An arm arteriovenous anastomosis auxiliary device

Abstract

The application discloses an arm arteriovenous anastomosis auxiliary device and relates to the technical field of medical devices. The arm arteriovenous anastomosis auxiliary device comprises a chassis, a sliding groove arranged in the chassis and a sliding plate slidably connected to the sliding groove, a limiting mechanism arranged in the chassis, a positioning mechanism arranged above the sliding plate, the positioning mechanism comprising a first disc and a second disc arranged above the sliding plate, a second sliding rod slidably connected to the first disc and the second disc and a contact piece arranged on the second sliding rod, and the second sliding rod is used for driving the contact piece to deflect. The limiting mechanism comprises a through groove arranged in the chassis, the through groove penetrating through the chassis, a telescopic column mounted on the outside of the chassis and a first connecting rod connected with the telescopic column, a telescopic rod mounted on the outside of the first connecting rod and a second connecting rod and a clamping rod connected with the telescopic end of the telescopic rod. The arm arteriovenous anastomosis auxiliary device achieves the purpose of improving the use efficiency of the device.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an arteriovenous anastomosis assistive device for the arm. Background Technology

[0002] Vascular anastomoses are vascular structures that directly connect arteries to arteries, veins to veins, or arteriovenous vessels. Based on the connection method, they can be divided into three categories: inter-arterial anastomoses, inter-venous anastomoses, and arteriovenous anastomoses. Inter-arterial anastomoses connect through perforating branches, arterial networks, or arterial arches, shortening circulation time and regulating blood flow. Inter-venous anastomoses often form venous plexuses or venous networks.

[0003] A utility model patent with publication number CN210811278U discloses an arm arteriovenous anastomosis aid, which can place the patient's veins and arteries deep in the arm on the same horizontal plane, facilitating the surgeon to perform arteriovenous anastomosis and allowing the dissected arteries and veins to be elevated. However, because the position of the arm-supporting rod is fixed, it is difficult to adapt to different arm thicknesses and to fit the arm curve. Summary of the Invention

[0004] To overcome the problem that the fixed position of the arm support rod makes it difficult to adapt to different arm sizes and to fit the arm curve, this invention provides an arm arteriovenous anastomosis assistive device, including a base frame, and further comprising:

[0005] A slide groove inside the base frame and a slide plate that is slidably connected inside the slide groove;

[0006] A limiting mechanism is installed inside the base frame;

[0007] The positioning mechanism is located above the skateboard. The positioning mechanism includes a first disk and a second disk located above the skateboard, a second slide rod slidably connected inside the first disk and the second disk, and a contact member located on the second slide rod. The second slide rod is used to drive the contact member to deflect. By adjusting the angle of the second slide rod, the angle of the contact member that contacts the patient's arm and the angle of the second slide rod can be adjusted.

[0008] Preferably, the limiting mechanism includes:

[0009] A through slot is formed inside the base frame, and the through slot penetrates the base frame;

[0010] Telescopic columns installed on the outside of the base frame and the first connecting rod connected to the telescopic columns;

[0011] A telescopic rod is installed outside the first link, and a second link and a locking rod are connected to the telescopic end of the telescopic rod. The locking rod is adapted to the through groove and is used to lock the slide plate, thereby limiting the position of the slide plate.

[0012] Preferably, the limiting mechanism further includes:

[0013] The first and second recesses are formed inside the base frame;

[0014] A movable plate that is slidably connected inside the first groove;

[0015] The connecting rod and the pressure rod connected to the connecting rod are mounted on the movable plate.

[0016] Preferably, the limiting mechanism further includes:

[0017] A spring is disposed inside the first groove, and the spring is connected to the movable plate;

[0018] The first slide bar is located below the movable plate and is slidably connected to the inside of the base frame;

[0019] The chassis is installed at the end of the first slide bar furthest from the moving plate.

[0020] Preferably, the positioning mechanism further includes:

[0021] An adjustment column is installed above the skateboard. There are two adjustment columns for both the skateboard and the adjustment column. One adjustment column is connected to the first disc, and the other adjustment column is connected to the second disc.

[0022] A first through hole is formed inside the first and second discs, and a pin is used to lock the second slide rod through the first through hole.

[0023] Preferably, the positioning mechanism further includes:

[0024] The first adjusting rod is installed on the outside of the second disk;

[0025] The mounting component is located at the end of the first adjusting rod away from the second disk.

[0026] Preferably, the positioning mechanism further includes:

[0027] A third slide bar is disposed outside the first disk, and an outer ring is connected to the end of the third slide bar away from the first disk. The outer ring is used to define the position of the third slide bar.

[0028] The connecting cylinder is located outside the second disk, and the third slide rod is slidably connected to the inside of the connecting cylinder.

[0029] Preferably, the mounting component includes:

[0030] A movable ring is located at the end of the first adjusting rod furthest from the second disk;

[0031] The second adjusting rod is installed above the moving ring, and the receiving plate is connected to the second adjusting rod.

[0032] Preferably, the mounting component further includes:

[0033] The first push rod and the connecting rod connected to the first push rod are set on both sides of the receiving plate;

[0034] The mounting bracket and the mounting element that engage with the mounting bracket are installed on the outside of the connecting rod. The mounting element and the connecting rod are used to support the artery and vein to be anastomosed and to elevate the artery and vein to be at approximately the same height.

[0035] This invention provides an assistive device for arteriovenous anastomosis in the arm. It has the following beneficial effects:

[0036] 1. This arm arteriovenous anastomosis assistive device, through the setting of a positioning mechanism, adjusts the angle of the contact element that contacts the patient's arm and the angle of the second slide rod. Existing arm arteriovenous anastomosis assistive devices, due to the fixed position of the arm-supporting rod, are difficult to adapt to different arm thicknesses or to fit the arm curve. Therefore, a second slide rod that can slide within a first or second disc is provided. By adjusting the angle of the second slide rod, the angle of the contact element that contacts the patient's arm and the angle of the second slide rod are adjusted, thereby solving the aforementioned problems.

[0037] 2. This arm arteriovenous anastomosis assistive device, through the setting of a limiting mechanism, uses the combined action of a pressure rod, spring, moving plate, and base plate suction strip to evenly and stably fix the base frame on the worktable. The surgeon only needs to manually press down the pressure rod to drive the first sliding rod and base plate downward, so that the suction strip is tightly adhered to the worktable surface. Furthermore, because there are multiple sets of base plates and suction strips, with multiple sets of base plates and suction strips located on both sides of the bottom of the base frame, reliable limiting of the base frame is achieved, effectively preventing the base frame from moving during the operation.

[0038] 3. This arm arteriovenous anastomosis assistive device, through the setting of a limiting mechanism, uses a telescopic column, a first connecting rod, a second connecting rod, and a locking rod to limit the sliding plate. The surgeon can pull the first connecting rod outward to disengage the locking rod from the slot of the sliding plate and the through slot of the base frame, thus freely adjusting the position of the sliding plate to a suitable position for the patient's arm support distance. Once the sliding plate position is determined, pushing the first connecting rod causes the locking rod to pass through the through slot and the slot in sequence, thereby locking the sliding plate. By setting a rubber limiting strip in the sliding groove, moderate damping is provided during the movement of the sliding plate, facilitating the sliding plate to stay within a limited range and simplifying the positioning and limiting of the sliding plate.

[0039] 4. This arm arteriovenous anastomosis assistive device, through the configuration of a mounting component, in conjunction with a moving ring, a receiving plate, an elastic plate, a first push rod, connecting rods, and replaceable mounting components, achieves the support and elevation of the dissected artery and vein. After the patient's arm is placed on the two sets of contact components, the middle area of ​​the arm naturally presses down on the elastic plate above the receiving plate. The elastic plate undergoes adaptive deformation to conform to the curvature of the arm surface, which not only improves patient comfort but also provides a stable base support for vascular mounting. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0042] Figure 3 This is a schematic diagram of the limiting mechanism of the present invention;

[0043] Figure 4 This is a schematic diagram of the limiting mechanism of the present invention from another perspective;

[0044] Figure 5 This is a cross-sectional view of the limiting mechanism of the present invention;

[0045] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at point A;

[0046] Figure 7 This is a schematic diagram of the positioning mechanism of the present invention;

[0047] Figure 8 This is a cross-sectional view of the positioning mechanism of the present invention;

[0048] Figure 9 This is a schematic diagram of the structure of the component mounted in this invention.

[0049] In the diagram: 1. Base frame; 2. Slide groove; 3. Limiting mechanism; 301. Through groove; 302. Telescopic column; 303. First connecting rod; 304. Telescopic rod; 305. Second connecting rod; 306. Locking rod; 307. First groove; 308. Chassis; 309. Moving plate; 310. Spring; 311. Connecting rod; 312. Pressure rod; 313. First sliding rod; 314. Second groove; 4. Slide plate; 5. Positioning mechanism; 501. Adjusting column; 502, First disc; 503, Second slide rod; 504, Contact element; 505, First through hole; 506, Third slide rod; 507, Second disc; 508, First adjusting rod; 509, Mounting assembly; 5091, Moving ring; 5092, Second adjusting rod; 5093, Support plate; 5094, First push rod; 5095, Connecting rod; 5096, Card seat; 5097, Mounting element; 510, Connecting cylinder; 511, Outer ring. Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0051] like Figures 1-9 As shown, the present invention provides a technical solution: an arm arteriovenous anastomosis assist device, which is described below.

[0052] Including the base frame 1, it also includes:

[0053] The slide 2 is formed inside the base frame 1 and the slide plate 4 is slidably connected inside the slide 2. The slide 2 is provided with a limit strip, which is made of rubber. The slide plate 4 is provided with a slot.

[0054] The limiting mechanism 3 is installed inside the base frame 1;

[0055] The positioning mechanism 5 is located above the slide plate 4. The positioning mechanism 5 includes a first disk 502 and a second disk 507 located above the slide plate 4, a second slide rod 503 slidably connected inside the first disk 502 and the second disk 507, and a contact member 504 located on the second slide rod 503. The contact member 504 is a soft pad, and a support rod is provided in the soft pad. The second slide rod 503 is used to drive the contact member 504 to deflect. A second through hole is provided inside the second slide rod 503.

[0056] Before using the equipment, adjust the limiting mechanism 3 to fix the position of the base frame 1. Then, adjust the positioning mechanism 5 according to the location of the artery or vein to be anastomosed, and then adjust the positioning mechanism 5 and the limiting mechanism 3 according to the thickness of the patient's arm and the arm's support position to determine the position of the slide plate 4 in the groove 2. Once the patient's arm is stably positioned in the positioning mechanism 5, adjust the positioning mechanism 5 to reserve working space for the blood vessel, and then the surgeon can perform the vascular anastomosis.

[0057] Limiting mechanism 3 includes:

[0058] A through slot 301 is formed inside the base frame 1, and the through slot 301 penetrates the base frame 1;

[0059] Telescopic column 302 installed on the outside of base frame 1 and first connecting rod 303 connected to telescopic column 302;

[0060] The telescopic rod 304 installed outside the first connecting rod 303, and the second connecting rod 305 and the locking rod 306 connected to the telescopic end of the telescopic rod 304, the locking rod 306 is adapted to the through groove 301, and the locking rod 306 is adapted to the locking groove.

[0061] A first groove 307 and a second groove 314 are formed inside the base frame 1;

[0062] A movable plate 309 is slidably connected inside the first groove 307;

[0063] A connecting rod 311 and a pressure rod 312 connected to the connecting rod 311 are mounted on the movable plate 309;

[0064] A spring 310 is disposed inside the first groove 307 and is connected to the movable plate 309;

[0065] The first slide bar 313 is located below the movable plate 309 and is slidably connected to the inside of the base frame 1;

[0066] The chassis 308 is installed at the end of the first slide bar 313 away from the moving plate 309, and a suction strip is provided below the chassis 308.

[0067] The process of using the limiting mechanism 3 to limit the base frame 1:

[0068] The surgeon places the base frame 1 on the work platform. At this time, the spring 310 is in its initial state, and the base plate 308 is away from the work platform. The surgeon can adjust the position of the base frame 1 on the work platform. Then, the surgeon manually presses down the pressure rod 312. The pressure rod 312 presses down the first slide rod 313 and the moving plate 309. The moving plate 309 begins to move down in the second groove 314. At this time, the spring 310 is compressed. During the downward movement of the moving plate 309, the first slide rod 313 and the base plate 308 move down. The suction strip at the bottom of the base plate 308 gradually attracts and fixes itself on the work platform, thereby fixing the position of the base frame 1.

[0069] The process of using the limiting mechanism 3 to limit the slide plate 4:

[0070] The operator adjusts the distance between the two slide plates 4 according to the arm support distance, manually pulls the first connecting rod 303 outward, the first connecting rod 303 stretches the telescopic column 302, the telescopic column 302 drives the second connecting rod 305 and the locking rod 306 to disengage from the slot and through groove 301, the operator manually moves the position of the slide plate 4 in the slide groove 2, the slide plate 4 compresses the limiting strip during the movement. As the slide plate 4 moves to the designated position, according to the position of the slide plate 4, the operator manually pulls the second connecting rod 305 to adjust the position of the locking rods 306 on both sides, and then pushes the first connecting rod 303 towards the base frame 1, the locking rod 306 gradually enters the through groove 301 and the slot, fixing the position of the slide plate 4.

[0071] By setting a limiting mechanism 3, the base frame 1 is evenly and stably fixed on the worktable through the joint operation of the pressure rod 312, spring 310, moving plate 309, and suction strip of the base 308. The operator only needs to manually press down the pressure rod 312 to drive the first sliding rod 313 and the base 308 to move down, so that the suction strip is tightly adhered to the worktable surface. Since there are multiple sets of base 308 and suction strip, with multiple sets of base 308 and suction strip located on both sides of the bottom of the base frame 1, reliable limiting of the base frame 1 is achieved.

[0072] By setting a limiting mechanism 3, the slide plate 4 is limited in conjunction with the telescopic column 302, the first connecting rod 303, the second connecting rod 305, and the locking rod 306. The surgeon can pull the first connecting rod 303 to disengage the locking rod 306 from the slot of the slide plate 4 and the through groove 301 of the base frame 1, thereby freely adjusting the position of the slide plate 4 to a suitable position for the patient's arm support distance. After the position of the slide plate 4 is determined, pushing the first connecting rod 303 causes the locking rod 306 to pass through the through groove 301 and the slot in sequence, thus locking the slide plate 4. By setting a rubber limiting strip in the slide groove 2, moderate damping is provided during the movement of the slide plate 4, allowing it to stay within a limited range, facilitating the positioning and limiting of the slide plate 4.

[0073] Positioning mechanism 5 also includes:

[0074] The adjustment column 501 is installed on the top of the skateboard 4. The adjustment column 501 is a rod that can be manually adjusted in length. There are two skateboards 4 and two adjustment columns 501. One adjustment column 501 is connected to the first disc 502, and the other adjustment column 501 is connected to the second disc 507.

[0075] A first through hole 505 is formed inside the first disk 502 and the second disk 507. The first through hole 505 and the second through hole are positioned correspondingly. A pin is installed in the first through hole 505. The pin passes through the first through hole 505 and the second through hole to lock the second slide rod 503 at the corresponding angle in the first disk 502 or the second disk 507.

[0076] A first adjusting rod 508 is installed outside the second disk 507, and the first adjusting rod 508 is configured as a rod whose length can be manually adjusted;

[0077] Mounting component 509 is disposed at the end of the first adjusting rod 508 away from the second disk 507;

[0078] The third slide rod 506 is disposed outside the first disk 502 and the outer ring 511 is connected to the end of the third slide rod 506 away from the first disk 502. The outer ring 511 serves to limit the third slide rod 506 and prevent the third slide rod 506 from detaching from the connecting cylinder 510.

[0079] The connecting cylinder 510 is located outside the second disk 507, and the third slide rod 506 is slidably connected to the inside of the connecting cylinder 510.

[0080] The process of adjusting the position of the slide plate 4 using positioning mechanism 5 in conjunction with limiting mechanism 3:

[0081] As the operator moves the position of the slide plate 4, the slide plate 4 drives the adjustment column 501, the first disc 502, the second disc 507, the third slide rod 506, and the connecting cylinder 510 to move, and the third slide rod 506 begins to slide relative to the connecting cylinder 510.

[0082] The process of adjusting the angle of the second slide bar 503 using the positioning mechanism 5:

[0083] Depending on the patient's arm thickness, the surgeon manually adjusts the angle of the second slide bar 503 within the first disc 502 and the second disc 507, and uses a pin to fix the position of the second slide bar 503. Subsequently, depending on the location of the blood vessel mounting, the surgeon manually adjusts the stroke of the first adjusting rod 508, thereby adjusting the position of the mounting component 509.

[0084] The patient places their arm on the two sets of contact elements 504, adjusts the mounting component 509 to reserve working space for the blood vessel mounting, and then the surgeon can perform the blood vessel anastomosis.

[0085] By setting up a positioning mechanism 5, the angles of the contact element 504 and the second slide rod 503 that come into contact with the patient's arm are adjusted. Existing arm arteriovenous anastomosis assistive devices, due to the fixed position of the arm-supporting rods, are difficult to adapt to different arm sizes and curves. Therefore, a second slide rod 503 that can slide within the first disc 502 or the second disc 507 is provided. By adjusting the angle of the second slide rod 503, the angles of the contact element 504 and the second slide rod 503 that come into contact with the patient's arm are adjusted, thereby solving the aforementioned problems.

[0086] Component 509 includes:

[0087] A movable ring 5091 is disposed at the end of the first adjusting rod 508 away from the second disk 507;

[0088] A second adjusting rod 5092 is installed above the moving ring 5091, and a receiving plate 5093 is connected to the second adjusting rod 5092. An elastic plate is provided above the receiving plate 5093.

[0089] The first push rod 5094 and the connecting rod 5095 connected to the first push rod 5094 are provided on both sides of the receiving plate 5093. The first push rod 5094 is an electric push rod, and the connecting rod 5095 is composed of an L-shaped rod and an electric push rod in the vertical direction.

[0090] The bracket 5096 installed on the outside of the connecting rod 5095 and the mounting member 5097 that engages with the bracket 5096 are selected to install Y-shaped, L-shaped or straight mounting plates in the bracket 5096 according to the shape of the blood vessel.

[0091] The process of adjusting the mounting component 509 to reserve working space for the patient's arm:

[0092] The first push rod 5094 is activated, which drives the connecting rod 5095, the card holder 5096, and the mounting piece 5097 to move away from the receiving plate 5093, thus reserving working space for the patient to place their arm.

[0093] The process of mounting blood vessels using mounting component 509:

[0094] With the patient's arm positioned on the two sets of contact pieces 504, the elastic plate above the receiving plate 5093 is compressed in the middle region of the arm, causing the elastic plate to deform accordingly. The surgeon gently lifts the blood vessel and then adjusts the first push rod 5094. The first push rod 5094 drives the connecting rod 5095, the bracket 5096, and the mounting piece 5097 to move horizontally toward the patient's arm. The mounting piece 5097 gradually enters the surgical area, and the surgeon mounts the blood vessel on the mounting piece 5097. The surgeon adjusts the stroke of the electric push rod in the connecting rod 5095 according to the required height of the blood vessel to control the two blood vessels to be at approximately the same height before performing the vascular anastomosis.

[0095] By setting up the mounting component 509, and with the cooperation of the moving ring 5091, the receiving plate 5093, the elastic plate, the first push rod 5094, the connecting rod 5095, and the replaceable mounting component 5097, the support and elevation of the dissected arteries and veins are achieved. After the patient's arm is placed on the two sets of contact components 504, the middle area of ​​the arm naturally presses down on the elastic plate above the receiving plate 5093. The elastic plate undergoes adaptive deformation to conform to the curvature of the arm surface, which not only improves patient comfort but also provides a stable base support for vascular mounting.

[0096] Working principle: Before using the device, the operator places the base frame 1 on the work platform. At this time, the spring 310 is in its initial state, and the base plate 308 is away from the work platform. The operator can adjust the position of the base frame 1 on the work platform. Then, the operator manually presses down the pressure rod 312. The pressure rod 312 presses down the first slide rod 313 and the moving plate 309. The moving plate 309 begins to move down in the second groove 314. At this time, the spring 310 is compressed. During the downward movement of the moving plate 309, the first slide rod 313 and the base plate 308 move down. The suction strip at the bottom of the base plate 308 gradually adheres and fixes itself to the work platform, thereby fixing the position of the base frame 1.

[0097] The operator adjusts the distance between the two slide plates 4 according to the arm support distance, manually pulls the first connecting rod 303 outward, the first connecting rod 303 stretches the telescopic column 302, the telescopic column 302 drives the second connecting rod 305 and the locking rod 306 to disengage from the slot and through groove 301, the operator manually moves the position of the slide plate 4 in the slide groove 2, the slide plate 4 compresses the limiting strip during the movement. As the slide plate 4 moves to the designated position, according to the position of the slide plate 4, the operator manually pulls the second connecting rod 305 to adjust the position of the locking rods 306 on both sides, and then pushes the first connecting rod 303 towards the base frame 1, the locking rod 306 gradually enters the through groove 301 and the slot, fixing the position of the slide plate 4.

[0098] As the operator moves the position of the slide plate 4, the slide plate 4 drives the adjustment column 501, the first disc 502, the second disc 507, the third slide rod 506, and the connecting cylinder 510 to move, and the third slide rod 506 begins to slide relative to the connecting cylinder 510.

[0099] Depending on the patient's arm thickness, the surgeon manually adjusts the angle of the second slide bar 503 within the first disc 502 and the second disc 507, and uses a pin to fix the position of the second slide bar 503. Subsequently, depending on the location of the blood vessel mounting, the surgeon manually adjusts the stroke of the first adjusting rod 508, thereby adjusting the position of the mounting component 509.

[0100] The first push rod 5094 is activated, which drives the connecting rod 5095, the card holder 5096, and the mounting piece 5097 to move away from the receiving plate 5093, thus reserving working space for the patient to place their arm.

[0101] With the patient's arm positioned on the two sets of contact pieces 504, the elastic plate above the receiving plate 5093 is compressed in the middle region of the arm, causing the elastic plate to deform accordingly. The surgeon gently lifts the blood vessel and then adjusts the first push rod 5094. The first push rod 5094 drives the connecting rod 5095, the bracket 5096, and the mounting piece 5097 to move horizontally toward the patient's arm. The mounting piece 5097 gradually enters the surgical area, and the surgeon mounts the blood vessel on the mounting piece 5097. The surgeon adjusts the stroke of the electric push rod in the connecting rod 5095 according to the required height of the blood vessel to control the two blood vessels to be at approximately the same height before performing the vascular anastomosis.

[0102] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. An arteriovenous anastomosis assistive device for the arm, comprising a base frame (1), characterized in that, Also includes: A groove (2) is opened inside the base frame (1) and a slide plate (4) is slidably connected inside the groove (2); Limiting mechanism (3) is installed inside the base frame (1); A positioning mechanism (5) is provided above the slide plate (4). The positioning mechanism (5) includes a first disk (502) and a second disk (507) provided above the slide plate (4), a second slide rod (503) slidably connected inside the first disk (502) and the second disk (507), and a contact member (504) provided on the second slide rod (503). The second slide rod (503) is used to drive the contact member (504) to deflect.

2. The arm arteriovenous anastomosis assist device according to claim 1, characterized in that: The limiting mechanism (3) includes: A through slot (301) is formed inside the base frame (1), the through slot (301) penetrating the base frame (1); Telescopic column (302) installed on the outside of the base frame (1) and first connecting rod (303) connected to the telescopic column (302). The telescopic rod (304) installed outside the first connecting rod (303) and the second connecting rod (305) and the locking rod (306) connected to the telescopic end of the telescopic rod (304) are adapted to the through groove (301).

3. The arm arteriovenous anastomosis assist device according to claim 2, characterized in that: The limiting mechanism (3) further includes: The first groove (307) and the second groove (314) are formed inside the base frame (1). A movable plate (309) is slidably connected inside the first groove (307); A connecting rod (311) and a pressure rod (312) connected to the connecting rod (311) are mounted on the movable plate (309).

4. The arm arteriovenous anastomosis assist device according to claim 3, characterized in that: The limiting mechanism (3) further includes: A spring (310) is disposed inside the first groove (307), and the spring (310) is connected to the movable plate (309); The first slide bar (313) is located below the movable plate (309) and is slidably connected to the inside of the base frame (1); The chassis (308) is installed on the end of the first slide bar (313) away from the moving plate (309).

5. The arm arteriovenous anastomosis assist device according to claim 1, characterized in that: The positioning mechanism (5) further includes: An adjustment column (501) is installed above the slide plate (4). There are two of the slide plate (4) and the adjustment column (501). One of the adjustment columns (501) is connected to the first disc (502), and the other adjustment column (501) is connected to the second disc (507). A first through hole (505) is formed inside the first disk (502) and the second disk (507).

6. The arm arteriovenous anastomosis assist device according to claim 5, characterized in that: The positioning mechanism (5) further includes: The first adjusting rod (508) is installed on the outside of the second disk (507); Mounting component (509) is located at the end of the first adjusting rod (508) away from the second disk (507).

7. The arm arteriovenous anastomosis assist device according to claim 6, characterized in that: The positioning mechanism (5) further includes: A third slide bar (506) is disposed outside the first disk (502) and an outer ring (511) is connected to the end of the third slide bar (506) away from the first disk (502); The connecting cylinder (510) is located outside the second disk (507), and the third slide rod (506) is slidably connected to the inside of the connecting cylinder (510).

8. The arm arteriovenous anastomosis assist device according to claim 6, characterized in that: The mounting component (509) includes: A movable ring (5091) is located at the end of the first adjusting rod (508) away from the second disk (507); The second adjusting rod (5092) and the receiving plate (5093) connected to the second adjusting rod (5092) are installed above the moving ring (5091).

9. The arm arteriovenous anastomosis assist device according to claim 8, characterized in that: The mounting component (509) also includes: The first push rod (5094) and the connecting rod (5095) connected to the first push rod (5094) are provided on both sides of the receiving plate (5093). The mounting bracket (5096) is installed on the outside of the connecting rod (5095), and the mounting member (5097) is engaged with the mounting bracket (5096).

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