Auxiliary puncture device for dialysis puncture of internal arteriovenous fistula

Abstract

The invention discloses an auxiliary puncture device for dialysis puncture of internal arteriovenous fistula, and belongs to the technical field of auxiliary puncture instruments, the auxiliary puncture device comprises a supporting plate, four corners of the bottom of the inner wall of the supporting plate are provided with first elastic supporting pieces, and the same arc-shaped arm bracket is fixedly connected among the top ends of the four first elastic supporting pieces. Through downward movement of the arc-shaped arm bracket, the four rubber skin supporting pieces are indirectly driven to be clamped and connected to the skin around a point to be punctured in an abutting mode, the skin is automatically and obliquely diffused, moved and tightened in the transverse direction and the longitudinal direction, and the situation that the skin of the point to be punctured is loosened and collapses, and medical workers need to manually support the skin to conduct puncture operation is avoided; according to the automatic puncture device, the workload of medical staff is relieved, the puncture efficiency and precision are improved, the automation degree is high, the gravity of the arm of a patient is ingeniously utilized to drive the rubber skin supporting piece to be clamped and abut, the skin of the to-be-punctured point is automatically expanded, the medical staff does not need to manually expand the skin of the punctured point in the whole process, and time and labor are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary puncture instruments, and particularly to an auxiliary puncture device for arteriovenous fistula dialysis puncture. Background Art

[0002] The vascular fistula mainly refers to the arteriovenous fistula, which is an important vascular access for hemodialysis patients. The arteriovenous fistula is formed by surgically connecting the patient's artery and vein to form an artificial vascular shunt, so that there is enough blood flow for extracorporeal circulation during hemodialysis. The duration of hemodialysis varies from person to person, generally adjusted by doctors according to the patient's physical condition, but usually 3.5 - 5 hours each time.

[0003] Currently, when performing arteriovenous fistula dialysis puncture on patients, in order to improve the accuracy of the needle insertion position, angle, depth, and direction, an auxiliary puncture device is often used to tighten and straighten the skin at the puncture site on the patient's arm (especially for patients with severe skin relaxation), improving the stability of the skin at the puncture site to prevent the loose skin from shifting during the puncture process and affecting the accuracy of the needle insertion.

[0004] For example, the Chinese invention patent with the application number 202411058647.X discloses an auxiliary puncture device for arteriovenous fistula of hemodialysis patients, including a support plate, a puncture point fixing part, a puncture guiding part, and a compression hemostasis part. The support plate is arranged on the patient's upper limb, the puncture point fixing part is arranged on the support plate, the puncture point fixing part can controllably tension the skin at the puncture point and fix the blood vessel at the puncture point, the puncture guiding part is arranged on the support plate, and the angle and depth of the puncture needle can be adjusted through the puncture guiding part; the compression hemostasis part is arranged on the support plate, and the compression hemostatic belt in the compression hemostasis part compresses and stops bleeding at the puncture point, and the compression force can be adjusted. Advantages: using the support plate to fix the patient's upper limb, using the puncture point fixing part to tension the skin at the puncture site of the patient and fix the puncture blood vessel, using the puncture guiding part to adjust the angle and depth of the puncture, applicable to various puncture methods, with strong versatility, using the compression hemostatic belt to compress and stop bleeding at the puncture point after puncture, avoiding manual long-term pressing, and being convenient to use and improving the patient's comfort.

[0005] The above patent can stretch and straighten the skin of the patient's arm at the puncture point to fix the blood vessel through the setting of the puncture point fixing part, but due to the complex structure of the puncture point fixing part and the closed-loop space formed with the support plate, the patient's arm is located in the closed-loop space. After the puncture is completed, since there is a puncture needle punctured on the patient's arm and the puncture needle is connected to the hemodialysis equipment through a pipeline, it is difficult for the patient's arm to be smoothly withdrawn from the closed-loop space between the puncture point fixing part and the support plate, resulting in the patient's arm being tied with a bulky auxiliary puncture device during the entire 3.5-5 hours of hemodialysis, which is not conducive to the patient's arm. Small movements and activities, which can easily cause discomfort to the patient's arm; even if the patient can barely withdraw his arm from the auxiliary puncture device, due to the long withdrawal stroke and the large number of obstructions, it is very easy for the puncture needle or the pipeline to accidentally touch other objects, and the puncture needle may loosen and fall off, causing pain and discomfort at the puncture point of the patient's arm.

[0006] Therefore, it is necessary to provide an auxiliary puncture device for arteriovenous fistula dialysis puncture to solve the above technical problems. Summary of the invention

[0007] The object of the present invention is to provide an auxiliary puncture device for arteriovenous fistula dialysis puncture to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an auxiliary puncture device for arteriovenous fistula dialysis puncture, comprising a support plate, elastic support members 1 are arranged at the four corners of the bottom of the inner wall of the support plate, the tops of four groups of the elastic support members 1 are fixedly connected with the same arc-shaped arm bracket, the top of the support plate is provided with four device cavities, the elastic support members 2 inside the device cavity, the top of the elastic support members 2 is slidably connected with a wedge-shaped sliding platform, the top of the wedge-shaped sliding platform is rotatably connected with an arc-shaped arm 1 through a rotating shaft, the arc-shaped arm 2 is movably connected inside the arc-shaped arm 1, an arc spring is fixedly connected between the bottom end of the arc-shaped arm 2 and the bottom of the inner wall of the arc-shaped arm 1, and the bottom end of the arc-shaped arm 2 is fixedly connected with a pull rope, the top of the arc-shaped arm 2 is hingedly installed with an arc-shaped arm 3, and the other end of the arc-shaped arm 3 is fixedly connected with a rubber support leather piece, a torsion spring is fixedly connected between the arc-shaped arm 3 and the arc-shaped arm 2, and a wedge-shaped fixed platform is fixedly connected to the inner wall of the device cavity and located below the wedge-shaped sliding platform;

[0009] A connecting rod is hingedly mounted on one side of the arc-shaped arm close to the arc-shaped arm bracket;

[0010] A return spring is provided between the wedge-shaped sliding platform and the second elastic support member;

[0011] One end of the rotating shaft is fixedly connected with a movable limiting strip, one side of the wedge-shaped sliding table is fixedly connected with a fixed limiting strip, the rotating shaft is rotatably connected with the wedge-shaped sliding table, and the rubber skin support member is made of a rubber plate or a rubber ball;

[0012] During the process of placing the patient's arm on the arc-shaped arm bracket, the gravity of the patient's arm is used to drive the arc-shaped arm bracket to move downward, driving the four rubber skin support members to clamp and abut against the skin around the puncture point area, and automatically obliquely diffusing and moving the skin of the puncture point area along the horizontal and vertical directions to tighten it, playing a certain role in fixing the skin and blood vessels at the puncture point area, avoiding the need for medical staff to manually spread the loose skin at the puncture point area for puncture operations, reducing the burden on medical staff, improving the puncture efficiency and accuracy, and having a high degree of automation. It cleverly uses the gravity of the patient's arm to drive the rubber skin support members to clamp and abut and automatically spread the skin at the puncture point area, and there is no need for medical staff to manually spread the puncture point skin throughout the process, saving time and effort;

[0013] After the puncture is completed, the medical staff assists the patient to gently lift the arm to relieve the downward pressure of the patient's arm on the arc-shaped arm bracket. Thus, by the elastic force of the first elastic support member, the second elastic support member, the return spring and the torsion spring, the rubber skin support members are automatically driven to release the skin support operation on the patient's arm and reset, making the top of the auxiliary puncture device in an open state, so that the patient's arm can be easily removed from the auxiliary puncture device, and it is not easy to accidentally touch the puncture needle or pipeline with other objects, which is beneficial to ensuring the stability of the puncture needle.

[0014] As a further description of the above technical solution: The end of the connecting rod far from the first arc-shaped arm is slidably and hingedly arranged with the arc-shaped arm bracket. The connecting rod is slidably and hingedly connected with the arc-shaped arm bracket in a way that a slide rail and a slider are used in cooperation. The slide rail is fixedly connected with the arc-shaped arm bracket, the slider is slidably installed inside the slide rail, and the connecting rod is hinged with the slider to achieve the sliding connection between the connecting rod and the arc-shaped arm bracket.

[0015] As a further description of the above technical solution: The end of the pull rope far from the second arc-shaped arm movably passes through the bottom end of the first arc-shaped arm and is fixedly connected with the inner wall of the device cavity.

[0016] As a further description of the above technical solution: The first elastic support member includes a first telescopic rod and a first support spring fixedly installed at the bottom of the inner wall of the support plate. The tops of the first telescopic rod and the first support spring are both fixedly connected with the bottom of the arc-shaped arm bracket, and the first support spring is sleeved on the outer surface of the first telescopic rod.

[0017] As a further description of the above technical solution: The second elastic support member includes a second telescopic rod and a second support spring fixedly installed at the bottom of the inner wall of the device cavity. A same U-shaped support platform is fixedly connected between the tops of the second telescopic rod and the second support spring.

[0018] As a further description of the above technical solution: The wedge-shaped sliding table is slidably installed inside the U-shaped support table, and one end of the return spring away from the wedge-shaped sliding table is fixedly connected to the inner wall of the U-shaped support table.

[0019] As a further description of the above technical solution: Needle insertion reference mechanisms are arranged on both the front and back of the support plate. Through the arrangement of the needle insertion reference mechanisms, it can provide reference for medical staff when performing puncture operations on the patient's arm, so as to improve the accuracy of needle insertion.

[0020] As a further description of the above technical solution: The needle insertion reference mechanism includes a support frame fixedly installed on the support plate. A threaded rod and a guide rod are movably penetrated through the top of the support frame, and an adjustment block is rotatably connected to the bottom of the support frame. The adjustment block is threadedly sleeved on the outer surface of the threaded rod. A limiting block is fixedly connected between the bottom ends of the threaded rod and the guide rod, and a fixing frame is fixedly connected between the top ends of the threaded rod and the guide rod. A reference plate is rotatably connected inside the fixing frame. Clamping components are embedded on both the front and back of the reference plate. A plurality of clamping holes are formed on both the front and back inner walls of the fixing frame. The clamping components and the clamping holes are used in cooperation to clamp and fix the reference plate.

[0021] As a further description of the above technical solution: An angle scale is arranged on the front of the fixing frame, and a scale is arranged on the top of the reference plate.

[0022] As a further description of the above technical solution: The clamping component includes a clamping spring fixedly installed on the reference plate. The other end of the clamping spring is fixedly connected to a clamping column. The end of the clamping column away from the clamping spring is hemispherical, and the clamping column is movably embedded in the corresponding clamping hole.

[0023] The present invention has the following beneficial effects:

[0024] 1. During the process of placing the patient's arm on the arc-shaped arm bracket, the gravity of the patient's arm is utilized to drive the arc-shaped arm bracket to move downward, driving the four rubber skin-supporting parts to clamp and abut against the skin around the puncture point, and automatically obliquely spread and move the skin at the puncture point along the horizontal and vertical directions to tighten it, playing a certain role in fixing the skin and blood vessels at the puncture point, avoiding the loose skin at the puncture point and the need for medical staff to manually spread it for puncture operations, reducing the burden on medical staff, improving the puncture efficiency and accuracy, and having a high degree of automation. It cleverly utilizes the gravity of the patient's arm to drive the clamping and abutting of the rubber skin-supporting parts and automatically spread the skin at the puncture point, and the whole process does not require medical staff to manually spread the puncture point skin, saving time and effort.

[0025] 2. After the puncture is completed, the medical staff assist the patient to gently lift the arm to relieve the downward pressure of the patient's arm on the arc-shaped arm bracket. Thus, by the elastic force of the first elastic support member, the second elastic support member, the return spring and the torsion spring, the rubber skin-supporting member is automatically driven to release the skin-supporting operation on the patient's arm and reset, making the top of the auxiliary puncture device in an open state. Then, the patient's arm can be easily removed from the auxiliary puncture device, and it is not easy to accidentally touch the puncture needle or pipeline with other objects, which is beneficial to ensuring the stability of the puncture needle.

[0026] 3. The setting of the reference plate facilitates the medical staff to refer to the needle insertion angle during the subsequent puncture operation on the patient, which is beneficial to improving the accuracy of the needle insertion angle. Through the setting of the scale, it is convenient for the medical staff to refer to the needle insertion depth and improve the accuracy of the needle insertion depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. is a three-dimensional schematic diagram of the overall structure of an auxiliary puncture device for arteriovenous fistula dialysis puncture proposed by the present invention;

[0028] Figure 2 FIG. is a three-dimensional schematic diagram of the overall structure of an auxiliary puncture device for arteriovenous fistula dialysis puncture proposed by the present invention from another angle;

[0029] Figure 3 FIG. is a schematic diagram of the internal structure of the support plate of an auxiliary puncture device for arteriovenous fistula dialysis puncture proposed by the present invention;

[0030] Figure 4 FIG. is a three-dimensional schematic diagram of the second elastic support member and the wedge-shaped sliding table and other structures of an auxiliary puncture device for arteriovenous fistula dialysis puncture proposed by the present invention;

[0031] Figure 5 FIG. is a three-dimensional schematic diagram of the wedge-shaped sliding table and the return spring and other structures of an auxiliary puncture device for arteriovenous fistula dialysis puncture proposed by the present invention;

[0032] Figure 6 FIG. is a three-dimensional schematic diagram of the wedge-shaped sliding table and the first arc-shaped arm and other structures of an auxiliary puncture device for arteriovenous fistula dialysis puncture proposed by the present invention;

[0033] Figure 7 FIG. is a schematic diagram of the internal structure of the first arc-shaped arm of an auxiliary puncture device for arteriovenous fistula dialysis puncture proposed by the present invention;

[0034] Figure 8 FIG. is a three-dimensional schematic diagram of the second arc-shaped arm and the third arc-shaped arm and other structures of an auxiliary puncture device for arteriovenous fistula dialysis puncture proposed by the present invention;

[0035] Figure 9Schematic diagram of the needle insertion reference mechanism of an auxiliary puncture device for arteriovenous fistula dialysis proposed by the present invention;

[0036] Figure 10 Longitudinal sectional view of the fixing frame and the reference plate of an auxiliary puncture device for arteriovenous fistula dialysis proposed by the present invention;

[0037] Figure 11 Schematic diagram of the usage state of an auxiliary puncture device for arteriovenous fistula dialysis proposed by the present invention.

[0038] In the figure: 1, support plate; 201, first telescopic rod; 202, first support spring; 3, arc-shaped arm bracket; 401, second telescopic rod; 402, second support spring; 403, U-shaped support platform; 5, device cavity; 6, wedge-shaped sliding table; 7, first arc-shaped arm; 8, second arc-shaped arm; 9, arc-shaped spring; 10, pull rope; 11, third arc-shaped arm; 12, rubber support piece; 13, torsion spring; 14, wedge-shaped fixing platform; 15, connecting rod; 16, return spring; 1701, support frame; 1702, threaded rod; 1703, guide rod; 1704, adjusting block; 1705, limiting block; 1706, fixing frame; 1707, reference plate; 17081, clamping spring; 17082, clamping column; 1709, clamping hole; 1710, angle scale; 1711, scale; 18, rotating shaft; 19, movable limiting strip; 20, fixed limiting strip. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] As shown in the attached Figure 1 to the attached Figure 11 figures:

[0041] Embodiment 1: The present invention provides an auxiliary puncture device for arteriovenous fistula dialysis puncture, including a support plate 1. Elastic support members I are provided at the four corners of the bottom of the inner wall of the support plate 1. The same arc-shaped arm bracket 3 is fixedly connected between the tops of the four groups of elastic support members I. Four device cavities 5 are provided on the top of the support plate 1. Elastic support members II are provided inside the device cavities 5. A wedge-shaped sliding table 6 is slidably connected to the top of the elastic support member II. A return spring 16 is provided between the wedge-shaped sliding table 6 and the elastic support member II. The top of the wedge-shaped sliding table 6 is rotatably connected to an arc-shaped arm I 7 through a rotating shaft 18. An arc-shaped arm II 8 is movably connected inside the arc-shaped arm I 7. An arc-shaped spring 9 is fixedly connected between the bottom end of the arc-shaped arm II 8 and the bottom of the inner wall of the arc-shaped arm I 7. And a pull rope 10 is fixedly connected to the bottom end of the arc-shaped arm II 8. The other end of the pull rope 10 movably penetrates through the bottom end of the arc-shaped arm I 7 and is fixedly connected to the inner wall of the device cavity 5. The top end of the arc-shaped arm II 8 is hingedly installed with an arc-shaped arm III 11. And a rubber skin support member 12 is fixedly connected to the other end of the arc-shaped arm III 11. A torsion spring 13 is fixedly connected between the arc-shaped arm III 11 and the arc-shaped arm II 8. A wedge-shaped fixed table 14 is fixedly connected to the inner wall of the device cavity 5 and below the wedge-shaped sliding table 6. One side of the arc-shaped arm I 7 close to the arc-shaped arm bracket 3 is hingedly installed with a connecting rod 15. The other end of the connecting rod 15 is slidably and hingedly arranged with the arc-shaped arm bracket 3;

[0042] During the process of placing the patient's arm on the arc-shaped arm bracket 3, the gravity of the patient's arm is used to drive the arc-shaped arm bracket 3 to move downward, driving the four rubber skin support members 12 to clamp and abut against the skin around the puncture point area, and automatically obliquely diffusing and moving and tightening the skin of the puncture point area along the horizontal and vertical directions, playing a certain role in fixing the skin and blood vessels at the puncture point area, avoiding the loose skin at the puncture point area and the need for medical staff to manually spread it for puncture operation, reducing the burden on medical staff, improving the puncture efficiency and accuracy, and having a high degree of automation. The gravity of the patient's arm is cleverly used to drive the clamping and abutting of the rubber skin support member 12 and automatically spread the skin at the puncture point area. The whole process does not require medical staff to manually spread the puncture point skin, saving time and effort;

[0043] After the puncture is completed, the medical staff assists the patient to gently lift the arm to relieve the downward pressure of the patient's arm on the arc-shaped arm bracket 3. Thus, by the elastic force of the elastic support member I, the elastic support member II, the return spring 16 and the torsion spring 13, the rubber skin support member 12 is automatically driven to release the skin support operation on the patient's arm and reset, making the top of the auxiliary puncture device in an open state. Then, the patient's arm can be easily removed from the auxiliary puncture device, and it is not easy to accidentally touch the puncture needle or pipeline with other objects, which is beneficial to ensuring the stability of the puncture needle.

[0044] The front and back of the support plate 1 are both provided with a needle insertion reference mechanism. Through the setting of the needle insertion reference mechanism, it can provide a reference for the doctor when inserting the puncture needle into the patient's arm, so that the doctor can more accurately insert the puncture needle into the patient's arm blood vessel.

[0045] The first elastic support member includes a first telescopic rod 201 fixedly installed at the bottom of the inner wall of the support plate 1 and a first support spring 202. The tops of the first telescopic rod 201 and the first support spring 202 are both fixedly connected to the bottom of the arc-shaped arm bracket 3, and the first support spring 202 is sleeved on the outer surface of the first telescopic rod 201. The first elastic support member is used to elastically support the arc-shaped arm bracket 3.

[0046] The second elastic support member includes a second telescopic rod 401 fixedly installed at the bottom of the inner wall of the device cavity 5 and a second support spring 402. A same U-shaped support platform 403 is fixedly connected between the tops of the second telescopic rod 401 and the second support spring 402. The wedge-shaped sliding platform 6 is slidably installed inside the U-shaped support platform 403. One end of the return spring 16 far from the wedge-shaped sliding platform 6 is fixedly connected to the inner wall of the U-shaped support platform 403. The second elastic support member is used to elastically support the wedge-shaped sliding platform 6. The elastic force of the first support spring 202 is less than the elastic force of the second support spring 402, and the elastic force of the second support spring 402 is the same as the elastic force of the return spring 16.

[0047] Working principle: When a patient needs hemodialysis, after the doctor arranges the patient to enter the dialysis room, the patient lies on the bed and places the arm flat on both sides of the body. Then the medical staff places the auxiliary puncture device flat on the hospital bed, and makes the length direction of the auxiliary puncture device close to parallel with the patient's body and close to the non-dominant arm of the patient. Then the medical staff tells the patient to lift the arm to be punctured and place it on the top of the arc-shaped arm bracket 3, and make the puncture point of the arm located between the four rubber skin-supporting members 12, that is, the puncture point is opposite to the needle insertion reference mechanism. During the process of placing the arm, if the patient is physically weak or difficult to place independently, it can be assisted by the medical staff.

[0048] After the patient's arm is placed on the arc-shaped arm bracket 3, the weight of the patient's arm will provide a downward pressure on the arc-shaped arm bracket 3, thereby pressing the arc-shaped arm bracket 3 to overcome the elastic force of the support spring one 202 and move downward. When the arc-shaped arm bracket 3 moves downward, it pulls the first arc-shaped arm 7, the second arc-shaped arm 8, the third arc-shaped arm 11, and the rubber supporting leather piece 12 to rotate synchronously towards the side close to the patient's arm through the connecting rod 15. When some of the rubber supporting leather pieces 12 rotate to abut against the patient's arm, the arc-shaped arm bracket 3 continues to move downward, indirectly driving the first arc-shaped arm 7 and the second arc-shaped arm 8 to continue rotating. At this time, the rubber supporting leather piece 12 restricted by the patient's arm remains in contact with the patient's arm, and the third arc-shaped arm 11 fixedly connected to the rubber supporting leather piece 12 rotates relative to the second arc-shaped arm 8, and the elastic force of the torsion spring 13 is used to make the rubber supporting leather piece 12 closely adhere to the patient's arm. During this process, the rubber supporting leather pieces 12 that are not in contact with the patient's arm rotate along with the corresponding first arc-shaped arm 7, second arc-shaped arm 8, and third arc-shaped arm 11 until all four rubber supporting leather pieces 12 are in contact with the patient's arm. The arc-shaped arm bracket 3 continues to move downward, so that under the elastic force of the torsion spring 13, all four rubber supporting leather pieces 12 elastically abut against the periphery of the puncture point on the patient's arm. By elastically abutting the rubber supporting leather pieces 12 against the patient's arm, it can adapt to the thickness of different positions of different patients' arms and improve the applicability of the auxiliary puncture device;

[0049] After the four rubber supporting leather pieces 12 elastically abut against the periphery of the puncture point on the patient's arm, the arc-shaped arm bracket 3 continues to move downward under the gravity of the patient's arm until the rotating shaft 18 rotates to drive the movable limiting strip 19 to rotate until it abuts against the fixed limiting strip 20 to limit the first arc-shaped arm 7. At this time, the wedge-shaped sliding table 6 just abuts against the wedge-shaped fixed table 14;

[0050] Subsequently, the arc-shaped arm bracket 3 continues to move downward. The first arc-shaped arm 7 can no longer rotate relative to the wedge-shaped sliding table 6, and the downward movement of the arc-shaped arm bracket 3 drives the wedge-shaped sliding table 6 to move downward synchronously. That is, the patient's arm, the arc-shaped arm bracket 3, the wedge-shaped sliding table 6, and the rubber skin-supporting pieces 12 that abut around the puncture point on the patient's arm move downward synchronously. During this process, due to the action of the pulling rope 10 fixedly connected between the bottom end of the second arc-shaped arm 8 and the inner wall of the device cavity 5, the pulling rope 10 pulls the second arc-shaped arm 8 to contract inward toward the first arc-shaped arm 7 and compress the arc-shaped spring 9. While the second arc-shaped arm 8 contracts, it drives the rubber skin-supporting pieces 12 to move toward the arc-shaped arm bracket 3 through the third arc-shaped arm 11. The four rubber skin-supporting pieces 12 pull the skin downward from both sides of the patient's arm, and under the guiding action of the wedge-shaped fixing table 14 on the wedge-shaped sliding table 6, the downward-moving wedge-shaped sliding table 6 moves away from the wedge-shaped fixing table 14 against the elastic force of the second support spring 402, so that the four rubber skin-supporting pieces 12 move obliquely downward. To achieve the process of placing the patient's arm on the arc-shaped arm bracket 3, the gravity of the patient's arm is used to drive the arc-shaped arm bracket 3 to move downward, driving the four rubber skin-supporting pieces 12 to clamp and abut against the skin around the puncture point, and automatically spreading and moving the skin at the puncture point obliquely along the horizontal and vertical directions to tighten it, playing a certain role in fixing the skin and blood vessels at the puncture point, avoiding the loose skin at the puncture point that requires manual spreading by medical staff for puncture operations, reducing the burden on medical staff, improving the puncture efficiency and accuracy, and having a high degree of automation. It cleverly uses the gravity of the patient's arm to drive the clamping and abutting of the rubber skin-supporting pieces 12 and automatically spread the skin at the puncture point, and the whole process does not require medical staff to manually spread the puncture point skin, saving time and effort;

[0051] Immediately afterwards, after the medical staff disinfect the puncture point where the skin is tightened, the next puncture operation can be carried out;

[0052] After the puncture is completed, the medical staff assist the patient to gently lift the arm to relieve the downward pressure of the patient's arm on the arc-shaped arm bracket 3. Thus, by the elastic force of the first elastic support member, the second elastic support member, the return spring 16 and the torsion spring 13, the rubber skin-supporting pieces 12 are automatically driven to release the skin-supporting operation on the patient's arm and reset, making the top of the auxiliary puncture device open, and the patient's arm can be easily removed from the auxiliary puncture device, and it is not easy to accidentally touch the puncture needle or pipeline with other objects, which is beneficial to ensuring the stability of the puncture needle.

[0053] Example 2: This example is basically the same as the previous one. The difference is that the needle insertion reference mechanism includes a support frame 1701 fixedly installed on the support plate 1. A threaded rod 1702 and a guide rod 1703 are movably installed through the top of the support frame 1701. The bottom of the support frame 1701 is rotatably connected to an adjustment block 1704. The adjustment block 1704 is threadedly sleeved on the outer surface of the threaded rod 1702. A limit block 1705 is fixedly connected between the bottom ends of the threaded rod 1702 and the guide rod 1703. A fixing frame 1706 is fixedly connected between the top ends of the threaded rod 1702 and the guide rod 1703. A reference plate 1707 is rotatably connected inside the fixing frame 1706. Clamping components are embedded on both the front and back of the reference plate 1707. A number of clamping holes 1709 are opened on both the front and back inner walls of the fixing frame 1706. The clamping components and the clamping holes 1709 are used in cooperation to clamp and fix the reference plate 1707. An angle scale 1710 is provided on the front of the fixing frame 1706. A scale 1711 is provided on the top of the reference plate 1707.

[0054] Selectively use one of the needle insertion reference mechanisms on the side away from the patient's body according to the different arms of the patient to be punctured. By screwing the adjustment block 1704, the threaded rod 1702 is limited by the cooperation of the guide rod 1703 and the limit block 1705, so that the threaded rod 1702 moves up and down, driving the fixing frame 1706 to lift and lower, and adjusting the height of the reference plate 1707. When the reference plate 1707 moves to an appropriate height, the medical staff then hold the reference plate 1707 and rotate it upward, and cooperate with the angle scale 1710 to adjust the reference plate 1707 to the angle corresponding to the subsequent puncture needle insertion angle. After the adjustment is completed, the adjusted reference plate 1707 is limited and fixed by the cooperation of the clamping components and the clamping holes 1709;

[0055] Through the setting of the reference plate 1707, it is convenient for medical staff to refer to the needle insertion angle during the subsequent puncture operation on the patient, which is beneficial to improving the accuracy of the puncture needle insertion angle. Through the setting of the scale 1711, it is convenient for medical staff to refer to the needle insertion depth and improve the accuracy of the needle insertion depth.

[0056] Example 3: This example is basically the same as the previous one. The difference is that the clamping component includes a clamping spring 17081 fixedly installed on the reference plate 1707. The other end of the clamping spring 17081 is fixedly connected to a clamping column 17082. The end of the clamping column 17082 away from the clamping spring 17081 is hemispherical, and the clamping column 17082 is movably embedded in the corresponding clamping hole 1709.

[0057] When adjusting the angle of the reference plate 1707, the medical staff bends the reference plate 1707 to rotate, and sets the clamping column 17082 to a hemispherical shape at one end close to the clamping hole 1709 so that when the reference plate 1707 is rotated, the clamping column 17082 can smoothly withdraw from the clamping hole 1709, and when the clamping column 17082 withdraws from the clamping hole 1709, the clamping spring 17081 is squeezed to be in a compressed state and store energy. When the adjustment of the reference plate 1707 is completed, the elastic force of the clamping spring 17081 pushes the clamping column 17082 to move into the corresponding clamping hole 1709, and the reference plate 1707 is clamped and fixed again.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary puncture device for arteriovenous fistula dialysis puncture, comprising a support plate (1), characterized in that: At the four corners of the bottom of the inner wall of the support plate (1), there are first elastic support members. A same arc-shaped arm bracket (3) is fixedly connected between the tops of the four first elastic support members. Four device cavities (5) are formed in the top of the support plate (1). A second elastic support member is arranged inside the device cavity (5). A wedge-shaped sliding table (6) is slidably connected to the top of the second elastic support member. An arc-shaped arm one (7) is rotatably connected to the top of the wedge-shaped sliding table (6) through a rotating shaft (18). An arc-shaped arm two (8) is movably connected inside the arc-shaped arm one (7). An arc-shaped spring (9) is fixedly connected between the bottom end of the arc-shaped arm two (8) and the bottom of the inner wall of the arc-shaped arm one (7). And a pull rope (10) is fixedly connected to the bottom end of the arc-shaped arm two (8). The top end of the arc-shaped arm two (8) is hingedly installed with an arc-shaped arm three (11). And the other end of the arc-shaped arm three (11) is fixedly connected with a rubber support leather member (12). A torsion spring (13) is fixedly connected between the arc-shaped arm three (11) and the arc-shaped arm two (8). A wedge-shaped fixed table (14) is fixedly connected to the inner wall of the device cavity (5) and below the wedge-shaped sliding table (6). A connecting rod (15) is hingedly installed on one side of the arc-shaped arm one (7) close to the arc-shaped arm bracket (3). A return spring (16) is arranged between the wedge-shaped sliding table (6) and the second elastic support member. One end of the rotating shaft (18) is fixedly connected with a movable limiting strip (19). A fixed limiting strip (20) is fixedly connected to one side of the wedge-shaped sliding table (6).

2. The auxiliary puncture device for arteriovenous fistula dialysis puncture according to claim 1, characterized in that: The end of the connecting rod (15) far from the arc-shaped arm one (7) is slidably hinged to the arc-shaped arm bracket (3).

3. The auxiliary puncture device for arteriovenous fistula dialysis puncture according to claim 1, characterized in that: The end of the pull rope (10) far from the arc-shaped arm two (8) movably penetrates through the bottom end of the arc-shaped arm one (7) and is fixedly connected to the inner wall of the device cavity (5).

4. The auxiliary puncture device for arteriovenous fistula dialysis puncture according to claim 1, wherein: The first elastic support member includes a first telescopic rod (201) fixedly installed at the bottom of the inner wall of the support plate (1) and a first support spring (202). The tops of the first telescopic rod (201) and the first support spring (202) are both fixedly connected to the bottom of the arc-shaped arm bracket (3). And the first support spring (202) is sleeved on the outer surface of the first telescopic rod (201).

5. An auxiliary puncture device for arteriovenous fistula dialysis puncture according to claim 1, characterized in that: The second elastic support member includes a second telescopic rod (401) fixedly installed at the bottom of the inner wall of the device cavity (5) and a second support spring (402). A same U-shaped support table (403) is fixedly connected between the tops of the second telescopic rod (401) and the second support spring (402).

6. The auxiliary puncture device for arteriovenous fistula dialysis puncture according to claim 1, characterized in that: The wedge-shaped sliding table (6) is slidably installed inside the U-shaped support table (403). The end of the return spring (16) far from the wedge-shaped sliding table (6) is fixedly connected to the inner wall of the U-shaped support table (403).

7. An auxiliary puncture device for arteriovenous fistula dialysis puncture according to claim 1, characterized in that: Needle insertion reference mechanisms are arranged on both the front and back of the support plate (1).

8. An auxiliary puncture device for arteriovenous fistula dialysis puncture according to claim 7, characterized in that: The needle insertion reference mechanism includes a support frame (1701) fixedly installed on the support plate (1). A threaded rod (1702) and a guide rod (1703) are movably installed through the top of the support frame (1701). The bottom of the support frame (1701) is rotatably connected to an adjustment block (1704). The adjustment block (1704) is threadedly sleeved on the outer surface of the threaded rod (1702). A limit block (1705) is fixedly connected between the bottom ends of the threaded rod (1702) and the guide rod (1703). A fixing frame (1706) is fixedly connected between the top ends of the threaded rod (1702) and the guide rod (1703). A reference plate (1707) is rotatably connected inside the fixing frame (1706). Clamping components are embedded on the front and back surfaces of the reference plate (1707). A number of clamping holes (1709) are formed on the front and back inner walls of the fixing frame (1706). The clamping components and the clamping holes (1709) are used in cooperation to clamp and fix the reference plate (1707).

9. The auxiliary puncture device for arteriovenous fistula dialysis puncture according to claim 8, wherein: An angle scale (1710) is arranged on the front surface of the fixing frame (1706). A scale (1711) is arranged on the top of the reference plate (1707).

10. An auxiliary puncture device for arteriovenous fistula dialysis puncture according to claim 8, characterized in that: The clamping component includes a clamping spring (17081) fixedly installed on the reference plate (1707). The other end of the clamping spring (17081) is fixedly connected to a clamping post (17082).

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