Vascular anastomosis device

Abstract

The vascular anastomosis device comprises a first supporting piece and a connecting piece, the first supporting piece is provided with a first opening penetrating through the inner wall and the outer wall of the first supporting piece, the first opening is used for being opposite to a first orificium fistulae on a first blood vessel, and the connecting piece comprises a pipe part and a first clamping part connected to one end of the pipe part; the connecting piece is provided with a blood flow channel penetrating through the tube part and the first clamping part in the axial direction of the tube part, the tube part penetrates through the first opening, and the first clamping part is arranged on the inner wall side of the first supporting piece and matched with the inner wall of the first supporting piece to be used for clamping the blood vessel wall around the first fistula opening in the first blood vessel in a sealed mode. According to the vascular anastomosis device, the operation time is saved, the operation efficiency is improved, and meanwhile the operation safety and the postoperative recovery effect are improved.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a vascular anastomosis device. Background Art

[0002] Hemodialysis is one of the main renal replacement therapies for patients with renal failure. Establishing an effective vascular access is a prerequisite for the smooth progress of hemodialysis. Clinically, an autogenous arteriovenous fistula (AVF) or a vascular graft arteriovenous fistula (AVG) is usually used to provide the blood access required for dialysis for hemodialysis patients.

[0003] During AVF surgery, it is usually necessary for a doctor to anastomose an artery and a vein, and perform manual suturing at the anastomosis to form a blood flow path. However, manual suturing requires high skills from the doctor, and the suturing effects of different doctors vary. Doctors who are proficient in the microsized vascular suturing technique require at least 3 to 5 years of practical training and experience accumulation. Even for doctors with very rich experience, there is still a possibility of suturing mistakes. Mistakes caused by these human factors may directly lead to complications such as vascular injury and infection, and directly affect the long-term patency rate of the blood vessels. In addition, manual suturing takes a long time, prolongs the operation time, increases the risk of patient infection, and also greatly consumes the doctor's time and energy. At the same time, due to reasons such as the stimulation of the suture needle during manual suturing, it is inevitable to cause intimal injury to the blood vessels, and there may be intraoperative vascular spasm, and even the formation of thrombus in the blood vessels. Summary of the Invention

[0004] Based on this, it is necessary to provide a vascular anastomosis device for the problem of how to more conveniently and safely form a blood flow path.

[0005] This application provides a vascular anastomosis device, including:

[0006] A first support member, the first support member is provided with a first opening penetrating through its inner and outer walls, and the first opening is used to be opposite to the position of a first fistula opening on a first blood vessel; and,

[0007] A connecting member, the connecting member includes a tube portion and a first engaging portion connected to one end of the tube portion. The connecting member is provided with a blood flow channel penetrating through the tube portion and the first engaging portion along the axial direction of the tube portion. The tube portion passes through the first opening, and the first engaging portion is arranged on the inner wall side of the first support member. The first engaging portion cooperates with the inner wall of the first support member to hermetically clamp the blood vessel wall around the first fistula opening on the first blood vessel.

[0008] The technical solution is further described below:

[0009] In one embodiment, the inner wall of the first support member is provided with a receiving groove, the receiving groove is communicated with the first opening, and the first engaging portion is disposed in the receiving groove and matched with the groove wall of the receiving groove.

[0010] In one of the embodiments, one of the groove wall of the accommodating groove and the first engaging portion is provided with a locking protrusion, and the other is provided with a locking groove matched with the locking protrusion, and the locking protrusion is engaged with the locking groove.

[0011] In one embodiment, the first support member is a first sleeve, and an inlet is formed on a side of the first support member away from the first opening. The inlet passes through both ends of the first support member in the axial direction of the first support member and is connected to the inner cavity of the first support member.

[0012] In one embodiment, in a plane perpendicular to the axis of the first support member, the edge of the inlet is in a serrated or wavy structure; or, in a plane parallel to the axis of the first support member, the edge of the inlet is in a serrated or wavy structure.

[0013] In one embodiment, the first support member is provided with a avoidance opening, the avoidance opening is communicated with the inlet, and the position of the avoidance opening and the position of the first opening are arranged correspondingly in the circumferential direction of the first support member.

[0014] In one embodiment, the inner wall of the tube and the first engaging portion are both provided with a biocompatible protective layer; and / or,

[0015] The outer wall of the first support member and the outer wall of the tube portion are both covered with a biocompatible protective cover.

[0016] In one embodiment, the angle between the central axis of the tube portion and the central axis of the first blood vessel is in the range of 40° to 60°.

[0017] In one embodiment, the vascular anastomosis device also includes a snap-fitting member, which is nested with the other end of the tube portion, and the snap-fitting member is provided with a through hole connected to the blood flow channel, and the snap-fitting member cooperates with the tube portion to seal and clamp the vascular wall of the second blood vessel end.

[0018] In one of the embodiments, one of the buckle and the tube portion is provided with a boss, and the other is provided with a groove matched with the boss, and the boss is arranged in the groove.

[0019] In one embodiment, the vascular anastomosis device also includes a second support member, the second support member is provided with a second opening penetrating through its inner and outer walls, the second opening is used to be opposite to the second fistula opening on the second blood vessel, the connecting member also includes a second clamping portion connected to the end of the tube portion away from the first clamping portion, the tube portion is also passed through the second opening, the second clamping portion is arranged on the inner wall side of the second support member, the second clamping portion cooperates with the inner wall of the second support member to seal and clamp the vascular wall around the second fistula opening on the second blood vessel.

[0020] In the above-mentioned vascular anastomosis device, by arranging the first support member on the first blood vessel, and making the first opening position of the first support member correspond to the first fistula position on the first blood vessel, and at the same time placing the first clamping portion of the connecting member in the first blood vessel through the first fistula, and then matching the first clamping portion with the inner wall of the first support member, the first clamping portion and the inner wall of the first support member can respectively clamp the blood vessel wall around the first fistula on the first blood vessel from the inner and outer sides of the first blood vessel, so as to seal the edge of the first fistula and connect the blood flow channel of the connecting member with the first fistula, and then by connecting the other end of the connecting member to the second blood vessel, a blood flow channel connecting the first blood vessel and the second blood vessel can be established. Compared with the traditional solution that requires suturing the first blood vessel and the second blood vessel, the vascular anastomosis device of the present application does not require suturing the first blood vessel and the second blood vessel, and the operation is simpler, which reduces the doctor's operating experience requirements, greatly saves operation time, and improves operation efficiency. At the same time, it reduces the probability of vascular endothelial damage, intraoperative vascular spasm and intravascular thrombosis caused by suturing operation, and improves surgical safety and postoperative recovery effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0024] Figure 1 It is a schematic diagram of the cooperation between a vascular anastomosis device according to an embodiment and a first blood vessel and a second blood vessel.

[0025] Figure 2 is Figure 1 a cross-sectional view of the vascular anastomosis device shown in

[0026] Figure 3 a schematic structural view of the vascular anastomosis device of an embodiment.

[0027] Figure 4 is Figure 3 a cross-sectional view of the vascular anastomosis device shown in

[0028] Figure 5 a schematic structural view of the first support member of an embodiment.

[0029] Figure 6 is Figure 5 a cross-sectional view of the first support member shown in

[0030] Figure 7 a schematic structural view of the connecting member of an embodiment.

[0031] Figure 8 is Figure 7 a cross-sectional view of the connecting member shown in

[0032] Figure 9 a left view of the first support member of an embodiment.

[0033] Figure 10 a schematic structural view of the first support member of another embodiment.

[0034] Figure 11 a left view of the first support member of still another embodiment.

[0035] Figure 12 a schematic structural view of the buckle member of an embodiment.

[0036] Figure 13 a schematic structural view of the lining rod penetrating into the second blood vessel of an embodiment.

[0037] Figure 14 a connection diagram of the buckle member and the second blood vessel of an embodiment.

[0038] Figure 15 a schematic structural view of the vascular anastomosis device of another embodiment.

[0039] Figure 16 a schematic structural view of the vascular anastomosis device of still another embodiment.

[0040] Explanation of reference numerals:

[0041] 10. First support member; 11. First opening; 12. Receiving groove; 121. Card slot; 13. Entrance; 131. Serrated structure; 14. Avoidance opening; 20. Connecting member; 21. Pipe portion; 22. First engaging portion; 221. Card convex; 23. Blood flow channel; 231. Groove; 30. Buckling member; 31. Through hole; 32. Boss; 40. Second support member; (50, 50a, 50b). First blood vessel; 51. First fistula opening; (60, 60a, 60b). Second blood vessel; 70. Lining rod. Detailed implementation manners

[0042] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0043] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application.

[0044] In addition, if these terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0045] In this application, unless otherwise clearly specified or limited, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In this application, unless otherwise clearly specified or limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0047] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation manner.

[0048] See Figures 1 to 4 , in some application scenarios, the vascular anastomosis device provided in this application can be used to achieve the communication between the side part of the first blood vessel 50 and the end part of the second blood vessel 60. Wherein the first blood vessel 50 can be an artery or a vein, a first fistula 51 is opened on the side part of the first blood vessel 50, the second blood vessel 60 can be a section of blood vessel intercepted from an artery or a vein, one end of the second blood vessel 60 is connected to the first blood vessel 50 through the first fistula 51, and the other end is ligated. The specific structure of the vascular anastomosis device will be described below in combination with this application scenario.

[0049] See Figure 1 and Figure 2, the anastomosis device of an embodiment includes a first support member 10 and a connecting member 20. The first support member 10 has two side walls disposed opposite to each other. For the convenience of understanding and description, in the use state, the side wall facing the first blood vessel 50 is defined as the inner wall of the first support member 10, and the side wall facing away from the first blood vessel 50 is defined as the outer wall of the first support member 10.

[0050] Specifically, in one embodiment, the first support member 10 is a tubular structure, and the first support member 10 is provided with a first opening 11 penetrating through its inner and outer walls. The first support member 10 is used to sleeved on the first blood vessel 50 to support the first blood vessel 50, and the first opening 11 corresponds to the position of the first fistula 51. The connecting member 20 includes a tube portion 21 and a first engaging portion 22 connected to one end of the tube portion 21. The connecting member 20 is provided with a blood flow channel 23 penetrating through the tube portion 21 and the first engaging portion 22 along the axial direction of the tube portion 21. One end of the tube portion 21 connected with the first engaging portion 22 is inserted into the first opening 11, and the other end of the tube portion 21 is used to communicate with the end of the second blood vessel 60. The first engaging portion 22 is disposed on the inner wall side of the first support member 10. During clinical use, the first engaging portion 22 can be placed into the first blood vessel 50 through the first fistula 51. Further, the first engaging portion 22 cooperates with the inner wall of the first support member 10 so that the first engaging portion 22 and the inner wall of the first support member 10 jointly form a first clamping portion. Specifically, the first clamping portion is used to seal and clamp the blood vessel wall around the first fistula 51 on the first blood vessel 50, that is, the first engaging portion 22 and the inner wall of the first support member 10 respectively closely fit the blood vessel wall around the first fistula 51 from the inside and outside of the first blood vessel 50 to seal the edge of the first fistula 51.

[0051] In some other embodiments, the first support member 10 can also be a sheet-like structure, and the first support member 10 has two surfaces disposed opposite to each other. Among them, the inner wall of the first support member 10 is the surface facing the first blood vessel 50 among the two surfaces in the use state, and the outer wall of the first support member 10 is the side wall facing away from the first blood vessel 50 among the two surfaces in the use state. It can be understood that for the other components in the blood vessel anastomosis device except the first support member 10 and the cooperation mode between the blood vessel anastomosis device and the blood vessel, reference can be specifically made to the foregoing embodiments, which will not be elaborated herein.

[0052] In the above vascular anastomosis device, by sleeving the first support member 10 on the first blood vessel 50 and making the position of the first opening 11 of the first support member 10 correspond to the position of the first fistula opening 51 on the first blood vessel 50, and at the same time placing the first engaging portion 22 of the connecting member 20 into the first blood vessel 50 through the first fistula opening 51, so that the first engaging portion 22 cooperates with the inner wall of the first support member 10, the first engaging portion 22 and the inner wall of the first support member 10 can respectively seal and clamp the blood vessel wall along the edge of the first fistula opening 51 of the first blood vessel 50 from the inside and outside of the first blood vessel 50, so as to seal the edge of the first fistula opening 51 and make the blood flow channel 23 of the connecting member 20 communicate with the first fistula opening 51. Then, by connecting the other end of the connecting member 20 to the second blood vessel 60, a blood flow path connecting the first blood vessel 50 and the second blood vessel 60 can be established. Compared with the traditional scheme that requires suturing the first blood vessel 50 and the second blood vessel 60, the vascular anastomosis device of the present application does not need to suture the first blood vessel 50 and the second blood vessel 60, the operation is simpler, the requirement for doctors' operation experience is reduced, the operation time is greatly saved, the operation efficiency is improved, and at the same time, the probability of intimal injury of blood vessels, intraoperative vasospasm and thrombosis formation in blood vessels caused by suture operation is reduced, and the operation safety and postoperative recovery effect are improved.

[0053] See Figures 4 to 6 , in an embodiment. The inner wall of the first support member 10 is provided with a receiving groove 12. Specifically, the receiving groove 12 is arranged corresponding to the position of the first fistula opening 51 and communicates with the first opening 11. The first engaging portion 22 is arranged in the receiving groove 12, and the first engaging portion 22 cooperates with the groove wall of the receiving groove 12. By arranging the first engaging portion 22 in the receiving groove 12, the first engaging portion 22 is prevented from protruding from the inner wall of the first support member 10, thereby reducing the risk of thrombosis formation in the first blood vessel 50 at the position of the first engaging portion 22, and also avoiding reducing the inner diameter of the first support member 10 and ensuring smooth blood flow in the first blood vessel 50. In some implementation manners, the first engaging portion 22 is a circular arc thin sheet structure, and the curvature of the side surface of the first engaging portion 22 close to the tube portion 21 is consistent with the curvature of the groove wall of the receiving groove 12, so as to ensure that the first engaging portion 22 can be closely attached to the groove wall of the receiving groove 12 and improve the sealing effect.

[0054] Further, see Figure 6 and Figure 7, one of the groove wall of the receiving groove 12 and the first engaging portion 22 is provided with a locking protrusion 221, and the other is provided with a locking groove 121 adapted to the locking protrusion 211, that is, the shape and size of the locking groove 121 are adapted to the shape and size of the locking protrusion 221 one by one, and further, the locking protrusion 221 is engaged with the locking groove 121. For example, in this embodiment, the two sides of the first engaging portion 22 are provided with a locking protrusion 221, and the groove walls on the opposite sides of the receiving groove 12 are correspondingly provided with the locking grooves 121, and the locking protrusions 221 are inserted into the locking grooves 121 one by one, thereby improving the locking stability of the first engaging portion 22 and the groove wall of the receiving groove 12, and further improving the clamping stability of the first blood vessel 50. It is understandable that in other embodiments, the clamping protrusion 221 can also be arranged on the groove wall of the receiving groove 12, and correspondingly, the clamping groove 121 is provided on the first engaging portion 22, so that by inserting the clamping protrusion 221 into the clamping groove 121, the clamping stability between the first engaging portion 22 and the groove wall of the receiving groove 12 can also be improved. In some embodiments, the clamping protrusion 221 is a circular protrusion convexly arranged on the surface of the first engaging portion 22, and correspondingly, the clamping groove 121 is a circular groove, so that the clamping protrusion 221 is conveniently inserted into the clamping groove 121.

[0055] See also Figure 5 Optionally, in one embodiment, the first support member 10 is a first sleeve, that is, the first support member 10 is a tubular structure and has an inner cavity. The first support member 10 is provided with an inlet 13 on the side away from the first opening 11. The inlet 13 passes through both ends of the first support member 10 in the axial direction of the first support member 10 and is connected to the inner cavity of the first support member 10. The inlet 13 can allow the first blood vessel 50 to be placed in the inner cavity of the first support member 10, so that the first support member 10 can be sleeved on the first blood vessel 50 without cutting off the first blood vessel 50. In some embodiments, see Figure 9 , the center angle a corresponding to the entrance 13 is less than 180°, wherein the center angle a corresponding to the entrance 13 refers to the center angle corresponding to the missing arc segment between the two opposite side walls of the entrance 13 in the outer circle of the projection of the first support member 10 along the axial direction. In this way, it is ensured that the first support member 10 can better support the vascular tissue of the first blood vessel 50 near the first fistula 51, and at the same time, the risk of the first blood vessel 50 detaching from the first support member 10 at the entrance 13 can be reduced. For example, the center angle a corresponding to the entrance 13 can be 40°, 50° or 60°.

[0056] See also Figure 10 It should be noted that, in another embodiment, the central angle a corresponding to the entrance 13 may also be greater than or equal to 180°, that is, the first support member 10 is a sheet-like structure. In this way, it is more convenient to set the first support member 10 on the first blood vessel 50. At this time, the first clamping portion 22 is clamped with the inner wall of the first support member 10 to fix the first support member 10 on the first blood vessel 50.

[0057] See Figure 11 , optionally, in one embodiment, the first support member 10 is formed with a serrated structure 131 or a wavy structure at the edge of the inlet 13. Specifically, as Figure 11 shown, in a plane perpendicular to the axis of the first support member 10, the edge of the inlet 13 has a serrated structure 131 or a wavy structure. Alternatively, in other embodiments, in a plane parallel to the axis of the first support member 10, the edge of the inlet 13 has a serrated structure 131 or a wavy structure. The serrated structure 131 or the wavy structure can make the edge of the inlet 13 form an uneven structure, thereby increasing the frictional force between the edge of the inlet 13 and the first blood vessel 50, and further reducing the risk of the first blood vessel 50 detaching from the first support member 10 at the inlet 13.

[0058] Continue to refer to Figure 5 , optionally, in one embodiment, the first support member 10 is further provided with an avoidance opening 14. The avoidance opening 14 is communicated with the inlet 13, and the position of the avoidance opening 14 is correspondingly arranged with the position of the first opening 11 in the circumferential direction of the first support member 10. In some of these embodiments, the first support member 10 is provided with an avoidance opening 14 on each side of the inlet 13. The two avoidance openings 14 are arranged opposite to each other and are both communicated with the inlet 13. The position of the avoidance opening 14 is correspondingly arranged with the position of the first opening 11 in the circumferential direction of the first support member 10. By providing the avoidance opening 14 communicated with the inlet 13 on the first support member 10 and making the position of the avoidance opening 14 correspond to the position of the first opening 11 in the circumferential direction, when the connecting member 20 is inserted into the first opening 11 from the inlet 13, the avoidance opening 14 can avoid the connecting member 20 and prevent the connecting member 20 from interfering with the two side edges of the inlet 13. While ensuring that the connecting member 20 can pass through the inlet 13 smoothly and be inserted into the first opening 11, the overall enlargement of the inlet 13 is avoided.

[0059] Optionally, in one embodiment, both the first support member 10 and the connecting member 20 are made of polymer materials, such as PC (Polycarbonate), ABS (Acrylonitrile Butadiene Styrene plastic), PP (polypropylene), PE (polyethylene), PTFE (Polytetrafluoroethylene), etc. Compared with metal materials, polymer materials have lower costs and are more convenient to process.

[0060] Optionally, in one embodiment, a biocompatible protective layer is provided on the inner wall of the tube portion 21 and the first engaging portion 22. In some embodiments, the biocompatible protective layer can be a polyurethane film. By providing a biocompatible protective layer on the inner wall of the tube portion 21 and the first engaging portion 22, direct contact between the inner wall of the tube portion 21 and the first engaging portion 22 and blood can be avoided, thereby reducing thrombus formation.

[0061] Optionally, in one embodiment, a biocompatible protective sleeve is coated on the outer wall of the first support member 10 and the outer wall of the tube portion 21. In some embodiments, the biocompatible protective sleeve can be made of silicone or polyester. By means of the biocompatible protective sleeve, direct contact between the outer wall of the first support member 10 and the outer wall of the tube portion 21 and subcutaneous tissue is avoided, which can improve the biocompatibility of the vascular anastomosis device, reduce the occurrence of rejection, and at the same time, by contacting the subcutaneous tissue with the biocompatible protective sleeve, good anti-displacement performance can be provided for the vascular anastomosis device, reducing the displacement and misalignment of the vascular anastomosis device.

[0062] See Figure 3 , optionally, in one embodiment, the included angle range between the central axis of the tube portion 21 and the central axis of the first blood vessel 50 is 40° to 60°. In some embodiments, the included angle between the central axis of the tube portion 21 and the central axis of the first blood vessel 50 is 40°, 50° or 60°. In this way, it better meets the hemodynamic requirements, enables the blood flow in the first blood vessel 50 to enter the second blood vessel 60 more smoothly, reduces the occurrence of blood turbulence between the first blood vessel 50 and the second blood vessel 60, and further optimizes the long-term stenosis problem of the inner cavity of the blood flow passage.

[0063] See Figure 2 and Figure 4 , in one embodiment, the vascular anastomosis device further includes a buckle member 30. The buckle member 30 is nested and fitted with the end of the tube portion 21 away from the first engaging portion 22. The buckle member 30 is provided with a through hole 31 communicating with the blood flow channel 23. The buckle member 30 and the tube portion 21 cooperate to jointly form a second clamping portion, and the second clamping portion is used to hermetically clamp the blood vessel wall at the end of the second blood vessel 60. Specifically, see Figure 12 and Figure 14 , in some embodiments, the buckle member 30 is embedded in the tube portion 221, and a second clamping portion is formed between the buckle member 30 and the inner wall of the tube portion 21. When connecting the second blood vessel 60, first pass the end of the second blood vessel 60 through the through hole 31 of the buckle member 30, and then turn the end of the second blood vessel 60 outward and sleeved on the outer surface of the buckle member 30. See Figure 13, for ease of operation, a lining rod 70 can be first inserted into the end of the second blood vessel 60, and then the buckle member 30 is sleeved on the end of the second blood vessel 60 along the lining rod 70. After fixing the positions of the second blood vessel 60 and the buckle member 30, the port of the second blood vessel 60 is turned outwards to the outer surface of the buckle member 30, and then the lining rod 70 is withdrawn to complete the effective connection between the buckle member 30 and the end of the second blood vessel 60. Refer to Figure 2 , finally, the buckle member 30 is inserted into the tube portion 21, so that the buckle member 30 and the inner wall of the tube portion 21 jointly clamp and fix the end of the blood vessel, and the blood flow channel 23 of the second blood vessel 60 is communicated with the connecting member 20, so as to realize the establishment of a blood flow path connecting the first blood vessel 50 and the second blood vessel 60 without suturing.

[0064] It should be noted that in some other embodiments, the buckle member 30 can also be sleeved outside the tube portion 21, and a second clamping portion is formed between the buckle member 30 and the outer wall of the tube portion 21. Specifically, when connecting the second blood vessel 60, the end of the second blood vessel 60 is first passed through the through hole 31 of the buckle member 30, then the end of the second blood vessel 60 is sleeved on the tube portion 21, and then the buckle member 30 is sleeved on the tube portion 21, so that the buckle member 30 and the outer wall of the tube portion 21 jointly seal and clamp the blood vessel wall at the end of the second blood vessel 60.

[0065] In some embodiments, the buckle member 30 and the tube portion 21 are in interference fit, so that the buckle member 30 and the tube portion 21 fit more closely to avoid blood leakage. Further, the material of the buckle member 30 is a polymer material, such as PC (Polycarbonate), ABS (Acrylonitrile Butadiene Styrene plastic), PP (polypropylene), PE (polyethylene), PTFE (Polytetrafluoroethylene), etc. Compared with metal materials, polymer materials have lower costs and are more convenient to process.

[0066] Refer to Figure 8 and Figure 12 , optionally, in an embodiment, the buckle member 30 is provided with a boss 32, and the tube portion 21 is provided with a groove 231 adapted to the boss, that is, the shape and size of the groove 231 are in one-to-one correspondence with the shape and size of the boss 32. In the assembled state, the boss 32 is arranged in the groove 231. In this way, the clamping stability between the buckle member 30 and the tube portion 21 is improved, the buckle member 30 is prevented from detaching from the tube portion 21, and at the same time, the sealing effect between the buckle member 30 and the tube portion 21 is improved. In some embodiments, the boss 32 is an annular boss, and the number of the bosses 32 is multiple, and the multiple bosses 32 are arranged at intervals along the axial direction of the buckle member 30, so as to further improve the sealing effect.

[0067] Understandably, in another embodiment, the boss 32 can also be provided on the pipe portion 21. Correspondingly, the groove 231 is opened on the buckle member 30. By arranging the boss 32 in the groove 231, it can also prevent the buckle member 30 from detaching from the pipe portion 21 and improve the sealing performance between the buckle member 30 and the inner wall of the pipe portion 21 at the same time.

[0068] After describing the specific structure of the foregoing vascular anastomosis device, a method of using one of the vascular anastomosis devices will be described below in combination with the application scenario. When the above-mentioned vascular anastomosis device is clinically used, it includes the following steps:

[0069] S10a: First, select a first support member 10 and a connecting member 20 with appropriate sizes. Then, cut a fistula opening 51 on the side of the first blood vessel 50. Subsequently, insert the first engaging portion 22 of the connecting member 20 into the first blood vessel 50 from the first fistula opening 51. Then, set the first support member 10 over the first blood vessel 50 so that the pipe portion 21 of the connecting member 20 passes through the first opening 11 of the first support member 10. Pull the connecting member 20 to make the first engaging portion 22 cooperate with the groove wall of the receiving groove 12 and be snap-fixed to clamp the blood vessel wall of the first blood vessel 50 around the first fistula opening 51.

[0070] Alternatively, S10b: First, pass the connecting member 20 through the inlet 13 of the first support member 10 into the first opening 11, and keep the state where the card slot 121 in the first support member 10 and the card protrusion 221 on the first engaging portion 22 are not engaged. Then, set the first support member 10 over the first blood vessel 50. Subsequently, cut a first fistula opening 51 on the first blood vessel 50 at the side opposite to the first opening 11 through the inlet 13. Then, rotate the first support member 10 and the connecting member 20 together by 180° so that the first fistula opening 51 corresponds to the first opening 11. Subsequently, insert the first engaging portion 22 into the first fistula opening 51 to make the first engaging portion 22 cooperate with the groove wall of the receiving groove 12 and be snap-fixed to clamp the blood vessel wall of the first blood vessel 50 along the edge of the first fistula opening 51.

[0071] S20: Subsequently, select a buckle member 30 with an appropriate size, and pre-set the buckle member 30 on the end of the transected second blood vessel 60. Insert the lining rod 70 into the port of the second blood vessel 60. After fixing the positions of the second blood vessel 60 and the buckle member 30, turn the port of the second blood vessel 60 outwards to the outer surface of the buckle member 30, and then withdraw the lining rod 70 to complete the effective connection between the buckle member 30 and the end of the second blood vessel 60.

[0072] S30: Finally, insert the buckle member 30 into the pipe portion 21 so that the buckle member 30 and the inner wall of the pipe portion 21 jointly clamp and fix the end of the blood vessel, realizing the establishment of a blood flow path connecting the first blood vessel 50 and the second blood vessel 60.

[0073] It can be understood that the above-mentioned operation scheme is only a part of the implementation methods of the vascular anastomosis device in this application. Other operation schemes that can realize the assembly of the vascular anastomosis device are also within the protection scope of this application, and this application does not make specific limitations on this.

[0074] See also Figure 15 In some other application scenarios, the vascular anastomosis device provided in one embodiment of the present application can also be used to achieve connectivity between the side of the first blood vessel 50a and the side of the second blood vessel 60a. The specific structure of the vascular anastomosis device will be described below in conjunction with this application scenario.

[0075] See also Figure 15 , which is different from the above-mentioned embodiment, Figure 15 In the illustrated embodiment, a second fistula opening (not shown) is further provided on the side of the second blood vessel 60a, and the vascular anastomosis device further includes a second support member 40, which is used to be sleeved on the second blood vessel 60a, and the second support member 40 is provided with a second opening (not shown) that can correspond to the position of the second fistula opening; the connecting member 20 further includes a second clamping portion (not shown) connected to the end of the tube portion 21 away from the first clamping portion 22, and the tube portion 21 is also passed through the second opening, and the second clamping portion is arranged on the inner wall side of the second support member 40 and can be placed in the second blood vessel 60a through the second fistula opening, and the second clamping portion cooperates with the inner wall of the second support member 40 so that the second clamping portion and the inner wall of the second support member 40 can jointly seal and clamp the blood vessel wall around the second fistula opening on the second blood vessel 60

[0076] Specifically, similar to the manner in which the first support member 10 and the first clamping portion 22 jointly clamp the first blood vessel 50a in the aforementioned embodiment, when connecting the second blood vessel 60a, the second support member 40 is sleeved on the second blood vessel 60a, and the second opening position of the second support member 40 is made to correspond to the second fistula position on the second blood vessel 60a, and the second clamping portion is placed in the second blood vessel 60a through the second fistula, and the second clamping portion is then matched with the inner wall of the second support member 40, so that the second clamping portion and the inner wall of the second support member 40 can clamp the blood vessel wall of the second blood vessel 60a along the edge of the second fistula from the inner and outer sides of the second blood vessel 60a respectively, so as to seal the edge of the second fistula and connect the blood flow channel 23 of the connecting member 20 with the second fistula, thereby establishing a blood flow path connecting the first blood vessel 50a and the second blood vessel 60a.

[0077] It should be noted that the structure of the second support member 40 is the same as that of the first support member 10 , and the second engaging portion is the same as that of the first engaging portion 22 , which will not be described in detail herein.

[0078] Alternatively, see Figure 15, in one embodiment, the vascular anastomosis device may be integrally in an I-shaped structure, and in this case, neither the first blood vessel 50a nor the second blood vessel 60a needs to be transected. Refer to Figure 16 , in another embodiment, the vascular anastomosis device may be integrally in a Z-shaped structure, and in this case, one end of the first blood vessel 50b can be transected and ligated, and one end of the second blood vessel 60b can be transected and ligated. During clinical operation, when it is necessary to connect parallel first and second blood vessels, according to the surgical requirements, an I-shaped vascular anastomosis device or a Z-shaped vascular anastomosis device can be flexibly selected.

[0079] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0080] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A vascular anastomosis device, It is characterized in that include: A first support member, wherein the first support member is provided with a first opening penetrating through inner and outer walls thereof, and the first opening is used to be opposite to a first fistula opening on a first blood vessel; as well as, A connector, comprising a tube portion and a first clamping portion connected to one end of the tube portion, the connector being provided with a blood flow channel penetrating the tube portion and the first clamping portion along the axial direction of the tube portion, the tube portion being passed through the first opening, the first clamping portion being arranged on the inner wall side of the first support member, the first clamping portion cooperating with the inner wall of the first support member to seal and clamp the vascular wall around the first fistula opening on the first blood vessel.

2. The vascular anastomosis device according to claim 1, It is characterized in that The inner wall of the first support member is provided with a receiving groove, the receiving groove is communicated with the first opening, and the first engaging portion is arranged in the receiving groove and matched with the groove wall of the receiving groove.

3. The vascular anastomosis device according to claim 2, It is characterized in that One of the groove wall of the accommodating groove and the first engaging portion is provided with a clamping protrusion, and the other is provided with a clamping groove matched with the clamping protrusion, and the clamping protrusion is clamped and matched with the clamping groove.

4. The vascular anastomosis device according to claim 2, It is characterized in that The first support member is a first sleeve. An inlet is formed on a side of the first support member away from the first opening. The inlet passes through two ends of the first support member in the axial direction of the first support member and is communicated with the inner cavity of the first support member.

5. The vascular anastomosis device according to claim 4, It is characterized in that In a plane perpendicular to the axis of the first support member, the edge of the inlet has a sawtooth structure or a wavy structure; or, In a plane parallel to the axis of the first support member, the edge of the inlet has a sawtooth structure or a wavy structure.

6. The vascular anastomosis device according to claim 4, It is characterized in that The first support member is provided with a avoidance opening, the avoidance opening is communicated with the inlet, and the position of the avoidance opening and the position of the first opening are arranged correspondingly in the circumferential direction of the first support member.

7. The vascular anastomosis device according to claim 1, Features: The inner wall of the tube and the first engaging portion are both provided with a biocompatible protective layer; and / or, The outer wall of the first support member and the outer wall of the tube portion are both covered with a biocompatible protective cover; and / or, The angle between the central axis of the tube portion and the central axis of the first blood vessel is in the range of 40° to 60°.

8. The vascular anastomosis device according to any one of claims 1 to 7, It is characterized in that The vascular anastomosis device also includes a snap-fit ​​piece, which is nested with the other end of the tube part. The snap-fit ​​piece is provided with a through hole connected to the blood flow channel. The snap-fit ​​piece cooperates with the tube part to seal and clamp the vascular wall of the second blood vessel end.

9. The vascular anastomosis device according to claim 8, It is characterized in that One of the buckle and the tube is provided with a boss, and the other is provided with a groove matched with the boss, and the boss is arranged in the groove.

10. The vascular anastomosis device according to any one of claims 1 to 7, It is characterized in that The vascular anastomosis device also includes a second support member, which is provided with a second opening running through its inner and outer walls, and the second opening is used to be opposite to the second fistula on the second blood vessel. The connecting member also includes a second clamping portion connected to the end of the tube portion away from the first clamping portion, and the tube portion is also passed through the second opening. The second clamping portion is arranged on the inner wall side of the second support member, and the second clamping portion cooperates with the inner wall of the second support member to seal and clamp the vascular wall around the second fistula on the second blood vessel.

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