An ultrasonic apparatus fixing device for internal fistula puncture

Abstract

The utility model relates to an ultrasonic appearance fixing device for internal fistula puncture, the ultrasonic appearance fixing device includes adjustable support frame, the adjustable support frame includes fixed part and adjusting portion that link up in proper order, the ultrasonic appearance clamping mechanism for clamping ultrasonic appearance, the ball hinge mechanism connection is passed between the ultrasonic appearance clamping mechanism and the adjusting portion of adjustable support frame, the angle adjusting mechanism for adjusting internal fistula puncture needle entry angle, the angle adjusting mechanism installs on ultrasonic appearance clamping mechanism, the needle entry auxiliary mechanism of detachable is located on the angle adjusting mechanism, the needle entry auxiliary mechanism includes the sliding piece of the arc needle entry groove on the sliding piece and being arranged along the angle adjusting mechanism, compared with prior art, the ultrasonic appearance fixing device of the utility model can firmly hold ultrasonic appearance, and the operation efficiency of internal fistula puncture is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary device technology, and in particular to an ultrasonic fixation device for arteriovenous fistula puncture. Background Technology

[0002] With the increasing incidence of chronic kidney disease, the number of patients receiving hemodialysis is also rising. Arteriovenous fistulas (AVFs), as a crucial pathway in hemodialysis, are key to maintaining long-term dialysis. However, with the aging of the patient population and the prevalence of underlying conditions such as diabetes and hypertension, many patients have poor vascular conditions, such as thin, hardened, inelastic, or deeply located vessels. These factors pose significant challenges to traditional experience-based puncture techniques. Medical staff often struggle to accurately locate blood vessels through palpation and visual observation alone, leading to a high failure rate and potentially causing complications such as hematoma and pseudoaneurysms, severely impacting dialysis effectiveness and quality of life.

[0003] To improve puncture success rates and reduce patient discomfort, ultrasound-guided arteriovenous fistula (AVF) puncture techniques have been increasingly introduced into clinical practice. Ultrasound can display the location, direction, depth, and blood flow of blood vessels in real time, providing medical staff with intuitive imaging support, thereby significantly improving the accuracy and safety of the puncture. However, despite the clear advantages of ultrasound-guided technology, several challenges remain in practical operation. First, the ultrasound probe needs to be held by the medical staff, and hand tremors or patient movement during the puncture can easily lead to blurred images, affecting puncture accuracy. Second, the puncture needle may deviate from the center point when entering the blood vessel, increasing the risk of puncture failure. These problems not only reduce operational efficiency but may also cause additional harm to the patient.

[0004] Therefore, optimizing ultrasound-guided puncture techniques and improving operational convenience and success rate for patients with poor vascular conditions has become an urgent problem to be solved in the field of hemodialysis treatment. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing ultrasound-guided puncture methods, such as inconvenience in hand operation and difficulty in puncture, and to provide an ultrasound fixation device for arteriovenous fistula puncture.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] An ultrasound fixation device for arteriovenous fistula puncture, the ultrasound fixation device comprising:

[0008] An adjustable support frame; the adjustable support frame includes a fixed part and an adjusting part connected together;

[0009] An ultrasonic instrument clamping mechanism for holding an ultrasonic instrument; the ultrasonic instrument clamping mechanism is connected to the adjusting part of the adjustable support frame via a ball joint mechanism;

[0010] An angle adjustment mechanism for adjusting the angle of needle insertion for fistula puncture; the angle adjustment mechanism is mounted on the ultrasonic instrument clamping mechanism;

[0011] A needle insertion auxiliary mechanism is detachably mounted on the angle adjustment mechanism; the needle insertion auxiliary mechanism includes a sliding member that can slide along the angle adjustment mechanism and an arc-shaped needle insertion groove provided on the sliding member.

[0012] Furthermore, the fixing part includes a fixing plate and a fixing knob.

[0013] Furthermore, the fixing plate is in the shape of an inverted C, and the top of the fixing plate is connected to the adjustment part of the adjustable support frame.

[0014] Furthermore, the fixing knob is threaded into one side plate of the fixing plate to clamp and fix the fixing plate.

[0015] Furthermore, the adjusting part includes a first adjusting rod and a second adjusting rod. The first adjusting rod is hingedly connected to a first hinge seat provided on the fixing part. One end of the second adjusting rod is hingedly connected to the first adjusting rod through a second hinge seat, and the other end is provided with a third hinge seat for connecting the ultrasonic instrument clamping mechanism.

[0016] Furthermore, a display support mechanism for supporting the display screen is movably provided on the outer wall of the second hinge seat.

[0017] Furthermore, the ultrasonic instrument clamping mechanism includes a first clamping plate and a second clamping plate, and a clamping space for clamping the ultrasonic instrument is formed between the first clamping plate and the second clamping plate.

[0018] Furthermore, the second clamping plate is provided with at least one telescopic rod, the movable end of which can extend into the interior of the first clamping plate and is connected to the interior of the first clamping plate by a telescopic spring.

[0019] Furthermore, the ball joint mechanism includes a ball joint housing disposed on the ultrasonic instrument clamping mechanism, a ball head rotatably disposed within the ball joint housing, a ball joint locking member threadedly engaged with the ball joint housing, and a connecting rod connected to the ball head.

[0020] Furthermore, the connecting rod is movably connected to the adjusting part of the adjustable support frame.

[0021] Furthermore, the angle adjustment mechanism includes a mounting plate connected to the ultrasonic instrument clamping mechanism and an arc-shaped plate connected to the mounting plate.

[0022] Furthermore, the arc-shaped plate is provided with a guide groove and an auxiliary guide groove arranged concentrically with the guide groove.

[0023] Furthermore, the sliding member is provided with a first guide post that can slide on the guide groove and a second guide post that can slide on the auxiliary guide groove; the end of the first guide post that passes through the guide groove is threadedly connected to a locking member.

[0024] Furthermore, the curved plate has angle scale lines on the edge that fits the top, and the slider has an angle indicator for indicating the corresponding scale.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The ultrasound device fixing device of this utility model can stably fix the ultrasound device through the adjustable support frame and the ultrasound device clamping mechanism, freeing the hands of medical staff and allowing them to focus on the puncture operation; and through the ball joint mechanism, the ultrasound device can be rotated at multiple angles, which makes it convenient for medical staff to adjust the ultrasound probe according to the patient's position and puncture site, thereby improving the accuracy of puncture positioning; through the angle adjustment mechanism, the needle insertion angle of the fistula puncture can be adjusted and the needle insertion auxiliary mechanism can provide guidance for the puncture needle, thereby improving the success rate and safety of fistula puncture.

[0027] (2) The ultrasound device fixing device of this utility model can be manually adjusted and the fixing plate can be clamped in the handrail, railing or other positions to prevent the device from shifting or loosening during the puncture. It can also achieve multi-angle adjustment through the adjusting rod and hinge seat, thereby driving the ultrasound device clamping mechanism to move in multiple dimensions in space to meet the needs of different patient positions, puncture sites and operating habits.

[0028] (3) The ball joint mechanism of this utility model can realize multi-angle adjustment of the ultrasonic instrument clamping mechanism, ensuring that the ultrasonic probe can be accurately aligned with the target area, obtain clear ultrasonic images, and improve the accuracy of puncture positioning.

[0029] (4) The ultrasonic instrument fixing device of this utility model can provide stable needle insertion guidance for the puncture needle through the cooperation of the angle adjustment mechanism and the needle insertion auxiliary mechanism, reducing the difficulty of operation. The device can also display the needle insertion angle to help nurses accurately control the puncture angle. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the ultrasonic instrument fixing device of this utility model.

[0031] Figure 2 This is a schematic diagram of the adjustable support frame of Embodiment 2 of this utility model.

[0032] Figure 3This is a schematic diagram of the ultrasonic instrument fixing device according to Embodiment 3 of this utility model.

[0033] Figure 4 This is a schematic diagram of the display screen support mechanism in Embodiment 3 of this utility model.

[0034] Figure 5 This is a schematic diagram of the ultrasonic instrument clamping mechanism and ball joint mechanism in Embodiment 4 of this utility model.

[0035] Figure 6 This is a schematic diagram of the needle insertion auxiliary mechanism in Embodiment 5 of this utility model.

[0036] Figure 7 This is an exploded view of the needle insertion auxiliary mechanism in Embodiment 5 of this utility model.

[0037] Explanation of markings in the diagram:

[0038] 1-Adjustable support frame, 11-Fixing part, 111-Fixing plate, 112-Fixing knob, 12-Adjusting part, 121-First adjusting rod, 122-Second adjusting rod, 123-First hinge seat, 124-Second hinge seat, 125-Third hinge seat, 126-Display screen support mechanism;

[0039] 2-Ultrasonic instrument clamping mechanism, 21-First clamping plate, 22-Second clamping plate, 23-Telescopic rod;

[0040] 3-Spherical hinge mechanism, 31-Spherical hinge housing, 32-Ball head, 33-Spherical hinge locking element, 34-Connecting rod;

[0041] 4-Angle adjustment mechanism, 41-Mounting plate, 42-Arc plate, 421-Angle scale line, 43-Guide groove, 44-Auxiliary guide groove;

[0042] 5-Needle insertion auxiliary mechanism, 51-Sliding component, 511-First guide post, 512-Second guide post, 513-Angle indicator, 52-Arc-shaped needle insertion groove, 53-Locking component;

[0043] 6-Ultrasound instrument;

[0044] 7- Display screen. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0046] In this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0048] Example 1:

[0049] This embodiment provides an ultrasound fixation device for arteriovenous fistula puncture, such as... Figure 1 As shown, the ultrasonic instrument fixing device specifically includes an adjustable support frame 1, an ultrasonic instrument clamping mechanism 2, a ball joint mechanism 3, an angle adjustment mechanism 4, and a needle insertion auxiliary mechanism 5.

[0050] The adjustable support frame 1 includes a fixed part 11 and an adjusting part 12 connected together. During fistula puncture, the fixed part 11 can be quickly installed on handrails, railings, or other locations to provide stable mechanical support for holding the ultrasound device 6. The ultrasound device clamping mechanism 2 is used to clamp the ultrasound device 6. It is connected to the adjusting part 12 of the adjustable support frame 1 via a ball joint mechanism 3. The flexible adjustment of the adjusting part 12 and the flexible rotation of the ball joint mechanism 3 allow the ultrasound device clamping mechanism 2 to rotate at multiple angles. The angle adjustment mechanism 4 is mounted on the ultrasound device clamping mechanism 2 and is used to adjust the needle insertion angle for fistula puncture. The needle insertion auxiliary mechanism 5 is detachably mounted on the angle adjustment mechanism 4. Specifically, it includes a sliding member 51 that can slide along the angle adjustment mechanism 4 and an arc-shaped needle insertion groove 52 provided on the sliding member 51.

[0051] In this embodiment, the ultrasound device fixation device, through the adjustable support frame 1 and the ultrasound device clamping mechanism 2, can stably fix the ultrasound device 6 to a handrail, railing, or other position, freeing the nurse's hands and allowing her to focus on the puncture operation, thus improving operational efficiency and accuracy. The ball joint mechanism 3 connects the ultrasound device clamping mechanism 2 and the adjustable support frame 1, enabling the ultrasound device 6 to rotate at multiple angles. This allows medical staff to adjust the position and angle of the ultrasound probe according to the patient's position and the puncture site, obtaining the optimal ultrasound image and improving the accuracy of puncture positioning. The angle adjustment mechanism 4 can adjust the needle insertion angle for arteriovenous fistula puncture. Combined with ultrasound image guidance, this effectively avoids damage to important tissues such as blood vessels and nerves during the puncture process. Furthermore, the needle insertion assist mechanism 5 provides guidance for the puncture needle, improving the success rate and safety of arteriovenous fistula puncture.

[0052] Example 2:

[0053] This embodiment provides an ultrasonic fixation device for arteriovenous fistula puncture. The ultrasonic fixation device specifically includes an adjustable support frame 1, an ultrasonic clamping mechanism 2, a ball joint mechanism 3, an angle adjustment mechanism 4, and a needle insertion auxiliary mechanism 5.

[0054] The difference from Embodiment 1 is that, in the adjustable support frame 1 of this embodiment, as shown in Example 1... Figure 2 As shown, the fixing part 11 specifically includes a fixing plate 111 and a fixing knob 112. The fixing plate 111 is inverted C-shaped, with a top plate and two opposing side plates. The inverted C-shaped design can better conform to the shape of the fixing object such as a handrail or railing, increasing the contact area and improving the fixing stability. The top of the fixing plate 111 is connected to the adjustment part 12 of the adjustable support frame 1. The fixing knob 112 is threadedly engaged with one side plate of the fixing plate 111, so that the handrail, railing, etc. are located between the fixing knob 112 and the other side plate, and is used to clamp and fix the fixing plate 111 in the position of the handrail, railing, etc. Through the threaded engagement, the tightness of the fixing knob 112 can be manually adjusted to firmly clamp the fixing plate 111 in the position of the handrail, railing, etc., preventing the device from shifting or loosening during puncture, ensuring the stability of the ultrasound image and the accuracy of the puncture operation.

[0055] The adjustment unit 12 in this embodiment specifically includes a first adjustment rod 121 and a second adjustment rod 122. The first adjustment rod 121 is hinged to a first hinge seat 123 provided on the fixed part 11. One end of the second adjustment rod 122 is hinged to the first adjustment rod 121 through a second hinge seat 124, and the other end is provided with a third hinge seat 125 for connecting the ultrasound clamping mechanism 2. The number of the first adjustment rod 121 and the second adjustment rod 122 can be flexibly adjusted according to specific strength requirements. Through the above-mentioned adjustment rods and hinge seats, multi-angle adjustment can be achieved, thereby driving the ultrasound clamping mechanism 2 to move in multiple dimensions in space, meeting the needs of different patient positions, puncture sites and operating habits, and improving the applicability and convenience of the device.

[0056] Example 3:

[0057] This embodiment provides an ultrasonic fixation device for arteriovenous fistula puncture. The ultrasonic fixation device specifically includes an adjustable support frame 1, an ultrasonic clamping mechanism 2, a ball joint mechanism 3, an angle adjustment mechanism 4, and a needle insertion auxiliary mechanism 5.

[0058] The difference from Embodiment 2 is that, in the adjustable support frame 1 of this embodiment, as shown in Example 2... Figure 3-4 As shown, a display support mechanism 126 for supporting the display screen 7 is also movably provided on the outer wall of the second hinge seat 124. The display support mechanism 126 can also be installed via the ball joint mechanism 3 to improve the rotational freedom of the display screen 7. The display screen 7 (such as a tablet computer) can display important information such as ultrasound images, patient information, and puncture path in real time, facilitating observation and analysis by nurses during puncture and improving the accuracy and efficiency of the operation. Integrating the display screen 7 into the adjustable support frame 1 can save operating table space. The display support mechanism 126 can provide stable support for the display screen 7, preventing the display screen 7 from shaking or shifting during puncture, ensuring the stability and clarity of the ultrasound image, and improving the accuracy of the puncture operation.

[0059] Example 4:

[0060] This embodiment provides an ultrasonic fixation device for arteriovenous fistula puncture. The ultrasonic fixation device specifically includes an adjustable support frame 1, an ultrasonic clamping mechanism 2, a ball joint mechanism 3, an angle adjustment mechanism 4, and a needle insertion auxiliary mechanism 5.

[0061] The difference from Example 1 is that, as Figure 5As shown, the ultrasound device clamping mechanism 2 of this embodiment includes a first clamping plate 21 and a second clamping plate 22, forming a clamping space for clamping the ultrasound device 5 between the first clamping plate 21 and the second clamping plate 22. The second clamping plate 22 is provided with at least one telescopic rod 23, the movable end of which can extend into the interior of the first clamping plate 21 and is connected to the interior of the first clamping plate 21 by a telescopic spring. The clamping space formed by the first clamping plate 21 and the second clamping plate 22 can accommodate ultrasound device 6 probes of different sizes, ensuring that the ultrasound device 6 is securely clamped and preventing shaking or displacement during puncture.

[0062] The ball joint mechanism 3 of this embodiment includes a ball joint housing 31 disposed on the ultrasound clamping mechanism 2, a ball head 32 rotatably disposed within the ball joint housing 31, a ball joint locking member 33 threadedly engaged with the ball joint housing 31, and a connecting rod 34 connected to the ball head 32. The connecting rod 34 is movably connected to the adjustment part 12 of the adjustable support frame 1, specifically hinged to the third hinge seat 125 at the end of the adjustment part 12. The ball head 32 can rotate freely within the ball joint housing 31, enabling the ultrasound clamping mechanism 2 to achieve multi-angle adjustment, including horizontal, vertical, and tilt adjustments. Nurses can flexibly adjust the angle and position of the ultrasound instrument 6 according to the patient's position and the needs of the puncture site, ensuring that the ultrasound probe can be accurately aligned with the target area, obtaining a clear ultrasound image, and improving the accuracy of puncture positioning. By rotating the ball joint locking member 33, the position of the ball head 32 can be fixed, preventing the ultrasound clamping mechanism 2 from accidentally moving or shaking during puncture, ensuring the stability of the ultrasound image and the accuracy of the puncture operation.

[0063] Example 5:

[0064] This embodiment provides an ultrasonic fixation device for arteriovenous fistula puncture. The ultrasonic fixation device specifically includes an adjustable support frame 1, an ultrasonic clamping mechanism 2, a ball joint mechanism 3, an angle adjustment mechanism 4, and a needle insertion auxiliary mechanism 5.

[0065] The difference from Example 1 is that, as Figure 6-7 As shown, the angle adjustment mechanism 4 in this embodiment includes a mounting plate 41 connected to the ultrasonic instrument clamping mechanism 2 and an arc-shaped plate 42 connected to the mounting plate 41. The arc-shaped plate 42 has a guide groove 43 and an auxiliary guide groove 44 concentrically arranged with the guide groove 43. The concentric design of the guide groove 43 and the auxiliary guide groove 44 allows the sliding member 51 to slide smoothly along the arc-shaped plate 42, ensuring precise adjustment of the needle insertion angle.

[0066] The needle insertion auxiliary mechanism 5 specifically includes a sliding member 51 that can slide along the angle adjustment mechanism 4 and an arc-shaped needle insertion groove 52 provided on the sliding member 51. The sliding member 51 is provided with a first guide post 511 that can slide on the guide groove 43 and a second guide post 512 that can slide on the auxiliary guide groove 44. The end of the first guide post 511 that passes through the guide groove 43 is threadedly connected to a locking member 53. By tightening the locking member 53, the sliding member 51 is locked and fixed to the angle adjustment mechanism 4. When it is necessary to adjust the position and angle of the needle insertion auxiliary mechanism 5, simply rotating the locking member 53 will release the lock, allowing the needle insertion auxiliary mechanism 5 to slide and adjust to the appropriate position on the angle adjustment mechanism 4. The sliding member 51, through the first guide post 511 and the second guide post 512, slides on the guide groove 43 and the auxiliary guide groove 44, providing stable needle insertion guidance and reducing operational difficulty. The detachable design of the sliding member 51 and the locking member 53 also facilitates the separate sterilization of the needle insertion auxiliary mechanism 5.

[0067] In this embodiment, the curved plate 42 is provided with an angle scale line 421 on the edge that fits the top, and the slider 51 is provided with an angle indicator 513 for indicating the corresponding scale. The cooperation of the angle scale line 421 and the angle indicator 513 can display the needle insertion angle and help the nurse to accurately control the puncture angle.

[0068] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. An ultrasonic fixation device for arteriovenous fistula puncture, characterized in that, include: Adjustable support frame (1); the adjustable support frame (1) includes a fixed part (11) and an adjusting part (12) connected together; An ultrasonic clamping mechanism (2) for clamping an ultrasonic instrument (6); the ultrasonic clamping mechanism (2) is connected to the adjustment part (12) of the adjustable support frame (1) via a ball joint mechanism (3); An angle adjustment mechanism (4) for adjusting the angle of needle insertion for fistula puncture; the angle adjustment mechanism (4) is mounted on the ultrasonic instrument clamping mechanism (2); A needle insertion auxiliary mechanism (5) is detachably mounted on the angle adjustment mechanism (4); the needle insertion auxiliary mechanism (5) includes a sliding member (51) that can slide along the angle adjustment mechanism (4) and an arc-shaped needle insertion groove (52) provided on the sliding member (51).

2. The ultrasonic fixation device for arteriovenous fistula puncture according to claim 1, characterized in that, The fixing part (11) includes a fixing plate (111) and a fixing knob (112); The fixing plate (111) is inverted C-shaped, and the top of the fixing plate (111) is connected to the adjustment part (12) of the adjustable support frame (1); the fixing knob (112) is threadedly engaged with one side plate of the fixing plate (111) to clamp and fix the fixing plate (111).

3. The ultrasonic fixation device for arteriovenous fistula puncture according to claim 1, characterized in that, The adjustment part (12) includes a first adjustment rod (121) and a second adjustment rod (122), wherein the first adjustment rod (121) is hinged to a first hinge seat (123) provided on the fixed part (11); One end of the second adjusting rod (122) is hinged to the first adjusting rod (121) through the second hinge seat (124), and the other end is provided with a third hinge seat (125) for connecting the ultrasonic instrument clamping mechanism (2).

4. The ultrasonic fixation device for arteriovenous fistula puncture according to claim 3, characterized in that, The outer wall of the second hinge seat (124) is movably provided with a display support mechanism (126) for supporting the display screen (7).

5. The ultrasonic fixation device for arteriovenous fistula puncture according to claim 1, characterized in that, The ultrasonic instrument clamping mechanism (2) includes a first clamping plate (21) and a second clamping plate (22), and a clamping space for clamping the ultrasonic instrument (6) is formed between the first clamping plate (21) and the second clamping plate (22).

6. The ultrasonic fixation device for arteriovenous fistula puncture according to claim 5, characterized in that, The second clamping plate (22) is provided with at least one telescopic rod (23), the movable end of which can extend into the interior of the first clamping plate (21) and is connected to the interior of the first clamping plate (21) by a telescopic spring.

7. The ultrasonic fixation device for arteriovenous fistula puncture according to claim 1, characterized in that, The ball joint mechanism (3) includes a ball joint housing (31) disposed on the ultrasonic instrument clamping mechanism (2), a ball head (32) rotatably disposed in the ball joint housing (31), a ball joint locking member (33) threadedly engaged with the ball joint housing (31), and a connecting rod (34) connected to the ball head (32). The connecting rod (34) is movably connected to the adjusting part (12) of the adjustable support frame (1).

8. The ultrasonic fixation device for arteriovenous fistula puncture according to claim 1, characterized in that, The angle adjustment mechanism (4) includes a mounting plate (41) connected to the ultrasonic instrument clamping mechanism (2) and an arc plate (42) connected to the mounting plate (41); The arc-shaped plate (42) is provided with a guide groove (43) and an auxiliary guide groove (44) concentrically arranged with the guide groove (43).

9. The ultrasonic fixation device for arteriovenous fistula puncture according to claim 8, characterized in that, The sliding member (51) is provided with a first guide post (511) that can slide on the guide groove (43) and a second guide post (512) that can slide on the auxiliary guide groove (44); the end of the first guide post (511) that passes through the guide groove (43) is threadedly connected to a locking member (53).

10. The ultrasonic fixation device for arteriovenous fistula puncture according to claim 8, characterized in that, The arc plate (42) has an angle scale line (421) on the edge of the top, and the slider (51) has an angle indicator (513) for indicating the corresponding scale.

Images