Auxiliary device for arteriovenous fistula puncture and method of using the same

Abstract

This invention relates to the field of arteriovenous fistula puncture technology, and discloses an auxiliary device for arteriovenous fistula puncture and its usage method. The device includes a first arm ring, with adjustment mechanisms fixedly connected to both ends. These adjustment mechanisms are used to adjust and pull the desired puncture vessel. A pressing and pulling mechanism is fixedly connected to the bottom of the adjustment mechanism, which is used to conform to the skin for easy traction and fixation of the vessel. A fixing mechanism is fixedly connected to the outer side of the first arm ring, used to fix the upper part of the puncture vessel. This invention rotates a knob to drive a first connecting rod, which in turn drives a second connecting rod to follow an arc trajectory via a slider. This allows a pressing plate to press and pull backward on the puncture vessel simultaneously via the second connecting rod, eliminating the need for medical personnel to pull the vessel with one hand during puncture, thus increasing the stability and accuracy of the puncture.

Description

Technical Field

[0001] This invention relates to the field of arteriovenous fistula puncture technology, specifically to an auxiliary device for arteriovenous fistula puncture and its usage method. Background Technology

[0002] In the clinical diagnosis and treatment of hemodialysis, arteriovenous fistula puncture is a crucial procedure for dialysis treatment. During the puncture, not only is reliable fixation and restraint of the patient's arm necessary, but precise control of the vascular condition and skin morphology is also essential for a successful procedure. In actual clinical practice, when the patient's arm is relaxed, the skin is loose, and the blood vessels are prone to displacement, movement, and irregular positioning, making it difficult for medical staff to quickly locate the puncture point. Furthermore, loose skin and soft tissue can obscure the blood vessel's course, further increasing the difficulty of puncture localization and easily leading to puncture deviation, repeated needle pricks, etc., which not only increase the patient's pain but also significantly reduce the success rate of the puncture.

[0003] Currently, conventional arm fixation devices only provide basic limb restraint, offering limited functionality. They cannot effectively stretch and flatten the skin in the puncture area, nor can they specifically press and fix subcutaneous blood vessels, making it difficult to regulate blood vessel direction and pinpoint the puncture location. Medical staff must rely on manually pulling the patient's skin and manually pressing and fixing blood vessels to assist in the puncture, which is difficult to perform and results in unstable hand strength. This not only increases the workload for medical staff but also makes it difficult to control the amount of pressure applied manually. Excessive force can compress blood vessels and obstruct blood flow, while insufficient force fails to fix blood vessels and stretch the skin, compromising puncture accuracy.

[0004] In addition, the existing fixation structure lacks a dedicated skin traction and vascular positioning auxiliary structure, which makes it impossible to accurately flatten the skin at the puncture site according to the puncture requirements, to stably press and restrain the arteriovenous fistula, and to quickly form a regular and clear puncture operation area. The puncture field of view is poor, the positioning efficiency is low, and the puncture operation time is prolonged, which not only affects the efficiency of diagnosis and treatment, but also easily causes patients to be nervous, which is not conducive to the efficient completion of dialysis puncture in clinical practice. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an auxiliary device for arteriovenous fistula puncture and its usage method, which solves the problems of insufficient precision and inaccurate positioning caused by loose patient skin when using traditional single-handed puncture by pressing the blood vessel.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The first aspect of the present invention provides an auxiliary device for arteriovenous fistula puncture, including a first arm ring, with an adjustment mechanism fixedly connected to both ends of the first arm ring. The adjustment mechanism is used to adjust and pull the required puncture vessel. A pressing and pulling mechanism is fixedly connected to the bottom of the adjustment mechanism. The pressing and pulling mechanism is used to conform to the skin to facilitate pulling and fixing the vessel. A fixing mechanism is fixedly connected to the outside of the first arm ring. The fixing mechanism is used to fix the upper half of the puncture vessel. The adjustment mechanism includes an adjustment housing, which is fixedly connected to both ends of the first arm ring. A rotating rod is rotatably connected inside the adjustment housing, and a knob is slidably connected to the outer side of the rotating rod. A toothed block is fixedly connected to the outer side of the knob. A toothed groove is formed on the inner side of the adjustment housing. A magnetic ring one is fixedly connected to the side of the knob near the adjustment housing, and a magnetic ring two is fixedly connected to the inner side of the adjustment housing. A first connecting rod is fixedly connected to the outer side of the rotating rod. A slider is rotatably connected to the end of the first connecting rod away from the knob. A second connecting rod is rotatably connected to the outer side of the slider. An arc-shaped groove is formed inside the adjustment housing, and a spring is provided inside the arc-shaped groove. A moving block is slidably connected to the inner side of the second connecting rod.

[0007] Preferably, the pressing and pulling mechanism includes a pressing plate, which is fixedly connected to the bottom of the second connecting rod. A rubber pad is fixedly connected to the bottom of the pressing plate. Two arc-shaped patches are rotatably connected to the outer side of the pressing plate. A torsion spring is sleeved on the outer side of the arc-shaped patches. A first anti-slip layer is fixedly connected to the outer side of the arc-shaped patches.

[0008] Preferably, the fixing mechanism includes a connecting arm ring, which is fixedly connected to the outside of the first arm ring. Two collars are slidably connected to the outside of the connecting arm ring. A sliding band is fixedly connected to the inside of the collars. A second anti-slip layer and a sliding patch are fixedly connected to the end of the sliding band away from the collars.

[0009] Preferably, the tooth block and the tooth groove are in a pre-engagement position, the first magnetic ring and the second magnetic ring are opposite pole magnets, and the first connecting rod is rotatably connected inside the adjusting housing.

[0010] Preferably, the slider is slidably connected to the inner side of the arc-shaped groove, the arc of the arc-shaped groove is set with the rotating rod as the center, one end of the spring is fixedly connected to the inner side of the arc-shaped groove, and the other end of the spring is fixedly connected to the outer side of the slider.

[0011] Preferably, the movable block is slidably connected inside the adjusting housing, the second connecting rod is slidably connected inside the adjusting housing, and the movement direction of the movable block on the second connecting rod is perpendicular to the movement direction of the movable block in the adjusting housing.

[0012] Preferably, one end of the torsion spring is fixedly connected to the outside of the pressing plate, and the other end of the torsion spring is fixedly connected to the inside of the arc-shaped patch, with the two arc-shaped patches arranged symmetrically.

[0013] Preferably, the pressing plate is located directly below the adjusting housing, the movement direction of the second connecting rod is the same as the movement direction of the slider, and the movement direction of the pressing plate is the same as the movement direction of the second connecting rod.

[0014] Preferably, the second anti-slip layer is fixedly connected to the side of the sliding band away from the connecting arm ring, the sliding patch is fixedly connected to the side of the connecting arm ring, the sliding band is slidably connected to the inside of the connecting arm ring, and the sliding patch is slidably connected to the inside of the connecting arm ring.

[0015] A second aspect of the present invention provides a method of using an auxiliary device for arteriovenous fistula puncture, comprising the following steps: First, the first arm ring and the fixing mechanism are fixed on the upper and lower sides of the arm puncture site. The pressure and traction mechanism is adjusted by the adjustment mechanism to fix the blood vessel for easy puncture. Turning the knob drives the internally sliding rotating rod to rotate, thereby driving the first connecting rod fixedly connected to the outside of the rotating rod to rotate together. The rotation of the first connecting rod will cause the inner rotating connected slider to slide inside the arc groove, so that the slider will continuously compress the spring inside the arc groove. At the same time, the slider will drive the outer rotating connected second connecting rod to move together. Since the moving block connected to the inner side of the second connecting rod slides inside the adjusting shell at the same time, the second connecting rod will move in an arc trajectory with the slider in a vertical state. The arc trajectory movement of the second connecting rod will drive the bottom fixed connected pressing plate to make the same movement. The movement of the pressure plate along its arc-shaped trajectory causes the rubber pad fixed at the bottom to press against the blood vessel to be punctured and pull it backward, thereby fixing the blood vessel to be punctured. At the same time, the arc-shaped patches connected to both sides of the pressure plate remain in close contact with the skin of the arm under the tension of the torsion spring. This causes the backward pulling of the pressure plate to pull the first anti-slip layer fixed to the outer side of the arc-shaped patch and the skin around the blood vessel backward together. Then push the knob in the direction of the adjustment housing, so that the tooth block fixedly connected to the outside of the knob meshes with the tooth groove opened on the inside of the adjustment housing, thereby restricting the rotation. At the same time, the magnetic ring one fixedly connected inside the knob and the magnetic ring two fixedly connected inside the adjustment housing attract each other, so that the knob is fixed. The connecting arm ring is fixed above the puncture site on the arm. Pulling the outer sliding ring of the connecting arm ring moves the sliding band. The sliding band moves inside the connecting arm ring through the outer fixed sliding patch. The second anti-slip layer fixed to the outer side of the sliding band moves the skin together, so that the skin above the puncture site on the patient's arm is pulled. The second anti-slip layer and the first anti-slip layer below the puncture site pull the skin at the puncture site in opposite directions. When the puncture is completed, pulling the knob disengages the toothed block from the toothed groove. At this time, the spring inside the arc groove will drive the slider to reset, and the slider will drive the second connecting rod to reset. The reset of the second connecting rod will drive the pressing plate to reset.

[0016] This invention provides an auxiliary device for arteriovenous fistula puncture and its method of use. It has the following beneficial effects: 1. This invention rotates the knob to drive the first connecting rod to rotate, which in turn drives the second connecting rod to make an arc-shaped trajectory through the slider. This allows the pressing plate to press the punctured blood vessel through the second connecting rod while being dragged backward and fixed, so that medical personnel do not need to pull the blood vessel with one hand to perform puncture, thus increasing the stability and accuracy of puncture.

[0017] 2. The present invention uses an arc-shaped patch to follow the arc trajectory of the pressing plate, so that the first anti-slip layer on the outer side of the arc-shaped patch pulls the skin around the blood vessel, which facilitates the positioning of the puncture position and avoids the blood vessel from deviating.

[0018] 3. The present invention fixes the upper side of the puncture site on the arm by connecting the arm ring, and then pulls the ring to pull the second anti-slip layer to pull the skin. This works in conjunction with the arc-shaped patch to make the skin at the puncture site flat and fix the blood vessels, thus making it easier for medical staff to locate the puncture site. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle; Figure 5 for Figure 2 Enlarged view of point C in the middle; Figure 6 for Figure 2 Enlarged view of point D in the middle; Figure 7 This is a schematic diagram of the pressing plate of the present invention; Figure 8 This is a schematic diagram of the connecting arm ring of the present invention; Figure 9 This is a schematic diagram of the structure of the sliding patch of the present invention.

[0020] The components include: 1. First arm ring; 2. Adjustment mechanism; 3. Pressing and pulling mechanism; 4. Fixing mechanism; 201. Adjustment housing; 202. Knob; 203. Tooth block; 204. Tooth groove; 205. Rotating rod; 206. Magnetic ring one; 207. Magnetic ring two; 208. First connecting rod; 209. Slider; 210. Second connecting rod; 211. Spring; 212. Arc groove; 213. Moving block; 301. Pressing plate; 302. Arc patch; 303. Torsion spring; 304. Rubber pad; 305. First anti-slip layer; 401. Connecting arm ring; 402. Collar; 403. Sliding belt; 404. Second anti-slip layer; 405. Sliding patch. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see the appendix Figure 1 -Appendix Figure 6 This invention provides an auxiliary device for arteriovenous fistula puncture and its usage method, including a first arm ring 1. Adjustment mechanisms 2 are fixedly connected to both ends of the first arm ring 1. The adjustment mechanisms 2 are used to adjust and pull the required puncture vessel, allowing medical personnel to perform puncture without pulling the vessel with one hand. A pressing and pulling mechanism 3 is fixedly connected to the bottom of the adjustment mechanism 2. The pressing and pulling mechanism 3 is used to conform to the skin for easy pulling and fixing of the vessel. The pressing and pulling mechanism 3 is adjusted and fixed by the adjustment mechanism 2. A fixing mechanism 4 is fixedly connected to the outside of the first arm ring 1. The fixing mechanism 4 is used to fix the upper part of the puncture vessel, enabling medical personnel to quickly locate the puncture even in patients with loose skin. The adjustment mechanism 2 includes an adjustment housing 201, which is fixedly connected to both ends of the first arm ring 1. A rotating rod 205 is rotatably connected inside the adjustment housing 201. A knob 202 is slidably connected to the outer side of the rotating rod 205, allowing adjustment of the rotating rod 205. A toothed block 203 is fixedly connected to the outer side of the knob 202. A toothed groove 204 is formed on the inner side of the adjustment housing 201. Pushing the knob 202 causes the toothed block 203 to engage with the toothed groove 204, fixing the rotating rod 205. A magnetic ring 206 is fixedly connected to the side of the knob 202 closest to the adjustment housing 201, and a magnetic ring 207 is fixedly connected to the inner side of the adjustment housing 201, allowing the knob 202 to be fixed inside the adjustment housing 201. A first connecting rod 208 is fixedly connected to the outer side of the rotating rod 205. A slider 209 is rotatably connected to the end of the first connecting rod 208 away from the knob 202. The rotating rod 205 drives the first connecting rod 208 to rotate, thereby driving the slider 209 to slide. A second connecting rod 210 is rotatably connected to the outer side of the slider 209, so that the sliding of the slider 209 can drive the second connecting rod 210 to move together. An arc-shaped groove 212 is provided inside the adjusting housing 201 to limit the slider 209. A spring 211 is provided inside the arc-shaped groove 212. A moving block 213 is slidably connected to the inner side of the second connecting rod 210. The limiting of the moving block 213 allows the second connecting rod 210 to move along the same path as the slider 209.

[0023] Please see the appendix Figure 1 Appendix Figure 2 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 and attached Figure 7 In a preferred embodiment of the present invention, the pressing and pulling mechanism 3 includes a pressing plate 301, which is fixedly connected to the bottom of the second connecting rod 210. A rubber pad 304 is fixedly connected to the bottom of the pressing plate 301. The rubber pad at the bottom of the pressing plate 301 is driven by the second connecting rod 210 to press and pull the blood vessel. Two arc-shaped patches 302 are rotatably connected to the outside of the pressing plate 301. A torsion spring 303 is sleeved on the outside of the arc-shaped patch 302. A first anti-slip layer 305 is fixedly connected to the outside of the arc-shaped patch 302. The first anti-slip layer 305 on the outside of the arc-shaped patch 302 is driven by the torsion spring 303 to adhere to the skin.

[0024] Please see the appendix Figure 1 and attached Figure 8In a preferred embodiment of the present invention, the fixing mechanism 4 includes a connecting arm ring 401, which is fixedly connected to the outside of the first arm ring 1 to fix the upper and lower ends of the puncture position. Two collars 402 are slidably connected to the outside of the connecting arm ring 401. A sliding band 403 is fixedly connected to the inside of the collars 402. A second anti-slip layer 404 and a sliding patch 405 are fixedly connected to the end of the sliding band 403 away from the collars 402. By pulling the collars 402, the anti-slip layer 404 on the outside of the sliding band 403 is pulled to stretch the loose skin.

[0025] Please see the appendix Figure 2 - Appendix Figure 4 In a preferred embodiment of the present invention, the tooth block 203 and the tooth groove 204 are in a pre-engagement position, the magnetic ring 1 206 and the magnetic ring 207 are opposite pole magnets, so that the knob 202 is fixed and will not rotate after entering the interior of the adjustment housing 201, and the first connecting rod 208 is rotatably connected to the interior of the adjustment housing 201.

[0026] Please see the appendix Figure 3 - Appendix Figure 5 In a preferred embodiment of the present invention, the slider 209 is slidably connected to the inner side of the arc groove 212. The arc of the arc groove 212 is set with the rotating rod 205 as the center. The rotating rod 205 will drive the slider 209 to slide along the arc groove 212. One end of the spring 211 is fixedly connected to the inner side of the arc groove 212, and the other end of the spring 211 is fixedly connected to the outer side of the slider 209. When the slider 209 is no longer restricted, the spring 211 will drive the slider 209 to reset.

[0027] Please see the appendix Figure 2 - Appendix Figure 5 In a preferred embodiment of the present invention, the moving block 213 is slidably connected inside the adjusting housing 201, and the second connecting rod 210 is slidably connected inside the adjusting housing 201. The movement direction of the moving block 213 and the movement direction of the second connecting rod 210 are perpendicular to each other, so that the second connecting rod 210 moves together with the slider 209 in an arc trajectory under the restriction of the moving block 213.

[0028] Please see the appendix Figure 5 - Appendix Figure 7 In a preferred embodiment of the present invention, one end of the torsion spring 303 is fixedly connected to the outside of the pressing plate 301, and the other end of the torsion spring 303 is fixedly connected to the inside of the arc-shaped patch 302. The two arc-shaped patches 302 are arranged symmetrically so that the two arc-shaped patches 302 can adhere tightly to the skin surface.

[0029] Please see the appendix Figure 2 - Appendix Figure 7In a preferred embodiment of the present invention, the pressing plate 301 is located directly below the adjusting housing 201, the movement direction of the second connecting rod 210 is the same as the movement direction of the slider 209, and the movement direction of the pressing plate 301 is the same as the movement direction of the second connecting rod 210, so that the second connecting rod 210 can drive the pressing plate 301 to move in an arc trajectory, thereby pressing and pulling the blood vessel.

[0030] Please see the appendix Figure 8 - Appendix Figure 9 In a preferred embodiment of the present invention, the second anti-slip layer 404 is fixedly connected to the side of the sliding band 403 away from the connecting arm ring 401, and the sliding patch 405 is fixedly connected to the side close to the connecting arm ring 401. This prevents the sliding band 403 from shifting while the second anti-slip layer 404 can pull the skin. The sliding band 403 is slidably connected to the inside of the connecting arm ring 401, and the sliding patch 405 is slidably connected to the inside of the connecting arm ring 401. This pulls the skin at the fixed position of the connecting arm ring 401 while avoiding causing discomfort to the patient.

[0031] The method of using an auxiliary device for arteriovenous fistula puncture described below can be referred to in correspondence with the auxiliary device for arteriovenous fistula puncture described above.

[0032] This invention also provides a method for using an auxiliary device for arteriovenous fistula puncture, the method comprising the following steps: First, the first arm ring 1 and the fixing mechanism 4 are fixed on the upper and lower sides of the arm puncture position. The pressing and pulling mechanism 3 is adjusted by the adjusting mechanism 2 to fix the blood vessel for easy puncture. The knob 202 is turned to drive the internally sliding rotating rod 205 to rotate, thereby driving the first connecting rod 208 fixedly connected to the outside of the rotating rod 205 to rotate together. The rotation of the first connecting rod 208 will cause the inner rotating connected slider 209 to slide inside the arc groove 212, so that the slider 209 will continuously compress the spring 211 inside the arc groove 212. At the same time, the slider 209 will drive the outer rotating connected second connecting rod 210 to move together. Since the moving block 213 slidably connected inside the second connecting rod 210 slides inside the adjusting shell 201, the second connecting rod 210 will move in an arc trajectory with the slider 209 in a vertical state. The arc trajectory movement of the second connecting rod 210 will drive the bottom fixed connected pressing plate 301 to make the same movement. The movement of the pressure plate 301 along its arc-shaped trajectory causes the rubber pad 304, which is fixedly connected at the bottom, to press against the blood vessel to be punctured and pull it backward, thereby fixing the blood vessel to be punctured. At the same time, the arc-shaped patches 302, which are rotatably connected to both sides of the pressure plate 301, remain in close contact with the skin of the arm under the tension of the torsion spring 303. This causes the backward pulling of the pressure plate 301 to pull the first anti-slip layer 305, which is fixedly connected to the outer side of the arc-shaped patch 302, and the skin around the blood vessel to be pulled backward together. Then push the knob 202 in the direction of the adjusting housing 201, so that the tooth block 203 fixedly connected to the outside of the knob 202 meshes with the tooth groove 204 opened on the inside of the adjusting housing 201 to restrict rotation. At the same time, the magnetic ring 206 fixedly connected inside the knob 202 and the magnetic ring 207 fixedly connected inside the adjusting housing 201 attract each other to fix the knob 202. The connecting arm ring 401 is fixed above the puncture site on the arm. Pulling the outer sliding ring 402 of the connecting arm ring 401 moves the sliding band 403. The sliding band 403 is always moved inside the connecting arm ring 401 through the outer fixed sliding patch 405. The second anti-slip layer 404 fixedly connected to the outer side of the sliding band 403 moves the skin together, so that the skin above the puncture site on the patient's arm is pulled. The second anti-slip layer 404 and the first anti-slip layer 305 below the puncture site pull the skin at the puncture site in the opposite direction. When the puncture is completed, pull the knob 202 to disengage the toothed block 203 from the toothed groove 204. At this time, the spring 211 inside the arc groove 212 will drive the slider 209 to reset. Simultaneously, the slider 209 will drive the second connecting rod 210 to reset. The reset of the second connecting rod 210 will drive the pressing plate 301 to reset.

[0033] The method in this embodiment can be used to execute the above-described device embodiment, and its principle and technical effects are similar, so they will not be repeated here.

[0034] Working principle: First, medical staff fix the first arm ring 1 and the fixing mechanism 4 on the upper and lower sides of the puncture site on the patient's arm. The adjustment mechanism 2 adjusts the pressing and pulling mechanism 3 to fix the blood vessel for easy puncture. Turning the knob 202 drives the rotating rod 205, which is internally slidably connected, to rotate. This causes the first connecting rod 208, which is fixedly connected to the outside of the rotating rod 205, to rotate together. The rotation of the first connecting rod 208 causes the slider 209, which is internally slidably connected, to slide inside the arc groove 212. This causes the slider 209 to continuously compress the spring 211 inside the arc groove 212. At the same time, the slider 209 causes the second connecting rod 210, which is externally slidably connected, to move together. Since the moving block 213, which is internally slidably connected to the second connecting rod 210, slides inside the adjusting shell 201, the second connecting rod 210 moves in an arc trajectory with the slider 209 in a vertical state. The arc trajectory movement of the second connecting rod 210 causes the pressing plate 301, which is fixedly connected to the bottom, to move in the same way. The movement of the pressure plate 301 along its arc-shaped trajectory causes the rubber pad 304, which is fixedly connected at the bottom, to press against the blood vessel to be punctured and pull it backward, thereby fixing the blood vessel. Simultaneously, the arc-shaped patches 302, rotatably connected to both sides of the pressure plate 301, remain firmly against the skin of the arm under the tension of the torsion spring 303. This causes the backward pull of the pressure plate 301 to pull the first anti-slip layer 305, fixedly connected to the outer side of the arc-shaped patches 302, and the skin around the blood vessel backward as well, mimicking the technique used by medical personnel during puncture, effectively assisting... The fixation of blood vessels and the tightening of the skin facilitate puncture by medical staff; then, the knob 202 is pushed in the direction of the adjusting shell 201, so that the toothed block 203 fixedly connected to the outside of the knob 202 and the toothed groove 204 opened on the inside of the adjusting shell 201 mesh with each other to restrict rotation. At the same time, the magnetic ring 206 fixedly connected inside the knob 202 and the magnetic ring 207 fixedly connected inside the adjusting shell 201 attract each other to fix the knob 202, reducing complicated preparation work before puncture and increasing puncture efficiency. The connecting arm ring 401 is fixed above the puncture site on the arm. Pulling the outer sliding ring 402 of the connecting arm ring 401 moves the sliding band 403. The sliding band 403 is always moving inside the connecting arm ring 401 through the outer fixed sliding patch 405. The second anti-slip layer 404, which is fixed to the outer side of the sliding band 403, moves the skin together, so that the skin above the puncture site on the patient's arm is pulled. The second anti-slip layer 404 and the first anti-slip layer 305 below the puncture site pull the skin at the puncture site in the opposite direction, thereby tightening the skin at the puncture site to facilitate the medical staff to perform positioning and puncture. When the puncture is completed, pulling the knob 202 disengages the toothed block 203 from the toothed groove 204. At this time, the spring 211 inside the arc-shaped groove 212 will drive the slider 209 to reset. Simultaneously, the slider 209 will drive the second connecting rod 210 to reset. The reset of the second connecting rod 210 will drive the pressing plate 301 to reset, thereby releasing the positioning of the blood vessel and the tension of the skin.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary device for arteriovenous fistula puncture, comprising a first arm ring (1), characterized in that... An adjustment mechanism (2) is fixedly connected to both ends of the first arm ring (1). The adjustment mechanism (2) is used to adjust the traction of the punctured blood vessel. A pressing and pulling mechanism (3) is fixedly connected to the bottom of the adjustment mechanism (2). The pressing and pulling mechanism (3) is used to fit the skin to facilitate traction and fixation of the blood vessel. A fixing mechanism (4) is fixedly connected to the outside of the first arm ring (1). The fixing mechanism (4) is used to fix the upper half of the punctured blood vessel. The adjustment mechanism (2) includes an adjustment housing (201), which is fixedly connected to both ends of the first arm ring (1). A rotating rod (205) is rotatably connected inside the adjustment housing (201). A knob (202) is slidably connected to the outside of the rotating rod (205). A toothed block (203) is fixedly connected to the outside of the knob (202). A toothed groove (204) is provided on the inside of the adjustment housing (201). A magnetic ring (206) is fixedly connected to the side of the knob (202) near the adjustment housing (201). A magnetic ring (207) is fixedly connected to the inner side of (201), and a first connecting rod (208) is fixedly connected to the outer side of the rotating rod (205). A slider (209) is rotatably connected to the end of the first connecting rod (208) away from the knob (202). A second connecting rod (210) is rotatably connected to the outer side of the slider (209). An arc groove (212) is opened inside the adjusting housing (201). A spring (211) is provided on the inner side of the arc groove (212). A moving block (213) is slidably connected to the inner side of the second connecting rod (210).

2. The auxiliary device for arteriovenous fistula puncture according to claim 1, characterized in that, The pressing and pulling mechanism (3) includes a pressing plate (301), which is fixedly connected to the bottom of the second connecting rod (210). A rubber pad (304) is fixedly connected to the bottom of the pressing plate (301). Two arc-shaped patches (302) are rotatably connected to the outside of the pressing plate (301). A torsion spring (303) is sleeved on the outside of the arc-shaped patch (302). A first anti-slip layer (305) is fixedly connected to the outside of the arc-shaped patch (302).

3. The auxiliary device for arteriovenous fistula puncture according to claim 1, characterized in that, The fixing mechanism (4) includes a connecting arm ring (401), which is fixedly connected to the outside of the first arm ring (1). Two collars (402) are slidably connected to the outside of the connecting arm ring (401). A sliding band (403) is fixedly connected to the inside of the collar (402). A second anti-slip layer (404) and a sliding patch (405) are fixedly connected to one end of the sliding band (403) away from the collar (402).

4. The auxiliary device for arteriovenous fistula puncture according to claim 1, characterized in that, The tooth block (203) and tooth groove (204) are in a pre-engagement position, the first magnetic ring (206) and the second magnetic ring (207) are opposite pole magnets, and the first connecting rod (208) is rotatably connected to the inside of the adjusting shell (201).

5. The auxiliary device for arteriovenous fistula puncture according to claim 1, characterized in that, The slider (209) is slidably connected to the inner side of the arc groove (212). The arc of the arc groove (212) is set with the rotating rod (205) as the center. One end of the spring (211) is fixedly connected to the inner side of the arc groove (212), and the other end of the spring (211) is fixedly connected to the outer side of the slider (209).

6. The auxiliary device for arteriovenous fistula puncture according to claim 1, characterized in that, The movable block (213) is slidably connected inside the adjusting housing (201), and the second connecting rod (210) is slidably connected inside the adjusting housing (201). The movement direction of the movable block (213) on the second connecting rod (210) is perpendicular to the movement direction of the movable block (213) on the adjusting housing (201).

7. The auxiliary device for arteriovenous fistula puncture according to claim 2, characterized in that, One end of the torsion spring (303) is fixedly connected to the outside of the pressing plate (301), and the other end of the torsion spring (303) is fixedly connected to the inside of the arc-shaped patch (302). The two arc-shaped patches (302) are arranged symmetrically.

8. The auxiliary device for arteriovenous fistula puncture according to claim 7, characterized in that, The pressing plate (301) is located directly below the adjusting housing (201). The movement direction of the second connecting rod (210) is the same as the movement direction of the slider (209). The movement direction of the pressing plate (301) is the same as the movement direction of the second connecting rod (210).

9. The auxiliary device for arteriovenous fistula puncture according to claim 3, characterized in that, The second anti-slip layer (404) is fixedly connected to the side of the sliding band (403) away from the connecting arm ring (401), the sliding patch (405) is fixedly connected to the side close to the connecting arm ring (401), the sliding band (403) is slidably connected to the inside of the connecting arm ring (401), and the sliding patch (405) is slidably connected to the inside of the connecting arm ring (401).

10. The method of using an auxiliary device for arteriovenous fistula puncture, characterized in that, Using the arteriovenous fistula puncture auxiliary device according to any one of claims 1-9 includes the following steps: First, fix the first arm ring (1) and the fixing mechanism (4) on the upper and lower sides of the arm puncture position. Adjust the pressing and pulling mechanism (3) through the adjusting mechanism (2) to fix the blood vessel for easy puncture. Turn the knob (202) to drive the internally sliding rotating rod (205) to rotate, thereby driving the first connecting rod (208) fixedly connected to the outside of the rotating rod (205) to rotate together. The rotation of the first connecting rod (208) will cause the inner rotating connected slider (209) to slide inside the arc groove (212), so that the slider (209) will continuously compress the spring (211) inside the arc groove (212). At the same time, the slider (209) will drive the outer rotating connected second connecting rod (210) to move together. Since the moving block (213) slidably connected inside the second connecting rod (210) slides inside the adjusting shell (201), the second connecting rod (210) will move in an arc trajectory with the slider (209) in a vertical state. The arc trajectory movement of the second connecting rod (210) will drive the bottom fixed connected pressing plate (301) to make the same movement. The movement of the pressure plate (301) along its arc-shaped trajectory will cause the rubber pad (304) fixedly connected at the bottom to press against the blood vessel to be punctured and pull it backward, thereby fixing the blood vessel to be punctured. At the same time, the arc-shaped patches (302) rotatably connected to both sides of the pressure plate (301) will remain in close contact with the skin of the arm under the tightened state of the torsion spring (303), so that the backward pulling of the pressure plate (301) will cause the first anti-slip layer (305) fixedly connected to the outer side of the arc-shaped patch (302) to pull the skin around the blood vessel backward together. Then push the knob (202) in the direction of the adjusting housing (201), so that the tooth block (203) fixedly connected to the outside of the knob (202) meshes with the tooth groove (204) opened on the inside of the adjusting housing (201) to restrict rotation. At the same time, the magnetic ring one (206) fixedly connected inside the knob (202) and the magnetic ring two (207) fixedly connected inside the adjusting housing (201) attract each other to fix the knob (202). The connecting arm ring (401) is fixed above the puncture site on the arm. Pulling the outer sliding ring (402) of the connecting arm ring (401) moves the sliding band (403). The sliding band (403) is always moved inside the connecting arm ring (401) through the outer fixed sliding patch (405). The skin is moved together through the second anti-slip layer (404) fixed to the outer side of the sliding band (403), so that the skin above the puncture site on the patient's arm can be pulled. The second anti-slip layer (404) and the first anti-slip layer (305) below the puncture site pull the skin of the puncture site in the opposite direction. When the puncture is completed, pull the knob (202) to disengage the tooth block (203) from the tooth groove (204). At this time, the spring (211) inside the arc groove (212) will drive the slider (209) to reset. At the same time, the slider (209) will drive the second connecting rod (210) to reset. The reset of the second connecting rod (210) will drive the pressing plate (301) to reset.

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