An artificial blood vessel reconstruction device for liver transplantation

Abstract

A liver transplant artificial blood vessel reconstruction device belongs to the field of medical devices. The existing liver venous reconstruction surgery involves anastomosis technology between liver blood vessels and artificial blood vessels that is not perfect. A liver transplant artificial blood vessel reconstruction device, the support member (1) as a support structure is located at the bottom of the whole mechanism, the rotating member (2) is installed on two support frames (1c) of the support member (1), and the sliding cutting member (3) is inserted into the rotating member (2). With the help of the liver transplant artificial blood vessel reconstruction device of the present invention, the positioning, opening and suturing operations of the artificial blood vessels can be completed quickly, which greatly improves the efficiency and accuracy, and avoids the risk of internal leakage. The artificial blood vessel suturing operation can be completed by a single person.

Description

Technical Field

[0001] The invention relates to an artificial blood vessel reconstruction device for liver transplantation. Background Art

[0002] Primary liver cancer is one of the most common malignant tumors in my country, and the incidence rate has been increasing in recent years. Large liver cancer belongs to the middle and late stage liver cancer. The tumor is huge, accompanied by venous invasion or tumor thrombosis, and is often combined with varying degrees of liver cirrhosis, so local surgical resection is very difficult. Compared with the whole liver cancer transplantation, the operation is difficult and the postoperative risk is high. The advantages of partial living liver transplantation include: short ischemia time, good tissue compatibility, and sufficient preparation. As one of the main types of liver donors for adult living liver transplantation, the reconstruction of the hepatic venous outflow tract is an unavoidable problem. The accuracy of hepatic venous reconstruction directly affects the surgical results. The hepatic venous outflow tract is mainly composed of the right hepatic vein, the branches of the middle hepatic vein, and several short hepatic veins of the second portal vein. In the process of hepatic vein reconstruction, artificial blood vessels, as the main reconstructed vascular material, have been verified in many clinical cases, and the postoperative effect is good. It is very important to perform virtual reconstruction of trunk veins and artificial blood vessel anastomosis before surgery. The final matching accuracy and simulation results directly affect the surgical effect. The existing liver blood vessel and artificial blood vessel anastomosis technology is not perfect. Therefore, the present invention designs a liver transplant artificial blood vessel reconstruction device, which can perform artificial blood vessel suture reconstruction according to the simulation results before surgery, including the main veins and their branches, thereby improving the accuracy of artificial blood vessel reconstruction, reducing the intraoperative repair operation time, and improving the overall surgical efficiency. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that the anastomosis technology between liver blood vessels and artificial blood vessels involved in the existing hepatic vein reconstruction surgery is not perfect, and to propose a liver transplant artificial blood vessel reconstruction device.

[0004] A liver transplant artificial blood vessel reconstruction device, which comprises a supporting member, a rotating member, and a sliding cutting member. The supporting member is located at the bottom of the whole mechanism as a supporting structure, the rotating member is installed on two supporting frames of the supporting member, and the sliding cutting member is inserted into the rotating member.

[0005] in,

[0006] The supporting member includes connecting bolts, a supporting end cover, an outer supporting cylinder, and an inner supporting cylinder;

[0007] The inner support tube is sleeved in the outer support tube, and a support end cover is installed at each end of the inner support tube and the outer support tube, and the two support end covers are respectively fixed to the two ends of the inner support tube and the outer support tube by 8 connecting bolts; a group of outer tube slide slot long holes are arranged along the circumferential direction on the tube wall of the outer support tube, and a group of inner tube slide slot long holes are arranged along the circumferential direction on the tube wall of the inner support tube, and the positions of the outer tube slide slot long holes and the inner tube slide slot long holes on the tube wall correspond to each other;

[0008] The sliding cutting component includes a guide rod frame, a positioning nut, a slide block, and a hole opening knife; the slide block and the positioning nut are both hollow structures, the slide block is provided with an external thread, the positioning nut is provided with an internal thread, and the two are connected to each other through threads; the guide rod frame passes through the positioning nut and the slide block, and the guide rod frame and the positioning nut and the slide block have clearance fit, and the guide rod frame can slide in the positioning nut and the slide block; after the guide rod frame passes through the positioning nut and the slide block, the front end of the guide rod frame is fixedly installed with the hole opening knife; the hole opening knife is cylindrical, and a group of arc-shaped blades are arranged on the end face of the hole opening knife.

[0009] The beneficial effects of the present invention are:

[0010] The cutter of the liver transplant artificial blood vessel reconstruction device of the present invention does not participate in any operation of the liver organ, but only targets the artificial blood vessel and makes a hole in the artificial blood vessel. The artificial blood vessel is placed on a support frame before the operation, and then the hole-making knife is used to make an opening in the artificial blood vessel.

[0011] A liver transplant artificial blood vessel reconstruction device of the present invention can locate and anastomose blood vessels according to the virtual reconstruction results, avoid manual measurement errors, ensure the anastomosis accuracy of the spatial position relationship of blood vessels, and improve surgical efficiency. The specially made triangular quick hole-making knife can be accurately positioned in the guide groove to quickly make holes in artificial blood vessels. Different from the traditional manual hole-making method using surgical scissors, this method has more accurate incision positions and neater incision edges, which is convenient for suturing branch blood vessels, thereby avoiding blood leakage. Pull out the hole-making knife, insert the branch blood vessel to the main blood vessel opening, and the liver transplant artificial blood vessel reconstruction device can be used as a clamp for suturing two blood vessels, supporting and fixing the two blood vessels that need to be sutured. Compared with traditional blood vessel suturing, which requires at least two people to cooperate to complete, one person can independently complete the positioning, registration, hole-making, and suturing work based on the liver transplant artificial blood vessel reconstruction device, and the instrument is simple to use.

[0012] The present invention adopts a sleeve structure in which an outer support tube cooperates with an inner support tube, the outer layer is a cylindrical outer support tube with a hollow groove and a scale, the positioning device can slide in the slot, the sliding cutting member can be locked and fixed on the outer support tube through the positioning nut thereon, and then a special triangular hole opening knife is used to open a hole in the artificial main vein. The sleeve structure in which the outer support tube cooperates with the inner support tube can be fixed on the support member and can rotate around the axis, the fixed bracket has a slide groove, and the slide groove block can slide along the slide groove direction.

[0013] The positioning nut on the sliding cutting member is a hollow screw structure with threads. The positioning nut is moved by rotation, and is fixed on the outer support tube to achieve precise positioning. A hole cutter can be inserted into the hollow positioning nut, and the opening of the artificial blood vessel can be achieved by twisting the hole cutter. The end of the special hole cutter is evenly arranged with three triangular arc blades, which are sharpened on both sides and can rotate in both directions to achieve the cutting and starting function of the artificial blood vessel. The pre-positioning device is used in conjunction with the opening operation at the specified position based on the guide rod frame.

[0014] After completing the main artificial vein opening, it is necessary to further suture the branch blood vessels. First, remove the external support tube and related sliding cutting components and other locking devices, leaving only the main vein artificial blood vessel and the internal stent. By adjusting the slide block on the stent, slide it to the branch vein opening, lock and fix it, the branch blood vessel and the main vein artificial blood vessel are fixed, and then artificial suturing can be performed. With the help of a liver transplant artificial blood vessel reconstruction device, the positioning, opening and suturing operations of the artificial blood vessels can be quickly completed, which greatly improves efficiency and accuracy, and avoids the risk of internal leakage. The artificial blood vessel suturing operation can be completed by one person. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a rear side view of the liver transplantation artificial blood vessel reconstruction device according to the present invention;

[0016] Figure 2 It is a front and side view of the liver transplantation artificial blood vessel reconstruction device according to the present invention;

[0017] Figure 3 It is a lower side view of the liver transplantation artificial blood vessel reconstruction device according to the present invention;

[0018] Figure 4 It is a front side view of the supporting member involved in the present invention;

[0019] Figure 5 It is a front side view of the supporting member involved in the present invention;

[0020] Figure 6 It is a front side view of the supporting member involved in the present invention;

[0021] Figure 7 An exploded view of a supporting member according to the present invention;

[0022] Figure 8 The supporting end cover of the present invention;

[0023] Fig. 9 The inner support cylinder involved in the present invention;

[0024] Fig.10 The outer support cylinder of the present invention;

[0025] Fig.11 It is an assembly relationship diagram of the outer support cylinder, the inner support cylinder and the single-side support end cover involved in the present invention;

[0026] Fig.12 The sliding cutting member according to the present invention;

[0027] Fig.13 An exploded view of a sliding cutting component according to the present invention;

[0028] Fig.14 The positioning nut of the present invention;

[0029] Fig.15 It is a front cross-sectional view of the chute block involved in the present invention;

[0030] Fig.16 for Fig.15 A cross-sectional view of

[0031] Fig.17 A side view of a chute block according to the present invention;

[0032] Fig.18 The guide rod frame of the present invention;

[0033] Fig.19 A cross-sectional view showing the matching relationship between the guide rod frame, the positioning nut and the slide block according to the present invention;

[0034] Fig. 20 The hole-opening knife involved in the present invention;

[0035] Fig.21 It is a placement diagram of the chute block involved in the present invention;

[0036] Fig. 22 It is a diagram showing the matching relationship between the rectangular guide block and the long hole of the outer cylinder slide groove according to the present invention;

[0037] Fig.23 It is a partial cross-sectional view of the rotating member and the sliding cutting member involved in the present invention;

[0038] Fig.24 This is a measurement cross-sectional view of the liver transplantation artificial blood vessel reconstruction device involved in the present invention. DETAILED DESCRIPTION Specific implementation method one:

[0040] A liver transplant artificial blood vessel reconstruction device according to this embodiment, such as Figure 1-24 As shown, it comprises a supporting member 1, a rotating member 2, and a sliding cutting member 3. The supporting member 1 is located at the bottom of the whole mechanism as a supporting structure, the rotating member 2 is installed on two supporting frames 1c of the supporting member 1, and the sliding cutting member 3 is inserted into the rotating member 2;

[0041] in,

[0042] The support member 2 includes a connecting bolt 2a, a support end cover 2b, an outer support tube 2c, and an inner support tube 2d;

[0043] The inner support tube 2d is sleeved in the outer support tube 2c, and a support end cover 2b is installed at each end of the inner support tube 2d and the outer support tube 2c, and the two support end covers 2b are respectively fixed to the two ends of the inner support tube 2d and the outer support tube 2c by 8 connecting bolts 2a; a group of outer tube slide groove long holes 2c2 are arranged along the circumferential direction on the tube wall of the outer support tube 2c, and a group of inner tube slide groove long holes 2d2 are arranged along the circumferential direction on the tube wall of the inner support tube 2d, and the positions of the outer tube slide groove long holes 2c2 and the inner tube slide groove long holes 2d2 on the tube wall correspond to each other;

[0044] The sliding cutting component 3 includes a guide rod frame 3a, a positioning nut 3b, a slide block 3c, and a hole opening knife 3d; and the slide block 3c and the positioning nut 3b are both hollow structures, the slide block 3c is provided with an external thread, and the positioning nut 3b is provided with an internal thread, and the two are connected to each other by threads; the guide rod frame 3a passes through the positioning nut 3b and the slide block 3c, and the guide rod frame 3a and the positioning nut 3b and the slide block 3c are clearance-matched, and the guide rod frame 3a can slide in the positioning nut 3b and the slide block 3c; after the guide rod frame 3a passes through the positioning nut 3b and the slide block 3c, the front end of the guide rod frame 3a is fixedly installed with the hole opening knife 3d; and the hole opening knife 3d is cylindrical, and a group of arc-shaped blades 3d1 are provided on the end face of the hole opening knife 3d, and the hole opening work of the artificial blood vessel is achieved by twisting the hole opening knife 3d. Specific implementation method 2:

[0046] Different from the first embodiment, the artificial blood vessel reconstruction device for liver transplantation in this embodiment is as follows: Figure 1-24 As shown, the support structure 1 also includes a machine foot 1a, a bottom fixing plate 1b, a support frame 1c, and a fastening bolt 1d;

[0047] Four machine feet 1a are fixed to the lower surface of the bottom fixing plate 1b, and a support frame 1c is fixed to the upper surface of the bottom fixing plate 1b; the support frame 1c is provided with support plates 1c1 on both sides, and fastening holes 1c2 and rotating holes 1c3 are provided on the support plates 1c1. The fastening holes 1c2 are provided with internal threads, and two fastening bolts 1d are respectively installed in the fastening holes 1c2 of the support plates 1c1 on both sides of the support frame 1c, and the fastening bolts 1d are connected to the fastening holes 1c2 through a threaded structure. Specific implementation method three:

[0049] Different from the first or second specific embodiments, the present embodiment is a liver transplantation artificial blood vessel reconstruction device, such as Figure 1-24 As shown, the support end cover 2b also includes a support shaft 2b1, a support sleeve 2b2, an end cover bolt hole 2b3, and an end cover fastening ring 2b4;

[0050] One side of the end cover fastening ring 2b4 is connected to the supporting shaft 2b1, and the other side of the end cover fastening ring 2b4 is connected to the supporting sleeve 2b2. Four end cover bolt holes 2b3 are evenly distributed at the circumferential position of the end of the supporting sleeve 2b2, and a threaded structure is provided in the end cover bolt hole 2b3.

[0051] The support end cover 2b is installed in the rotation hole 1c3 of the support frame 1c, and the support shaft 2b1 is clearance-matched with the rotation hole 1c3, so that the support end cover 2b can rotate circumferentially in the rotation hole 1c3 of the support frame 1c. Specific implementation method four:

[0053] Different from the third embodiment, the artificial blood vessel reconstruction device for liver transplantation in this embodiment is as follows: Figure 1-24 As shown, the inner support tube 2d is provided with four evenly distributed inner tube support holes 2d1 at the circumferential positions at both ends; the inner support tube 2d is provided with an inner tube slide slot long hole 2d2 at the middle part, and the four inner tube slide slot long holes 2d2 are evenly distributed circumferentially on the side wall of the inner support tube 2d;

[0054] The outer support tube 2c is provided with four evenly distributed outer tube support holes 2c1 at the circumferential positions at both ends; the outer support tube 2c is provided with an outer tube slide groove long hole 2c2 in the middle part, and the four outer tube slide groove long holes 2c2 are evenly distributed circumferentially; placement holes 2c3 are provided at both ends of the outer tube slide groove long hole 2c2, the placement holes 2c3 are connected with the outer tube slide groove long hole 2c2, and the diameter of the placement hole 2c3 is larger than the width of the outer tube slide groove long hole 2c2. Specific implementation method five:

[0056] Different from the first, second or fourth specific embodiments, the present embodiment is a liver transplantation artificial blood vessel reconstruction device, such as Figure 1-24As shown, the outer support tube 2c is provided with 4 evenly distributed outer tube support holes 2c1 at the circumferential positions at both ends, the inner support tube 2d is provided with 4 evenly distributed inner tube support holes 2d1 at the circumferential positions at both ends, and the support end cover 2b is provided with 4 evenly distributed end cover bolt holes 2b3 at the end circumferential position of the support sleeve 2b2; the outer support tube 2c is mounted on the outside of the support sleeve 2b2, the inner support tube 2d is mounted on the inside of the support sleeve 2b2, and then 8 connecting bolts 2a are respectively passed through the 8 outer tube support holes 2c1 and 2d1 at the two ends of the outer support tube 2c. The 8 end cover bolt holes 2b3 on the support end cover 2b and the 8 inner tube support holes 2d1 at both ends of the inner support tube 2d connect the support end cover 2b, the outer support tube 2c and the inner support tube 2d into a rigid whole, so that the various components included in the support member 2 can move and rotate together; in addition, after assembly is completed, the 4 outer tube slide groove long holes 2c2 on the outer support tube 2c and the 4 inner tube slide groove long holes 2d2 on the inner support tube 2d correspond exactly one to one in spatial position, thereby satisfying the fixation and use operation of the sliding cutting member 3 during subsequent use. Specific implementation method six:

[0058] Different from the fifth embodiment, the artificial blood vessel reconstruction device for liver transplantation in this embodiment is as follows: Figure 1-24 As shown, the positioning nut 3b is provided with a hollow threaded inner hole 3b2 structure, one end of the positioning nut 3b is provided with a nut block 3b1, the nut block 3b1 is connected with an extrusion positioning shaft 3b3, the slide block 3c is a hollow structure, one end of the slide block 3c is provided with a threaded shaft 3c1; one end of the rectangular guide block 3c2 is connected to the threaded shaft 3c1, and the other end of the rectangular guide block 3c2 is connected with an arc-shaped sliding block 3c3;

[0059] The rectangular guide block 3c2 is a rectangular structure, and has rounded corners at the four corners of the rectangular structure. The rectangular guide block 3c2 can be matched with the long hole 3c2 of the outer cylinder slide groove;

[0060] The arc-shaped sliding block 3c3 is placed between the inner support tube 2d and the outer support tube 2c. The upper and lower end surfaces of the arc-shaped sliding block 3c3 are arc-shaped so as to be closely fitted with the outer wall of the inner support tube 2d and the inner wall of the outer support tube 2c while maintaining clearance fit.

[0061] The guide rod frame 3a is composed of a guide rod handle 3a1, a sliding guide rod 3a2, and a clamping sleeve 3a3;

[0062] The front end of the sliding guide rod 3a2 is connected to a clamping sleeve 3a3, and the rear end of the sliding guide rod 3a2 is connected to a guide rod handle 3a1; the clamping sleeve 3a3 is a hollow structure, and is used to install and fix the hole cutter 3d; the outer diameter of the clamping sleeve 3a3 is smaller than the outer diameter of the sliding guide rod 3a2;

[0063] The threaded shaft 3c1 is connected to the threaded inner hole 3b2 through a threaded structure, and the sliding guide rod 3a2 is clearance-matched with the positioning nut 3b and the slide block 3c, so that the sliding guide rod 3a2 of the guide rod frame 3a can slide and rotate back and forth in the middle hole of the positioning nut 3b and the slide block 3c. Specific implementation method seven:

[0065] Different from the first, second, fourth or sixth specific embodiments, the present embodiment is a liver transplantation artificial blood vessel reconstruction device, such as Figure 1-24 As shown, the hole-opening knife 3d is composed of three triangular arc-shaped blades 3d1 at the front end and a clamping handle 3d2;

[0066] The triangular arc-shaped blade 3d1 is sharpened on both sides and can be used to cut artificial blood vessels; the clamping handle 3d2 can be inserted into the clamping sleeve 3a3 to achieve rigid fixation of the hole-punching knife 3d and the guide rod frame 3a, so that the hole-punching knife 3d can slide and rotate with the guide rod frame 3a.

[0067] Working principle:

[0068] A liver transplant artificial blood vessel reconstruction device, such as Figure 1-24 As shown, the artificial blood vessel reconstruction device for liver transplantation is first placed on a work surface, and the artificial blood vessel reconstruction device for liver transplantation is leveled by adjusting the four machine feet 1a located under the bottom fixing plate 1b.

[0069] The artificial blood vessel to be cut and opened can be placed on the work surface or the bottom fixing plate 1b according to the actual situation.

[0070] Put the slide block 3c into the placement hole 2c3 and slide it horizontally into the long hole 2c2 of the outer cylinder slide. The rectangular guide block 3c2 is clearance-matched with the long hole 2c2 of the outer cylinder slide. The upper surface of the arc sliding block 3c3 contacts the inner surface of the outer support cylinder 2c, and the lower surface of the arc sliding block 3c3 contacts the inner support cylinder 2d. The arc sliding block 3c3 is clearance-matched with the outer support cylinder 2c and the inner support cylinder 2d, so that the slide block 3c can slide back and forth in the long hole 2c2 of the outer cylinder slide. Then install the positioning nut 3b on the slide block 3c, and the two are connected by a threaded structure.

[0071] Put the slide block 3c into the placement hole 2c3 and slide it horizontally into the long hole 2c2 of the outer cylinder slide. The rectangular guide block 3c2 is clearance-matched with the long hole 2c2 of the outer cylinder slide. The upper surface of the arc sliding block 3c3 contacts the inner surface of the outer support cylinder 2c, and the lower surface of the arc sliding block 3c3 contacts the inner support cylinder 2d. The arc sliding block 3c3 is clearance-matched with the outer support cylinder 2c and the inner support cylinder 2d, so that the slide block 3c can slide back and forth in the long hole 2c2 of the outer cylinder slide. Then install the positioning nut 3b on the slide block 3c, and the two are connected by a threaded structure.

[0072] Adjust the slide block 3c to slide horizontally to a suitable position, use a wrench to rotate the nut block 3b1 to drive the positioning nut 3b to rotate, so that the positioning nut 3b and the slide block 3c are clamped and positioned on the outer support tube 2c, thereby realizing the positioning of the slide block 3c and the positioning nut 3b on the outer support tube 2c.

[0073] On the contrary, if the positioning nut 3b is reversed, the fixation of the positioning nut 3b and the slide block 3c on the outer support tube 2c can be released.

[0074] The outer support tube 2c may be provided with scales on the outer wall to mark the lateral position of the slide block 3c.

[0075] Adjust the rotating mechanism 2 so that the supporting shaft 2b1 rotates to a suitable position in the rotating hole 1c3, and then tighten the fastening bolt 1d in the fastening hole 1c2 so that the front end of the fastening bolt 1d presses against the end surface outside the end cover fastening ring 2b4, and use the friction force to adjust the rotation angle of the rotating mechanism 2, thereby fixing the rotation angle of the slide block 3c.

[0076] Conversely, if the fastening bolt 1d is loosened, the rotation angle of the rotating mechanism 2 can be released.

[0077] Insert the guide rod frame 3a into the hollow space of the slide block 3c and the positioning nut 3b. Since the slide block 3c and the positioning nut 3b are fixed on the outer support tube 2c, the guide rod frame 3a will pass through the long hole 2c2 of the outer tube slide and the long hole 2d2 of the inner tube slide. Select a hole punching knife 3d of appropriate size and install the hole punching knife 3d on the clamping sleeve 3a3 at the front end of the guide rod frame 3a.

[0078] When multiple holes need to be drilled, this can be achieved by adjusting the lateral position of the slide block 3c, the rotation angle of the rotating mechanism 2, and replacing the drilling knives 3d of different sizes.

[0079] After completing the required hole drilling, first remove the hole drilling knife 3d, then remove the guide rod frame 3a, and adjust it before next use.

[0080] The hole-making process is the reconstruction operation of the artificial blood vessel.

Claims

1. A liver transplant artificial blood vessel reconstruction device, characterized in that: The device comprises a supporting member (1), a rotating member (2), and a sliding cutting member (3); the supporting member (1) is located at the bottom of the entire mechanism as a supporting structure; the rotating member (2) is mounted on two supporting frames (1c) of the supporting member (1); and the sliding cutting member (3) is inserted into the rotating member (2); in, The support member (2) comprises a connecting bolt (2a), a support end cover (2b), an outer support tube (2c), and an inner support tube (2d); The inner support tube (2d) is sleeved in the outer support tube (2c), and a support end cover (2b) is installed at each end of the inner support tube (2d) and the outer support tube (2c), and the two support end covers (2b) are respectively fixed to the two ends of the inner support tube (2d) and the outer support tube (2c) through 8 connecting bolts (2a); a group of outer tube slide groove long holes (2c2) are arranged along the circumferential direction on the tube wall of the outer support tube (2c), and a group of inner tube slide groove long holes (2d2) are arranged along the circumferential direction on the tube wall of the inner support tube (2d), and the positions of the outer tube slide groove long holes (2c2) and the inner tube slide groove long holes (2d2) on the tube wall correspond to each other; The sliding cutting component (3) comprises a guide rod frame (3a), a positioning nut (3b), a slide block (3c), and a hole opening knife (3d); the slide block (3c) and the positioning nut (3b) are both hollow structures, the slide block (3c) is provided with an external thread, the positioning nut (3b) is provided with an internal thread, and the two are connected to each other through the thread; the guide rod frame (3a) passes through the positioning nut (3b) and the slide block (3c), the guide rod frame (3a) and the positioning nut (3b) and the slide block (3c) are clearance-matched, and the guide rod frame (3a) can slide in the positioning nut (3b) and the slide block (3c); after the guide rod frame (3a) passes through the positioning nut (3b) and the slide block (3c), the front end of the guide rod frame (3a) is fixedly mounted on the hole opening knife (3d); the hole opening knife (3d) is cylindrical, and a group of arc-shaped blades (3d1) are provided on the end surface of the hole opening knife (3d); The positioning nut (3b) is provided with a hollow threaded inner hole (3b2) structure; one end of the positioning nut (3b) is provided with a nut block (3b1); the nut block (3b1) is connected to an extruded positioning shaft (3b3); the slide block (3c) is a hollow structure; one end of the slide block (3c) is provided with a threaded shaft (3c1); one end of the rectangular guide block (3c2) is connected to the threaded shaft (3c1); the other end of the rectangular guide block (3c2) is connected to an arc-shaped sliding block (3c3); The rectangular guide block (3c2) is a rectangular structure, and has rounded corners at the four corners of the rectangular structure. The rectangular guide block (3c2) can be matched with the long hole (3c2) of the outer cylinder slide groove; The arc-shaped sliding block (3c3) is placed between the inner support tube (2d) and the outer support tube (2c); the upper and lower end surfaces of the arc-shaped sliding block (3c3) are arc-shaped so as to be closely fitted with the outer wall of the inner support tube (2d) and the inner wall of the outer support tube (2c) while maintaining a clearance fit; The guide rod frame (3a) is composed of a guide rod handle (3a1), a sliding guide rod (3a2), and a clamping sleeve (3a3); The front end of the sliding guide rod (3a2) is connected to a clamping sleeve (3a3), and the rear end of the sliding guide rod (3a2) is connected to a guide rod handle (3a1); the clamping sleeve (3a3) is a hollow structure and is used to install and fix the hole cutter (3d); the outer diameter of the clamping sleeve (3a3) is smaller than the outer diameter of the sliding guide rod (3a2); The threaded shaft (3c1) is connected to the threaded inner hole (3b2) through a threaded structure, and the sliding guide rod (3a2) is clearance-matched with the positioning nut (3b) and the slide block (3c), so that the sliding guide rod (3a2) of the guide rod frame (3a) can slide and rotate reciprocatingly in the center holes of the positioning nut (3b) and the slide block (3c).

2. The artificial blood vessel reconstruction device for liver transplantation according to claim 1, characterized in that: The supporting structure (1) further comprises a machine foot (1a), a bottom fixing plate (1b), a supporting frame (1c), and fastening bolts (1d); Four machine feet (1a) are fixed to the lower surface of the bottom fixing plate (1b), and a support frame (1c) is fixed to the upper surface of the bottom fixing plate (1b); the support frame (1c) is provided with support plates (1c1) on both sides, and a fastening hole (1c2) and a rotation hole (1c3) are provided on the support plate (1c1); an internal thread is provided in the fastening hole (1c2); two fastening bolts (1d) are respectively installed in the fastening holes (1c2) of the support plates (1c1) on both sides of the support frame (1c), and the fastening bolts (1d) are connected to the fastening holes (1c2) via a threaded structure.

3. The artificial blood vessel reconstruction device for liver transplantation according to claim 1 or 2, characterized in that: The supporting end cover (2b) further comprises a supporting shaft (2b1), a supporting sleeve (2b2), an end cover bolt hole (2b3), and an end cover fastening ring (2b4); One side of the end cover fastening ring (2b4) is connected to a supporting rotating shaft (2b1), and the other side of the end cover fastening ring (2b4) is connected to a supporting sleeve (2b2); four end cover bolt holes (2b3) are evenly distributed at circumferential positions at the end of the supporting sleeve (2b2); and a threaded structure is provided in the end cover bolt hole (2b3); The support end cover (2b) is installed in the rotation hole (1c3) of the support frame (1c), and the support rotation shaft (2b1) is clearance-matched with the rotation hole (1c3), so that the support end cover (2b) can rotate circumferentially in the rotation hole (1c3) of the support frame (1c).

4. The artificial blood vessel reconstruction device for liver transplantation according to claim 3, characterized in that: The inner support tube (2d) is provided with four evenly distributed inner tube support holes (2d1) at circumferential positions at both ends; the inner support tube (2d) is provided with an inner tube slide groove long hole (2d2) at the middle portion, and the four inner tube slide groove long holes (2d2) are evenly distributed circumferentially on the side wall of the inner support tube (2d); The outer support tube (2c) is provided with four evenly distributed outer tube support holes (2c1) at circumferential positions at both ends; the outer support tube (2c) is provided with an outer tube slide groove long hole (2c2) at the middle part, and the four outer tube slide groove long holes (2c2) are evenly distributed in the circumferential direction; placement holes (2c3) are provided at both ends of the outer tube slide groove long hole (2c2), the placement holes (2c3) are connected to the outer tube slide groove long hole (2c2), and the diameter of the placement holes (2c3) is greater than the width of the outer tube slide groove long hole (2c2).

5. The artificial blood vessel reconstruction device for liver transplantation according to claim 4, characterized in that: The outer support tube (2c) is provided with four evenly distributed outer tube support holes (2c1) at circumferential positions at both ends, the inner support tube (2d) is provided with four evenly distributed inner tube support holes (2d1) at circumferential positions at both ends, and the support end cover (2b) has four evenly distributed end cover bolt holes (2b3) at the circumferential positions at the end of the support sleeve (2b2); the outer support tube (2c) is sleeved on the outside of the support sleeve (2b2), the inner support tube (2d) is sleeved on the inside of the support sleeve (2b2), and then eight connecting bolts (2a) are respectively passed through the eight outer tube support holes (2c1) and the two inner tube support holes (2d1) at both ends of the outer support tube (2c); The eight end cover bolt holes (2b3) on the support end cover (2b) and the eight inner tube support holes (2d1) at both ends of the inner support tube (2d) connect the support end cover (2b), the outer support tube (2c) and the inner support tube (2d) into a rigid whole, so that the various components included in the support member (2) can move and rotate together; in addition, after assembly, the four outer tube slide groove long holes (2c2) on the outer support tube (2c) and the four inner tube slide groove long holes (2d2) on the inner support tube (2d) correspond exactly in spatial position, thereby satisfying the fixing and use operation of the sliding cutting member (3) during subsequent use.

6. The artificial blood vessel reconstruction device for liver transplantation according to claim 5, characterized in that: The hole-opening knife (3d) is composed of three triangular arc-shaped blades (3d1) located at the front end and a clamping handle (3d2); The triangular arc-shaped blade (3d1) is sharpened on both sides and can be used to cut artificial blood vessels; the clamping handle (3d2) can be sleeved in the clamping sleeve (3a3) to achieve rigid fixation of the hole-opening knife (3d) and the guide rod frame (3a), so that the hole-opening knife (3d) can slide and rotate together with the guide rod frame (3a).

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