Ultrasonic-guided joint puncture device for rheumatism immune disease diagnosis

Abstract

The invention relates to the technical field of medical instruments, and discloses an ultrasonic-guided joint puncture device for rheumatism immune disease diagnosis, which comprises a base, through a designed hydraulic rod and a designed driving motor, a puncture needle cylinder is allowed to move left and right, and up-down fine adjustment is also supported; the multi-dimensional adjusting capability ensures that the needle head of the puncture needle cylinder can accurately reach the preset position, even if the needle head is in a complex joint structure or changes of the effusion position, the needle head is suitable for extracting effusion from the side edge of the joint of a patient, the puncture success rate is improved to a certain degree, damage of the needle head of the puncture needle cylinder to surrounding tissue is reduced through accurate positioning, and the puncture effect is improved. According to the device, the risk of postoperative complications such as bleeding and infection is reduced, and meanwhile, the accurate puncture position ensures that joint effusion can be effectively extracted, so that the accuracy of follow-up laboratory detection is improved, and a reliable basis is provided for diagnosis of rheumatism immune diseases.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and particularly to an ultrasound-guided joint puncture device for the diagnosis of rheumatic immune diseases. Background Art

[0002] In the clinical diagnosis of rheumatic immune diseases, arthrocentesis is a key method for obtaining joint effusion for laboratory analysis, and it has important value especially in the differential diagnosis of diseases such as rheumatoid arthritis and gouty arthritis; Currently, blind puncture or ultrasound-assisted handheld puncture is mostly used clinically. The puncture angle and depth mainly depend on the doctor's experience, and it is easy to cause puncture failure or damage to surrounding blood vessels, nerves, and cartilage tissues due to positioning deviation. For patients with less knee joint effusion or special positions, such as suprapatellar bursa or popliteal fossa effusion, the traditional method requires multiple attempts, increasing the patient's pain and the risk of complications, such as intra-articular bleeding, infection, etc. At the same time, a puncture bracket is also used to assist the doctor in performing the puncture operation, but most of the existing puncture brackets are designed with a fixed angle, and the height of the syringe fixed on the puncture bracket needs to be manually adjusted according to the height of the leg joints of different patients. The height adjustment of the puncture bracket generally uses the traditional threaded fixing method, which is not only cumbersome to operate but also difficult to quickly adapt to the knee flexion requirements of different patients, such as obese patients or those with joint contracture, easily resulting in limited puncture paths. Summary of the Invention

[0003] (I) Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides an ultrasound-guided joint puncture device for the diagnosis of rheumatic immune diseases. Through the designed hydraulic rod and driving motor, the present invention not only allows the puncture syringe to move left and right but also supports fine adjustment up and down. This multi-dimensional adjustment ability ensures that the needle of the puncture syringe can accurately reach the predetermined position. Even in the face of complex joint structures or changes in the effusion position, it is suitable for the operation of extracting effusion from the side of the patient's joint, which can improve the puncture success rate to a certain extent. The accurate positioning reduces the damage of the needle of the puncture syringe to the surrounding tissues and reduces the risk of postoperative complications, such as bleeding, infection, etc. At the same time, the accurate puncture position ensures that the joint effusion can be effectively extracted, thereby improving the accuracy of subsequent laboratory tests and providing a reliable basis for the diagnosis of rheumatic immune diseases.

[0004] (II) Technical Solutions To solve the above technical problems, the present invention provides the following technical solution: An ultrasound-guided joint puncture device for the diagnosis of rheumatic immune diseases, including a base, on the top left side of the base is fixedly connected with a thigh cushion plate, on the upper rear side of the base is provided with a chute, in the middle on the right side of the base is fixedly connected with an electric linear actuator, the output end of the electric linear actuator is fixedly connected with a calf cushion plate, on the front side of the top of the thigh cushion plate and on the rear side of the top of the calf cushion plate are both fixedly connected with straps, and below the front end face of the calf cushion plate is fixedly connected with a slider; On the front side of the right end face of the base is fixedly connected with a hydraulic rod, the output end of the hydraulic rod is fixedly connected with a connecting rod, the end of the connecting rod away from the hydraulic rod is fixedly connected with a bottom plate, on the top of the bottom plate is fixedly connected with a hollow shell, on the front end face of the hollow shell is fixedly connected with a driving motor, the output end of the driving motor is fixedly connected with a bidirectional threaded rod, on the outer side of the bidirectional threaded rod is helically connected with a moving block, the top end of the moving block is rotatably connected with a support rod, the end of the support rod away from the moving block is rotatably connected with a top plate, on the top of the top plate is fixedly connected with a mounting seat, inside the mounting seat is slidably connected with a puncture syringe, on the right end face of the puncture syringe is fixedly connected with a liquid extraction tube, and the end of the liquid extraction tube away from the puncture syringe is fixedly connected with a liquid extraction pump.

[0005] Preferably, the rear end face of the thigh cushion plate contacts the front end face of the calf cushion plate, the end of the bidirectional threaded rod away from the driving motor is rotatably connected to the middle of the rear part inside the hollow shell, the outer side of the moving block is slidably connected to the inner wall of the hollow shell, and the outer side of the support rod is slidably connected to the middle of the upper part inside the hollow shell. This not only allows the puncture syringe to move left and right but also supports fine-tuning up and down. This multi-dimensional adjustment ability ensures that the needle of the puncture syringe can accurately reach the predetermined position. Even in the face of complex joint structures or changes in the position of the effusion, it is suitable for the operation of extracting effusion from the side of the patient's joint, and to a certain extent, improves the puncture success rate.

[0006] Preferably, the top of the hollow shell is in a parallel state with the top of the thigh cushion plate. In the middle of the upper part inside the hollow shell is provided with a through groove from front to back, and the width of the through groove in the middle of the upper part inside the hollow shell matches the cross-sectional diameter of the support rod, achieving the purpose of driving the top plate outside the top of the hollow shell to move up and down by the moving block inside the hollow shell.

[0007] Preferably, the driving motor can rotate forward and backward. Between the top of the moving block and the bottom of the support rod, and between the bottom of the top plate and the top of the support rod, there are both provided with rotating shafts, and the rotation angle of the rotating shafts is limited to 90°. It can achieve the effect that the moving block that can move back and forth drives the top plate to move up and down through the rotation of the support rod.

[0008] Preferably, a through hole extending from front to back is formed in the middle of the mounting base, and the diameter of the through hole in the middle of the mounting base matches the cross-sectional diameter of the puncture syringe. The puncture syringe can be inserted into the mounting base by moving from right to left, avoiding manual insertion of the puncture syringe into the joint of the patient, and improving the puncture success rate to a certain extent.

[0009] Preferably, soft pads are provided on the tops of the thigh pad and the calf pad, and the length of the thigh pad is the same as that of the calf pad. The maximum height at which the electric linear actuator drives the calf pad to rise is the same as the height of the thigh pad. This not only allows the doctor to accurately control the bending degree of the knee according to the specific needs of the patient, but also ensures that the patient can maintain the most comfortable posture during the puncture process. This design ingeniously solves the problem of differences in joint movement ranges among different patients.

[0010] Preferably, the cross-sectional shape of the slider is convex. The slider slides in the chute at the rear upper side of the base, and the cross-sectional shape of the chute at the rear upper side of the base matches the cross-sectional shape of the slider. The slider under the front end of the calf pad can longitudinally slide in the chute at the rear upper side of the base, improving the stability of the longitudinal sliding of the calf pad on the rear end face of the thigh pad to a certain extent.

[0011] Preferably, clamping blocks are fixedly connected to the front and rear sides of the right end face of the mounting base. A magnetic sheet is fixedly connected to the right side inside the clamping block. An insertion plate is fixedly connected to the right surface of the puncture syringe. The outer side of the insertion plate is slidably connected to the inner side of the clamping block. The left end face of the magnetic sheet is magnetically fixed to the right end face of the insertion plate. An ultrasonic probe is fixedly connected above the left end face of the mounting base. This enables the puncture syringe and the mounting base to be detachably connected. The insertion plate is restricted inside the clamping block by magnetic attraction of the magnetic sheet. The detachable design allows the doctor to easily separate or combine the puncture syringe and the mounting base without complex tools, greatly simplifying the operation steps.

[0012] Preferably, the number of the insertion plates is two, and the insertion plates are evenly distributed on the upper and lower sides of the right surface of the puncture syringe. The insertion plates are made of metal that can be magnetically attracted. The insertion plates rotate counterclockwise into the clamping blocks and are magnetically fixed by the magnetic sheets. The magnetic fixing method utilizes the characteristics of the metal material of the insertion plates and the magnetic sheets, enabling the puncture syringe and the mounting base to be automatically adsorbed instantly when they come into contact, ensuring the stability and accuracy of the installation, and avoiding the cumbersome rotation operation in the traditional thread fixing method.

[0013] Compared with the prior art, the present invention provides an ultrasound-guided joint puncture device for the diagnosis of rheumatic immune diseases, having the following beneficial effects: 1. Compared with the prior art, the present invention, through the designed hydraulic rod and drive motor, not only allows the puncture syringe to move left and right, but also supports fine-tuning up and down. This multi-dimensional adjustment ability ensures that the needle of the puncture syringe can accurately reach the predetermined position. Even in the face of complex joint structures or changes in the position of the effusion, it is suitable for the operation of extracting effusion from the side of the patient's joint, which improves the puncture success rate to a certain extent. The precise positioning reduces the damage of the needle of the puncture syringe to the surrounding tissues and reduces the risk of postoperative complications such as bleeding and infection. At the same time, the precise puncture position ensures that the joint effusion can be effectively extracted, thereby improving the accuracy of subsequent laboratory tests and providing a reliable basis for the diagnosis of rheumatic immune diseases.

[0014] 2. Compared with the prior art, the present invention, through the designed clamping block and insertion plate, can achieve the detachable purpose between the puncture syringe and the mounting seat, and the insertion plate is restricted inside the clamping block by magnetic attraction of the magnetic sheet. The detachable design allows the doctor to easily separate or combine the puncture syringe and the mounting seat without complex tools, greatly simplifying the operation steps. At the same time, the magnetic attraction fixing method utilizes the characteristics of the metal material of the insertion plate and the magnetic sheet, so that the puncture syringe and the mounting seat are automatically adsorbed instantly when they come into contact, ensuring the stability and accuracy of the installation, and avoiding the cumbersome rotation operation in the traditional thread fixing method. This not only reduces the preparation time of the doctor during the operation, but also reduces the risk of the syringe falling off or being damaged due to improper operation. In addition, the ability to quickly replace the syringe is particularly important in dealing with emergencies or multiple consecutive punctures. It can ensure that the doctor responds quickly and improves the diagnosis and treatment efficiency.

[0015] 3. Compared with the prior art, the present invention, through the designed electric linear actuator and calf pad, shows extremely high flexibility in terms of leg length adaptation and knee bending degree adjustment. The up and down sliding function of the calf pad not only allows the doctor to precisely control the knee bending degree according to the specific needs of the patient, but also ensures that the patient can maintain the most comfortable posture during the puncture process. This design cleverly solves the problem of differences in the joint movement range of different patients. Whether it is a young patient who needs a larger bending angle to adapt to their flexible joints, or an elderly patient who needs a smaller bending angle due to limited joint movement, the present invention can easily handle it. Through this personalized adjustment, not only the comfort and cooperation of the patient are improved, but also the accuracy and success rate of the puncture are further increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the longitudinal sectional structure of the hollow shell of the present invention; Figure 3 is an exploded structure diagram of the mounting seat and the puncture syringe of the present invention; Figure 4Schematic diagram of the 90° lateral rotation of the clamping block of the present invention; Figure 5 Schematic diagram of the longitudinal section structure of the mounting seat of the present invention; Figure 6 Schematic diagram of the 180° lateral rotation of the whole of the present invention and the downward movement of the electric linear actuator; Figure 7 Schematic diagram of the 180° lateral rotation and longitudinal section structure of the base of the present invention; Figure 8 Schematic diagram of the 180° lateral rotation of the calf cushion of the present invention; Figure 9 Schematic diagram of the 180° lateral rotation of the whole of the present invention.

[0017] Wherein: 1. Base; 101. Thigh cushion; 102. Straps; 103. Chute; 2. Calf cushion; 201. Electric linear actuator; 202. Slide block; 3. Hydraulic rod; 301. Connecting rod; 302. Base plate; 303. Hollow shell; 304. Driving motor; 305. Top plate; 306. Bidirectional threaded rod; 307. Moving block; 308. Support rod; 4. Mounting seat; 401. Clamping block; 402. Puncture syringe; 403. Liquid extraction tube; 404. Liquid extraction pump; 405. Insertion plate; 406. Magnetic sheet; 407. Ultrasonic probe. Detailed implementation manners

[0018] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 as shown: An ultrasonic-guided joint puncture device for the diagnosis of rheumatic immune diseases, including a base 1, a thigh cushion 101 is welded to the top left of the base 1, a chute 103 is opened at the rear upper side of the base 1, an electric linear actuator 201 is fixed to the middle right of the base 1 by bolts, the output end of the electric linear actuator 201 is fixed to the calf cushion 2 by bolts, straps 102 are arranged on the front upper side of the thigh cushion 101 and the rear upper side of the calf cushion 2, and a slide block 202 is welded below the front end face of the calf cushion 2; The front side of the right end of the base 1 is fixed with a hydraulic rod 3 by bolts. The output end of the hydraulic rod 3 is welded with a connecting rod 301. One end of the connecting rod 301 away from the hydraulic rod 3 is welded with a bottom plate 302. The top of the bottom plate 302 is welded with a hollow shell 303. The front end face of the hollow shell 303 is fixed with a driving motor 304 by bolts. The output shaft of the output end of the driving motor 304 penetrates through the middle inside the bidirectional threaded rod 306 and is welded and fixed. The outside of the bidirectional threaded rod 306 penetrates through the inside of the moving block 307 and is threadedly connected. The top of the moving block 307 is connected with a support rod 308 through a rotating shaft. One end of the support rod 308 away from the moving block 307 is connected with a top plate 305 through a rotating shaft. The top of the top plate 305 is welded with a mounting seat 4. The inside of the mounting seat 4 is penetrated and slid by a puncture syringe 402. A liquid extraction tube 403 is arranged on the right end face of the puncture syringe 402. One end of the liquid extraction tube 403 away from the puncture syringe 402 is provided with a liquid extraction pump 404. The rear end face of the thigh cushion 101 is in contact with the front end face of the calf cushion 2. One end of the bidirectional threaded rod 306 away from the driving motor 304 is rotatably connected to the middle of the rear part inside the hollow shell 303. The outside of the moving block 307 is slidably connected to the inner wall of the hollow shell 303. The outside of the support rod 308 is slidably connected to the middle of the upper part inside the hollow shell 303.

[0020] In this embodiment: not only is the puncture syringe 402 allowed to move left and right, but also up and down fine-tuning is supported. This multi-dimensional adjustment ability ensures that the needle of the puncture syringe 402 can accurately reach the predetermined position. Even in the face of complex joint structures or changes in the position of the effusion, it is suitable for the operation of extracting effusion from the side of the patient's joint, and the puncture success rate is improved to a certain extent.

[0021] In an alternative embodiment: the top of the hollow shell 303 is parallel to the top of the thigh cushion 101. A through groove from front to back is opened in the middle of the upper part inside the hollow shell 303, and the width of the through groove in the middle of the upper part inside the hollow shell 303 matches the cross-sectional diameter of the support rod 308.

[0022] In this embodiment: the purpose of driving the top plate 305 outside the top of the hollow shell 303 to move up and down by the moving block 307 inside the hollow shell 303 is achieved.

[0023] In an alternative embodiment: the driving motor 304 can rotate forward and backward. Rotating shafts are arranged between the top of the moving block 307 and the bottom of the support rod 308, and between the bottom of the top plate 305 and the top of the support rod 308, and the rotation angle of the rotating shaft is limited to 90°.

[0024] In this embodiment: the moving block 307 that can move back and forth can drive the top plate 305 to move up and down through the rotation of the support rod 308.

[0025] In an alternative embodiment: a through hole from front to back is opened in the middle of the inside of the mounting seat 4, and the diameter of the through hole in the middle of the inside of the mounting seat 4 matches the cross-sectional diameter of the puncture syringe 402.

[0026] In this embodiment, the puncture syringe 402 can be inserted into the mounting base 4 in the moving direction from right to left, avoiding manually inserting the puncture syringe 402 into the joint of the patient, and to a certain extent improving the puncture success rate.

[0027] In an alternative embodiment, soft pads are provided on the tops of the thigh pad 101 and the calf pad 2, and the length of the thigh pad 101 is the same as the length of the calf pad 2. The maximum height at which the electric linear actuator 201 drives the calf pad 2 to rise is the same as the height of the thigh pad 101.

[0028] In this embodiment, it not only allows the doctor to precisely control the bending degree of the knee according to the specific needs of the patient, but also ensures that the patient can maintain the most comfortable posture during the puncture process. This design ingeniously solves the problem of differences in joint movement ranges among different patients.

[0029] In an alternative embodiment, the cross-sectional shape of the slider 202 is convex, and the slider 202 slides in the chute 103 at the rear upper side of the base 1, and the cross-sectional shape of the chute 103 at the rear upper side of the base 1 matches the cross-sectional shape of the slider 202.

[0030] In this embodiment, the slider 202 below the front end of the calf pad 2 can longitudinally slide in the chute 103 at the rear upper side of the base 1, to a certain extent improving the stability of the longitudinal sliding of the calf pad 2 on the rear end face of the thigh pad 101.

[0031] Please refer to Figures 2 to 5 as shown in On the front and rear sides of the right end face of the mounting base 4, clamping blocks 401 are welded. The right side inside the clamping block 401 is inserted and fixed by a magnetic sheet 406. An insertion plate 405 is provided on the right surface of the puncture syringe 402. The outside of the insertion plate 405 is slidably connected to the inside of the clamping block 401. The left end face of the magnetic sheet 406 is magnetically attracted and fixed to the right end face of the insertion plate 405. An ultrasonic probe 407 is provided above the left end face of the mounting base 4.

[0032] In this embodiment, the puncture syringe 402 and the mounting base 4 can be made detachable, and the insertion plate 405 is restricted inside the clamping block 401 by the magnetic attraction of the magnetic sheet 406. The detachable design allows the doctor to easily separate or combine the puncture syringe 402 and the mounting base 4 without complex tools, greatly simplifying the operation steps.

[0033] In an alternative embodiment, the number of insertion plates 405 is two, and the insertion plates 405 are evenly distributed on the upper and lower sides of the right surface of the puncture syringe 402. The material of the insertion plate 405 is a metal that can be magnetically attracted, and the insertion plate 405 rotates counterclockwise into the clamping block 401 and is magnetically attracted and fixed by the magnetic sheet 406.

[0034] In this embodiment: The magnetic attraction fixing method utilizes the characteristics of the metal material of the insertion plate 405 and the magnetic sheet 406, enabling the puncture syringe 402 to be automatically attracted instantly when it comes into contact with the mounting base 4, ensuring the stability and accuracy of the installation, and at the same time avoiding the cumbersome rotation operation in the traditional thread fixing method.

[0035] Working principle: When in use, place the leg of the patient from whom fluid needs to be extracted on the thigh pad 101 at the top of the base 1. At this time, the patient's thigh is placed on the top of the thigh pad 101, and the calf is placed on the top of the calf pad 2. Subsequently, according to the patient's own needs, adjust the height of the calf pad 2 downward. Start the electric linear actuator 201 at the rear of the base 1. The electric linear actuator 201 drives the calf pad 2 and the slider 202 below the front end face of the calf pad 2 to slide downward, and the slider 202 slides in the chute 103 above the rear side of the base 1 until the patient's leg is bent comfortably. Then, stop the downward retraction of the electric linear actuator 201. Finally, tie the patient's thigh with the strap 102. If the height of the calf pad 2 does not need to be adjusted, also tie the patient's ankle with the strap 102 to prevent the patient's leg from shaking during subsequent fluid extraction.

[0036] Install the puncture syringe 402 into the mounting base 4 on the right side of the base 1. The doctor moves the liquid extraction pump 404 together with the liquid extraction tube 403 connected to the puncture syringe 402 near the mounting base 4, inserts the puncture syringe 402 into the inside of the mounting base 4 from right to left, and at the same time ensures that the insertion plate 405 on the outer side of the right side of the puncture syringe 402 is aligned with the upper and lower sides of the right end face of the mounting base 4. When the puncture syringe 402 completely penetrates the mounting base 4, the left end face of the insertion plate 405 contacts the right end face of the mounting base 4. At this time, rotate the puncture syringe 402 counterclockwise. The puncture syringe 402 drives the insertion plate 405 to rotate counterclockwise until the insertion plate 405 is inserted into the clamping blocks 401 on the front and rear sides of the right end face of the mounting base 4. The material of the insertion plate 405 is made of magnetizable metal. When the insertion plate 405 is inserted into the clamping block 401, the magnetic sheet 406 inside the clamping block 401 and the insertion plate 405 are magnetically fixed. At this time, the puncture syringe 402 is fixed inside the mounting base 4 and cannot move horizontally. When taking it out, rotate it clockwise and increase the rotation force to disconnect the magnetic attraction between the magnetic sheet 406 and the insertion plate 405 to extract it.

[0037] After the puncture syringe 402 is installed, the position for the puncture syringe 402 to extract joint effusion can be adjusted. Turn on the ultrasonic probe 407 above the left end face of the mounting base 4. The ultrasonic probe 407 scans the patient's joint and transmits the scanned image to the terminal. Since the ultrasonic probe 407 and the terminal are conventional devices on the market and the present invention does not improve their interiors, no detailed description thereof will be given here. After the doctor observes the effusion position on the terminal and determines the puncture point and depth according to the ultrasonic image, first, the patient's skin needs to be disinfected before puncture, and under real-time ultrasonic guidance, blood vessels and nerves are avoided. Subsequently, the height of the puncture syringe 402 is adjusted. Then, the hydraulic rod 3 is used to control the lateral needle insertion. The hydraulic rod 3 and the drive motor 304 control the left-right direction and the up-down direction of the puncture syringe 402. In the first step, the height of the puncture syringe 402 is adjusted. The drive motor 304 at the front side of the top of the bottom plate 302 is started. The drive motor 304 drives the bidirectional threaded rod 306 at the output end to rotate. The bidirectional threaded rod 306 located inside the hollow shell 303 is in a screw connection with the moving block 307. Therefore, when the bidirectional threaded rod 306 rotates, the moving block 307 slides horizontally back and forth inside the hollow shell 303. The support rod 308 at the top of the moving block 307 drives the top plate 305 and the mounting base 4 on the top of the top plate 305 to move in height. When the moving block 307 moves toward the front and back sides, the mounting base 4 moves downward; when the moving block 307 moves toward the center direction, the mounting base 4 moves upward. After adjusting the height of the mounting base 4, the drive motor 304 is turned off, and the hydraulic rod 3 is started. The hydraulic rod 3 drives the bottom plate 302 to move from right to left through the connecting rod 301. At this time, the needle at the left top end of the puncture syringe 402 is inserted into the patient's joint at a uniform speed from right to left. When the needle reaches the effusion position, the hydraulic pump is started. The suction force generated by the hydraulic pump reaches directly into the puncture syringe 402 through the liquid extraction tube 403, and then through the needle at the left end face of the puncture syringe 402, the effusion is extracted into the puncture syringe 402 and then enters the liquid extraction pump 404 through the liquid extraction tube 403. After the extraction is completed, the liquid extraction pump 404 is turned off, and the hydraulic rod 3 is started to move the puncture syringe 402 to the right to separate the needle from the patient's joint. Then, the strap 102 tied to the patient's thigh is untied.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultrasound-guided joint puncture device for diagnosing rheumatic and immune diseases, comprising a base (1), characterized in that: A thigh pad (101) is fixedly connected to the top of the left side of the base (1), a slide groove (103) is provided at the rear of the upper side of the base (1), an electric linear drive (201) is fixedly connected to the middle of the right side of the base (1), an output end of the electric linear drive (201) is fixedly connected to a calf pad (2), a strap (102) is fixedly connected to the front side of the top of the thigh pad (101) and the rear side of the top of the calf pad (2), and a slider (202) is fixedly connected to the lower front end of the calf pad (2); A hydraulic rod (3) is fixedly connected to the front side of the right end face of the base (1); an output end of the hydraulic rod (3) is fixedly connected to a connecting rod (301); an end of the connecting rod (301) away from the hydraulic rod (3) is fixedly connected to a bottom plate (302); a hollow shell (303) is fixedly connected to the top of the bottom plate (302); a driving motor (304) is fixedly connected to the front face of the hollow shell (303); an output end of the driving motor (304) is fixedly connected to a bidirectional threaded rod (306); and a movable rod (306) is spirally connected to the outer side of the bidirectional threaded rod (306). A movable block (307) is provided, wherein the top end of the movable block (307) is rotatably connected to a support rod (308), an end of the support rod (308) away from the movable block (307) is rotatably connected to a top plate (305), a mounting seat (4) is fixedly connected to the top of the top plate (305), a puncture syringe (402) is slidably connected inside the mounting seat (4), a right end surface of the puncture syringe (402) is fixedly connected to a liquid extraction tube (403), and an end of the liquid extraction tube (403) away from the puncture syringe (402) is fixedly connected to a liquid extraction pump (404).

2. The ultrasound-guided joint puncture device for diagnosing rheumatic and immune diseases according to claim 1, characterized in that: The rear end surface of the thigh pad (101) contacts the front end surface of the calf pad (2); the end of the bidirectional threaded rod (306) away from the drive motor (304) is rotatably connected to the middle of the rear interior of the hollow shell (303); the outer side of the moving block (307) is slidably connected to the inner wall of the hollow shell (303); and the outer side of the support rod (308) is slidably connected to the middle of the upper interior of the hollow shell (303).

3. The ultrasound-guided joint puncture device for diagnosing rheumatic and immune diseases according to claim 1, characterized in that: The top of the hollow shell (303) is parallel to the top of the thigh pad (101), and a through slot extending from front to back is provided in the middle of the upper part of the hollow shell (303), and the width of the through slot in the middle of the upper part of the hollow shell (303) matches the cross-sectional diameter of the support rod (308).

4. The ultrasound-guided joint puncture device for diagnosing rheumatic and immune diseases according to claim 1, characterized in that: The driving motor (304) can rotate forward and reverse, and a rotating shaft is provided between the top of the moving block (307) and the bottom of the support rod (308), and between the bottom of the top plate (305) and the top of the support rod (308), and the rotation angle of the rotating shaft is limited to 90°.

5. The ultrasound-guided joint puncture device for diagnosing rheumatic and immune diseases according to claim 1, characterized in that: A through hole extending from front to back is provided in the middle of the mounting seat (4), and the diameter of the through hole in the middle of the mounting seat (4) matches the diameter of the cross section of the puncture needle barrel (402).

6. The ultrasound-guided joint puncture device for diagnosing rheumatic and immune diseases according to claim 1, characterized in that: Soft pads are provided on the tops of the thigh pad (101) and the calf pad (2), and the length of the thigh pad (101) is consistent with the length of the calf pad (2), and the maximum height to which the calf pad (2) is raised by the electric linear drive (201) is consistent with the height of the thigh pad (101).

7. The ultrasound-guided joint puncture device for diagnosing rheumatic and immune diseases according to claim 1, characterized in that: The cross-sectional shape of the slider (202) is convex, the slider (202) slides in the slide groove (103) at the upper rear side of the base (1), and the cross-sectional shape of the slide groove (103) at the upper rear side of the base (1) matches the cross-sectional shape of the slider (202).

8. The ultrasound-guided joint puncture device for diagnosing rheumatic and immune diseases according to claim 1, characterized in that: A clamping block (401) is fixedly connected to both sides of the right end of the mounting seat (4), a magnetic sheet (406) is fixedly connected to the right side of the inside of the clamping block (401), a plug plate (405) is fixedly connected to the right surface of the puncture needle tube (402), the outer side of the plug plate (405) is slidably connected to the inner side of the clamping block (401), the left end surface of the magnetic sheet (406) is magnetically fixed to the right end surface of the plug plate (405), and an ultrasonic probe (407) is fixedly connected to the upper part of the left end surface of the mounting seat (4).

9. The ultrasound-guided joint puncture device for diagnosing rheumatic and immune diseases according to claim 8, characterized in that: The number of the plug plates (405) is two, and the plug plates (405) are evenly distributed on the upper and lower sides of the right surface of the puncture needle barrel (402). The material of the plug plates (405) is a metal that can be magnetically attracted, and the plug plates (405) rotate counterclockwise into the card block (401) and are magnetically attracted and fixed by the magnetic sheet (406).

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