Portable arteriovenous fistula auscultation terminal and auscultation system

Abstract

The application relates to the technical field of medical devices, and discloses a portable arteriovenous fistula auscultation terminal and an auscultation system, which comprises a body box, a control box fixedly installed at the middle of the upper end face of the body box, installation boxes fixedly installed at the front and rear end faces of the body box, limit rods slidingly installed at the front and rear sides of the lower end face of the body box, and a sticking pad fixedly installed at the lower end face of the limit rod. The auscultation system further comprises a supporting mechanism arranged at the left and right side walls of the body box, an adjusting mechanism arranged at the inner cavities of the body box, an adsorption mechanism arranged at the left and right side walls of the body box, and a buffer mechanism. The distance between the two supporting rods can be adjusted through the adjusting mechanism, so that the device is suitable for users with different body sizes. Through the arrangement of the supporting mechanism and the adsorption mechanism, the whole device can be stably placed on a table top, so that the stability of the device during use is improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a portable arteriovenous fistula auscultation terminal and auscultation system. Background Technology

[0002] Arteriovenous fistula (AVC) is a surgical procedure performed on arteries and veins, primarily for hemodialysis. AVC surgery is a minor surgical procedure involving the anastomosis of an artery and a nearby vein in the forearm near the wrist. This allows arterial blood to flow through the anastomosed vein, forming an AVC fistula. The fistula provides sufficient blood for hemodialysis, ensuring the adequacy of the treatment. AVC is a lifeline for patients with kidney failure; its patency directly determines the success and quality of dialysis. Before hemodialysis, medical staff typically use a stethoscope to assess the patency of the AVC in patients with kidney failure. A louder thrill sound indicates better patency.

[0003] Because the auscultation area of ​​a conventional stethoscope is flat and doesn't fit snugly against the patient's wrist, the vascular thrill sound is often faint or absent. This prevents medical staff from promptly assessing the condition of the arteriovenous fistula, hindering further treatment. Furthermore, since each patient's arm size varies, adjusting the fit is necessary to meet the auscultation needs of different patients. Therefore, there is an urgent need for a portable arteriovenous fistula auscultation terminal and system to solve these problems. Summary of the Invention

[0004] The purpose of this invention is to provide a portable arteriovenous fistula auscultation terminal and auscultation system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a portable arteriovenous fistula auscultation terminal and auscultation system, comprising a housing, a control box fixedly installed in the middle of the upper end face of the housing, mounting boxes fixedly installed on the front and rear end faces of the housing, the lower end face of the housing being an arc surface, and limit rods slidably installed on the front and rear sides of the lower end face of the housing, with an adhesive pad fixedly installed on the lower end face of the limit rods, and further comprising:

[0006] A support mechanism is provided on the front and rear sides of the left and right side walls of the body box, and the support mechanism is used to provide support for the body box;

[0007] An adjustment mechanism is provided on both the front and rear sides of the inner cavity of the body box, and the adjustment mechanism is used to adjust the distance between the two side support mechanisms;

[0008] An adsorption mechanism is provided on the left and right sides of the side wall of the body box. The adsorption mechanism is used to improve the stability of the support mechanism.

[0009] A buffer mechanism is disposed in the inner cavity of the control box, and the buffer mechanism is used to stably adhere the patch to the arm.

[0010] Preferably, the support mechanism includes a connecting rod slidably mounted on the left and right end faces of the body box, and an air storage cover fixedly mounted on the side wall of the connecting rod. A support sleeve is slidably mounted on the lower end face of the air storage cover, a support rod is threadedly mounted on the inner cavity of the support sleeve, and a foot pad is fixedly mounted on the lower end face of the support rod.

[0011] Preferably, the adjustment mechanism includes positioning sleeves rotatably mounted on the front and rear sides of the inner cavity of the machine body box, positioning rods slidably mounted on the left and right sides of the positioning sleeves, the outer ends of the positioning rods threaded through the machine body box and rotatably connected to the air storage cover, and an adjustment worm gear fixedly mounted in the middle of the side wall of the positioning sleeve.

[0012] Preferably, an adjusting motor is fixedly mounted on the bottom surface of the inner cavity of the mounting box via a frame, and an adjusting worm is fixedly mounted through the output shaft end of the adjusting motor through the mounting box. The adjusting worm is meshed with an adjusting worm wheel, and the left and right ends of the positioning rod have opposite thread directions.

[0013] Preferably, the adsorption mechanism includes a piston plate slidably installed in the inner cavity of the gas storage hood, a support sleeve fixedly installed on the lower end face of the piston plate, a connecting channel opened in the inner cavity of the support rod, an air inlet hole opened in the upper side wall of the support sleeve, the support sleeve communicating with the foot cover through the air inlet hole and the connecting channel, and an adsorption spring wound around the upper side wall of the support sleeve, one end of the adsorption spring being fixedly installed on the lower end face of the piston plate, and the other end being fixedly installed on the bottom surface of the inner cavity of the gas storage hood.

[0014] Preferably, the inner cavity of the connecting channel is provided with a one-way valve that leads to the lower cavity of the gas storage hood, and an air outlet is provided on the outer wall of the gas storage hood, with a one-way valve leading to the outside of the air outlet.

[0015] Preferably, the buffer mechanism includes a buffer plate slidably installed inside the control box cavity, and an extension rod fixedly installed on the lower end face of the buffer plate. A buffer spring is wound and installed on the side wall of the extension rod, and a sliding groove is provided on the rear end face of the control box.

[0016] Preferably, the extension rod is fixedly installed on the upper end face of the patch, one end of the buffer spring is fixedly installed on the bottom surface of the inner cavity of the control box, the other end of the buffer spring is fixedly installed on the lower end face of the buffer plate, and a PCB circuit board is fixedly installed on the upper end face of the buffer plate.

[0017] Preferably, a sound guide tube is fixedly installed on the rear side of the upper end face of the buffer plate, a sound storage device is fixedly installed at the end of the sound guide tube, a stethoscope head is fixedly installed on the side wall of the sound storage device, a battery is fixedly installed on the front side of the upper end face of the body box, a display is fixedly installed on the upper end face of the control box, a microphone is fixedly installed on the inner side wall of the patch, the display, PCB circuit board, sound storage device and battery are electrically connected, the sound guide tube slides in the inner cavity of the slide groove, and a winding post is fixedly installed on the rear side of the upper end face of the body box.

[0018] A portable arteriovenous fistula auscultation terminal auscultation system includes an auscultation system module, which consists of a microprocessor, a power supply module, an amplifier circuit module, and a signal transmission module. The microprocessor, power supply module, amplifier circuit module, and signal transmission module are all fixedly mounted on the upper surface of a PCB circuit board. The microphone, sound tube, power supply module, amplifier circuit module, and signal transmission module are all electrically connected to the microprocessor.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In this invention, medical personnel can start the adjusting motor to rotate the adjusting worm gear. Since the adjusting worm gear is fixedly connected to the positioning sleeve, the positioning sleeve can then rotate the positioning rod. The positioning rod is threadedly connected to the body box, with the threads on the left and right ends of the positioning rod in opposite directions. Under the constraint of multiple sets of limiting rods, the positioning rod will retract into the inner cavity of the positioning sleeve. At this time, the distance between the left and right air storage hoods will change, thereby adjusting the support distance of the foot pad cover. Through the threaded connection between the support sleeve and the support rod, medical personnel can lock the support sleeve with one hand and rotate the support rod with the other hand to adjust the height of the air storage hood. This makes the entire device suitable for people with different arm sizes, greatly improving the practicality of the entire device.

[0021] 2. In this invention, after the medical staff adjusts the height of the device box, they place the patient's arm on the table and then place the entire device above the patient's arm. At this time, the foot pad will rest against the table. Under the gravity of the device box and the pulling force of the suction spring, the air storage cover will move downwards a certain distance. At this time, the volume of the lower cavity of the air storage cover will continuously increase. The air in the foot pad can enter the lower cavity of the air storage cover through the connecting channel on the support rod and the air inlet on the support sleeve to achieve air pressure equalization in the lower cavity of the air storage cover. However, at this time, the foot pad will be in a negative pressure state between the foot pad and the table, which can ensure the stability of the support rod and effectively prevent the device from shaking due to the patient's unintentional movement during treatment, thus preventing the device from falling off the table and ensuring the effectiveness of the medical staff's treatment of the patient.

[0022] 3. In this invention, after the body box is placed, the extension rod can slide downwards under the action of the buffer spring, so that the dressing pad can be firmly attached to the patient's arm. The microphone can transmit the collected sound signal to the microprocessor, and after being processed by the signal transmission module and amplification circuit, the electrical signal can be transmitted to the sound storage device through the sound tube. When the medical staff wears the stethoscope head, they can infer and analyze the patient's physical condition, or the electrical signal processed by the transmission module and amplification circuit can be transmitted to the display for the patient to understand intuitively. Attached Figure Description

[0023] Figure 1 This is a frontal view of the overall structure of a portable arteriovenous fistula auscultation terminal and auscultation system according to the present invention;

[0024] Figure 2 This is a rear view schematic diagram of the overall structure of a portable arteriovenous fistula auscultation terminal and auscultation system according to the present invention.

[0025] Figure 3 This is a top-view schematic diagram of the overall structure of a portable arteriovenous fistula auscultation terminal and auscultation system according to the present invention.

[0026] Figure 4 This is a top-view partial sectional view of the portable arteriovenous fistula auscultation terminal and auscultation system of the present invention.

[0027] Figure 5 This is a partial sectional view of the side structure of a portable arteriovenous fistula auscultation terminal and auscultation system of the present invention.

[0028] Figure 6 This is a schematic cross-sectional view of the air reservoir of a portable arteriovenous fistula auscultation terminal and auscultation system according to the present invention.

[0029] Figure 7 This is a schematic diagram of the system connection framework of a portable arteriovenous fistula auscultation terminal and auscultation system according to the present invention.

[0030] In the diagram: 1. Main body box; 2. Control box; 21. Slide groove; 22. Display; 3. Mounting box; 4. Limiting rod; 5. Adhesive pad; 51. Microphone; 6. Support mechanism; 61. Connecting rod; 62. Air reservoir; 621. Air outlet; 63. Support sleeve; 631. Air inlet; 632. Adsorption spring; 64. Support rod; 641. Connecting channel; 65. Foot cover; 7. Adjustment mechanism; 71. Positioning sleeve; 72. Positioning rod; 73. Adjusting worm gear; 74. Adjusting motor; 75. Adjusting worm; 8. Piston plate; 9. Buffer mechanism; 91. Buffer plate; 911. PCB circuit board; 92. Extension rod; 93. Buffer spring; 94. Sound guide tube; 95. Sound storage device; 96. Stethoscope head; 97. Battery; 98. Winding post. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-7 This invention provides a portable arteriovenous fistula auscultation terminal and auscultation system technical solution: It includes a housing 1, a control box 2 fixedly installed in the middle of the upper end face of the housing 1, mounting boxes 3 fixedly installed on the front and rear end faces of the housing 1, the lower end face of the housing 1 being an arc surface, and limit rods 4 slidably installed on the front and rear sides of the lower end face of the housing 1, with an adhesive pad 5 fixedly installed on the lower end face of the limit rods 4. It also includes:

[0033] Support mechanism 6 is provided on the front and rear sides of the left and right side walls of the body box 1. Support mechanism 6 is used to provide support for body box 1.

[0034] Adjustment mechanism 7 is located on the front and rear sides of the inner cavity of the body box 1. Adjustment mechanism 7 is used to adjust the distance between the two side support mechanisms 6.

[0035] The adsorption mechanism is located on the left and right sides of the side wall of the body box 1. The adsorption mechanism is used to improve the stability of the support mechanism 6.

[0036] The buffer mechanism 9 is located inside the control box 2 and is used to ensure that the patch 5 is stably attached to the arm.

[0037] Furthermore, the support mechanism 6 includes a connecting rod 61 that is slidably installed on the left and right end faces of the body box 1, and an air storage cover 62 that is fixedly installed on the side wall of the connecting rod 61. A support sleeve 63 is slidably installed on the lower end face of the air storage cover 62, a support rod 64 is threadedly installed in the inner cavity of the support sleeve 63, and a foot pad cover 65 is fixedly installed on the lower end face of the support rod 64.

[0038] The adjustment mechanism 7 includes a positioning sleeve 71 rotatably installed on the front and rear sides of the inner cavity of the body box 1. Positioning rods 72 are slidably installed on the left and right sides of the positioning sleeve 71. The positioning rods 72 and the positioning sleeve 71 are connected by a key and keyway structure. The outer end of the positioning rod 72 is threaded through the body box 1 and rotatably connected to the air storage cover 62. An adjustment worm gear 73 is fixedly installed in the middle of the side wall of the positioning sleeve 71.

[0039] An adjusting motor 74 is fixedly mounted on the bottom surface of the inner cavity of the mounting box 3 via a frame. An adjusting worm 75 is fixedly mounted through the output shaft of the adjusting motor 74 through the mounting box 3. The adjusting worm 75 is meshed with the adjusting worm wheel 73. The left and right ends of the positioning rod 72 have opposite thread directions.

[0040] It should be noted that although the arm thickness varies among people of different body types, the size and shape of the fistulas placed under the skin of their arms are similar. Therefore, although the size of the machine body box 1 does not need to be adjusted during use, the height and distance of the support mechanism 6 will be adjusted according to the user's arm thickness. Medical personnel can start the adjusting motor 74 to make the adjusting worm gear 75 drive the adjusting worm wheel 73 to rotate. Since the adjusting worm wheel 73 is fixedly connected to the positioning sleeve 71, the positioning sleeve 71 can then drive the positioning rod 72 to rotate (the positioning rod 72 and the positioning sleeve 71 are connected by a key, and the positioning sleeve 71 can drive the positioning rod 72 to rotate axially, and can also...). The positioning rod 72 slides within the inner cavity of the positioning sleeve 71. The positioning rod 72 is threadedly connected to the body box 1, with the threads on the left and right ends of the positioning rod 72 facing opposite directions. At this time, the positioning rod 72 will retract into the inner cavity of the positioning sleeve 71. Under the constraint of multiple sets of limiting rods 4, the distance between the left and right sides of the air storage hood 62 will change, thereby adjusting the support distance of the foot pad cover 65. The support sleeve 63 is threadedly connected to the support rod 64. Medical personnel can lock the support sleeve 63 with one hand and rotate the support rod 64 with the other to adjust the height of the air storage hood 62. This makes the entire device suitable for people with different arm sizes, greatly improving the practicality of the entire device.

[0041] Furthermore, the adsorption mechanism includes a piston plate 8 slidably installed in the inner cavity of the gas storage hood 62, a support sleeve 63 fixedly installed on the lower end face of the piston plate 8, a connecting channel 641 opened in the inner cavity of the support rod 64, an air inlet 631 opened on the upper side wall of the support sleeve 63, the support sleeve 63 is connected to the pad cover 65 through the air inlet 631 and the connecting channel 641, and an adsorption spring 632 is wound and installed on the upper side wall of the support sleeve 63. One end of the adsorption spring 632 is fixedly installed on the lower end face of the piston plate 8, and the other end is fixedly installed on the bottom surface of the inner cavity of the gas storage hood 62.

[0042] The inner cavity of the connecting channel 641 is provided with a one-way valve that leads to the lower cavity of the gas storage hood 62. The outer wall of the gas storage hood 62 is provided with an air outlet 621, and the inner cavity of the air outlet 621 is provided with a one-way valve that leads to the outside.

[0043] It should be noted that after the medical staff adjusts the height of the device box 1, they place the patient's arm on the table and then place the entire device above the patient's arm. At this time, the foot cover 65 will be pressed against the table. Under the gravity of the device box 1 and the elastic force of the suction spring 632, the air storage cover 62 will move downward a certain distance. At this time, the volume of the lower cavity of the air storage cover 62 will continuously increase. The air in the foot cover 65 can enter the lower cavity of the air storage cover 62 through the connecting channel 641 on the support rod 64 and the air inlet 631 on the support sleeve 63, so as to achieve equalization of the air pressure in the lower cavity of the air storage cover 62. However, at this time, the foot cover 65 will be in a negative pressure state with the table, which can ensure the stability of the support rod 64, thereby effectively preventing the device from shaking due to the patient's unintentional movement during treatment, avoiding the device from falling off the table, and ensuring the effectiveness of the medical staff's treatment of the patient.

[0044] Furthermore, the buffer mechanism 9 includes a buffer plate 91 that is slidably installed in the inner cavity of the control box 2, and an extension rod 92 that is fixedly installed on the lower end face of the buffer plate 91. A buffer spring 93 is wound and installed on the side wall of the extension rod 92, and a groove 21 is provided on the rear end face of the control box 2.

[0045] The extension rod 92 is fixedly installed on the upper end face of the patch 5, one end of the buffer spring 93 is fixedly installed on the bottom surface of the inner cavity of the control box 2, the other end of the buffer spring 93 is fixedly installed on the lower end face of the buffer plate 91, and a PCB circuit board 911 is fixedly installed on the upper end face of the buffer plate 91.

[0046] A sound guide tube 94 is fixedly installed on the rear side of the upper end face of the buffer plate 91. A sound storage device 95 is fixedly installed at the end of the sound guide tube 94. A stethoscope head 96 is fixedly installed on the side wall of the sound storage device 95. A storage battery 97 is fixedly installed on the front side of the upper end face of the body box 1. A display 22 is fixedly installed on the upper end face of the control box 2. A microphone 51 is fixedly installed on the inner side wall of the patch 5. The display 22, PCB circuit board 911, sound storage device 95 and storage battery 97 are electrically connected. The sound guide tube 94 slides in the inner cavity of the slide groove 21. A winding post 98 is fixedly installed on the rear side of the upper end face of the body box 1.

[0047] It should be noted that after the device box 1 is placed, the extension rod 92 can slide downwards under the action of the buffer spring 93, so that the dressing pad 5 can be firmly attached to the patient's arm (because only the audio of the fistula is collected, the microphone 51 should not be too large. The dressing pad 5 is to keep the device attached to the arm. The microphone 51 can capture Korotkoff sounds of blood flow changes in the blood vessels and, combined with the audio transmission module, transmit the Korotkoff sounds through the wire). The microphone 51 can transmit the collected sound signal to the microprocessor. After being processed by the signal transmission module and the amplification circuit, the electrical signal can be transmitted to the sound storage device 95 through the sound tube 94 (the sound storage device 95 can store the electrical signal in the memory card). When the medical staff wears the stethoscope head 96 (i.e., the audio player, which is electrically connected to the amplification circuit), the patient's physical condition can be obtained by inferring and analyzing the signal. Alternatively, the electrical signal processed by the transmission module and the amplification circuit can be transmitted to the display 22 for the patient to understand intuitively.

[0048] A portable arteriovenous fistula auscultation terminal auscultation system includes an auscultation system module, which consists of a microprocessor, a power supply module, an amplifier circuit module, and a signal transmission module. The microprocessor, power supply module, amplifier circuit module, and signal transmission module are all fixedly mounted on the upper surface of a PCB circuit board 911. The microphone 51, sound tube 94, power supply module, amplifier circuit module, and signal transmission module are all electrically connected to the microprocessor.

[0049] It should be noted that the power module supplies power to the microprocessor (control core), the microphone 51 transmits sound signals to the microprocessor (control core), the microprocessor transmits electrical signals to the signal transmission module (isolation and protocol conversion), the signal transmission module transmits electrical signals to the amplifier circuit module (drive enhancement), the amplifier circuit module transmits electrical signals to the power module (actuator), and the power module is the display 22 and the sound storage device 95.

[0050] Working principle:

[0051] During operation, medical staff can start the adjusting motor 74 to rotate the adjusting worm gear 75, which in turn drives the adjusting worm wheel 73. Since the adjusting worm wheel 73 is fixedly connected to the positioning sleeve 71, the positioning sleeve 71 can then drive the positioning rod 72 to rotate (the positioning rod 72 and the positioning sleeve 71 are connected by a key, allowing the positioning sleeve 71 to drive the positioning rod 72 to rotate axially and slide within the inner cavity of the positioning sleeve 71). The positioning rod 72 is threadedly connected to the body box 1, with the threads on the left and right ends of the positioning rod 72 in opposite directions. At this time, the positioning rod 72 will retract into the inner cavity of the positioning sleeve 71. Under the constraint of multiple sets of limiting rods 4, the distance between the left and right air storage covers 62 will change, thereby adjusting the support distance of the foot pad cover 65. The support sleeve 63 is threadedly connected to the support rod 64, allowing medical staff to lock the support sleeve 63 with one hand and rotate the support rod 64 with the other hand to adjust the height of the air storage cover 62. This makes the entire device suitable for people with different arm sizes, greatly improving its practicality.

[0052] After the medical staff adjusts the height of the device box 1, they place the patient's arm on the table and then place the entire device above the patient's arm. At this time, the foot cover 65 will rest against the table. Under the gravity of the device box 1 and the elastic force of the suction spring 632, the air storage cover 62 will move downward a certain distance. At this time, the volume of the lower cavity of the air storage cover 62 will continuously increase. The air in the foot cover 65 can enter the lower cavity of the air storage cover 62 through the connecting channel 641 on the support rod 64 and the air inlet 631 on the support sleeve 63. This ensures balanced air pressure within the lower cavity of the air reservoir 62. At this time, the foot pad 65 is under negative pressure with respect to the table, guaranteeing the stability of the support rod 64. This effectively prevents the device from shaking due to unintentional movement by the patient during treatment, avoiding the device falling off the table and ensuring the effectiveness of treatment by medical staff. (After treatment, medical staff can lift the machine box 1 upwards to allow excess air in the lower cavity of the air reservoir 62 to escape through the air outlet 621, preparing for the next treatment).

[0053] After the device box 1 is placed, the extension rod 92 can slide downwards with the help of the buffer spring 93, so that the dressing pad 5 can be firmly attached to the patient's arm (because only the audio at the fistula location is collected, the microphone 51 should not be too large. The dressing pad 5 is to keep the device attached to the arm. The microphone 51 can capture Korotkoff sounds of changes in blood flow in the blood vessels and, combined with the audio transmission module, transmits the Korotkoff sounds through the wire). The microphone 51 can transmit the collected sound signal to the microprocessor. After being processed by the signal transmission module and the amplification circuit, the electrical signal can be transmitted to the sound storage device 95 through the sound tube 94 (the sound storage device 95 can store the electrical signal in the memory card). When the medical staff wears the stethoscope head 96, they can infer and analyze the patient's physical condition, or the electrical signal processed by the transmission module and the amplification circuit can be transmitted to the display 22 for the patient to understand intuitively.

[0054] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A portable arteriovenous fistula auscultation terminal, comprising a housing (1), wherein a control box (2) is fixedly installed at the middle of the upper end face of the housing (1), characterized in that: The front and rear end faces of the body box (1) are fixedly mounted with mounting boxes (3), the lower end face of the body box (1) is set as an arc surface, and the front and rear sides of the lower end face of the body box (1) are slidably mounted with limit rods (4), and the lower end face of the limit rods (4) is fixedly mounted with a patch (5), and also includes: Support mechanism (6) is provided on the front and rear sides of the left and right side walls of the body box (1). The support mechanism (6) is used to provide support for the body box (1). Adjustment mechanism (7) is provided on the front and rear sides of the inner cavity of the body box (1). The adjustment mechanism (7) is used to adjust the distance between the two side support mechanisms (6). The adsorption mechanism is set on the left and right sides of the side wall of the body box (1), and the adsorption mechanism is used to improve the stability of the support mechanism (6). A buffer mechanism (9) is provided in the inner cavity of the control box (2) and is used to make the patch (5) fit stably on the arm. The support mechanism (6) includes a connecting rod (61) slidably mounted on the left and right end faces of the body box (1), and an air storage cover (62) fixedly mounted on the side wall of the connecting rod (61). A support sleeve (63) is slidably mounted on the lower end face of the air storage cover (62). A support rod (64) is threadedly mounted on the inner cavity of the support sleeve (63). A foot pad cover (65) is fixedly mounted on the lower end face of the support rod (64). The adjustment mechanism (7) includes a positioning sleeve (71) rotatably installed on the front and rear sides of the inner cavity of the body box (1). Positioning rods (72) are slidably installed on the left and right sides of the positioning sleeve (71). The outer end of the positioning rod (72) is threaded through the body box (1) and rotatably connected to the air storage cover (62). An adjustment worm gear (73) is fixedly installed in the middle of the side wall of the positioning sleeve (71). An adjusting motor (74) is fixedly installed on the bottom surface of the inner cavity of the mounting box (3) via a frame. An adjusting worm (75) is fixedly installed through the output shaft end of the adjusting motor (74) through the mounting box (3). The adjusting worm (75) is meshed with the adjusting worm wheel (73). The left and right ends of the positioning rod (72) have opposite thread directions. The adsorption mechanism includes a piston plate (8) that is slidably installed in the inner cavity of the gas storage hood (62), a support sleeve (63) that is fixedly installed on the lower end face of the piston plate (8), a connecting channel (641) in the inner cavity of the support rod (64), an air inlet (631) in the upper side wall of the support sleeve (63), the support sleeve (63) being connected to the foot cover (65) through the air inlet (631) and the connecting channel (641), and an adsorption spring (632) that is wound around the upper side wall of the support sleeve (63). One end of the adsorption spring (632) is fixedly installed on the lower end face of the piston plate (8), and the other end is fixedly installed on the bottom surface of the inner cavity of the gas storage hood (62). The inner cavity of the connecting channel (641) is provided with a one-way valve that leads to the lower cavity of the gas storage hood (62). An air outlet (621) is provided on the outer wall of the gas storage hood (62). The inner cavity of the air outlet (621) is provided with a one-way valve that leads to the outside. Under the gravity of the body box (1) and the elastic force of the adsorption spring (632), the air storage cover (62) will move downward a certain distance. At this time, the volume of the lower cavity of the air storage cover (62) will continuously increase. The air of the foot cover (65) can enter the lower cavity of the air storage cover (62) through the connecting channel (641) on the support rod (64) and the air inlet (631) on the support sleeve (63).

2. The portable arteriovenous fistula auscultation terminal according to claim 1, characterized in that: The buffer mechanism (9) includes a buffer plate (91) that is slidably installed in the inner cavity of the control box (2) and an extension rod (92) that is fixedly installed on the lower end face of the buffer plate (91). A buffer spring (93) is wound on the side wall of the extension rod (92), and a groove (21) is provided on the rear end face of the control box (2).

3. The portable arteriovenous fistula auscultation terminal according to claim 2, characterized in that: The extension rod (92) is fixedly installed on the upper end face of the patch (5), one end of the buffer spring (93) is fixedly installed on the bottom surface of the inner cavity of the control box (2), the other end of the buffer spring (93) is fixedly installed on the lower end face of the buffer plate (91), and a PCB circuit board (911) is fixedly installed on the upper end face of the buffer plate (91).

4. A portable arteriovenous fistula auscultation terminal according to claim 3, characterized in that: A sound guide tube (94) is fixedly installed on the rear side of the upper end face of the buffer plate (91). A sound storage device (95) is fixedly installed at the end of the sound guide tube (94). A stethoscope head (96) is fixedly installed on the side wall of the sound storage device (95). A storage battery (97) is fixedly installed on the front side of the upper end face of the body box (1). A display (22) is fixedly installed on the upper end face of the control box (2). A microphone (51) is fixedly installed on the inner side wall of the patch (5). The display (22), PCB circuit board (911), sound storage device (95) and storage battery (97) are electrically connected. The sound guide tube (94) slides in the inner cavity of the slide groove (21). A winding post (98) is fixedly installed on the rear side of the upper end face of the body box (1).

5. An auscultation system for a portable arteriovenous fistula auscultation terminal according to claim 4, characterized in that: The system includes an auscultation system module, which consists of a microprocessor, a power supply module, an amplifier circuit module, and a signal transmission module. The microprocessor, power supply module, amplifier circuit module, and signal transmission module are all fixedly mounted on the upper surface of the PCB circuit board (911). The microphone (51), sound tube (94), power supply module, amplifier circuit module, and signal transmission module are all electrically connected to the microprocessor.

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