Angle-foldable vascular anastomosis device

Abstract

The present invention relates to the technical field of medical devices, and discloses a foldable vascular anastomosis device, comprising two opposite unilateral anastomosis devices, each of which comprises a base assembly and an anastomosis needle ring assembly, wherein the first half ring and the second half ring of the anastomosis needle ring assembly can be rotatably docked, so that the two anastomosis needles are close to each other, the circumferential distance of the anastomosis needles is reduced, and the expansion of the blood vessel suspension is reduced. The anastomosis needle ring assembly is detachably connected to the base assembly, and the first half base and the second half base of the base assembly are rotatably docked, and the folding angle of the anastomosis needle ring assembly can be changed by controlling the folding angle of the base assembly, so that the blood vessel can be conveniently and quickly suspended on the anastomosis needle, and then the anastomosis needle ring can be reset and re-expanded, so as to slowly and stably open the lumen of the blood vessel for counter-position bridging, thereby reducing the risk of blood vessel damage, and the operation is simple, and the pulling steps of loading the blood vessel to the anastomosis needle ring are reduced, which can save operation time and improve the safety of the operation.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a vascular anastomosis device capable of being folded at an angle. Background Art

[0002] In recent years, with the increasing incidence of vascular diseases such as vasodilatation, occlusive diseases and vascular injuries, clinical treatment technologies such as vascular transplantation, vascular suture and vascular repair have been put forward with higher requirements. Among them, vascular anastomosis technology is widely used in surgical fields such as vertebral artery reconstruction, free flap transplantation, oral and maxillofacial reconstruction and head and neck reconstruction. In particular, vascular anastomosis technology in organ transplantation is directly related to whether the tissues and organs at the distal end of the blood vessels can survive normally. Therefore, vascular anastomosis technology occupies an extremely important position in this field.

[0003] In the vascular anastomosis devices used in the previous vascular anastomosis technology, most of them require medical personnel to operate to hang the blood vessel on the anastomosis needle on the anastomosis needle ring. In this process, the blood vessel is usually directly pulled by medical forceps or other equipment or the blood vessel is pre-cut to make a notch so that the diameter or end opening of the blood vessel can be temporarily expanded, so that the blood vessel can cooperate with the anastomosis needle ring and be hung on the anastomosis needle. However, when the anastomosis needle ring is used, it is difficult to operate when hanging the blood vessel on the anastomosis needle ring. The blood vessel needs to be pulled around continuously. This operation is not only easy to damage the blood vessel, but also greatly increases the risk of blood vessel damage; or it leaves potential blood vessel ruptures, which will cause the upper pressure limit of the blood vessel to be reduced; at the same time, it will cause the length of the connected blood vessel to be reduced, which is easy to cause the problem that the blood vessel is not long enough to bridge normally to complete the anastomosis. Summary of the invention

[0004] The purpose of the present invention is to provide a foldable vascular anastomosis device, which can reduce the need for expansion when the blood vessel is suspended, conveniently and quickly suspend the blood vessel on the anastomosis needle, reduce the risk of blood vessel damage, save operation time, and improve the safety of the operation.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A foldable vascular anastomosis device comprises two unilateral anastomosis devices arranged opposite to each other, each of the unilateral anastomosis devices comprises a base assembly and an anastomosis needle ring assembly, the anastomosis needle ring assembly comprises a first half ring and a second half ring, the two ends of the first half ring are respectively connected to the two ends of the second half ring to form a whole ring, the line connecting the two connected positions is the rotation center line, the first half ring and the second half ring can rotate relative to each other with the rotation center line as the rotation axis, so that the anastomosis needle of the first half ring and the anastomosis needle of the second half ring are relatively close; the base assembly comprises a first half base and a second half base, the first half base and the second half base are rotationally connected with the rotation center line as the rotation axis, the first half base is selectively connected to the first half ring, and the second half base is selectively connected to the second half ring.

[0007] As an optional technical solution for the foldable vascular anastomosis device, the base assembly is provided with a fixing buckle, and the fixing buckle can make the first half base and the second half base rotate relative to each other to a preset angle and then be fixed.

[0008] As an optional technical solution for a foldable vascular anastomosis device, when the first half ring and the second half ring are rotated relative to each other to an extreme angle, the minimum spacing between the anastomosis needle of the first half ring and the second half ring is greater than or equal to the wall thickness of the blood vessel, the minimum spacing between the anastomosis needle of the second half ring and the first half ring is greater than or equal to the wall thickness of the blood vessel, the preset angle is greater than or equal to the extreme angle, and the preset angle is less than or equal to 180.

[0009] As an optional technical solution for a foldable vascular anastomosis device, the fixed buckle includes a flexible rack and a tooth sleeve, the tooth sleeve includes a snap-fitting tooth portion and an I-shaped door, any one of the first half base and the second half base is fixedly connected to one end of the flexible rack, and the other is fixedly provided with the snap-fitting tooth portion and the I-shaped door, and the other end of the flexible rack passes through the I-shaped door and selectively engages with the snap-fitting tooth portion.

[0010] As an optional technical solution for a foldable vascular anastomosis device, the base assembly also includes a first connecting member and an assembly member, the axis of the first connecting member coincides with the rotation center line, the first half base and the second half base are both rotatably mounted on the outer periphery of the first connecting member, and the portion of the first connecting member protruding from the first half base and the second half base is detachably connected to the assembly member.

[0011] As an optional technical solution for the foldable vascular anastomosis device, the foldable vascular anastomosis device also includes an alignment module, and assembly slots are provided on both sides of the assembly part. The assembly part is connected with a closing device for assisting the docking of the two unilateral anastomosis devices through the assembly slots.

[0012] As an optional technical solution for a foldable vascular anastomosis device, the first half base is provided with a first plug-in portion protruding along a direction perpendicular to the rotation center line, and the second half base is provided with a first plug-in groove, the first plug-in portion can be placed in the first plug-in groove, and the first connecting piece passes through the first plug-in portion and the opposite side groove walls of the first plug-in groove.

[0013] As an optional technical solution for a foldable vascular anastomosis device, either the first half base or the second half base is provided with a limiting boss on the side away from the anastomosis needle, and the other one selectively abuts against the limiting boss to prevent the included angle between the first half base and the second half base from being greater than 180°.

[0014] As an optional technical solution for a foldable vascular anastomosis device, the anastomosis needle ring assembly also includes a second connecting piece, the axis of the second connecting piece coincides with the rotation center line, the butt end of the first half ring is protruding with a second plug-in portion in a direction perpendicular to the rotation center line, the butt end of the second half ring is provided with a second plug-in groove, the second plug-in portion can be placed in the second plug-in groove, and the second plug-in portion and the side walls on opposite sides of the second plug-in groove are rotatably sleeved on the outer periphery of the second connecting piece.

[0015] As an optional technical solution for the foldable vascular anastomosis device, the first half base and / or the second half base is provided with an installation groove, and the outer periphery of the first half ring and / or the second half ring is convexly provided with a sliding portion, and the sliding portion can be slidably placed in the installation groove.

[0016] Beneficial effects of the present invention:

[0017] The foldable vascular anastomosis device provided by the present invention comprises two unilateral anastomosis devices arranged opposite to each other, each unilateral anastomosis device comprises a base assembly and an anastomosis needle ring assembly, the anastomosis needle ring assembly comprises a first half ring and a second half ring, the two ends of the first half ring are respectively connected to the two ends of the second half ring to form a whole ring, the line connecting the two connecting positions is the rotation center line, the first half ring and the second half ring can rotate relative to each other with the rotation center line as the rotation axis, so that the anastomosis needle of the first half ring and the anastomosis needle of the second half ring are relatively close, the circumferential distance of the anastomosis needle is shortened, and the expansion demand when the blood vessel is suspended is reduced. The base assembly comprises a first half base and a second half base, the first half base and the second half base are rotatably connected with a rotation center line as a rotation axis, the first half base is selectively connected to the first half ring, and the second half base is selectively connected to the second half ring. The folding angle of the base assembly can be controlled to change the folding angle of the anastomotic needle ring assembly, thereby realizing convenient and quick hanging of the blood vessel on the anastomotic needle, and then the anastomotic needle ring can be reversed and reset to reopen the lumen of the blood vessel for aligning and bridging, thereby reducing the risk of blood vessel damage. At the same time, the operation is simple, and the pulling steps for loading the blood vessel onto the anastomotic needle ring are reduced, which can save operation time and improve the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a single-side stapler of a vascular anastomosis device with a foldable angle provided in a specific embodiment of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a base assembly and a fixing buckle of a foldable vascular anastomosis device provided in a specific embodiment of the present invention (assembly parts are not shown);

[0020] Figure 3 It is a structural schematic diagram of the first half base and the tooth sleeve of the foldable vascular anastomosis device provided in a specific embodiment of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the second half base of the foldable vascular anastomosis device provided in a specific embodiment of the present invention;

[0022] Figure 5 It is a structural schematic diagram of an assembly part of a vascular anastomosis device with a foldable angle provided in a specific embodiment of the present invention;

[0023] Figure 6 It is a schematic structural diagram of an anastomotic needle ring assembly of a foldable vascular anastomotic device provided in a specific embodiment of the present invention.

[0024] In the figure:

[0025] 10. Unilateral stapler;

[0026] 100, base assembly; 101, mounting slide; 110, first half base; 111, first plug-in portion; 120, second half base; 121, first plug-in slot; 122, limiting boss; 130, first connector; 140, assembly member; 141, assembly slot; 142, screw-connected blind hole;

[0027] 200, anastomotic needle ring assembly; 201, sliding portion; 202, anastomotic needle; 210, first half ring; 211, second plug-in portion; 220, second half ring; 221, second plug-in groove; 230, second connecting member;

[0028] 310. Flexible rack; 320. Tooth sleeve; 321. Snap-fit ​​tooth portion; 322. I-shaped door. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0033] like Figures 1 to 6 As shown in the figure, the present invention discloses a foldable vascular anastomosis device, including two unilateral staplers 10 arranged opposite to each other, each unilateral stapler 10 includes a base assembly 100 and an anastomosis needle ring assembly 200, and the anastomosis needle ring assembly 200 includes a first half ring 210 and a second half ring 220, and the two ends of the first half ring 210 are respectively connected to the two ends of the second half ring 220 to form a whole ring, and the line connecting the two connecting positions is the rotation center line. The first half ring 210 and the second half ring 220 can rotate relative to each other with the rotation center line as the rotation axis, so that the anastomosis needle 202 of the first half ring 210 and the anastomosis needle 202 of the second half ring 220 are relatively close, reducing the circumferential distance of the anastomosis needle 202, so as to reduce the expansion demand when the blood vessel is suspended. The anastomotic needle ring assembly 200 is detachably connected to the base assembly 100, and the base assembly 100 includes a first half base 110 and a second half base 120. The first half base 110 and the second half base 120 are rotatably connected with a rotation center line as a rotation axis. The first half base 110 is selectively connected to the first half ring 210, and the second half base 120 is selectively connected to the second half ring 220. The folding angle of the anastomotic needle ring assembly 200 can be controlled to change the folding angle, thereby realizing convenient and quick hanging of the blood vessel on the anastomotic needle 202.

[0034] First, assemble the unilateral stapler 10, and the base assembly 100 and the anastomotic needle ring assembly 200 of the unilateral stapler 10 are both in a flat initial state; fold the base assembly 100, and the first half base 110 drives the first half ring 210, and the second half base 120 drives the second half ring 220, until the included angle between the first half ring 210 and the second half ring 220 reaches a suitable angle, at which time the circumferential connecting line size of all the anastomotic needles 202 matches the circumferential size of the blood vessel, and the anastomotic needles 202 can easily penetrate the blood vessel wall; pull the blood vessel from the anastomotic needles 202 to the anastomotic needles 202, and then fold the blood vessel. The back of the ring assembly 200 passes through and extends into the position of the anastomosis needle 202, and then the blood vessel wall is hooked with the anastomosis needle 202 in turn. The order of hooking the needle is generally from top to bottom, from the middle to the sides; then, the anastomosis needle ring assembly 200 can be reversed and re-expanded to the initial state of the plane to slowly and steadily open the lumen of the blood vessel; finally, the fully expanded unilateral stapler 10 is aligned using an alignment tool or an alignment instrument to bridge the blood vessel. After removing the base assembly 100, the anastomosis needle ring and the blood vessel can be repeatedly clamped to ensure the success of the blood vessel anastomosis. The use of the foldable vascular anastomosis device can realize the quick and convenient loading of the blood vessel onto the anastomosis needle ring through the overall foldable structure, effectively reducing the risk of blood vessel damage. At the same time, the operation is simple, and the pulling steps of loading the blood vessel onto the anastomosis needle ring are reduced, which can save operation time and improve the safety of the operation.

[0035] Specifically, a fixing buckle is provided on the base assembly 100, and the fixing buckle can selectively make the first half base 110 and the second half base 120 rotate relative to each other to a preset angle and then be fixed, so that the base assembly 100 can be stabilized at a preset angle before the needle hanging operation is performed, thereby improving the structural stability of the foldable vascular anastomosis device, making it more reliable during operation and avoiding unnecessary damage to the blood vessels.

[0036] In this embodiment, when the first half ring 210 and the second half ring 220 rotate relative to each other to the limit angle, the minimum spacing between the anastomotic needle 202 of the first half ring 210 and the second half ring 220 is greater than or equal to the wall thickness of the blood vessel. Similarly, the minimum spacing between the anastomotic needle 202 of the second half ring 220 and the first half ring 210 is greater than or equal to the wall thickness of the blood vessel, so as to ensure that the blood vessel can smoothly pass through the anastomotic needle ring assembly 200 and be attached. The preset angle needs to be greater than or equal to the limit angle, and the preset angle is less than or equal to 180°. The selection of the preset angle is directly related to the specifications of the blood vessel. Therefore, for blood vessels of different diameters, different elasticities and health conditions, a personalized preset angle can be formulated to expand the scope of application of the foldable vascular anastomosis device.

[0037] Further, the fixing buckle includes a flexible rack 310 and a tooth sleeve 320, the tooth sleeve 320 includes a snap-on tooth portion 321 and an I-shaped door 322, any one of the first half base 110 and the second half base 120 is fixedly connected to one end of the flexible rack 310, and the other is fixedly provided with the snap-on tooth portion 321 and the I-shaped door 322, and the other end of the flexible rack 310 passes through the I-shaped door 322 and selectively engages with the snap-on tooth portion 321. Exemplarily, two columns with threaded holes are provided on the side of the second half base 120 away from the anastomosis needle 202, the flexible rack 310 is provided in a "T"-shaped structure, the ears on both sides of the flexible rack 310 are respectively connected to the two columns, and the flexible rack 310 is fixed to the second half base 120 by screws passing through the ears and threadedly connected with the columns. The first half base 110 and the flexible rack 310 are provided with a snap-fitting tooth portion 321 and an I-shaped door 322 on the same side. The snap-fitting tooth portion 321 is engaged with the flexible rack 310 to control the displacement of the flexible rack 310. Meanwhile, during the folding process, the flexible rack 310 can bend and displace along with the bending of the base assembly 100. During this process, the flexible rack 310 moves slowly and can control the folding angle of the fixed base assembly 100. Meanwhile, the base assembly 100 and the anastomotic needle ring assembly 200 can also pause during the folding or unfolding process; The door 322 can restrict the flexible rack 310 from tilting and swinging up and down. When the base assembly 100 is in a flat initial state, the flexible rack 310 extends to the maximum length relative to the I-shaped door 322. When the base assembly 100 is folded to the extreme angle position, the flexible rack 310 extends to the minimum length relative to the I-shaped door 322. The specific setting of the extreme angle should be related to the length of the flexible rack 310 to avoid the flexible rack 310 from slipping out of the I-shaped door 322 due to the length being too small, and to maintain a stable control of the folding angle of the fixed base assembly 100. The structure of the fixed buckle can fix the folding angle of the anastomotic needle ring, realizing the multi-angle selection of the blood vessel hanging on the anastomotic needle ring.

[0038] Optionally, the flexible rack 310 can be made of a tough plastic material to form an integrated structure, which is simple to produce and low in cost; a metal chain can also be selected as the flexible rack 310, which has a longer service life, higher fixing accuracy and greater stability.

[0039] Specifically, the base assembly 100 further includes a first connecting member 130 and an assembly member 140, the axis of the first connecting member 130 coincides with the rotation center line, the first half base 110 and the second half base 120 are both rotatably sleeved on the outer periphery of the first connecting member 130, and the portion of the first connecting member 130 protruding from the first half base 110 and the second half base 120 is detachably connected to the assembly member 140. In this embodiment, the portion of the first connecting member 130 protruding from the first half base 110 and the second half base 120 is provided as a screw connection portion, and the assembly member 140 is correspondingly provided with a screw connection blind hole 142, and the first connecting member 130 is threadedly connected to the screw connection blind hole 142 through the screw connection portion to be installed with the assembly member 140.

[0040] In this embodiment, the first half base 110 is provided with a first plug-in portion 111 protruding in a direction perpendicular to the rotation center line, forming a "convex"-shaped structure; the second half base 120 is provided with a first plug-in slot 121, forming a "concave"-shaped structure, and the first plug-in portion 111 can be embedded in the first plug-in slot 121; the first half base 110 and the second half base 120 are firmly fixed by the first connecting member 130 passing through the groove walls on the opposite sides of the first plug-in slot 121 and the first plug-in portion 111 sandwiched in the middle. Exemplarily, a limiting head is provided at one end of the first connecting member 130 away from the screw connection portion, and the limiting head abuts against the second half base 120 to limit the relative installation position of the first connecting member 130 and the first half base 110 and the second half base 120, so as to prevent the first connecting member 130 from slipping off the first half base 110 and the second half base 120.

[0041] Further, any one of the first half base 110 and the second half base 120 is provided with a limiting boss 122 on a side away from the anastomotic needle 202, and the other selectively abuts against the limiting boss 122 to prevent the angle between the first half base 110 and the second half base 120 from being greater than 180°. In this embodiment, the limiting boss 122 is provided on the second half base 120 to prevent the base assembly 100 from folding again into an obtuse angle when it is unfolded into a plane.

[0042] In the present embodiment, the anastomotic needle ring assembly 200 also includes a second connecting member 230, the axis of the second connecting member 230 coincides with the rotation center line, the butt end of the first half ring 210 is provided with a second plug-in portion 211 in a direction perpendicular to the rotation center line, forming a "convex" shaped structure; the butt end of the second half ring 220 is provided with a second plug-in groove 221, forming a "concave" shaped structure, the second plug-in portion 211 can be embedded in the second plug-in groove 221, the second plug-in portion 211 and the second plug-in groove 221 The side walls on both sides are rotatably mounted on the outer periphery of the second connecting member 230, together forming a hinge structure, which can control the folding angle of the anastomotic needle ring assembly 200, and the first half ring 210 and the second half ring 220 together constitute a complete anastomotic needle ring. Similarly, a limiting boss 122 may be provided on the side of the second half ring 220 away from the anastomotic needle 202 to limit the folding angle of the anastomotic needle ring assembly 200 to a maximum of 180° flat angle, thereby preventing excessive folding that causes the needle tips of the anastomotic needle 202 to face each other and increasing the pulling force to avoid damaging the blood vessel.

[0043] Specifically, the first half base 110 and / or the second half base 120 is provided with an installation groove 101, and a sliding portion 201 is convexly provided on the outer periphery of the first half ring 210 and / or the second half ring 220. The sliding portion 201 and the installation groove 101 are arranged in a one-to-one correspondence, and the sliding portion 201 can be slidably placed in the installation groove 101. The ear-shaped sliding portion 201 is provided to reduce the process difficulty of the sliding structure and better facilitate the disassembly of the base assembly 100 and the anastomosis needle ring assembly 200.

[0044] Exemplarily, the main body of the assembly part 140 is approximately a cuboid, and symmetrical assembly slots 141 are respectively provided on the two sides of the assembly part 140, and the assembly part 140 is easily connected with the closing device through the assembly slots 141. The closing device is used to assist the two unilateral staplers 10 to be stably aligned and connected, and is used in conjunction with the foldable vascular anastomosis device to facilitate accurate vascular bridging anastomosis, which is beneficial to the therapeutic effect of vascular repair.

[0045] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A vascular anastomosis device capable of being folded at an angle, characterized in that: The invention comprises two unilateral staplers (10) arranged opposite to each other, each of the unilateral staplers (10) comprising a base assembly (100) and an anastomotic needle ring assembly (200), the anastomotic needle ring assembly (200) comprising a first half ring (210) and a second half ring (220), the two ends of the first half ring (210) are respectively connected to the two ends of the second half ring (220) to form a full ring, the connecting line of the two connecting positions is the rotation center line, the first half ring (210) and the second half ring (220) can rotate relative to each other with the rotation center line as the rotation axis , so that the anastomosis needle (202) of the first half ring (210) and the anastomosis needle (202) of the second half ring (220) are relatively close; the base assembly (100) includes a first half base (110) and a second half base (120), the first half base (110) and the second half base (120) are rotatably connected with the rotation center line as the rotation axis, the first half base (110) is selectively connected to the first half ring (210), and the second half base (120) is selectively connected to the second half ring (220).

2. The foldable vascular anastomosis device according to claim 1, characterized in that: The base assembly (100) is provided with a fixing buckle, and the fixing buckle can enable the first half base (110) and the second half base (120) to rotate relative to each other to a preset angle and then be fixed.

3. The foldable vascular anastomosis device according to claim 2, characterized in that: When the first half ring (210) and the second half ring (220) are relatively rotated to an extreme angle, the minimum distance between the anastomotic needle (202) of the first half ring (210) and the second half ring (220) is greater than or equal to the wall thickness of the blood vessel, and the minimum distance between the anastomotic needle (202) of the second half ring (220) and the first half ring (210) is greater than or equal to the wall thickness of the blood vessel; the preset angle is greater than or equal to the extreme angle, and the preset angle is less than or equal to 180°.

4. The foldable vascular anastomosis device according to claim 3, characterized in that: The fixing buckle comprises a flexible rack (310) and a tooth sleeve (320), the tooth sleeve (320) comprises a snap-fit ​​tooth portion (321) and an I-shaped door (322), any one of the first half base (110) and the second half base (120) is fixedly connected to one end of the flexible rack (310), and the other is fixedly provided with the snap-fit ​​tooth portion (321) and the I-shaped door (322), and the other end of the flexible rack (310) passes through the I-shaped door (322) and selectively meshes with the snap-fit ​​tooth portion (321).

5. The foldable vascular anastomosis device according to claim 1, characterized in that: The base assembly (100) further comprises a first connecting member (130) and an assembly member (140), wherein the axis of the first connecting member (130) coincides with the rotation center line, the first half base (110) and the second half base (120) are both rotatably sleeved on the outer periphery of the first connecting member (130), and the portion of the first connecting member (130) protruding from the first half base (110) and the second half base (120) is detachably connected to the assembly member (140).

6. The foldable vascular anastomosis device according to claim 5, characterized in that: Both sides of the assembly part (140) are provided with assembly slots (141), and the assembly part (140) is connected to a closing device for assisting the docking of the two unilateral staplers (10) through the assembly slots (141).

7. The foldable vascular anastomosis device according to claim 5, characterized in that: The first half base (110) is provided with a first plug-in portion (111) protruding in a direction perpendicular to the rotation centerline, and the second half base (120) is provided with a first plug-in slot (121), the first plug-in portion (111) can be placed in the first plug-in slot (121), and the first connecting member (130) passes through the first plug-in portion (111) and the first plug-in slot (121) on opposite side walls.

8. The foldable vascular anastomosis device according to any one of claims 1 to 7, characterized in that: Any one of the first half base (110) and the second half base (120) is provided with a limiting boss (122) on the side away from the anastomosis needle (202), and the other selectively abuts against the limiting boss (122) to prevent the angle between the first half base (110) and the second half base (120) from being greater than 180°.

9. The foldable vascular anastomosis device according to any one of claims 1 to 7, characterized in that: The anastomotic needle ring assembly (200) also includes a second connecting member (230), the axis of which coincides with the rotation center line, the butt end of the first half ring (210) is provided with a second plug-in portion (211) protruding in a direction perpendicular to the rotation center line, the butt end of the second half ring (220) is provided with a second plug-in groove (221), the second plug-in portion (211) can be placed in the second plug-in groove (221), and the second plug-in portion (211) and the second plug-in groove (221) The side walls on both sides of the second plug-in portion (211) and the second plug-in groove (221) are both rotatably sleeved on the outer periphery of the second connecting member (230).

10. The foldable vascular anastomosis device according to any one of claims 1 to 7, characterized in that: The first half base (110) and / or the second half base (120) are provided with an installation slide groove (101), and the outer periphery of the first half ring (210) and / or the second half ring (220) is convexly provided with a sliding portion (201), and the sliding portion (201) can be slidably placed in the installation slide groove (101).

Images