Monitoring and protecting device for preventing and treating formation of arteriovenous fistula aneurysm

Abstract

The utility model discloses an internal arteriovenous fistula internal diameter monitoring and protecting device which comprises a controller and a multifunctional cuff, and the controller is composed of a bandage, a hook-and-loop fastener, a plastic shell, a power button, a touch display screen, a charging interface, an air path interface, a circuit interface, a lithium battery, a single-chip microcomputer, an audio output module, a linear motor, a miniature air pump and a miniature electromagnetic valve. The multifunctional oversleeve is composed of an oversleeve body, a hook-and-loop fastener, an air channel connecting pipe, a circuit connecting pipe, an air bag, an MEMS ultrasonic patch, a flexible film temperature sensor and a graphene far infrared patch, and the circuit connecting pipe and the air channel connecting pipe of the multifunctional cuff are connected with a circuit interface and an air channel interface of the controller respectively. The pressure applied to the internal arteriovenous fistula is adjusted by detecting the inner diameter of the internal arteriovenous fistula, and meanwhile, the internal arteriovenous fistula is irradiated by infrared rays, so that the internal arteriovenous fistula can be monitored and maintained for a long time, and the formation of internal arteriovenous fistula aneurysm is prevented and treated.

Description

Technical Field

[0001] This utility model relates to the field of wearable medical device technology, and in particular to a device for monitoring and maintaining the internal diameter of arteriovenous fistula. Background Technology

[0002] Maintenance hemodialysis is an effective way to prolong the lives of uremia patients and improve their quality of life. Autogenous arteriovenous fistula (AVF) is the preferred vascular access for maintenance hemodialysis, offering advantages such as long lifespan, few complications, and good patency. Aneurysms are one of the most common long-term complications of AVF, not only affecting the aesthetics of the patient's arm but also increasing the burden on the heart due to prolonged increased blood flow, leading to heart failure. Furthermore, aneurysms carry a high risk of rupture and massive hemorrhage, which can be life-threatening. In addition, aneurysms larger than 3 cm require surgical resection, increasing patient suffering and financial burden. Existing AVF monitoring devices cannot meet the requirements for real-time temperature adjustment of the fistula and are difficult to monitor and maintain long-term. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to provide a device for monitoring and maintaining the diameter of arteriovenous fistulas (AVFs). It directly monitors the diameter of the arteries and veins through a MEMS ultrasonic patch and maintains the fistula through a graphene far-infrared patch. This device enables long-term monitoring and maintenance of the AVF diameter, helping patients prevent and assist in the treatment of AVF aneurysms.

[0004] Technical solution: A monitoring and protection device for preventing the formation of arteriovenous fistula aneurysms, comprising:

[0005] The controller includes a first Velcro strap, a strap, a plastic housing, an air inlet, a circuit interface, a touch screen, a power button, a charging interface, a microcontroller, a lithium battery, an audio output module, a linear motor, a micro air pump, and a micro solenoid valve. The first Velcro strap is located at both ends of the strap. The strap is connected to the plastic housing. The touch screen is embedded in the upper surface of the plastic housing. The power button and the charging interface are located on the left side of the plastic housing. The air inlet and the circuit interface are located on the right side of the plastic housing. The microcontroller, the lithium battery, the audio output module, the linear motor, the micro air pump, and the micro solenoid valve are all located inside the plastic housing, and are located below the microcontroller. The touch screen, the power button, the charging interface, the circuit interface, the lithium battery, the audio output module, the linear motor, the micro air pump, and the micro solenoid valve are all connected to the microcontroller.

[0006] A multifunctional sleeve includes a sleeve, an airbag, a second Velcro strap, a flexible thin-film temperature sensor, a MEMS ultrasonic patch, a graphene far-infrared patch, an air path connecting tube, and a circuit connecting tube. The second Velcro strap is placed at both ends of the sleeve. The airbag is placed inside the sleeve. The flexible thin-film temperature sensor, the MEMS ultrasonic patch, and the graphene far-infrared patch are all placed on the lower surface of the sleeve, with the MEMS ultrasonic patch positioned to the right of the flexible thin-film temperature sensor and the graphene far-infrared patch positioned to the right of the MEMS ultrasonic patch. One end of the air path connecting tube passes through the sleeve and connects to the airbag. One end of the circuit connecting tube passes through the sleeve and connects to the flexible thin-film temperature sensor, the MEMS ultrasonic patch, and the graphene far-infrared patch.

[0007] The other end of the gas connection pipe is connected to the gas interface; the other end of the circuit connection pipe is connected to the circuit interface.

[0008] Furthermore, the strap is connected to the plastic shell via a buckle structure; the first Velcro is connected to the strap by stitching; the second Velcro, the flexible thin-film temperature sensor, the MEMS ultrasonic patch, and the graphene far-infrared patch are all connected to the sleeve by stitching.

[0009] Furthermore, the straps and sleeves are both made of nylon; the airbag is made of polyvinyl chloride; and the airway connecting tube is made of polyurethane.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. The multifunctional cuff of the present invention is made of flexible material, which can perfectly fit arteriovenous fistulas of different positions and sizes, improving applicability and comfort; the controller and the multifunctional cuff adopt a separate structure, which is convenient for adjustment and maintenance.

[0012] 2. This invention directly monitors the internal diameter of arteriovenous fistulas (AVFs) using a MEMS ultrasonic patch. When the AVF diameter exceeds the upper limit, the fistula is compressed by applying pressure to reduce the diameter; when the AVF diameter is below the lower limit, the fistula is dilated by releasing pressure to increase the diameter. Furthermore, it can provide voice prompts to the patient and trigger an alarm.

[0013] 3. This invention maintains arteriovenous fistulas using graphene far-infrared patches and monitors the fistula temperature using a flexible thin-film temperature sensor. When the temperature exceeds a set value, the graphene far-infrared patch is turned off.

[0014] 4. This device is also equipped with an infrared irradiation function, which can be turned on freely. Through the thermal effect, it promotes local blood circulation, accelerates metabolism, and helps relieve pain and inflammation caused by dialysis puncture, etc.

[0015] 5. As an auxiliary device, this invention can be used to help patients prevent and assist in the treatment of AVF aneurysms; it is simple to operate, lightweight and portable, and can achieve long-term monitoring and maintenance of the arteriovenous fistula diameter, making it suitable for use by a wide range of maintenance hemodialysis patients. Attached Figure Description

[0016] Figure 1 A schematic diagram illustrating the effect of wearing this utility model on the arm;

[0017] Figure 2 This is a schematic diagram of the external structure of the controller;

[0018] Figure 3 This is a schematic diagram of the internal structure of the controller;

[0019] Figure 4 This is a structural diagram of a multifunctional sleeve;

[0020] Figure 5 This is a schematic diagram illustrating the working principle of this utility model;

[0021] In the diagram: 1-Controller; 2-Air circuit connection pipe; 3-Circuit circuit connection pipe; 4-Multifunctional sleeve; 5-First Velcro strap; 6-Strap; 7-Plastic shell; 8-Air circuit interface; 9-Circuit circuit interface; 10-Touch display screen; 11-Power button; 12-Charging interface; 13-Microcontroller; 14-Lithium battery; 15-Audio output module; 16-Linear motor; 17-Miniature air pump; 18-Miniature solenoid valve; 19-Sleeve; 20-Airbag; 21-Second Velcro strap; 22-Flexible thin film temperature sensor; 23-MEMS ultrasonic patch; 24-Graphene far-infrared patch. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figure 1 As shown, the arteriovenous fistula diameter monitoring and protection device described in this application includes:

[0024] like Figure 2 and Figure 3As shown, the controller 1 includes a first Velcro strap 5, a strap 6, a plastic housing 7, an air inlet 8, a circuit interface 9, a touch screen 10, a power button 11, a charging interface 12, a microcontroller 13, a lithium battery 14, an audio output module 15, a linear motor 16, a micro air pump 17, and a micro solenoid valve 18; the first Velcro strap 5 is placed at both ends of the strap 6; the strap 6 is connected to the plastic housing 7; the touch screen 10 is embedded in the upper surface of the plastic housing 7; the power button 11 and the charging interface 12 are located on the left side of the plastic housing 7; the air inlet 8 and the circuit interface 9 are located on the left side of the plastic housing 7. On the other side of the plastic casing 7, the microcontroller 13, lithium battery 14, audio output module 15, linear motor 16, micro air pump 17, and micro solenoid valve 18 are all located inside the plastic casing 7. The lithium battery 14, audio output module 15, linear motor 16, micro air pump 17, and micro solenoid valve 18 are all located below the microcontroller 13. The touch screen 10, power button 11, charging interface 12, circuit interface 9, lithium battery 14, audio output module 15, linear motor 16, micro air pump 17, and micro solenoid valve 18 are all connected to the microcontroller 13.

[0025] like Figure 4 As shown, the multifunctional sleeve 4 includes a sleeve 19, an airbag 20, a second Velcro 21, a flexible thin-film temperature sensor 22, a MEMS ultrasonic patch 23, and a graphene far-infrared patch 24; the second Velcro 21 is placed at both ends of the sleeve 19; the airbag 20 is placed inside the sleeve 19; the flexible thin-film temperature sensor 22, the MEMS ultrasonic patch 23, and the graphene far-infrared patch 24 are arranged sequentially on the lower surface of the sleeve 19; one end of the air path connecting tube 2 passes through the sleeve 19 and is connected to the airbag 20, and the other end of the air path connecting tube 2 is connected to the air path interface 8; one end of the circuit connecting tube 3 passes through the sleeve 19 and is connected to the flexible thin-film temperature sensor 22, the MEMS ultrasonic patch 23, and the graphene far-infrared patch 24 respectively, and the other end of the circuit connecting tube 3 is connected to the circuit interface 9.

[0026] The straps 6 and sleeves 19 are made of nylon; the airbag 20 is made of polyvinyl chloride; and the air connection tube 2 is made of polyurethane.

[0027] The aforementioned strap 6 is connected to the plastic shell 7 via a buckle structure; the first Velcro 5 is connected to the strap (6) by stitching; the second Velcro 21, the flexible thin film temperature sensor 22, the MEMS ultrasonic patch 23, and the graphene far-infrared patch 24 are all connected to the sleeve 19 by stitching.

[0028] like Figure 5 As shown, the working principle of this invention is as follows:

[0029] A) Monitoring and maintenance of arteriovenous fistula diameter: The controller 1 sets the upper limit, lower limit, and normal value of the arteriovenous fistula diameter; the MEMS ultrasonic patch 21 collects the arteriovenous fistula diameter data and transmits it to the microcontroller 13. The microcontroller 13 compares the collected arteriovenous fistula diameter data with the set upper and lower limits; when the fistula diameter exceeds the set upper limit, the microcontroller 13 simultaneously sends signals to the linear motor 16 and the micro air pump 17. The linear motor 16 vibrates as a reminder, and the micro air pump 17 inflates the air bag 20. The arteriovenous fistula is compressed until the diameter of the arteriovenous fistula is compressed to a normal value as detected by the MEMS ultrasonic patch 23. At this point, the micro air pump 17 stops inflating the airbag 20. When the inner diameter of the fistula is less than the set lower limit, the microcontroller 13 simultaneously sends signals to the linear motor 15 and the micro solenoid valve 18. The linear motor 16 generates a vibration reminder, and the micro solenoid valve 18 deflates the airbag 20 until the diameter of the arteriovenous fistula is restored to a normal value as detected by the MEMS ultrasonic patch 23. At this point, the micro solenoid valve 18 stops deflating the airbag 20.

[0030] B) Far-infrared maintenance of arteriovenous fistula: A normal value for the temperature of the arteriovenous fistula is set in the controller 1; the flexible film temperature sensor 22 detects the temperature of the arteriovenous fistula and transmits it to the microcontroller 13. The microcontroller 13 compares the temperature of the arteriovenous fistula with the set normal value: when the fistula temperature is lower than the normal value, the microcontroller 13 sends a signal to the graphene far-infrared patch 24, and the graphene far-infrared patch 24 maintains the arteriovenous fistula by infrared irradiation; when the flexible film temperature sensor 22 detects that the temperature exceeds the set normal value, the graphene far-infrared patch 24 is turned off.

[0031] Furthermore, the aforementioned AVF diameter monitoring and maintenance function and AVF far-infrared maintenance function can both be individually controlled to be turned on or off.

[0032] The AVF inner diameter detected by the MEMS ultrasonic patch 21 and the AVF temperature detected by the flexible thin film temperature sensor 22 will both be displayed on the touch screen 10 and output through the audio output module.

[0033] The detection frequencies of the aforementioned MEMS ultrasonic patch and flexible thin film temperature sensor can both be set individually.

[0034] The aforementioned microcontroller 13 can store the arteriovenous fistula diameter data detected by the MEMS ultrasonic patch 23, and the artificial intelligence algorithm built into the microcontroller 13 can process and analyze the stored arteriovenous fistula diameter data, periodically provide correction suggestions for the upper and lower limits of the arteriovenous fistula diameter, and predict and evaluate the status of the arteriovenous fistula, especially the formation of aneurysms. When it is assessed that the arteriovenous fistula needs maintenance or that an arteriovenous aneurysm has formed, the touch screen 10 will generate corresponding text prompts, the audio output module 15 will generate corresponding voice prompts, and the linear motor 16 will generate corresponding vibration prompts.

[0035] The user secures the controller 1 to the upper arm using the first Velcro strap 5, and the multi-functional cuff 4 to the arteriovenous fistula using the second Velcro strap 21. The user connects the airway connecting tube 2 to the airway interface 8 and the circuit connecting tube 3 to the circuit interface 9. The user then presses the power button 11 to power on the controller 1 and selects to enable the AVF diameter monitoring and maintenance function and the AVF far-infrared maintenance function. The user sets the upper limit, lower limit, and normal value of the AVF inner diameter, as well as the lower limit and normal value of the AVF temperature, on the controller 1. The MEMS ultrasonic patch 23 collects the AVF inner diameter data. The temperature of the AVF is transmitted to the microcontroller 13. At the same time, the flexible thin film temperature sensor 22 detects the AVF temperature and transmits it to the microcontroller 13. When the inner diameter of the AVF is greater than the set upper limit value, the linear motor 16 vibrates to remind the user. At the same time, the micro air pump 17 inflates the airbag 20 and compresses the AVF until the MEMS ultrasonic patch 23 detects that the AVF diameter has reached the normal value. At this time, the micro air pump 17 stops inflating the airbag 20. When the inner diameter of the AVF is less than the set lower limit value, the linear motor 16 vibrates to remind the user. At the same time, the micro solenoid valve 18 depressurizes the airbag 20. The arteriovenous fistula (AVF) is dilated until the MEMS ultrasonic patch 23 detects that the AVF diameter has reached the normal value. At this time, the micro solenoid valve 18 stops depressurizing the airbag 20. At the same time, the flexible film temperature sensor 22 detects the AVF temperature. When the AVF temperature is lower than the set normal value, the graphene far-infrared patch 24 maintains the AVF by irradiating it with infrared rays. When the flexible film temperature sensor 22 detects that the fistula temperature exceeds the set normal value, the graphene far-infrared patch 24 is turned off.

[0036] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. The embodiments selected and specifically described in this specification are intended to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of the invention, should be covered within the protection scope of this invention.

Claims

1. A monitoring and protection device for the prevention of aneurysm formation in an arteriovenous fistula, characterized in that, include: The controller (1) includes a first Velcro strap (5), a strap (6), a plastic shell (7), an air inlet (8), a circuit interface (9), a touch screen (10), a power button (11), a charging interface (12), a microcontroller (13), a lithium battery (14), an audio output module (15), a linear motor (16), a micro air pump (17), and a micro solenoid valve (18); the first Velcro strap (5) is placed at both ends of the strap (6); the strap (6) is connected to the plastic shell (7); the touch screen (10) is embedded in the upper surface of the plastic shell (7); the power button (11) and the charging interface (12) are placed on the left side of the plastic shell (7); the air inlet (8) and the circuit interface (9) are placed on the right side of the plastic shell (7). Side view; the microcontroller (13), the lithium battery (14), the audio output module (15), the linear motor (16), the micro air pump (17), and the micro solenoid valve (18) are all placed inside the plastic shell (7), and the lithium battery (14), the audio output module (15), the linear motor (16), the micro air pump (17), and the micro solenoid valve (18) are all placed below the microcontroller (13); the touch screen (10), the power button (11), the charging interface (12), the circuit interface (9), the lithium battery (14), the audio output module (15), the linear motor (16), the micro air pump (17), and the micro solenoid valve (18) are all connected to the microcontroller (13); A multifunctional sleeve (4) includes a sleeve (19), an airbag (20), a second Velcro strap (21), a flexible thin-film temperature sensor (22), a MEMS ultrasonic patch (23), a graphene far-infrared patch (24), an air path connecting tube (2), and an electrical connection tube (3); the second Velcro strap (21) is placed at both ends of the sleeve (19); the airbag (20) is placed inside the sleeve (19); the flexible thin-film temperature sensor (22), the MEMS ultrasonic patch (23), and the graphene far-infrared patch (24) are all placed inside the sleeve (19). On the lower surface of the sleeve (19), the MEMS ultrasonic patch (23) is placed to the right of the flexible thin film temperature sensor (22), and the graphene far-infrared patch (24) is placed to the right of the MEMS ultrasonic patch (23); one end of the air path connecting pipe (2) passes through the sleeve (19) and is connected to the airbag (20); one end of the circuit connecting pipe (3) passes through the sleeve (19) and is connected to the flexible thin film temperature sensor (22), the MEMS ultrasonic patch (23), and the graphene far-infrared patch (24). The other end of the gas connection pipe (2) is connected to the gas interface (8); the other end of the circuit connection pipe (3) is connected to the circuit interface (9).

2. The protection device according to claim 1, characterized in that, The strap (6) is connected to the plastic shell (7) by a buckle structure; the first Velcro (5) is connected to the strap (6) by stitching; the second Velcro (21), the flexible thin film temperature sensor (22), the MEMS ultrasonic patch (23) and the graphene far-infrared patch (24) are all connected to the sleeve (19) by stitching.

3. The protection device according to claim 1, characterized in that, The straps (6) and sleeves (19) are both made of nylon; the airbag (20) is made of polyvinyl chloride; and the airway connecting pipe (2) is made of polyurethane.

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