Vascular anastomosis devices and tools

Abstract

The present invention provides a blood vessel sheathing anastomosis device and tool, the device includes a male sleeve and a female sleeve, the male sleeve includes a first base and a first annular wall, the first annular wall extends from the first base to a distal end; the female sleeve includes a second base and a second annular wall, the second annular wall extends from the second base to a distal end; the outer wall surface of the first annular wall and the inner wall surface of the second annular wall match each other, so that in an anastomosing state, the first annular wall can be inserted into the second annular wall, and an anastomosis surface for anastomosing two blood vessel ends is formed between the outer wall surface of the first annular wall and the inner wall surface of the second annular wall, and the anastomosis surface is sequentially formed into a clamping section, a releasing section and a hooking section in the direction in which the first annular wall extends to the distal end, so that the two blood vessel ends can be clamped by the outer wall surface of the first annular wall and the inner wall surface of the second annular wall in the clamping section, can be not clamped by the outer wall surface of the first annular wall and the inner wall surface of the second annular wall in the releasing section, and can be braced on the outer wall surface of the first annular wall in the hooking section.

Description

Technical Field

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

[0002] Vascular anastomosis surgery has always been a technical problem that the industry urgently needs to overcome due to the small size and thin walls of blood vessels. In the existing technology, anastomosis rings with a pinhole structure or anastomosis devices with an inner and outer tube sleeve structure are used to achieve anastomosis of blood vessel ends. The pinhole structure of the anastomosis ring will penetrate the blood vessel wall. The thin wall of the blood vessel has low strength. After being penetrated, the entire blood vessel wall is easily damaged, affecting the anastomosis strength. When using a sleeve-type anastomosis device, the area of ​​the everted blood vessel wall available for clamping is small, so the local pressure of the clamping force provided by the inner and outer tubes is large. Excessive local pressure can easily cause necrosis of the blood vessel wall, resulting in poor anastomotic sealing. In addition, due to the small size of the blood vessel, the size of the anastomosis device is also correspondingly small. During the process of installing the anastomosis device with the tool and extending it into the wound area, if the tool is opened too much, the anastomosis device can easily separate from the tool and fall off, seriously affecting the efficiency of the operation. And a slight change in the distance the tool is opened will cause the anastomosis process of the vascular sleeve anastomosis device to be unsmooth. Summary of the Invention

[0003] The invention provides a blood vessel sheathing and anastomosis device and a tool.

[0004] Specifically, the present invention is achieved through the following technical solutions:

[0005] In a first aspect, an embodiment of the present invention provides a vascular sleeve anastomosis device, comprising a male sleeve and a female sleeve, wherein the male sleeve and the female sleeve are in an anastomotic state for clamping two blood vessel ends, the male sleeve comprising a first base and a first annular wall, the first annular wall extending distally from the first base; the female sleeve comprising a second base and a second annular wall, the second annular wall extending distally from the second base; the outer wall surface of the first annular wall and the inner wall surface of the second annular wall match each other, so that in the anastomotic state, the first annular wall can be inserted into the second annular wall, and an anastomotic surface for anastomosing the two blood vessel ends is formed between the outer wall surface of the first annular wall and the inner wall surface of the second annular wall, the anastomotic surface being formed in sequence toward the direction in which the first annular wall extends distally into a clamping section, a releasing section, and a hooking section, so that the two blood vessel ends can be clamped by the outer wall surface of the first annular wall and the inner wall surface of the second annular wall in the clamping section, can be not clamped by the outer wall surface of the first annular wall and the inner wall surface of the second annular wall in the releasing section, and can be braced on the outer wall surface of the first annular wall in the hooking section.

[0006] In some embodiments, the outer wall surface of the first annular wall forms a radially outwardly protruding annular ridge at the hooking section, and the angle between the slope surface of the annular ridge close to the first base side and the outer wall of the first annular wall is larger than the angle between the slope surface away from the first base side and the outer wall of the first annular wall.

[0007] In some embodiments, the male sleeve also includes a third annular wall, which extends from the first base to the distal end. The third annular wall is arranged on the outer periphery of the first annular wall and is radially spaced to form annular grooves, so that in the said fitting state, the distal end of the second annular wall can be inserted into the annular groove, thereby allowing the third annular wall to provide radial limitation to the second annular wall.

[0008] In some embodiments, the third annular wall extends distally from the first base shorter than the first annular wall, so that in the engaged state, the annular groove and the portion of the first annular wall corresponding to the clamping section do not overlap at least partially in the axial direction.

[0009] In some embodiments, the second annular wall is stepped in the axial direction, and the stepped second annular wall is provided with at least a small diameter section and a large diameter section, the large diameter section is located close to the second base side, and the small diameter section is located away from the second base side, wherein the axial dimension and radial dimension of the small diameter section match the annular groove so that the small diameter section can be inserted into the annular groove in the matching state, and the step portion of the large diameter section close to the small diameter section can be tightly pressed against the end of the third annular wall.

[0010] In some embodiments, the second annular wall is formed with an axially extending slot, and the axially extending length of the slot at least partially covers a portion of the second annular wall corresponding to the clamping section.

[0011] In a second aspect, an embodiment of the present invention provides a tool for operating the vascular sheathing anastomosis device described in the first aspect to perform vascular anastomosis, comprising a pair of clamp handles and a pair of clamp arms, each clamp handle being pivotally connected to one of the pair of clamp arms and slidingly connected to the other of the pair of clamp arms, characterized in that a first locker is provided between the pair of clamp handles for locking the pair of clamp handles at any closing angle; a second locker is provided at the tail of the pair of clamp handles for locking the pair of clamp handles at a final anastomosis angle; and a positioner is provided at the ends of the pair of clamp arms for simultaneously positioning the male sleeve and the female sleeve in the circumferential, axial and radial directions, so that the male sleeve and the female sleeve are aligned with each other.

[0012] In some embodiments, the first locking device includes an arcuate rack and a lock buckle, one end of the arcuate rack is connected to one of a pair of clamp arms, and the lock buckle is pivoted to the other of the pair of clamp arms so as to be able to pivot at least between a first angle and a second angle, wherein the lock buckle is formed with an opening to accommodate the other end of the arcuate rack to pass through the opening during the closing process of the pair of clamp handles, and when the pair of clamp handles are at any closing angle, the lock buckle can pivot to the first angle, thereby utilizing the edge of the opening to lock with the tooth surface of the arcuate rack.

[0013] In some embodiments, one end of the arc-shaped rack is pivotally connected to one of a pair of clamp arms, so that the other end of the arc-shaped rack can pass through the opening during the closing process of the pair of clamp arms; and a protrusion is also provided at one end of the arc-shaped rack, and an arc-shaped plate is provided on the clamp arm, and the protrusion matches the arc-shaped plate, so that the arc-shaped plate can support the arc-shaped rack in a locking position through the protrusion, thereby locking the opening edge of the lock buckle with the tooth surface of the arc-shaped rack.

[0014] In some embodiments, the locator includes a locating seat, a shaft seat and a locking pin. The fork arm of the locating seat matches the first base and the second base, thereby positioning the male sleeve and the female sleeve in the circumferential and axial directions at the same time; the shaft seat is used to insert the end of the clamping arm, and a bevel groove is formed on the side of the shaft seat. The locking pin can be inserted into the bevel groove from the outside of the clamping arm, thereby positioning the male sleeve and the female sleeve in the radial direction.

[0015] According to an embodiment of the present invention, a release section is separately provided between the clamping section and the hooking section of the anastomosis surface, the hooking section is used to temporarily position the blood vessel stave, the clamping section is used to stably clamp the blood vessel stave, and the release section is used to provide a low-pressure tightening condition for the blood vessel stave. Even if the blood vessel stave in the clamping section becomes necrotic, the blood vessel stave in the release section can be kept in a good anastomotic state, thereby ensuring the anastomosis effect; the first locking device can keep the clamping handle locked at any closing angle, the second locking device can keep the clamping handle locked at the final anastomosis angle, and the positioner can keep the blood vessel sheath anastomosis device installed on the tool stably positioned in the circumferential, axial and radial directions, thereby avoiding unnecessary subtle movements of the vascular anastomosis surgical instruments and ensuring the smoothness of the anastomosis operation.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] Figure 1 1 is a schematic diagram of a vascular sheathing and anastomosis device in an embodiment of the present invention in an unanastomotic state;

[0019] Figure 2 is a cross-sectional view of a vascular sheathing and anastomosis device in an embodiment of the present invention in an anastomotic state;

[0020] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0021] Figure 4 is a schematic diagram of a tool in one embodiment of the present invention;

[0022] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0023] Figure 6 yes Figure 4 A partial enlarged view of point C in the middle;

[0024] Figure 7 yes Figure 4 A partial enlarged view of point D in the middle;

[0025] Figure 8 is a schematic diagram of a tool in a final anastomotic angle state according to an embodiment of the present invention;

[0026] Figure 9 is a schematic diagram of a positioner in one embodiment of the present invention.

[0027] Reference numerals:

[0028] 01: The broken end of the first blood vessel; 02: The broken end of the second blood vessel;

[0029] 10: male sleeve; 11: first annular wall; 12: third annular wall; 13: first base; 14: annular ridge;

[0030] 20: female sleeve; 21: large diameter section; 22: small diameter section; 23: second base; 24: slot;

[0031] 31: Clamping handle; 32: Clamping arm; 33: Positioner; 331: Positioning seat; 332: Shaft seat; 333: Locking pin; 334: Inclined groove; 341: Arc-shaped rack; 342: Locking buckle; 343: Boss; 344: Arc-shaped plate; 345: Long wall panel; 346: Opening; 351: Locking piece. DETAILED DESCRIPTION

[0032] The present invention will now be discussed with reference to several embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present invention, rather than implying any limitation on the scope of the present invention.

[0033] As used herein, the term "including" and its variations are to be interpreted as open-ended terms meaning "including but not limited to," the terms "embodiment" and "one embodiment" are to be interpreted as "at least one embodiment," and the term "another embodiment" is to be interpreted as "at least one other embodiment." The terms "first," "second," and the like may refer to different or identical objects. The term "configured" is not limited to direct or indirect connections, nor is it limited to a specific method of connection. Other explicit and implicit definitions may be included below.

[0034] In the following description, some specific numerical values ​​or numerical ranges may be involved. It should be understood that these numerical values ​​and numerical ranges are merely exemplary, and they may be helpful in putting the idea of ​​the present invention into practice. However, the description of these examples is not intended to limit the scope of the present invention in any way. According to specific application scenarios and requirements, these numerical values ​​or numerical ranges can be set separately.

[0035] As mentioned above, the existing vascular anastomosis methods have problems with poor sealing of the vascular anastomosis due to penetration or necrosis of the vascular wall during the anastomosis process, as well as problems with the anastomosis device falling off and the anastomosis device being unable to align due to the tools during the anastomosis operation. Figures 1 to 9 The structure and working principle of the vascular sheath anastomosis device and tool according to the exemplary embodiment of the present invention are described below. Figure 1-Figure 3 As shown, the vascular anastomosis device according to an embodiment of the present invention generally comprises a matching male sleeve 10 and female sleeve 20. The male sleeve 10 can be inserted into the female sleeve 20, and the male sleeve 10 and the female sleeve 20 form an anastomotic surface to clamp and anastomose the two vascular stumps. For example, the male sleeve 10 and the female sleeve 20 can be made of a degradable magnesium alloy material, thereby avoiding the need for a secondary surgery to remove the male sleeve 10 and the female sleeve 20.

[0036] To achieve the anastomosis function, the male sleeve 10 of the embodiment of the present invention includes a first base 13, a first annular wall 11, and a third annular wall 12. The first base 13 is annular and has a hollow hole. The first annular wall 11 and the third annular wall 12 both extend distally from the first base 13. The first annular wall 11 is hollow and cylindrical. The hollow first base 13 and the first annular wall 11 form an axially extending hollow structure of the male sleeve 10. The third annular wall 12 is also hollow and cylindrical and surrounds the radially outer side of the first annular wall 11. The first and third annular walls 11 and 12 are radially spaced apart, forming an annular groove. The first annular wall 11 is axially longer than the third annular wall 12.

[0037] The female sleeve 20 of the embodiment of the present invention includes a second base 23 and a second annular wall. The second base 23 is annular and has a hollow hole. The second annular wall extends distally from the second base 23. The second annular wall is hollow and cylindrical. The hollow second base 23 and the second annular wall form an axially extending hollow structure of the female sleeve 20.

[0038] In the embodiment of the present invention, the male sleeve 10 is defined as the "proximal end" on the side of the first base 13, and is defined as the "distal end" away from the first base 13; the female sleeve 20 is defined as the "proximal end" on the side of the second base 23, and is defined as the "distal end" away from the second base 23. Those skilled in the art will understand that "proximal end" and "distal end" are only defined for the directions of the male sleeve 10 and the female sleeve 20 themselves. In the matched state, the "proximal end" of the male sleeve 10 is in the same direction as the "distal end" of the female sleeve 20.

[0039] The first annular wall 11, the second annular wall and the third annular wall 12 all have an inner wall surface and an outer wall surface, wherein an annular groove is formed between a portion of the outer wall surface of the first annular wall 11 and the inner wall surface of the third annular wall 12, and a matching surface is formed between the other portion of the outer wall surface of the first annular wall 11 and the inner wall surface of the second annular wall.

[0040] In one embodiment, the outer wall of the second annular wall is axially stepped with varying diameters, and the stepped shape is composed of a small diameter section 22 and a large diameter section 21. The large diameter section 21 extends distally from the second base 23 for a distance, and then the small diameter section 22 continues to extend distally from the end of the large diameter section 21. With this arrangement, the first annular wall 11, the small diameter section 22 of the second annular wall, the large diameter section 21 of the second annular wall, and the third annular wall 12 match each other in the axial and radial directions. Therefore, when the male sleeve 10 and the female sleeve 20 are nested and engaged, the first annular wall 11 of the male sleeve 10 can be inserted into the second annular wall of the female sleeve 20, and the small diameter section 22 of the second annular wall of the female sleeve 20 can be inserted into the annular groove of the male sleeve 10. Simultaneously, the third annular wall 12 of the male sleeve 10 and the large diameter section 21 of the second annular wall of the female sleeve 20 can abut against each other in the axial direction. With this arrangement, the outer wall surface of the first annular wall 11 and the inner wall surface of the second annular wall form a matching surface, and the two blood vessel ends are simultaneously sheathed in the matching surface.

[0041] The anastomotic surface of the embodiment of the present invention is divided into a clamping section L1, a release section L2, and a hooking section L3. The three sections are arranged in sequence toward the distal end of the first annular wall 11, and each of the three sections has different structures and functions. Specifically, a clamping section L1 having a first gap is formed between the outer wall surface of the first annular wall 11 and the inner wall surface of the large-diameter section 21 of the second annular wall. The size of the first gap is much smaller than the sum of the wall thicknesses of the two vascular stumps, so that the two vascular stumps located in the clamping section L1 are tightly compressed, thereby providing a compression force to prevent the two vascular stumps from separating from each other. For example, to precisely control the size of the first gap, a radially inwardly protruding annular platform can be provided on the inner wall surface of the second annular wall corresponding to the clamping section L1. For example, the size of the first gap can be set to be less than 1 / 2 of the sum of the wall thicknesses of the two vascular stumps, that is, the two vascular stumps are compressed to at least half of the total wall thickness in the clamping section L1.

[0042] A release section L2 with a second gap is formed between the outer wall surface of the first annular wall 11 and the inner wall surface of the large-diameter section 21 of the second annular wall. The size of the second gap is slightly smaller than the combined wall thickness of the two vascular stumps, so that the two vascular stumps in the release section L2 are gently compressed, thereby providing a compressive force that allows the two vascular stumps to grow together. Exemplarily, to ensure that the second gap is larger than the first gap, the annular platform on the inner wall surface of the second annular wall only axially overlaps the portion corresponding to the clamping section L1, while the annular platform is not provided in the portion corresponding to the release section L2. Exemplarily, the size of the second gap can be set to be smaller than the combined wall thickness of the two vascular stumps and larger than 1 / 5 of the combined wall thickness of the two vascular stumps, so that the two vascular stumps remain in contact with each other in the release section L2 while avoiding excessive compression of the two vascular stumps in the release section L2, causing necrosis.

[0043] A hooking section L3 is formed between the outer surface of the first annular wall 11 and the inner surface of the large-diameter section 21 of the second annular wall. This hooking section L3 comprises an annular ridge 14 that protrudes radially outward from the outer surface of the first annular wall 11. The slope angle of the annular ridge 14 on the side closest to the first base 13 is greater than the slope angle on the side away from the first base 13. Therefore, when the two blood vessel stumps are temporarily encased on the outer surface of the first annular wall 11, the annular ridge 14 provides axial resistance toward the first base 13, thereby preventing the two stumps from slipping axially away from the first base 13 and disengaging the male sleeve 10. The "slope angle" herein refers to the angle between the slope and the outer surface of the first annular wall, that is, the angle between the slope and the axial direction of the first annular wall. For example, the outer diameter of the annular ridge 14 can be set to be larger than the inner diameter of the two blood vessel stumps, thereby temporarily bracing the two stumps against the outer surface of the first annular wall 11.

[0044] Since the small diameter section 22 of the second annular wall is inserted into the annular groove, when the first annular wall 11 and the second annular wall jointly clamp the blood vessel stump in the clamping section L1, the blood vessel stump will also exert a radially outward reaction force on the second annular wall. The reaction force causes the second annular wall to deform radially outward. The deformation is beneficial to preventing the blood vessel stump from being over-clamped and causing necrosis, but excessive deformation will cause the clamping force to drop to a level that is insufficient to achieve anastomosis.

[0045] Therefore, on the one hand, the third annular wall 12 provides radial restraint for the small-diameter section 22 of the second annular wall within the annular groove, and on the other hand, an axially extending slot 24 is formed in the second annular wall. For example, the axial extension length of the slot 24 may cover only the clamping section L1 or may extend entirely to cover the small-diameter section 22.

[0046] When using the vascular sheathing and anastomosis device according to the embodiment of the present invention, the first vascular stump 01 is first passed through the male sleeve 10 and then put outside the outer wall surface of the first annular wall 11. The second vascular stump 02 is then passed through the female sleeve 20 and directly put outside the first vascular stump 01, so that the first vascular stump 01 and the second vascular stump 02 are temporarily tightened on the hook portion. Finally, the male sleeve 10 and the female sleeve 20 are pressed together so that the first annular wall 11 is inserted into the second annular wall, and the small diameter section 22 of the second annular wall is inserted into the annular groove, until the end of the large diameter section 21 of the second annular wall and the end of the third annular wall 12 are pressed against each other, thus completing the sheathing and anastomosis operation.

[0047] The tool of the embodiment of the present invention generally comprises a pair of clamping handles 31 and a pair of clamping arms 32. Figure 4 As shown, each clamping arm 32 is provided with a sliding groove, the middle part of each clamping handle 31 is pivotally connected to the corresponding clamping arm 32, the end of each clamping handle 31 is slidably connected to the sliding groove through a pin, and the pair of clamping handles 31 are also pivotally connected to each other, so that the process of closing and opening a pair of clamping handles 31 can drive the pair of clamping arms 32 to close and open.

[0048] In order to lock the pair of clamping handles 31 at any closing angle, the embodiment of the present invention provides a first locker between the pair of clamping handles 31. Figure 4-Figure 6 As shown, the first locking device includes an arc-shaped rack 341, a lock buckle 342 and an arc-shaped plate 344. The arc-shaped rack 341 is in the shape of an arc-shaped bar as a whole. One end of the arc-shaped rack 341 is pivotally connected to a clamping handle 31. In the pivoted state, the convex arc portion of the arc-shaped bar faces the tail of the clamping handle 31, and the concave arc portion faces the end of the clamping arm 32, and a tooth surface structure is formed at least on the convex arc portion.

[0049] The lock buckle 342 is pivotally connected to another clamping handle 31 different from the clamping handle 31 connected to the arc-shaped rack 341. An opening 346 is formed on the lock buckle 342. The size of the opening 346 is at least large enough to allow the arc-shaped rack 341 to pass freely therethrough. The larger the size of the opening 346, the greater the angle of rotation of the lock buckle 342 required to lock the arc-shaped rack 341.

[0050] The curved plate 344 is fixedly mounted on one clamping handle 31 via a long wall panel 345. The convex portion of the curved plate 344 faces the other clamping handle 31. A narrow slot is formed in the middle of the curved plate 344, allowing the curved rack 341 to pass through the slot without interfering with the curved plate 344 during pivoting. A protrusion 343 is also provided on the curved rack 341. The position of the protrusion 343 matches the convex portion of the curved plate 344, so that the convex portion of the curved plate 344 defines the maximum pivoting angle of the curved rack 341. At this maximum pivoting angle, when the pair of clamping handles 31 are closed, the curved rack 341 can smoothly pass through the opening 346 of the lock catch 342. By pivoting the lock catch 342, the edge of the opening 346 of the lock catch 342 and the tooth surface structure can be locked together, thereby stably locking the pair of clamping handles 31 at a closed angle.

[0051] In order to lock the pair of clamp arms 32 in the final sleeve-jointed state, the embodiment of the present invention provides a second locker at the tail end of the pair of clamp handles 31. Figure 4 and Figure 8 As shown, a single-piece locking piece 351 is provided at the tail of one clamping handle 31, and a double-piece locking piece 351 is provided at the tail of the other clamping handle 31. When the tool operates the male sleeve 10 and the female sleeve 20 to fit into place, the single-piece locking piece 351 can be inserted between the double-piece locking pieces 351, and then the pin is inserted to lock the pair of clamping handles 31 and the pair of clamping arms 32.

[0052] In order to position the male sleeve 10 and the female sleeve 20 in the circumferential, axial and radial directions simultaneously so as to align with each other, the embodiment of the present invention provides positioners 33 at the ends of a pair of clamping arms 32. Figure 7 and Figure 9 As shown, each positioner 33 includes a positioning seat 331, an axle seat 332 and a locking pin 333. The positioning seat 331 is formed with a pair of fork arms. The thickness of the first base 13 of the male sleeve 10 and the second base 23 of the female sleeve 20 is at least smaller than the distance between the pair of fork arms, so that the first base 13 and the second base 23 can be inserted between the pair of fork arms, and the pair of fork arms are used to provide axial positioning for the male sleeve 10 and the female sleeve 20.

[0053] A base plate is provided at the bottom of the pair of fork arms. This base plate has an angular profile that matches the outer contours of the first and second bases 13, 23, thereby providing circumferential positioning for the male and female sleeves 10, 20. For example, the outer contours of the first and second bases 13, 23 are hexagonal. An axle seat 332 is used to insert the end of the clamping arm 32. A beveled groove 334 is formed on the side of the axle seat 332. A locking pin 333 can be inserted into the beveled groove 334 from the outside of the clamping arm 32, thereby radially positioning the male and female sleeves 10, 20.

[0054] When using the tool of an embodiment of the present invention to perform a sleeve anastomosis, first install the male sleeve 10 and the female sleeve 20 on the positioning seat 331 of the positioner 33 through the first base 13 and the second base 23, close the pair of clamp arms 32 so that the male sleeve 10 and the female sleeve 20 are in slight contact, and at this time, the opening angle of the pair of clamp arms 32 is maintained by the first locking device and extended into the wound; then, the first blood vessel stump 01 and the second blood vessel stump 02 are sleeved on the male sleeve 10, unlock the first locking device and close the pair of clamp arms 32 until the male sleeve 10 and the female sleeve 20 are completely sleeved and anastomosed, and at this time, the pair of clamp arms 32 are locked in the anastomotic state by the second locking device.

[0055] The description of the embodiments herein and any references to directions and orientations are for ease of description only and are not to be construed as limiting the scope of the present invention. The description of the preferred embodiments may involve combinations of features, which may exist independently or in combination. The present invention is not specifically limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vascular anastomosis device, comprising a male sleeve and a female sleeve, wherein the male sleeve and the female sleeve are in an anastomotic state for clamping two vascular ends, characterized in that: The male sleeve includes a first base and a first annular wall, the first annular wall extends from the first base to the distal end; the female sleeve includes a second base and a second annular wall, the second annular wall extends from the second base to the distal end; The outer wall surface of the first annular wall and the inner wall surface of the second annular wall match each other so that in the described anastomosis state, the first annular wall can be inserted into the second annular wall, and an anastomosis surface for anastomosing the two blood vessel ends is formed between the outer wall surface of the first annular wall and the inner wall surface of the second annular wall, and the anastomosis surface is sequentially formed into a clamping section, a releasing section and a hooking section in the direction extending toward the distal end of the first annular wall, so that the two blood vessel ends can be clamped by the outer wall surface of the first annular wall and the inner wall surface of the second annular wall in the clamping section, can not be clamped by the outer wall surface of the first annular wall and the inner wall surface of the second annular wall in the releasing section, and can be tightened on the outer wall surface of the first annular wall in the hooking section; the outer wall surface of the first annular wall forms a radially outwardly protruding annular ridge at the hooking section, and the angle between the slope surface of the annular ridge close to the first base side and the outer wall of the first annular wall is larger than the angle between the slope surface away from the first base side and the outer wall of the first annular wall.

2. The vascular sheath anastomosis device according to claim 1, characterized in that: The male sleeve also includes a third annular wall, which extends from the first base to the distal end. The third annular wall is arranged on the outer periphery of the first annular wall and is radially spaced to form annular grooves, so that the distal end of the second annular wall can be inserted into the annular groove in the said fitting state, so that the third annular wall provides radial limitation to the second annular wall.

3. The vascular sheath anastomosis device according to claim 2, characterized in that: The third annular wall extends distally from the first base shorter than the first annular wall, so that in the engaged state, the annular groove and the portion of the first annular wall corresponding to the clamping section at least partially do not overlap in the axial direction.

4. The vascular sheath anastomosis device according to claim 2, characterized in that: The second annular wall is in the shape of a step along the axial direction, and the stepped second annular wall is provided with at least a small diameter section and a large diameter section, the large diameter section is located close to the second base side, and the small diameter section is located away from the second base side, wherein the axial size and radial size of the small diameter section match the annular groove so that the small diameter section can be inserted into the annular groove in the matching state, and the step portion of the large diameter section close to the small diameter section can be pressed against the end of the third annular wall.

5. The vascular sheath anastomosis device according to claim 1, characterized in that: The second annular wall is formed with an axially extending slot, and the axially extending length of the slot at least partially covers a portion of the second annular wall corresponding to the clamping section.

6. A tool for operating the vascular anastomosis device according to any one of claims 1 to 5 to perform vascular anastomosis, comprising a pair of clamping handles and a pair of clamping arms, each clamping handle being pivotally connected to one of the pair of clamping arms and being slidably connected to the other of the pair of clamping arms, characterized in that: A first locker is provided between the pair of clamping handles for locking the pair of clamping handles at any closing angle; a second locker is provided at the tail end of the pair of clamping handles for locking the pair of clamping handles at a final matching angle; and positioners are respectively provided at the ends of the pair of clamping arms for simultaneously positioning the male sleeve and the female sleeve in the circumferential, axial and radial directions, so that the male sleeve and the female sleeve are aligned with each other.

7. The tool according to claim 6, characterized in that The first locking device includes an arcuate rack and a lock buckle, one end of the arcuate rack is connected to one of a pair of clamp arms, and the lock buckle is pivoted to the other of the pair of clamp arms so as to be able to pivot between at least a first angle and a second angle, wherein the lock buckle is formed with an opening to accommodate the other end of the arcuate rack to pass through the opening during the closing process of the pair of clamp handles, and when the pair of clamp handles are at any closing angle, the lock buckle can pivot to the first angle, thereby utilizing the edge of the opening to lock with the tooth surface of the arcuate rack.

8. The tool according to claim 7, characterized in that One end of the arc-shaped rack is connected to one of the pair of clamp arms in a pivotal manner, so that the other end of the arc-shaped rack can pass through the opening when the pair of clamp arms are closed; and a protrusion is also provided at one end of the arc-shaped rack, and an arc-shaped plate is provided on the clamp arm. The protrusion matches the arc-shaped plate, so that the arc-shaped plate can support the arc-shaped rack in a locking position through the protrusion, thereby locking the opening edge of the lock buckle with the tooth surface of the arc-shaped rack.

9. The tool according to claim 6, characterized in that The locator includes a locating seat, a shaft seat and a locking pin. The fork arm of the locating seat matches the first base and the second base, thereby positioning the male sleeve and the female sleeve in the circumferential and axial directions at the same time; the shaft seat is used to insert the end of the clamping arm, and a bevel groove is formed on the side of the shaft seat. The locking pin can be inserted into the bevel groove from the outside of the clamping arm, thereby positioning the male sleeve and the female sleeve in the radial direction.

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