eversion effect, the fish scale spine plate 20 firmly grasps the guide tube 1 on the inner wall of the small blood vessel, thereby enhancing the safety of the vascular anastomosis operation and avoiding accidents.

[0049] After the small blood vessel end 19 is placed in the predetermined position, the doctor can use the forceps 18 to adjust the connection angle of the two ends to reduce the relative distortion of the blood vessel ends, and additionally use the forceps 18 to clamp the blood vessel wall on the anastomosis head 7 fixing platform 6. The forceps 18 firmly fix the blood vessel wall and the anastomosis head 7, and the fixing platform 6 can also play a role in positioning the clamping position of the forceps 18.

[0050] At this time, the small blood vessel stump 19 pushed to the middle of the drainage tube 1 has been stretched open by the outer wall of the annular protrusion 2, showing an eversion trend, which facilitates the subsequent eversion operation of the blood vessel wall.

[0051] Example 2

[0052] The difference from the above embodiment is that, as shown in the attached Figure 2 , Figure 3 and Figure 5 As shown: the bidirectional pushing assembly includes radially symmetrical threaded half rings 5 ​​located inside the cavity 4, the threads on the two threaded half rings 5 ​​are opposite and both cooperate with the cross threads on the inner wall of the cross thread ring 3, the outer side wall of the cross thread ring 3 is integrally formed with a plurality of axial operating teeth 11 along its circumference, the threaded half rings 5 ​​on both sides slide with each other, and a pushing ring 12 is welded on one end of the threaded half ring 5 close to the corresponding anastomotic head 7, and the movement trajectory of the pushing ring 12 coincides with the external flip part.

[0053] The specific implementation process is as follows: after clamping and fixing the anastomotic head 7 to the blood vessel wall, the doctor can use one tweezers 18 to clamp the clamping platform 10 on the annular protrusion 2, and another tweezers 18 to clamp the operating teeth 11 to rotate the cross-threaded ring 3. The cross threads on the inner wall of the cross-threaded ring 3 push the threaded half ring 5 that matches the internal threads to move axially toward the two ends of the guide tube 1. The axial sliding of the threaded half ring 5 in the cavity 4 pushes the push ring 12 to move axially, and finally reaches the top of the external eversion piece, and pushes the external eversion piece to turn the small blood vessel end 19 inside outward.

[0054] like Figure 5As shown, this process is achieved by axial sliding of the components, and the forceps 18 can stably clamp the anastomosis head 7 and the blood vessel wall, so that the small blood vessel end 19 can be stably and axially uniformly everted, ensuring the consistency of the eversion degree of the small blood vessel end 19, providing a uniform and complete eversion interface for subsequent end anastomosis.

[0055] Example 3

[0056] The difference from the above embodiment is that, as shown in the attached Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown: the eversion piece includes a plurality of eversion hooks 13 arranged in a circumferential direction, the length of the hook handle of the eversion hook 13 is greater than the length of the hook tip, the outer side of the eversion hook 13 is square and slides with the corresponding push through hole 9, the outer side of the hook handle of the eversion hook 13 slides with the corresponding push groove 8, the inner side of the eversion hook 13 is arc-shaped, and elastic arc pieces 14 are bonded between the eversion hooks 13 on the same side. The outer side of the hook handle of the corresponding eversion hook 13 is engraved with the same scale 17 for identifying the relative position of the eversion hooks 13 on both sides. The eversion pieces are made of medical materials that can be degraded by the human body, and the complete degradation period is greater than 14 days.

[0057] The hook tip of the outward-turned hook 13 on one side of the guide tube 1 is integrally formed with a plurality of convex teeth 15 in the opposite direction of the hook tip, and the hook tip of the outward-turned hook 13 on the other side is integrally formed with concave grooves 16 that can engage with the convex teeth 15 for engaging and locking the blood vessel walls on both sides.

[0058] The specific implementation process is as follows: When the doctor rotates the cross-threaded ring 3, the small blood vessel stump 19 opened by the annular protrusion 2 can be easily and evenly rolled outward because the inner side of the eversion piece is in an arc shape. When the push ring 12 reaches the push end, the doctor uses tweezers 18 to move the eversion hook 13 on the eversion piece at both ends of the drainage tube 1. Since the outer side of the eversion hook 13 is square and the elastic arc piece 14 has a certain elasticity, the eversion piece can be easily wrapped with the small blood vessel stump 19 to continue eversion. At this time, the hook handle of the eversion hook 13 holds the blood vessel wall on it and rolls it outward, and the hook tip faces the blood vessel wall after eversion and pierces the blood vessel wall until the eversion hook 13 is completely turned 180° and fixed on the blood vessel wall, and the small blood vessel stump 19 is everted and placed inside the hook arc of the eversion hook 13.

[0059] like Figure 6As shown, after the two ends of the blood vessel are everted and the small blood vessel stump 19 is punctured and fixed, the doctor uses hemostatic forceps to stop bleeding from the proximal part of the small blood vessel, and then releases the forceps 18 clamped on the fixed platform 6, and removes the blood vessel from the drainage tube 1. At this time, the two blood vessel stumps are fixed and propped up in a circle by the supporting effect of the everted parts, and the initial corresponding angles of the two blood vessel stumps on the drainage tube 1 are aligned according to the scale 17 on the outside of the hook handle of the everted hook 13. At this time, the hook handles of the everted hooks 13 of the two stumps are opposite, and the hook handles are staggered by one position, so that the everted parts on the two stumps are cross-locked, and the hook tips of the everted parts on the two stumps are also cross-locked, and the spine convex teeth 15 and spine grooves 16 on both sides of the hook tip are locked with each other. In this case, even if the hook tip fails to puncture the blood vessel wall, the blood vessel wall squeezed between the hook tips of the everted parts of the two stumps can be sealed, and the two blood vessel stumps are completely anastomosed together, and the parts that may originally overlap are everted to the periphery of the blood vessel stumps, thereby enhancing the healing effect and avoiding the sequelae of blood vessel overlap.

[0060] After the external eversion parts are anastomosed and closed, the doctor can use a knife to cut off the external eversion hook 13 hook handles left on the periphery of the stump together with the extra everted blood vessel stump, reduce the residual tissue of the wound, accelerate healing, and loosen the hemostatic clamp near the heart. After observing that there is no bleeding at the vascular anastomosis, the wound is sutured to complete the operation. Since the external eversion parts are made of medical materials that can be degraded by the human body, the external eversion parts remaining at the vascular anastomosis will be completely absorbed by the human tissue in 14 days, and there is no need to remove the stitches like in suture surgery, which reduces the steps of the operation and improves the anastomosis efficiency of the vascular stump.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0062] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A vascular anastomosis device, comprising a flow guide tube (1), characterized in that: An annular protrusion (2) is fixedly connected to the outer periphery of the middle part of the guide tube (1), a cavity (4) is formed inside the annular protrusion (2), a cross-threaded ring (3) is slidably sleeved in the center of the cavity (4), and the inner wall of the cross-threaded ring (3) is provided with cross-threads. Both ends of the guide tube (1) are connected to an anastomotic head (7), and the outer walls of the guide tube (1) and the anastomotic head (7) are both provided with a plurality of fish-scale spines (20).

2. The vascular anastomosis device according to claim 1, characterized in that: A bidirectional pushing assembly is provided in the cavity (4). The outer circumference of the guide tube (1) is symmetrically provided with a plurality of circumferentially arranged pushing through holes (9). The pushing through holes (9) are connected to the outside and the cavity (4). The bidirectional pushing assembly comprises radially symmetrical threaded half rings (5) located inside the cavity (4). The threads on the two threaded half rings (5) are opposite and both cooperate with the cross threads on the inner wall of the cross thread ring (3). The outer wall of the cross thread ring (3) is fixedly connected with a plurality of axial operating teeth (11) along its circumference. The threaded half rings (5) on both sides are slidably matched with each other. One end of the threaded half ring (5) close to the corresponding anastomotic head (7) is fixedly connected with a pushing ring (12).

3. The vascular anastomosis device according to claim 1, characterized in that: The guide tube (1) is provided with a plurality of push grooves (8) corresponding to the push through holes (9) on its outer circumference. The push through holes (9) are each provided with an outward-turned piece. The outward-turned piece passes through the push through holes (9) and is located on a push track of a corresponding push ring (12). The outward-turned piece comprises a plurality of outward-turned hooks (13) arranged in a circumferential direction. The length of the hook handle of the outward-turned hook (13) is greater than the length of the hook tip. The outer sides of the outward-turned hooks (13) are each square and slidably cooperate with the corresponding push through holes (9). The outer sides of the hook handles of the outward-turned hooks (13) are each slidably cooperate with the corresponding push grooves (8). The inner sides of the outward-turned hooks (13) are arc-shaped. The outward-turned hooks (13) on the same side are each fixedly connected with an elastic arc piece (14).

4. The vascular anastomosis device according to claim 3, characterized in that: A plurality of convex teeth (15) in opposite directions to the hook tip are fixedly connected on both sides of the hook tip of the everted hook (13) on one side of the guide tube (1), and a convex groove (16) capable of meshing with the convex teeth (15) is fixedly connected on both sides of the hook tip of the everted hook (13) on the other side, so as to mesh and lock the blood vessel walls on both sides.

5. The vascular anastomosis device according to claim 4, characterized in that: The outer sides of the hook handles of the mutually corresponding outward-turned hooks (13) between the two outward-turned parts are engraved with the same scale (17) for identifying the relative positions of the outward-turned hooks (13) on both sides.

6. The vascular anastomosis device according to claim 1, characterized in that: Mutually symmetrical clamping platforms (10) are provided on the annular protrusions (2) on both axial sides of the cross-threaded ring (3). The clamping platforms (10) are used to help the tweezers (18) to clamp the guide tube (1).

7. The vascular anastomosis device according to claim 3, characterized in that: The external eversion parts are all made of medical materials that are degradable by the human body, and the complete degradation period is greater than 14 days.

8. The vascular anastomosis device according to claim 1, characterized in that: Symmetrical fixing platforms (6) are provided on both radial sides of the anastomotic head (7), and the fixing platforms (6) are used to help the forceps (18) clamp the blood vessel wall and the anastomotic head (7).

9. The vascular anastomosis device according to claim 1, characterized in that: The outer ends of the fish scale spines (20) on both sides of the annular protrusion (2) face toward the middle of the flow guide tube (1).

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