A vascular anastomosis device

Abstract

The present invention provides a vascular anastomosis device, comprising: an anastomosis portion, with two clamping portions installed on the top; an anastomosis ring, one of which is detachably installed on each clamping portion; a fixing mechanism, which includes a driving assembly and a calibration column head, with a plurality of abutments evenly distributed circumferentially on the outer side of the calibration column head, and the driving assembly is used to drive all the abutments to rotate synchronously; and an adjustment mechanism, which is used to drive the calibration column head to move. The present invention utilizes the combined linkage between the driving assembly, the calibration column head and the abutments to quickly and simultaneously fix the blood vessel walls at various positions on the anastomosis ring, greatly improving the fixation efficiency of the blood vessel and the anastomosis ring, and the simultaneous eversion of each abutment can ensure that the degree of traction and eversion of the blood vessel wall at each position is the same, thereby improving the anastomosis effect of the blood vessel. The present invention can greatly shorten the operation time and improve the anastomosis precision between blood vessels, which is beneficial to the patient's postoperative recovery and improves the quality of surgery.

Description

Technical Field

[0001] The present invention relates to the field of vascular anastomosis instruments, and in particular to a vascular anastomosis instrument. Background Art

[0002] During major vascular anastomosis procedures such as liver, kidney, heart, and lung transplants, the most challenging and technically demanding step before transplantation is the repair and reconstruction of the donor and recipient's suprarenal arteries and veins. This process is crucial for surgical success and postoperative recovery. Shorter surgical times facilitate recovery after liver, kidney, heart, and lung transplants, maintaining systemic circulation as quickly as possible, reducing the incidence of complications, and facilitating the rapid regeneration of the graft.

[0003] Currently, vascular anastomosis is performed using an anastomotic ring. Each vessel stump is passed through its corresponding ring, and the intima of the stump is then turned inside out, allowing the vessel wall to be threaded onto the ring's needle for securement. Finally, the two rings are snapped together to complete the anastomosis. Compared to suturing with needle and thread, anastomotic rings provide a tighter connection between the two vessels, resulting in a better anastomosis.

[0004] However, when using an anastomotic ring to anastomose blood vessels, doctors still need to manually fix the vascular wall of the broken end of the blood vessel on the various needles of the anastomotic ring. This operation needs to be repeated many times. The operation is difficult and time-consuming. In addition, it is difficult for doctors to control the degree of traction and eversion of the blood vessel wall during each fixation, which can easily lead to inconsistent extension of the blood vessel wall at each fixed position, thereby resulting in poor vascular anastomosis effect. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention proposes a vascular anastomosis device to solve the problem that doctors still need to manually fix the broken ends of the blood vessels on the anastomosis ring, which requires repeated operations many times. The operation is difficult and time-consuming. In addition, it is difficult for doctors to control the degree of traction and eversion of the blood vessel wall during each fixation, which easily leads to inconsistent extension of the blood vessel wall at each fixed position, and thus leads to poor vascular anastomosis effect.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The present invention provides a vascular anastomosis device, comprising:

[0008] The anastomotic portion has two clamping portions installed on its top, and the anastomotic portion is used to drive the two clamping portions to move closer to or away from each other;

[0009] An anastomotic ring is detachably mounted on each of the clamping portions, and a plurality of needle bodies are evenly distributed circumferentially on one side of the two anastomotic rings facing each other, and a slot is provided between each adjacent needle body on the anastomotic ring;

[0010] A fixing mechanism comprising a drive assembly and a calibration stud, one end of the calibration stud being an end cap, the calibration stud being located between two anastomotic rings, a plurality of abutments being uniformly distributed circumferentially on the outer side of the calibration stud, the head end of each abutment being hinged to the calibration stud, the drive assembly being used to drive all abutments to rotate synchronously so that the ends of the abutments can move closer to or further away from the end cap; and

[0011] The positioning mechanism is used to drive the calibration column to move between the two anastomotic rings so that the end head can be aligned with the center of the two anastomotic rings and move toward the center.

[0012] Furthermore, a sliding groove is provided at the top of the mating part, and a driven rod capable of axial rotation is provided in the sliding groove. The surface of the driven rod has two symmetrically arranged and oppositely rotating threaded segments, and a first bevel gear is installed at the junction of the two threaded segments. The bottoms of the two clamping parts are respectively slidably installed in the sliding groove and are respectively transmission connected to the two threaded segments. An active rod capable of axial rotation is installed in the mating part, one end of the active rod passes through the bottom of the mating part and is provided with an mating knob, and the other end of the active rod passes through the top of the mating part and is provided with a second bevel gear, and the second bevel gear is transmission connected to the first bevel gear.

[0013] Furthermore, the clamping portion includes a supporting column and a U-shaped buckle. The supporting column can be slidably installed in the sliding groove and extend upward. The U-shaped buckle is installed on the top of the supporting column and extends out of one side of the anastomotic portion. The outer ring of the anastomotic ring is circumferentially provided with a clamping groove, and the anastomotic ring is clamped into the U-shaped buckle through the clamping groove.

[0014] Furthermore, the drive assembly includes an operating tube, a drive column and a drive head, the interior of the operating tube has a tubular cavity, the calibration column head is arranged on one side of the top end of the operating tube and the end faces outward, the interior of the calibration column head has a drive cavity connected to the tubular cavity, the calibration column head has a first side groove on the side wall corresponding to each abutment, each of the abutments is hinged to one end of the first side groove close to the end and is connected to the inner wall of the first side groove through a first elastic member, the first elastic member can provide an elastic force to push the end of the abutment toward the drive cavity, the drive head can be slidably installed in the drive cavity and the end is located in the tubular cavity, a plurality of abutments are evenly distributed circumferentially on the drive head corresponding to each abutment, each of the abutments is respectively located in the first side groove and abuts the abutment, the drive head is connected to the calibration column head through a second elastic member, the second elastic member can provide an elastic force to move the drive head toward the tubular cavity, the drive column can be slidably installed in the tubular cavity and the bottom end passes through the operating tube, the top of the drive column is inclined toward the side of the calibration column head and abuts the end of the drive head.

[0015] Furthermore, the number of the retaining pieces is the sum of the number of needle bodies and slots on an anastomotic ring, a notch is provided at the end of each retaining piece, and a fixing spike is provided on both sides of the notch on one side of each retaining piece close to the end.

[0016] Furthermore, the calibration column head is located on the side wall between the first side groove and the end head and has two second side grooves relatively provided thereon, and fixed columns can be slidably installed in the two second side grooves, and a third elastic member is connected between the two fixed columns, and the third elastic member can provide an elastic force to pull the two fixed columns toward the driving cavity, and a conical head is provided at one end of the driving head close to the end head, and the two side surfaces of the conical head respectively abut against the ends of the two fixed columns close to each other.

[0017] Furthermore, the positioning mechanism includes a main column and a rotating column, the main column is installed on one side of the anastomosis part where the U-shaped buckle is extended, and a rotating hole is provided in the main column that passes through the top and bottom thereof, and movable grooves are provided on both sides of the rotating hole close to the two U-shaped buckles, and the rotating column can be axially rotatably installed in the rotating hole, and a side accommodating groove is provided on one side of the rotating column, and the operating tube can be slidably installed in the side accommodating groove and pass through the main column at both ends. When the rotating column is rotated until the side accommodating groove is connected to a certain movable groove, the operating tube can move into the movable groove and move the calibration column head toward the anastomotic ring on that side.

[0018] Furthermore, push pins are respectively installed on one side of the two movable grooves away from each other, one end of each push pin is located inside the main column and is provided with a push plate, and the other end of each push pin is located outside the main column. The two push pins can slide in the direction of approaching or away from each other, and a push-in groove is provided on the side of the rotating column away from the side accommodating groove corresponding to the push plate.

[0019] Furthermore, a lower limit ring is provided at the bottom end of the operating tube and an upper limit ring is provided at the top end below the calibration column head. When the lower limit ring abuts against the rotating column, the calibration column head and the anastomotic ring are at the same height. When the upper limit ring abuts against the rotating column, the calibration column head is below the U-shaped buckle.

[0020] Furthermore, the top of the main column is provided with limit blocks on both sides of the rotating hole, and the top of the rotating column is provided with a support block. Rotating the rotating column can make the support block abut against the two limit blocks respectively, so that the end of the calibration column head is facing the two matching rings respectively.

[0021] It can be seen from the above technical solution that the present invention provides a vascular anastomosis device, which uses a transmission mechanism in the anastomotic part to control the two clamping parts to move closer and farther away from each other, and controls from the remote end, which is conducive to avoiding the connection operation of the anastomotic ring in a narrow surgical area, reducing the difficulty of connecting the anastomotic rings, and improving the anastomosis efficiency; using the combined linkage between the drive component, the calibration column head and the abutment plate, the blood vessel wall at each position can be quickly and simultaneously fixed on the anastomotic ring, which greatly improves the fixation efficiency of the blood vessel and the anastomotic ring, and the simultaneous outward rotation of each abutment plate can ensure that the degree of traction and outward rotation of each blood vessel wall is the same, thereby improving the anastomosis effect of the blood vessel; using the notch and the fixed thorn structure and the fixed column structure on the abutment plate, the blood vessel can be effectively fixed when the blood vessel wall is outward rotated, preventing the position of the blood vessel from shifting during the fixation process; the fixing of the blood vessel by the fixed column and the outward rotation of the blood vessel endothelium by the abutment plate are carried out simultaneously and in one step, thereby improving the surgical efficiency; using the adjustment mechanism to drive the calibration column head to exchange positions between the two anastomotic rings, further improving the surgical efficiency and the connection accuracy between the calibration column head and the anastomotic ring. The present invention can greatly shorten the operation time and improve the anastomosis precision between blood vessels, which is beneficial to the patient's postoperative recovery and improves the quality of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the specific embodiments. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of a vascular anastomosis device of the present invention;

[0024] Figure 2 A cross-sectional view of a schematic diagram of the main structure of an embodiment of a vascular anastomosis device of the present invention;

[0025] Figure 3 A cross-sectional view of a main structural schematic diagram of a main column in one embodiment of a vascular anastomosis device of the present invention;

[0026] Figure 4 Schematic diagram of the three-dimensional structure of a rotating column in one embodiment of a vascular anastomosis device of the present invention;

[0027] Figure 5 Schematic diagram of the three-dimensional structure of a fixing mechanism in one embodiment of a vascular anastomosis device of the present invention;

[0028] Figure 6 for Figure 5 A partial enlarged view of point A in the middle;

[0029] Figure 7is a cross-sectional view of a schematic diagram of the main structure of a fixing mechanism in one embodiment of a vascular anastomosis device of the present invention;

[0030] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0031] Figure 9 This is a schematic structural diagram of a fixing mechanism in one embodiment of a vascular anastomosis device of the present invention that fixes a blood vessel stump on a needle body of an anastomotic ring;

[0032] Figure 10 A cross-sectional view of a schematic diagram of the main structure of an anastomotic portion in one embodiment of a vascular anastomosis device according to the present invention;

[0033] Figure 11 Schematic diagram of the three-dimensional structure of an anastomotic ring in one embodiment of a vascular anastomosis device of the present invention;

[0034] Reference numerals:

[0035] Anastomotic portion 1, a clamping portion 11, a support column 111, a U-shaped buckle 112, a sliding groove 12, a driven rod 13, a first bevel gear 131, an active rod 14, anastomotic knob 141, and a second bevel gear 142;

[0036] Anastomotic ring 2, needle body 21, slot 22, retaining groove 23;

[0037] Fixing mechanism 3, driving assembly 31, operating tube 311, tube cavity 3111, upper limit ring 3112, lower limit ring 3113, driving column 312, driving head 313, stop column 3131, tapered head 3132, calibration column head 32, end head 321, first side groove 322, first elastic member 323, second elastic member 324, second side groove 325, fixing column 326, third elastic member 327, driving cavity 328, stop plate 33, notch 331, fixing spike 332;

[0038] Positioning mechanism 4, main column 41, rotating hole 411, moving slot 412, pushing column 413, pushing plate 4131, limiting block 414, rotating column 42, side accommodating slot 421, supporting block 422, pushing slot 423. DETAILED DESCRIPTION

[0039] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0042] like Figure 1-11 As shown, a vascular anastomosis device provided in this embodiment includes an anastomosis portion 1, an anastomosis ring 2, a fixing mechanism 3 and a positioning mechanism 4.

[0043] See also Figure 1 、 Figure 2 and Figure 10 Two clamping parts 11 are installed on the top of the anastomotic part 1. The clamping parts 11 are used to install the anastomotic ring 2. The anastomotic part 1 is used to drive the two clamping parts 11 to move closer to or away from each other.

[0044] It should be noted that, before the blood vessel stump is fixed on the anastomotic ring 2 , the two clamping portions 11 should be in a state of being away from each other.

[0045] like Figure 10 As shown, in one embodiment, a sliding groove 12 is formed at the top of the anastomotic portion 1, and a driven rod 13 is disposed transversely within the sliding groove 12, capable of axial rotation. The surface of the driven rod 13 has two symmetrically arranged threaded segments with opposite rotation directions, and a first bevel gear 131 is mounted at the junction of the two threaded segments. The bottoms of the two retaining portions 11 are slidably mounted within the sliding groove 12 and are respectively transmission-connected to the two threaded segments. Rotating the driven rod 13 can drive the two retaining portions 11 toward or away from each other. Furthermore, an active rod 14 is mounted within the anastomotic portion 1, capable of axial rotation. One end of the active rod 14 extends through the bottom of the anastomotic portion 1 and is provided with an anastomotic knob 141, which facilitates operation and rotation of the active rod 14 at the bottom of the anastomotic portion 1. The other end of the active rod 14 extends through the top of the anastomotic portion 1 and is provided with a second bevel gear 142. The second bevel gear 142 is located within the sliding groove 12 and is transmission-connected to the first bevel gear 131.

[0046] During specific use, the driven rod 13 can be driven to rotate by rotating the active rod 14, thereby driving the two clamping parts 11 to move closer to or away from each other, which is conducive to convenient control during surgery.

[0047] In one embodiment, the retaining portion 11 includes a support column 111 and a U-shaped buckle 112. The support column 111 is slidably mounted within the sliding groove 12 and extends upward. The support column 111 is used to elevate the U-shaped buckle 112, freeing up operating space for the fixing mechanism 3 and the positioning mechanism 4. The anastomotic ring 2 can be directly inserted into or removed from the groove of the U-shaped buckle 112, facilitating rapid installation and removal of the anastomotic ring 2. To further free up operating space for the fixing mechanism 3 and the positioning mechanism 4, the U-shaped buckle 112 is further mounted on top of the support column 111 and extends outward from one side of the anastomotic portion 1.

[0048] See also Figure 1 、 Figure 9 and Figure 11 The anastomotic ring 2 is used to connect two blood vessel ends by anastomosis. When used, the blood vessel ends need to pass through the inner ring of the anastomotic ring 2. An anastomotic ring 2 is detachably mounted on each clamping portion 11. Specifically, Figure 11 As shown, the outer circumference of the anastomotic ring 2 is provided with a retaining groove 23, and the anastomotic ring 2 can be retained in the groove of the U-shaped buckle 112 through the retaining groove 23. A plurality of needle bodies 21 are evenly distributed on the circumference of the two anastomotic rings 2 facing each other. The needle bodies 21 are used for both anastomosis of the blood vessel stumps and for fixing the blood vessel stumps. The fixation is completed by hanging the blood vessel wall of the blood vessel stump on each needle body 21. A slot 22 is provided between each adjacent needle body 21 on the anastomotic ring 2. The two anastomotic rings 2 are connected by inserting each needle body 21 into the slot 22. Therefore, when the two anastomotic rings 2 are installed on the U-shaped buckle 112, the needle bodies 21 of each other need to be aligned with the slot 22 of the other party.

[0049] In order to make the connection more secure after the needle body 21 is inserted into the slot 22, specifically, a plurality of oblique spines arranged along the length direction of the needle body 21 can be provided on the needle body 21, and the direction of the oblique spines is opposite to the insertion direction of the needle body 21. Accordingly, a blocking block is provided in the slot 22 to prevent the needle body 21 from retreating after being inserted into the slot 22.

[0050] See also Figure 1 、 Figure 2 as well as Figure 5-Figure 9 The fixing mechanism 3 includes a driving assembly 31 and a calibration column head 32.

[0051] The calibration stud 32 is used to align with the center of each anastomotic ring 2 and move toward the center. Therefore, the size of the calibration stud 32 should be smaller than the size of the inner ring of the anastomotic ring 2 so that it can enter the inner ring of the anastomotic ring 2. One end of the calibration stud 32 is an end cap 321, which serves as an entry end that moves toward the center of the anastomotic ring 2. Preferably, the end cap 321 is conical in shape to facilitate alignment and entry into the inner ring of the anastomotic ring 2. The calibration stud 32 is located between the two anastomotic rings 2. A plurality of flaps 33 are evenly distributed circumferentially on the outer side of the calibration stud 32. The head end of each flap 33 is hinged to the calibration stud 32. The flaps 33 are used to turn the endothelium of the blood vessel stump outside.

[0052] like Figure 6 As shown, preferably, the number of the blades 33 is equal to the sum of the number of needle bodies 21 and slots 22 on one anastomotic ring 2, which is conducive to ensuring that the needle bodies 21 on both anastomotic rings 2 can be aligned with the blades 33. A notch 331 is provided at the end of each blade 33. When the calibration column 32 moves toward the anastomotic ring 2 and the blades 33 are unfolded, each needle body 21 can pass through the corresponding notch 331. In order to prevent the blood vessel wall from sliding and shifting when the blades 33 are everted against the vascular intima, preferably, each blade 33 is provided with a fixing spike 332 on both sides of the notch 331 on one side near the end 321. When the blade 33 is everted and abuts against the inner wall of the blood vessel, the fixing spike 332 can temporarily puncture the blood vessel wall for temporary fixation. After the blood vessel wall is hung on the needle body 21, the fixation can be canceled by retracting the blade 33. Moreover, the puncture point is adjacent to the fixing point of the blood vessel wall, which will not affect the final anastomosis effect of the blood vessel.

[0053] The driving assembly 31 is used to drive all the retaining pieces 33 to rotate synchronously, so that the ends of the retaining pieces 33 can approach or move away from the end head 321 .

[0054] Specifically, such as Figure 7 and Figure 8 As shown, the drive assembly 31 includes an operating tube 311, a drive column 312, and a drive head 313. The operating tube 311 has a lumen 3111 within it. The calibration column head 32 is disposed at one end of the top of the operating tube 311, with the end 321 facing outward. The calibration column head 32 has a drive cavity 328 within it that communicates with the lumen 3111.

[0055] Furthermore, a first side groove 322 is formed on the sidewall of the calibration stud 32, corresponding to each abutment 33. The first side groove 322 connects the drive cavity 328 to the outside world. Each abutment 33 is hingedly connected to the first side groove 322 at one end near the end 321 and connected to the inner wall of the first side groove 322 via a first elastic member 323. The first elastic member 323 provides an elastic force that pushes the distal end of the abutment 33 toward the drive cavity 328. The drive head 313 is slidably mounted within the drive cavity 328, with its distal end positioned within the lumen 3111. Multiple abutment posts 3131 are uniformly distributed around the drive head 313, corresponding to each abutment 33. Each abutment post 3131 is positioned within the first side groove 322, with its distal end abutting the abutment 33. The drive head 313 is connected to the calibration stud 32 via a second elastic member 324, which provides an elastic force that moves the drive head 313 toward the lumen 3111. Preferably, in order to make the driving head 313 slide more smoothly, a plurality of second elastic members 324 are provided, and are respectively installed between each support column 3131 and the inner wall of the first side groove 322 .

[0056] The drive post 312 is slidably mounted within the lumen 3111, with its bottom end protruding from the operating tube 311. The top end of the drive post 312, facing the calibration column head 32, is inclined and abuts against the end of the drive head 313. Preferably, the end of the drive head 313, which is closest to the drive post 312, is rounded to facilitate inward movement of the drive post 312. The top end of the operating tube 311 is sealed to prevent the top end of the drive post 312 from protruding.

[0057] During use, the driving post 312 is squeezed inward to drive the driving head 313 into the driving cavity 328, thereby pushing the flap 33 to evert the blood vessel intima through the respective flaps 3131. After the blood vessel is threaded onto the needle body 21, the driving post 312 is pulled outward, and the driving head 313 slides toward the lumen 3111 under the elastic force of the second elastic member 324. The flap 33 is constantly in contact with the flaps 3131 and retracted under the elastic force of the first elastic member 323.

[0058] A pull-out tab may be provided at the bottom end of the driving column 312 to facilitate squeezing the driving column 312 inward or pulling it outward.

[0059] like Figure 7-Figure 9 As shown, in one embodiment, the calibration column head 32 has two second side grooves 325 disposed opposite each other on the side wall between the first side groove 322 and the end head 321. A fixing column 326 is slidably mounted in each of the second side grooves 325. A third elastic member 327 is connected between the two fixing columns 326. The third elastic member 327 can provide an elastic force to pull the two fixing columns 326 toward the drive cavity 328. A conical head 3132 is disposed at one end of the drive head 313 near the end head 321. The two side surfaces of the conical head 3132 respectively abut against the ends of the two fixing columns 326 that are close to each other.

[0060] When the drive head 313 moves into the drive cavity 328, it drives the conical head 3132 from between the two fixing posts 326, pushing them apart. The two fixing posts 326 are forced to slide outward. During use, the calibration post 32 is moved so that the outer ends of the fixing posts 326 are within the inner ring of the anastomotic ring 2. Then, the drive post 312 is pressed inward to secure the blood vessel wall between the fixing posts 326 and the inner wall of the anastomotic ring 2. This prevents the entire vessel from shifting when the flap 33 everts the intima, potentially leading to a failed fixation. Pulling out the drive post 312 immediately releases the fixation.

[0061] The first elastic member 323 , the second elastic member 324 and the third elastic member 327 may all be springs.

[0062] See also Figure 1-Figure 5 The positioning mechanism 4 is used to drive the calibration column head 32 to move between the two anastomotic rings 2 so that the end head 321 can be aligned with the center of the two anastomotic rings 2 and move toward the center.

[0063] In one embodiment, the positioning mechanism 4 includes a main column 41 and a rotating column 42. The main column 41 is mounted on the side of the anastomotic portion 1 where the U-shaped buckle 112 extends. A rotating hole 411 is provided in the main column 41, extending through the top and bottom thereof. A movable groove 412 is provided on either side of the rotating hole 411, adjacent to the two U-shaped buckles 112. The rotating column 42 is axially rotatably mounted in the rotating hole 411. Specifically, a rotating ring is circumferentially provided on the rotating column 42, and a rotating groove adapted to the rotating ring is provided in the rotating hole 411. Preferably, the bottom end of the rotating column 42 extends outside the rotating hole 411 and is circumferentially provided with an anti-slip ring to facilitate rotation of the rotating column 42 during surgery. A side receiving groove 421 is defined on one side of the rotating column 42. The operating tube 311 is slidably mounted within the side receiving groove 421, with both ends extending through the main column 41. When the operating tube 311 is positioned in the side receiving groove 421, the end 321 of the calibration column head 32 faces the side opening of the side receiving groove 421. Preferably, a pull tab can be provided at the bottom end of the operating tube 311 to facilitate sliding the operating tube 311 via the pull tab.

[0064] When the rotating post 42 rotates until the side receiving groove 421 is connected to a certain movable groove 412, the operating tube 311 can move into the movable groove 412, and the calibration column head 32 moves toward the anastomotic ring 2 on that side. It should be noted that when the operating tube 311 moves into the movable groove 412, the fixed post 326 of the calibration column head 32 will be within the inner circle of the anastomotic ring 2.

[0065] Preferably, the outer wall of the operating tube 311 is square, and the inner walls of the side receiving groove 421 and the moving groove 412 can fit tightly with the outer wall of the operating tube 311, which helps to prevent the operating tube 311 from deflecting when moving.

[0066] In one embodiment, a push column 413 is installed through each side of the two movable grooves 412 away from each other, one end of each push column 413 is located inside the main column 41 and is provided with a push plate 4131, and the other end of each push column 413 is located outside the main column 41. The two push columns 413 can slide in a direction close to or away from each other, and a push-in groove 423 is provided on the side of the rotating column 42 away from the side accommodating groove 421 corresponding to the push plate 4131.

[0067] During use, the rotating column 42 is rotated to align the side receiving groove 421 with any movable groove 412 , and the operating tube 311 can be moved between the side receiving groove 421 and the movable groove 412 by pushing the two pushing columns 413 .

[0068] In one embodiment, a lower limit ring 3113 is provided at the bottom end of the operating tube 311 and an upper limit ring 3112 is provided at the top end below the calibration column 32. When the lower limit ring 3113 abuts against the rotating column 42, the calibration column 32 and the anastomotic ring 2 are at the same height. When the upper limit ring 3112 abuts against the rotating column 42, the calibration column 32 is below the U-shaped buckle 112.

[0069] Preferably, the top of the main column 41 is provided with limit blocks 414 on both sides of the rotating hole 411, and the top of the rotating column 42 is provided with a support block 422. Rotating the rotating column 42 can cause the support blocks 422 to abut against the two limit blocks 414, so that the end 321 of the calibration column head 32 is directed toward the two anastomotic rings 2. This facilitates the rapid alignment of the side receiving groove 421 with the movable groove 412.

[0070] When the anastomosis ring 2 is in operation, the doctor holds the anastomosis part 1 or the main column 41 and places the device at the surgical position. The doctor slides the operating tube 311 to make the lower limit ring 3113 abut against the rotating column 42, so as to move the calibration column head 32 to a position at the same height as the anastomosis ring 2; the broken end of a blood vessel passes through the inner ring of one of the anastomosis rings 2, and the rotating column 42 is rotated to make the side receiving groove 421 abut against the movable groove 412 on that side; the pushing column 413 on the side away from the calibration column head 32 is pressed to move the operating tube 311 into the movable groove 412, so that the calibration column head 32 moves toward the anastomosis ring 2 and penetrates into the blood vessel; the driving column 312 is pushed inward to push the driving head 313 to move into the driving cavity 328, and then push the fixing column 326 to squeeze and fix the blood vessel wall of the inner ring of the anastomosis ring 2. At the same time, the supporting column 3131 pushes the supporting piece 33 to turn outward. The supporting piece 33 presses against the outward-turned blood vessel intima and is fixed on the blood vessel wall. When the suture 35 is in the closed position, the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture 35 is in the closed position, and the suture

[0071] The present invention utilizes the transmission mechanism in the anastomotic part 1 to control the two clamping parts 11 to move closer to and farther from each other, and controls it from the remote end, which is beneficial to avoid the connection operation of the anastomotic ring 2 in a narrow surgical area, reduces the connection difficulty between the anastomotic rings 2, and improves the anastomotic efficiency; by utilizing the combined linkage between the driving component 31, the calibration column head 32 and the retaining piece 33, the blood vessel wall at each position can be fixed on the anastomotic ring 2 quickly and simultaneously, which greatly improves the fixing efficiency of the blood vessel and the anastomotic ring 2, and the simultaneous eversion of each retaining piece 33 can ensure the pulling and eversion of each blood vessel wall The degree of the anastomosis is the same, which improves the anastomosis effect of the blood vessels; the notch 331 and the fixing thorn 332 structure on the abutment 33 and the fixing column 326 structure can effectively fix the blood vessel when the blood vessel wall is everted, preventing the position of the blood vessel from shifting during the fixation process; the fixing column 326 fixes the blood vessel and the abutment 33 everts the blood vessel endothelium simultaneously and in one step, thereby improving the efficiency of the operation; the adjustment mechanism 4 drives the calibration column head 32 to exchange positions between the two anastomotic rings 2, further improving the efficiency of the operation and the connection accuracy between the calibration column head 32 and the anastomotic ring 2. The present invention can greatly shorten the operation time and improve the anastomosis precision between blood vessels, which is beneficial to the patient's postoperative recovery and improves the quality of the operation.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A vascular anastomosis device, characterized in that: include: The anastomotic portion has two clamping portions mounted on its top, and the anastomotic portion is used to drive the two clamping portions to move closer to or away from each other; An anastomotic ring is detachably mounted on each of the clamping portions, and a plurality of needle bodies are evenly distributed circumferentially on one side of the two anastomotic rings facing each other, and a slot is provided between each adjacent needle body on the anastomotic ring; A fixing mechanism comprising a drive assembly and a calibration stud, one end of the calibration stud being an end cap, the calibration stud being located between two anastomotic rings, a plurality of abutments being uniformly distributed circumferentially on the outer side of the calibration stud, the head end of each abutment being hinged to the calibration stud, the drive assembly being used to drive all abutments to rotate synchronously so that the ends of the abutments can move closer to or further away from the end cap; and A positioning mechanism is used to drive the calibration column to move between the two anastomotic rings so that the end can be aligned with the center of the two anastomotic rings and move toward the center. The top of the anastomotic part is provided with a sliding groove, and a driven rod capable of axial rotation is provided in the sliding groove. The surface of the driven rod has two symmetrically arranged and oppositely rotating threaded sections, and a first bevel gear is installed at the junction of the two threaded sections. The bottoms of the two clamping parts are respectively slidably installed in the sliding groove and are respectively transmission connected with the two threaded sections. An active rod capable of axial rotation is installed in the anastomotic part, one end of the active rod passes through the bottom of the anastomotic part and is provided with an anastomotic knob, and the other end of the active rod passes through the top of the anastomotic part and is provided with a second bevel gear, and the second bevel gear is transmission connected with the first bevel gear. The cam is secured to the upper edge of the cam and is secured to the lower edge of the cam, wherein the cam is secured to the lower edge of the cam, wherein the cam is secured to the lower edge of the cam. The number of the said pieces is the sum of the number of the needle bodies and the slots on one anastomotic ring. The end of each said piece is provided with a notch, and each said piece is provided with fixed thorns at positions on both sides of the notch on one side close to the end. The calibration column head is located on the side wall between the first side groove and the end head and has two second side grooves relatively arranged thereon. Fixed columns can be slidably installed in the two second side grooves. A third elastic member is connected between the two fixed columns. The third elastic member can provide an elastic force to pull the two fixed columns toward the driving cavity. A conical head is provided at one end of the driving head close to the end head, and the two side surfaces of the conical head respectively abut against one end of the two fixed columns close to each other.

2. A vascular anastomosis device according to claim 1, characterized in that: The clamping portion includes a supporting column and a U-shaped buckle. The supporting column can be slidably installed in the sliding groove and extend upward. The U-shaped buckle is installed on the top of the supporting column and extends to one side of the anastomotic portion. The outer ring of the anastomotic ring is circumferentially provided with a clamping groove, and the anastomotic ring is clamped into the U-shaped buckle through the clamping groove.

3. A vascular anastomosis device according to claim 2, characterized in that: The positioning mechanism includes a main column and a rotating column. The main column is installed on one side of the anastomosis part where the U-shaped buckle is extended. A rotating hole is provided in the main column, which passes through the top and bottom of the main column. The rotating hole is provided with movable grooves on both sides close to the two U-shaped buckles. The rotating column can be axially rotatably installed in the rotating hole. A side accommodating groove is provided on one side of the rotating column. The operating tube can be slidably installed in the side accommodating groove and pass through the main column at both ends. When the rotating column is rotated until the side accommodating groove is connected to a certain movable groove, the operating tube can move into the movable groove and move the calibration column head toward the anastomotic ring on that side.

4. A vascular anastomosis device according to claim 3, characterized in that: A push column is installed on each side of the two movable grooves away from each other, one end of each push column is located in the main column and is provided with a push plate, and the other end of each push column is located outside the main column. The two push columns can slide in the direction of approaching or away from each other, and a push-in groove is provided on the push plate corresponding to the side of the rotating column away from the side accommodating groove.

5. The vascular anastomosis device according to claim 3, characterized in that: The bottom end of the operating tube is provided with a lower limit ring and the top end is provided with an upper limit ring at a position below the calibration column head. When the lower limit ring abuts against the rotating column, the calibration column head and the anastomotic ring are at the same height. When the upper limit ring abuts against the rotating column, the calibration column head is below the U-shaped buckle.

6. The vascular anastomosis device according to claim 5, characterized in that: The top of the main column is located on both sides of the rotating hole and a limit block is set respectively. The top of the rotating column is provided with a support block. Rotating the rotating column can make the support block abut against the two limit blocks respectively, so that the end of the calibration column head is respectively facing the two anastomotic rings.

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