A vascular anastomosis device

Abstract

The present invention discloses a vascular anastomosis device in the field of medical device technology, comprising a guide tube, an annular protrusion fixedly connected to the central outer periphery of the guide tube, a cavity defined within the annular protrusion, a cross-threaded ring slidably sleeved in the center of the cavity, the inner wall of the cross-threaded ring having cross-threads, an anastomosis head connected at both ends of the guide tube, and a plurality of fish-scale spines paved on the outer walls of both the guide tube and the anastomosis head. The present invention is novel and efficient, and securely connects the guide tube to the stump of a small blood vessel via the fish-scale spines, thereby providing a blood diversion function. By pushing and flipping the externally protruding member on the guide tube, the area of the externally protruding blood vessel wall is expanded, and the externally protruding member is annularly inserted into the blood vessel wall, locking and anastomosing the stump, thereby improving the efficiency of vascular anastomosis surgery and reducing the occurrence of overlapping anastomosis of blood vessel stumps.

Description

Technical Field

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

[0002] Vascular suturing technology has a long history. As early as 1902, Alexis Carrel proposed the technique of manual needle and thread suturing, for which he was awarded the 1912 Nobel Prize in Physiology or Medicine. While manual suturing offers advantages such as clinical effectiveness, affordability, and ease of implementation, it also has significant limitations, including time consumption, the presence of foreign matter in the needle and thread, and a significant impact on suture quality depending on the surgeon's proficiency. To address the shortcomings of manual suturing using forceps, researchers have begun to focus on the 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 anastomotic stoma, avoiding stenosis and unevenness of the vascular lumen, ensuring close contact between the endothelium of the broken ends, and avoiding direct contact between the anastomotic material and blood. In particular, small blood vessel suturing often uses stretching sutures, or uses a guide tube to connect the broken ends of the small blood vessels and then sews the two sides of the broken ends together with sutures. However, the small blood vessel ends that are connected by the guide tube are easily detached during surgery, or the small blood vessel ends are directly nailed together using a parallel nail-like structure. After these treatments, the blood vessel walls are prone to anastomosis overlap, resulting in a narrow blood vessel lumen after healing. If the blood vessel walls are not properly anastomosed, suture dislocation and blood vessel distortion are likely to occur. Moreover, the blood vessel walls at the sutured location remain in a rigid state even after healing, which is not conducive to normal blood flow.

[0004] Therefore, it is necessary to propose a vascular anastomosis device that can fold the broken ends of blood vessels outward and fix them and connect and anastomose the inner walls of the broken ends, so as to avoid overlapping of the blood vessels and reduction of the vascular cavity space, and reduce the residual trauma of the broken ends to the blood vessel wall. 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 flips the outer eversion piece with an outer square and 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 two sides of the eversion piece, which can be absorbed and degraded by the human body, to anastomose the blood vessel ends, thereby reducing the distortion of the blood vessel wall caused by suture, 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 includes 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, and an anastomosis head is connected to both ends of the guide tube, and the outer walls of the guide tube and the anastomosis head are covered with a plurality of fish scale spines.

[0007] The basic design works as follows: The drainage tube forms the main component of the device, connected at both ends to the anastomotic head, forming a continuous channel. An annular protrusion is fixed to the central periphery of the drainage tube, providing a stable support and sliding path for the cross-threaded rings. Fish-scale spines are laid on the outer walls of the drainage tube and anastomotic head, increasing friction between the device and the vessel wall and helping to maintain stability during surgery.

[0008] The beneficial effects of the basic plan are: 1. Using a vascular anastomosis device for surgery can significantly reduce the time required to anastomose a single blood vessel compared to traditional manual anastomosis methods, 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. Combined with the squeezing force formed by the annular protrusions to open the small blood vessel ends, this prevents the anastomosed small blood vessel ends from falling off the guide tube, affecting subsequent blood delivery and anastomosis of the small blood vessel ends.

[0010] Furthermore, a bidirectional pushing component is provided in the cavity, and a number 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 bidirectional 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 number of axial operating teeth along its circumference, and the threaded half rings on both sides slide with each other. The threaded half ring is fixedly connected to a pushing ring at one end close to the corresponding anastomotic head, and the movement trajectory of the pushing ring coincides with the outward-turning part.

[0011] The basic solution offers the following benefits: 1. The threaded half-ring design in the bidirectional push assembly, through its threaded engagement with the cross-threaded ring, efficiently converts the cross-threaded ring's rotational motion into linear motion. This design ensures that the eversion element follows a precise trajectory, resulting in uniform eversion of the vessel wall. The radial symmetry of the threaded half-ring and the opposing thread patterns allow the eversion elements on both sides to be pushed simultaneously and evenly, ensuring smooth and consistent eversion of the vessel wall.

[0012] 2. The sliding fit between the threaded halves not only ensures smooth movement but also enhances the structural stability and durability of the entire bidirectional push assembly. This design allows the assembly to maintain its functionality and integrity even under prolonged use or high pressure, thereby extending the life of the vascular anastomosis device.

[0013] 3. The push ring is designed so that its motion trajectory coincides with that of the external member, ensuring that the external member can be accurately pushed to the desired position. Furthermore, the fixed connection between the push ring and the threaded half ring makes the movement of the external member more stable and smooth, reducing the risk of vessel wall damage caused by unstable movement.

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

[0015] The basic solution offers the following benefits: 1. The design of the externalization element combines an elastic arc with several circumferentially arranged externalization hooks. The hook handles are longer than the hook tips, ensuring that when pushed, the hooks effectively engage the push grooves and externalize the vessel wall. Furthermore, the square design of the externalization hooks, the sliding fit between the push holes, and the sliding fit between the externalization hook handles and the push grooves, provide a stable motion trajectory, enabling the externalization element to move along a precise path, achieving efficient and accurate externalization of the vessel wall.

[0016] 2. The elastic arc not only increases the flexibility and eversion function of the eversion hook, but also enhances its stability during eversion. It allows the eversion hook to bend appropriately when subjected to external forces, thereby better adapting to the shape and thickness of the vessel wall and ensuring uniform and consistent eversion. This design reduces the risk of vessel wall damage caused by uneven eversion.

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

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

[0019] The basic solution offers the following benefits: 1. The protruding teeth and grooves on either side of the hook tip create an innovative anastomotic locking mechanism. When the hooks are everted and contact or puncture the corresponding vessel wall, the protruding teeth and grooves engage, firmly locking the vessel walls and ensuring a stable and durable anastomosis.

[0020] 2. The design of the protruding teeth and grooves not only enhances the firmness of the anastomosis, but also improves the accuracy and uniformity of the anastomosis. Because the shape and distribution of the protruding teeth and grooves are precisely calculated, they ensure that the two vessel walls are precisely aligned during anastomosis, avoiding poor anastomosis caused by misalignment or overlap.

[0021] 3. The secure anastomotic locking mechanism reduces the risk of postoperative bleeding. The meshing of the protruding spines and grooves provides sufficient mechanical strength to resist intravascular pressure, thereby preventing blood from leaking from the anastomotic opening. Furthermore, the more precise and uniform anastomosis process reduces the risk of complications caused by poor anastomosis.

[0022] 4. The design of the protruding teeth and grooves simplifies the surgical procedure and improves efficiency. The surgeon does not need to perform additional suturing or ligating procedures; simply turn the hooks inside out and engage them to achieve anastomosis. This not only saves surgical time but also reduces the difficulty and complexity of the procedure.

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

[0024] Furthermore, the outer sides of the hook handles of the corresponding outward-turning hooks between the two outward-turning parts are engraved with the same scale for identifying the relative positions of the outward-turning hooks on both sides.

[0025] The benefits of the basic solution are as follows: 1. By inscribing identical scales on the outside of the corresponding eversion hooks, doctors can precisely identify the relative positions of the eversion components on both sides of the vessel. This design allows doctors to accurately determine whether the eversion components are aligned during vascular anastomosis, thereby ensuring the accuracy and consistency of the anastomosis.

[0026] 2. The scale design not only improves surgical accuracy but also enhances surgical repeatability. The surgeon can precisely adjust the position of the external anastomosis component according to the markings on the scale, ensuring a similar anastomosis effect with each surgery. This helps reduce uncertainty during the surgery and improves the success rate of the surgery.

[0027] 3. Because the scale design provides intuitive visual feedback, doctors can quickly determine the position of the external eversion component 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 clamp the guide tube firmly.

[0029] The basic solution offers the following benefits: 1. By creating symmetrical clamping platforms on the annular protrusions on either side of the cross-threaded ring, the surgeon can easily use forceps to secure the catheter and temporarily install it in the stump of the blood vessel, stabilizing blood supply. This significantly improves surgical stability and reduces surgical risk.

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

[0031] 3. The clamping platform design reduces distractions during surgery. The surgeon can use the platform to easily and stably adjust the catheter's position and focus on the surgical procedure. This helps reduce tension and fatigue during surgery, improving the success rate.

[0032] Furthermore, the external parts are 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 as follows: 1. The external eversion component is made of biodegradable medical material that gradually degrades within the body and eventually disappears completely, avoiding the potential for rejection, infection, and other complications that may result from long-term foreign body retention. This helps improve surgical safety and patient comfort.

[0034] 2. Due to the biodegradability of the material of the external eversion component, it can gradually lose its support 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 components eliminates the need for 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 cycle of more than 14 days ensures that the external 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 benefits of the basic solution are as follows: 1. The fixed platform design enables the forceps to more firmly grip the vessel wall and the anastomotic head, avoiding surgical errors caused by vessel wall slippage or displacement. This improves surgical stability and enables surgeons to perform anastomosis more accurately.

[0039] 2. The fixed platform design simplifies surgical procedures. Surgeons no longer need to spend extra time and effort stabilizing the vessel wall and anastomotic tip; they can simply use forceps and the fixed platform for clamping and positioning. This helps shorten surgical time and improve surgical efficiency.

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

[0041] The beneficial effects of the basic solution are: 1. The design of the outer end of the fish scale spine facing the middle of the guide tube enables the vascular anastomosis device to better fit the blood vessel wall during surgery. This design also enhances the fixation effect between the external eversion piece and the blood vessel wall, allowing the external eversion piece to be locked more firmly after piercing the blood vessel 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 This is an axonometric view of the guide tube of the vascular anastomosis device according to an embodiment of the present invention;

[0044] Figure 2 An axonometric view of a vascular anastomosis device according to an embodiment of the present invention;

[0045] Figure 3 is a side sectional view of a vascular anastomosis device according to an embodiment of the present invention;

[0046] Figure 4 A top view of a vascular anastomosis device according to an embodiment of the present invention;

[0047] Figure 5 Schematic diagram of a vascular anastomosis device for everting a small blood vessel end in an embodiment of the present invention;

[0048] Figure 6 Schematic diagram of a vascular anastomosis device anastomosing and locking a small blood vessel end in an embodiment of the present invention.

[0049] 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. fixing platform; 7. anastomosis head; 8. pushing groove; 9. pushing through hole; 10. clamping platform; 11. operating tooth; 12. pushing ring; 13. outward hook; 14. elastic arc part; 15. spinous protrusion; 16. spinous groove; 17. scale; 18. tweezers; 19. small blood vessel end; 20. fish scale spine plate. DETAILED DESCRIPTION

[0050] The following is further described in detail through specific implementation methods:

[0051] Example 1

[0052] 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 a cross-thread, and a bidirectional pushing component is installed in the cavity 4. The outer periphery of the guide tube 1 is symmetrically provided with a plurality of circumferentially arranged pushing holes 9, and the pushing holes 9 are connected to the outside and the cavity 4. The outer periphery of the guide tube 1 is provided with a plurality of pushing grooves 8 corresponding to the pushing holes 9, and the pushing holes 9 are each provided with an external eversion member, and the external eversion member passes through the pushing holes 9 and is located on the corresponding pushing track of the bidirectional pushing component. The two ends of the guide tube 1 are connected with an anastomotic head 7, and the outer walls of the guide tube 1 and the anastomotic head 7 are paved with a plurality of fish scale spines 20. Mutually symmetrical clamping platforms 10 are provided 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 opened on both sides of the anastomotic head 7 in the radial direction. 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.

[0053] 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 circular suturing may cause the broken ends of the blood vessels to be twisted, and there may be overlaps and gaps in the anastomosis positions of the broken ends of the blood vessels, thereby resulting in poor blood vessel healing effect. The healed blood vessels are 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.

[0054] like Figure 5As shown, when performing an anastomosis of a small vessel stump 19, the surgeon first uses forceps 18 to firmly grasp the clamping platform 10 on the annular protrusion 2, partially encircles the small vessel stump 19 from both sides of the anastomotic head 7, and pushes it as far as possible into the interior of the external eversion member. By removing the hemostatic forceps proximal to the small vessel, the drainage tube 1 temporarily achieves blood diversion from the small vessel stump 19. To achieve better blood diversion and external eversion, the fish scale spines 20 firmly grasp the drainage tube 1 against the inner wall of the small vessel, enhancing the safety of the vascular anastomosis procedure and preventing accidents.

[0055] 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. At the same time, the fixing platform 6 can also play a role in positioning the clamping position of the forceps 18.

[0056] 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 and has a tendency to evert, which facilitates the subsequent eversion operation of the blood vessel wall.

[0057] Example 2

[0058] 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, and 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 to 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 outward-turning part.

[0059] The specific implementation process is as follows: after clamping and fixing the anastomosis 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 thread to move axially towards 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 outward.

[0060] like Figure 5As shown, this process is achieved by the 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 turned outward, ensuring the consistency of the degree of eversion of the small blood vessel end 19, and providing a uniform and complete eversion interface for subsequent end anastomosis.

[0061] Example 3

[0062] 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 external component comprises several circumferentially arranged external hooks 13. The hook handles of the external hooks 13 are longer than the hook tips. The outer sides of the external hooks 13 are square and slideably engage with the corresponding push holes 9. The outer sides of the hook handles of the external hooks 13 slideably engage with the corresponding push grooves 8. The inner sides of the external hooks 13 are arc-shaped. Elastic arc members 14 are bonded between the external hooks 13 on the same side. The outer sides of the hook handles of the corresponding external hooks 13 are engraved with the same scale 17 to identify the relative position of the external hooks 13 on both sides. The external components are made of biodegradable medical materials and have a complete degradation period of more than 14 days.

[0063] The hook tip of the outward-turned hook 13 on one side of the guide tube 1 is integrally formed with a plurality of ratchet 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 ratchet grooves 16 that can engage with the ratchet teeth 15 for engaging and locking the blood vessel walls on both sides.

[0064] The specific implementation process is as follows: When the doctor rotates the cross-threaded ring 3, the small blood vessel stump 19 held open by the annular protrusion 2 can be easily and evenly rolled outwards due to the arc-shaped inner side of the eversion member. When the pushing ring 12 reaches the pushing end point, the doctor uses tweezers 18 to move the eversion hook 13 on the eversion member at both ends of the drainage tube 1. Since the outer side of the eversion hook 13 is square and the elastic arc member 14 has a certain elasticity, the eversion member can be easily wrapped around the small blood vessel stump 19 and continue to evert. At this time, the hook handle of the eversion hook 13 holds the blood vessel wall above it and rolls it outwards, 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. The small blood vessel stump 19 is everted and placed inside the hook arc of the eversion hook 13.

[0065] 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, then releases the forceps 18 clamped on the fixing platform 6, and removes the blood vessel from the drainage tube 1. At this time, the two blood vessel stumps are fixed and supported in a circular shape by the support of the everted parts, and are aligned with the initial corresponding angles of the two blood vessel stumps on the drainage tube 1 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 to each other, 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 tips 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. The part that may have overlapped is everted to the periphery of the blood vessel stump, thereby enhancing the healing effect and avoiding the sequelae of blood vessel overlap.

[0066] After the external eversion components are anastomosed and closed, the doctor can use a knife to cut off the external eversion hooks 13 remaining on the periphery of the stump along with the excess everted blood vessel stump, reducing residual wound tissue and accelerating healing. The doctor then loosens the hemostatic clamp near the heart and, after observing that the vascular anastomosis is no longer bleeding, sutures the wound to complete the operation. Because the external eversion components are made of biodegradable medical materials, the external eversion components remaining at the vascular anastomosis will be completely absorbed by the human tissue within 14 days, eliminating the need for suture removal and other steps required in suturing surgery. This reduces the number of surgical steps and improves the efficiency of the vascular anastomosis.

[0067] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0068] The above is only an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the 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 variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection 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 portion 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 paved with a plurality of fish-scale spines (20); A bidirectional pushing assembly is provided in the cavity (4), and a plurality of circumferentially arranged pushing through holes (9) are symmetrically opened on the outer circumference of the guide tube (1), and the pushing through holes (9) are all connected to the outside and the cavity (4). The bidirectional pushing assembly includes radially symmetrical threaded half rings (5) located inside the cavity (4), and 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, and the threaded half rings (5) on both sides slide with each other, and the threaded half ring (5) is fixedly connected with a pushing ring (12) at one end close to the corresponding anastomotic head (7); The guide tube (1) is provided with a plurality of push grooves (8) corresponding to the push through holes (9) on its outer periphery. The push through holes (9) are each provided with an outward-turning member. The outward-turning member passes through the push through holes (9) and is located on the push track of the corresponding push ring (12). The outward-turning member includes a plurality of outward-turning hooks (13) arranged in a circumferential direction. The length of the hook handle of the outward-turning hook (13) is greater than the length of the hook tip. The outer sides of the outward-turning hooks (13) are all square and slide in conjunction with the corresponding push through holes (9). The outer sides of the hook handles of the outward-turning hooks (13) slide in conjunction with the corresponding push grooves (8). The inner sides of the outward-turning hooks (13) are arc-shaped. The outward-turning hooks (13) on the same side are all fixedly connected with elastic arc members (14). The annular protrusions (2) on both axial sides of the cross-threaded ring (3) are provided with mutually symmetrical clamping platforms (10), and the clamping platforms (10) are used to help the tweezers (18) to clamp the guide 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); The outer ends of the fish scale spine plates (20) on both sides of the annular protrusion (2) are both oriented toward the middle of the flow guide tube (1).

2. The vascular anastomosis device according to claim 1, 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 engaging with the convex teeth (15) is fixedly connected on both sides of the hook tip of the everted hook (13) on the other side, for engaging and locking the blood vessel walls on both sides.

3. The vascular anastomosis device according to claim 2, characterized in that: The outer sides of the hook handles of the mutually corresponding outward-turning hooks (13) between the two outward-turning parts are all engraved with the same scale (17) for identifying the relative positions of the outward-turning hooks (13) on both sides.

4. The vascular anastomosis device according to claim 1, characterized in that: The external parts are made of biodegradable medical materials, and the complete degradation period is more than 14 days.

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