An angle-adjustable ultrasound-guided nerve block puncture positioning device

Abstract

The present application belongs to the technical field of puncture positioning, in particular to an angle-adjustable nerve block puncture positioning device under ultrasonic guidance, comprising an adjusting unit, the adjusting unit comprising a support frame two, two arc-shaped tubes and a locking assembly, the two arc-shaped tubes being symmetrically arranged on the support frame two, a motor being fixed on the support frame two, the motor being used to drive the locking assembly to rotate, the locking assembly being used to lock when the puncture needle reaches a working position, the locking assembly comprising a limiting ring, a buffer ring and two support housings. The present application can realize accurate angle adjustment of the puncture needle in multiple planes by setting the adjusting unit. When the motor drives the limiting ring to rotate to change the puncture direction, the support frame one automatically slides along an arc-shaped track for position compensation under the drive of the movable roller, ensuring that the puncture needle always makes pure rolling motion around the preset skin needle entry point, avoiding the cumbersome operation of repositioning after angle adjustment.

Description

Technical Field

[0001] This invention belongs to the field of puncture positioning technology, and in particular relates to an ultrasound-guided nerve block puncture positioning device with adjustable angle. Background Technology

[0002] Nerve block is a commonly used technique in clinical anesthesia and pain management. By injecting anesthetic drugs around the nerve, nerve conduction is blocked, achieving the effect of regional anesthesia or analgesia. An adjustable-angle ultrasound-guided nerve block puncture positioning device is an auxiliary medical device specifically used for ultrasound-guided regional anesthesia or pain management. This device can be fixed or used in conjunction with an ultrasound probe and has an adjustable puncture angle guide mechanism, allowing the puncture needle to be advanced along a preset precise path under real-time ultrasound imaging to accurately reach the target nerve or fascial space, thereby achieving a safe and controllable nerve block operation.

[0003] In practical applications, existing devices typically use simple ball joints or flexible arm structures for angle positioning. When the puncture needle is adjusted, the insertion point is often displaced, which means that the insertion point position must be manually compensated after the angle is adjusted. The operator needs to repeatedly adjust the angle at the point, which not only prolongs the puncture time but also increases the risk of tissue damage due to repeated attempts. Summary of the Invention

[0004] The purpose of this invention is to address the problems mentioned in the background art by providing an angle-adjustable ultrasound-guided nerve block puncture positioning device.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] An adjustable-angle ultrasound-guided nerve block puncture positioning device includes an adjustment unit, which includes a support frame two, two arc-shaped tubes and a locking component. The two arc-shaped tubes are symmetrically arranged on the support frame two. A motor is fixed on the support frame two. The motor is used to drive the locking component to rotate. The locking component is used to lock when the puncture needle reaches the working position.

[0007] The locking assembly includes a limiting ring, a buffer ring, and two supporting shells. The buffer ring is fixed to the lower end of the limiting ring. The outer surfaces of the limiting ring and the buffer ring are provided with mounting grooves for fixing the puncture needle. The output end of the motor is connected to one of the supporting shells to drive the limiting ring to rotate, so that the puncture needle switches to the puncture angle in the working state.

[0008] The control unit includes an ultrasound device and a telescopic rod. The fixed end of the telescopic rod is fixedly connected to the ultrasound device, and the telescopic end of the telescopic rod is slidably connected to the adjustment unit. The telescopic rod is used to move the limiting ring and the buffer ring to a preset needle insertion point. Then, the control unit controls the adjustment unit to drive the puncture needle to complete the puncture.

[0009] Preferably, the frame is fixed to the telescopic end of the telescopic rod, the two movable frames are symmetrically arranged on the frame, and the ultrasound device is equipped with a control panel for controlling the imaging and adjustment process.

[0010] Preferably, the adjustment unit further includes a frame, a movable frame one, a movable roller, a support frame one, and a movable frame two. Two movable frames one are symmetrically arranged in the frame. The movable roller is rotatably arranged in the corresponding movable frame one. The support frame one is connected between the two movable rollers and is used to drive the puncture needle to perform arc position compensation when the locking component rotates to adjust the angle.

[0011] Preferably, the locking assembly further includes an airbag and a plurality of locking plates. The airbag is disposed within the support housing and is used to push the locking plates against the arcuate tube to fix the position of the limiting ring after the angle is adjusted.

[0012] Preferably, the limiting ring is provided with an air pumping device, which is connected to the two airbags through a hose and is used to inflate the airbags to drive the locking plate to move outward. The contact surface between the locking plate and the arc-shaped tube is provided with wear-resistant particles to improve the anti-slip capability after locking.

[0013] Preferably, it further includes an anti-backflow unit disposed on the adjustment unit, used to advance with the puncture needle and restrict the reverse retraction of the puncture needle to reduce drug leakage. The anti-backflow unit includes a support plate, an auxiliary positioning device, a rectangular frame and a fixing block. The support plate is connected to another support shell. The auxiliary positioning device is disposed on the support plate and used to detect the puncture path. The column is disposed on the support plate. The sliding frame is slidably disposed in the column and used to move with the puncture needle.

[0014] Preferably, the rectangular frame is disposed on one side of the sliding frame, and the fixing block is disposed at the end of the rectangular frame away from the support plate. The fixing block is used to insert into the preset slot of the puncture needle, so that the rectangular frame and the sliding frame move synchronously when the puncture needle is advanced.

[0015] Preferably, the anti-backflow unit further includes a column, a sliding frame, a second telescopic rod, and a locking assembly. The column has multiple limiting holes along its length, and the second telescopic rod is disposed on the sliding frame.

[0016] Preferably, the locking assembly is disposed at the telescopic end of the telescopic rod two, and is used to cooperate with the limiting hole when the telescopic rod two is retracted, so as to limit the reverse movement of the sliding frame.

[0017] Preferably, the locking assembly includes a rectangular housing, a limiting block, a movable leaf, an elastic element, and a locking wheel. The rectangular housing is connected to the telescopic end of the telescopic rod II. The limiting block is disposed inside the rectangular housing. The movable leaf is rotatably disposed inside the limiting block. The elastic element is disposed between the movable leaf and the limiting block. The locking wheel is rotatably disposed on the rectangular housing and adapted to the limiting hole to allow the puncture needle to advance downward and prevent the puncture needle from retracting upward.

[0018] Compared with existing technologies, the advantages of this angle-adjustable ultrasound-guided nerve block puncture positioning device are:

[0019] 1. By setting an adjustment unit, the present invention can realize the precise angle adjustment of the puncture needle in multiple planes. When the motor drives the limiting ring to rotate and change the puncture direction, the support frame automatically slides along the arc trajectory under the drive of the movable roller, ensuring that the puncture needle always makes a pure rolling motion around the preset skin insertion point, avoiding the tedious operation of repositioning after the angle adjustment, and improving the continuity of multi-point blockage.

[0020] 2. This invention incorporates an anti-backflow unit, which features a locking wheel that engages with a limiting hole. Combined with a one-way locking mechanism of the movable flap and elastic element, the puncture needle is allowed to move freely as it is advanced downwards. However, when the puncture needle tends to retract upwards, the locking wheel is locked and cannot rotate in the opposite direction. This effectively prevents accidental retraction of the puncture needle, avoids extravasation of anesthetic, improves anesthesia safety, and keeps the needle tip continuously stationary at the target point, maintaining tissue hydraulic stability and improving the accuracy and success rate of nerve block anesthesia.

[0021] 3. This invention uses a rectangular frame and a fixing block to hold the needle body, and uses the pre-tightening force of the telescopic rod two to press the locking wheel into the restricting hole array. During the puncture process, the locking wheel rolls stepwise in the hole array, providing a continuous and quantifiable needle insertion damping effect, allowing the operator to obtain clear tactile feedback. In addition, the elastic element stores energy when the locking wheel rotates, which can provide buffering when the puncture resistance is too high, preventing the needle tip from rigidly impacting hard tissue and protecting the integrity of nerves and blood vessels. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall front structure of an ultrasound-guided nerve block puncture positioning device with adjustable angle provided by the present invention.

[0023] Figure 2This is a schematic diagram of the overall back structure of an ultrasound-guided nerve block puncture positioning device with adjustable angle provided by the present invention.

[0024] Figure 3 This is a partial structural schematic diagram of an ultrasound-guided nerve block puncture positioning device with adjustable angle provided by the present invention.

[0025] Figure 4 This is a schematic diagram of the adjustment unit structure of an ultrasound-guided nerve block puncture positioning device with adjustable angle provided by the present invention.

[0026] Figure 5 This invention provides Figure 4 A magnified schematic diagram of the structure at point A in the diagram.

[0027] Figure 6 This is a schematic diagram of the internal structure of the locking component of an ultrasound-guided nerve block puncture positioning device with adjustable angle provided by the present invention.

[0028] Figure 7 This is a schematic diagram of the anti-backflow unit structure of an ultrasound-guided nerve block puncture positioning device with adjustable angle provided by the present invention.

[0029] Figure 8 This invention provides Figure 7 Enlarged schematic diagram of the structure at point B in the diagram;

[0030] Figure 9 This is a schematic diagram of the locking component structure of an ultrasound-guided nerve block puncture positioning device with adjustable angle provided by the present invention.

[0031] In the diagram: 1. Ultrasonic device; 2. Control panel; 3. Telescopic rod one; 4. Adjustment unit; 5. Anti-backflow unit; 41. Frame; 42. Movable frame one; 43. Movable roller; 44. Support frame one; 45. Movable frame two; 46. Support frame two; 47. Arc-shaped tube; 48. Locking assembly; 481. Limiting ring; 482. Buffer ring; 483. Support shell; 484. Airbag; 485. Locking plate; 51. Support plate; 52. Auxiliary positioning device; 53. Column; 54. Limiting hole; 55. Sliding frame; 56. Telescopic rod two; 57. Locking assembly; 58. Rectangular frame; 59. Fixing block; 571. Rectangular shell; 572. Limiting block; 573. Movable flap; 574. Elastic element; 575. Locking wheel. Detailed Implementation

[0032] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0033] Example: Refer to Figures 1 to 9An adjustable-angle ultrasound-guided nerve block puncture positioning device includes an adjustment unit 4. The adjustment unit 4 includes a support frame 46, two arc tubes 47 and a locking component 48. The two arc tubes 47 are symmetrically arranged on the support frame 46. A motor is fixed on the support frame 46. The motor is used to drive the locking component 48 to rotate. The locking component 48 is used to lock when the puncture needle reaches the working position.

[0034] The locking assembly 48 includes a limiting ring 481, a buffer ring 482, and two support housings 483. The buffer ring 482 is fixed to the lower end of the limiting ring 481. The outer surfaces of the limiting ring 481 and the buffer ring 482 are provided with mounting grooves for fixing the puncture needle. The output end of the motor is connected to one of the support housings 483 to drive the limiting ring 481 to rotate, so that the puncture needle switches the puncture angle in the working state.

[0035] The control unit includes an ultrasound device 1 and a telescopic rod 3. The fixed end of the telescopic rod 3 is fixedly connected to the ultrasound device 1, and the telescopic end of the telescopic rod 3 is slidably connected to the adjustment unit 4. This is used to move the limiting ring 481 and the buffer ring 482 to the preset needle insertion point. Subsequently, the control unit probes and controls the adjustment unit 4 to drive the puncture needle to complete the puncture. The ultrasound device 1 is equipped with a control panel 2 for controlling the imaging and adjustment process. By moving the ultrasound device 1, the nerve block site of the patient is locked by emitting and receiving sound waves. Then, the ultrasound device 1 and the control panel 2 are set up so that the ultrasound device 1 can detect the nerve block site of the patient in real time. Then, the telescopic rod 3 is activated to extend and retract, driving the position of the adjustment unit 4 to determine the needle insertion point of the patient.

[0036] To further explain, such as Figure 4 and Figure 5 As shown, the adjustment unit 4 also includes a frame 41, a movable frame 42, a movable roller 43, a support frame 44, and a movable frame 45. The two movable frames 42 are symmetrically arranged on the frame 41, and the movable roller 43 is rotatably arranged in the corresponding movable frame 42. The support frame 44 is connected between the two movable rollers 43 and is used to drive the puncture needle to perform arc position compensation when the locking component 48 rotates to adjust the angle.

[0037] To elaborate further, such as Figure 6 As shown, the locking assembly 48 also includes an airbag 484 and a plurality of locking plates 485. The airbag 484 is disposed within the support housing 483 and is used to push the locking plates 485 against the arc-shaped tube 47 to fix the position of the limiting ring 481 after the angle is adjusted.

[0038] A pumping device is provided on the limiting ring 481. The pumping device is connected to two airbags 484 through a hose and is used to inflate the airbags 484 to drive the locking plate 485 to move outward. The contact surface between the locking plate 485 and the arc tube 47 is provided with wear-resistant particles to improve the anti-slip ability after locking.

[0039] Specifically, after the angle adjustment is completed, simply start the air pumping device to pump air into the two airbags 484, making the volume of the airbags 484 larger and pushing the multiple locking plates 485 to move away from each other. When the multiple locking plates 485 contact the inner wall of the arc tube 47, the limiting ring 481 and the column 53 can be locked, making the angle of the puncture needle unable to be adjusted.

[0040] To further explain, such as Figure 7 and Figure 8 As shown, it also includes an anti-backflow unit 5, which is set on the adjustment unit 4. It is used to advance with the puncture needle and restrict the reverse retraction of the puncture needle to reduce the leakage of the drug solution. The anti-backflow unit 5 includes a support plate 51, an auxiliary positioning device 52, a rectangular frame 58 and a fixing block 59. The support plate 51 is connected to another support housing 483. The auxiliary positioning device 52 is set on the support plate 51 and is used to detect the puncture path. The column 53 is set on the support plate 51. The sliding frame 55 is slidably set in the column 53 and is used to move with the puncture needle.

[0041] A rectangular frame 58 is disposed on one side of a sliding frame 55, and a fixing block 59 is disposed at the end of the rectangular frame 58 away from the support plate 51. The fixing block 59 is used to insert into the preset slot of the puncture needle, so that the rectangular frame 58 and the sliding frame 55 move synchronously when the puncture needle is advanced.

[0042] The anti-backflow unit 5 also includes a column 53, a sliding frame 55, a second telescopic rod 56, and a locking assembly 57. The column 53 has multiple limiting holes 54 along its length. The second telescopic rod 56 is mounted on the sliding frame 55. The locking assembly 57 is mounted on the telescopic end of the second telescopic rod 56 and is used to cooperate with the limiting holes 54 when the second telescopic rod 56 is retracted to limit the reverse movement of the sliding frame 55.

[0043] Specifically, the auxiliary positioning device 52 is activated. By emitting and receiving sound waves, the path of the puncture needle can be detected, allowing the puncture needle to reasonably avoid the patient's non-puncture sites and ensuring that the puncture needle is not obstructed during puncture. During the activation of the auxiliary positioning device 52, the output end of the motor can drive one of the support housings 483 and the limiting ring 481 to rotate. The other support housing 483 will rotate simultaneously with the limiting ring 481, causing the support plate 51 to drive the auxiliary positioning device 52 and the column 53 to rotate.

[0044] It should be noted that since the puncture needle will be mounted on the rectangular frame 58 and the limiting ring 481 during the subsequent puncture process, the insertion point of the puncture needle will change during the rotation of the limiting ring 481 and the column 53. In order to ensure that the puncture needle does not deviate from the insertion point, when the limiting ring 481 rotates, the support frame 1 44 will slide in the same direction as the movable frame 1 42. That is, when the limiting ring 481 and the column 53 rotate clockwise along the movable frame 2 45, the insertion point of the puncture needle will shift to the left. At this time, by letting the support frame 1 44 slide clockwise along the movable frame 1 42, the limiting ring 481 and the column 53 will move to the right, so that the insertion point of the puncture needle is the same as the preset position.

[0045] To elaborate further, such as Figure 9 As shown, the locking assembly 57 includes a rectangular housing 571, a limiting block 572, a movable leaf 573, an elastic element 574, and a locking wheel 575. The rectangular housing 571 is connected to the telescopic end of the telescopic rod 56. The limiting block 572 is disposed inside the rectangular housing 571. The movable leaf 573 is rotatably disposed inside the limiting block 572. The elastic element 574 is disposed between the movable leaf 573 and the limiting block 572. The locking wheel 575 is rotatably disposed on the rectangular housing 571 and is adapted to the limiting hole 54 to allow the puncture needle to advance downward and prevent the puncture needle from retracting upward.

[0046] Specifically, the puncture needle is placed on the device, and the fixing block 59 is inserted into the preset slot of the puncture needle. When the puncture needle is inserted, it can move the sliding frame 55 through the rectangular frame 58 and the fixing block 59. Then, the telescopic rod 56 is activated to shorten it and drive the locking wheel 575 into the limiting hole 54. When the puncture needle is inserted, the locking wheel 575 will move downward and rotate with the sliding frame 55. When the locking wheel 575 moves downward, the movable page 573 will be pushed to rotate by the locking wheel 575. When the locking wheel 575, i.e. the puncture needle, has the tendency to move upward, the movable page 573 will block the locking wheel 575, preventing it from rotating in the opposite direction. This prevents the locking wheel 575, i.e. the puncture needle, from moving upward, thus preventing the puncture needle from moving too far in the opposite direction during puncture and causing extravasation of anesthetic.

[0047] The functional principle of this invention can be explained through the following operation: The operator uses an ultrasound device 1 to emit and receive sound waves to perform real-time imaging of the nerve block site of the patient and determine the location of the puncture target point. The operator stably sets up the ultrasound device 1 and the control panel 2 so that the ultrasound device 1 continuously monitors the puncture area. The operator activates the telescopic rod 3, and the telescopic end of the telescopic rod 3 moves, driving the adjustment unit 4 and the anti-backflow unit 5 to move. The adjustment unit 4 and the anti-backflow unit 5 change their positions in space to initially determine the needle insertion point on the body surface. The operator activates the auxiliary positioning device 52, which emits and receives sound waves to detect the expected path of the puncture needle. The detection results of the auxiliary positioning device 52 help the operator avoid non-puncture structures such as blood vessels and bones, enhancing the safety of the puncture process.

[0048] When the operator needs to adjust the angle of the puncture needle, the motor is started, and the output end of the motor rotates. The output end of the motor is fixedly connected to one of the support housings 483, and the output end of the motor drives the support housing 483 to rotate. The limiting ring 481 is fixedly connected to the support housing 483 and rotates together with the support housing 483. The other support housing 483 is fixedly connected to the limiting ring 481 and also rotates with the limiting ring 481. The support plate 51 is fixedly connected to one of the support housings 483 and rotates with the support housing 483. The auxiliary positioning device 52 is fixed on the support plate 51 and rotates with the support plate 51. The column 53 is fixed to the upper end of the support plate 51 and rotates with the support plate 51. Driven by the motor, the support plate 51, the auxiliary positioning device 52 and the column 53 rotate, changing the insertion angle of the puncture needle.

[0049] During the angle adjustment process, the support frame 44 and the movable roller 43 are rotatably connected. The movable roller 43 is set in the inner cavity of the movable frame 42. The movable frame 42 is symmetrically fixed on the frame 41. When the limiting ring 481 and the support shell 483 rotate, the support frame 44 rotates. The rotation of the support frame 44 is converted into the rotation of the movable roller 43 in the inner cavity of the movable frame 42. The movable roller 43 rolls along the arc trajectory of the movable frame 42. Under the drive of the movable roller 43, the support frame 44 slides along the arc trajectory of the movable frame 42. This sliding compensates for the offset of the needle insertion point caused by the rotation of the support plate 51 and the column 53, so that the puncture needle is kept at the preset needle insertion point position.

[0050] After the operator completes the angle adjustment, the adjustment unit 4 needs to be locked. The operator then starts the air pump, which is fixed to the limiting ring 481. The air pump is connected to the two airbags 484 via hoses. The air pump pumps air into the two airbags 484, causing them to expand. The outer surface of the airbag 484 is fixedly connected to the inner wall of the locking plate 485. When the airbag 484 expands, it exerts an outward thrust on the locking plate 485. There are multiple locking plates 485, which are slidably connected to the inner wall of the supporting shell 483. Under the push of the airbags 484, the locking plates 485 move along the inner wall of the supporting shell 483. The inner walls move away from each other, and the arc-shaped tube 47 is symmetrically fixed to the inner wall of the support frame 46. The inner wall of the arc-shaped tube 47 is provided with multiple wear-resistant particles, and the surface of the locking plate 485 is also provided with multiple wear-resistant particles. After the multiple locking plates 485 move outward, the wear-resistant particles on the outer surface of the locking plate 485 come into contact with the wear-resistant particles on the inner wall of the arc-shaped tube 47 and generate friction. The locking plate 485 and the arc-shaped tube 47 form a tight contact, and the locking plate 485 can no longer move. The position of the support shell 483 is fixed, the position of the limiting ring 481 is also fixed, the entire adjustment unit 4 is locked, and the angle of the puncture needle can no longer be adjusted.

[0051] The operator places the puncture needle on the device. A fixing block 59 is fixed to the end of the rectangular frame 58 away from the sliding frame 55. The fixing block 59 is inserted into a pre-set slot in the puncture needle. During puncture, the fixing block 59 moves with the puncture needle, causing the rectangular frame 58 to move. The rectangular frame 58 is fixed to the side of the sliding frame 55 away from the telescopic rod 56. The rectangular frame 58 also moves the sliding frame 55, which is positioned within the inner groove of the column 53 and slides along this groove. The operator starts the telescopic rod 56, and the telescopic end of the telescopic rod 56 moves in a telescopic motion. The telescopic end of the telescopic rod 56 is fixedly connected to the rectangular shell 571 in the locking assembly 57. When the telescopic rod 56 is shortened, it drives the rectangular shell 571 to move closer to the column 53. The rectangular shell 571 is rotatably connected to a locking wheel 575, which is adapted to the multiple limiting holes 54 arrayed on the column 53. After the telescopic rod 56 drives the rectangular shell 571 to move, the locking wheel 575 is engaged in the limiting hole 54.

[0052] When the operator performs a puncture, the puncture needle moves downward, the fixed block 59 drives the sliding frame 55 to slide downward, and the sliding frame 55 drives the locking assembly 57 to move downward as a whole. During the downward movement, the outer surface of the locking wheel 575 contacts the inner wall of the limiting hole 54, causing the locking wheel 575 to rotate. The rotation of the locking wheel 575 pushes the movable page 573, which rotates under the push of the locking wheel 575. The rotation of the movable page 573 compresses the elastic element 574, which stores elastic potential energy. After the movable page 573 rotates, it makes room, and the locking wheel 575 smoothly passes through the limiting hole 54 and continues to move downward. The advancement of the puncture needle is unimpeded. During the puncture operation, if the puncture needle... As the needle tends to retract upwards, the sliding frame 55 drives the locking assembly 57 to move upwards as a whole. During the upward movement, the outer surface of the locking wheel 575 contacts the inner wall of the limiting hole 54, causing the locking wheel 575 to tend to rotate in the opposite direction. Under the action of the elastic potential energy released by the elastic element 574, the movable page 573 will adhere to the inner wall of the rectangular shell 571, so that the movable page 573 can lock the outer surface of the locking wheel 575, preventing the locking wheel 575 from rotating in the opposite direction. The locking wheel 575 cannot rotate and is stuck in the limiting hole 54, unable to move upwards. The sliding frame 55 will prevent the puncture needle from retracting upwards, so that the puncture needle will not retract unexpectedly during the puncture process, avoiding extravasation of anesthetic.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An angle-adjustable ultrasound-guided nerve block puncture positioning device, characterized in that, include: Adjustment unit (4), the adjustment unit (4) includes support frame two (46), two arc tubes (47) and locking component (48), the two arc tubes (47) are symmetrically arranged on support frame two (46), a motor is fixed on support frame two (46), the motor is used to drive the locking component (48) to rotate, and the locking component (48) is used to lock when the puncture needle reaches the working position; The locking assembly (48) includes a limiting ring (481), a buffer ring (482), and two supporting shells (483). The buffer ring (482) is fixed to the lower end of the limiting ring (481). The outer surfaces of the limiting ring (481) and the buffer ring (482) are provided with mounting grooves for fixing the puncture needle. The output end of the motor is connected to one of the supporting shells (483) to drive the limiting ring (481) to rotate, so that the puncture needle switches to the puncture angle in the working state. The control unit includes an ultrasound device (1) and a telescopic rod (3). The fixed end of the telescopic rod (3) is fixedly connected to the ultrasound device (1), and the telescopic end of the telescopic rod (3) is slidably connected to the adjustment unit (4). The control unit moves the limiting ring (481) and the buffer ring (482) to the preset needle insertion point. Then, the control unit controls the adjustment unit (4) to drive the puncture needle to complete the puncture.

2. The ultrasound-guided nerve block puncture positioning device with adjustable angle according to claim 1, characterized in that, The ultrasound device (1) is equipped with a control panel (2) for controlling the imaging and adjustment process.

3. The ultrasound-guided nerve block puncture positioning device with adjustable angle according to claim 1, characterized in that, The adjustment unit (4) further includes a frame (41), a movable frame one (42), a movable roller (43), a support frame one (44), and a movable frame two (45). The two movable frames one (42) are symmetrically arranged on the frame (41). The movable roller (43) is rotatably arranged in the corresponding movable frame one (42). The support frame one (44) is connected between the two movable rollers (43) and is used to drive the puncture needle to perform arc position compensation when the locking component (48) rotates to adjust the angle.

4. The ultrasound-guided nerve block puncture positioning device with adjustable angle according to claim 1, characterized in that, The locking assembly (48) also includes an airbag (484) and a plurality of locking plates (485). The airbag (484) is disposed within the support housing (483) and is used to push the locking plates (485) against the arcuate tube (47) to fix the position of the limiting ring (481) after the angle is adjusted.

5. The ultrasound-guided nerve block puncture positioning device with adjustable angle according to claim 4, characterized in that, The limiting ring (481) is provided with an air pumping device, which is connected to the two airbags (484) through a hose and is used to inflate the airbags (484) to drive the locking plate (485) to move outward. The contact surface between the locking plate (485) and the arc tube (47) is provided with wear-resistant particles to improve the anti-slip ability after locking.

6. The ultrasound-guided nerve block puncture positioning device with adjustable angle according to claim 1 further includes an anti-backflow unit (5), characterized in that, The anti-backflow unit (5) is set on the adjustment unit (4) and is used to advance with the puncture needle and restrict the reverse retraction of the puncture needle to reduce the leakage of the drug solution. The anti-backflow unit (5) includes a support plate (51), an auxiliary positioning device (52), a rectangular frame (58) and a fixing block (59). The support plate (51) is connected to another support shell (483). The auxiliary positioning device (52) is set on the support plate (51) and is used to detect the puncture path. The column (53) is set on the support plate (51). The sliding frame (55) is slidably set in the column (53) and is used to move with the puncture needle.

7. The ultrasound-guided nerve block puncture positioning device with adjustable angle according to claim 6, characterized in that, The rectangular frame (58) is disposed on one side of the sliding frame (55), and the fixing block (59) is disposed at one end of the rectangular frame (58) away from the support plate (51). The fixing block (59) is used to insert into the preset slot of the puncture needle, so that the rectangular frame (58) and the sliding frame (55) move synchronously when the puncture needle is advanced.

8. The angle-adjustable ultrasound-guided nerve block puncture positioning device according to claim 6, characterized in that, The anti-backflow unit (5) also includes a column (53), a sliding frame (55), a second telescopic rod (56) and a locking assembly (57). The column (53) has multiple limiting holes (54) along its length, and the second telescopic rod (56) is mounted on the sliding frame (55).

9. The angle-adjustable ultrasound-guided nerve block puncture positioning device according to claim 8, characterized in that, The locking component (57) is disposed at the telescopic end of the telescopic rod two (56) and is used to cooperate with the limiting hole (54) when the telescopic rod two (56) is retracted to limit the reverse movement of the sliding frame (55).

10. The angle-adjustable ultrasound-guided nerve block puncture positioning device according to claim 8, characterized in that, The locking assembly (57) includes a rectangular shell (571), a limiting block (572), a movable leaf (573), an elastic element (574), and a locking wheel (575). The rectangular shell (571) is connected to the telescopic end of the telescopic rod (56). The limiting block (572) is disposed inside the rectangular shell (571). The movable leaf (573) is rotatably disposed inside the limiting block (572). The elastic element (574) is disposed between the movable leaf (573) and the limiting block (572). The locking wheel (575) is rotatably disposed on the rectangular shell (571) and is adapted to the limiting hole (54) to allow the puncture needle to advance downward and prevent the puncture needle from retracting upward.

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