CN204909456U - Wearable internal arteriovenous fistula blood flow monitor - Google Patents

Abstract

The utility model discloses a wearable internal arteriovenous fistula blood flow monitor, including wrist strap and monitoring devices, monitoring devices fixes on the wrist strap, monitoring devices includes ultrasonic transducer, controller, display screen, acousto -optic warning module, ultrasonic transducer sets up at the wrist strap inboardly, hugs closely internal fistula blood vessel top skin during the use, and ultrasonic transducer's output links to each other with the input of controller, the output of controller links to each other with display screen, acousto -optic warning module respectively, the display screen is used for in real time showing the blood flow volume of the internal fistula of gathering. The utility model discloses a set up the detection that ultrasonic transducer carries out the internal arteriovenous fistula blood flow volume on a wrist strap, have small, portability and wearing, can directly obtain the advantage of data.

Description

Wearable Arteriovenous Fistula Blood Flow Monitor

technical field

The utility model relates to the research field of medical monitoring equipment, in particular to a wearable arteriovenous fistula blood flow monitor.

Background technique

Arteriovenous fistula is a small operation of vascular anastomosis. Specifically, the artery near the wrist of the forearm and the adjacent vein are sutured, so that arterial blood flows in the anastomotic vein, forming an arteriovenous fistula. The blood vessels of the arteriovenous fistula need to provide sufficient blood for the hemodialysis treatment, so as to guarantee the adequacy of the dialysis treatment. For internal fistula to meet the treatment requirements, its blood flow generally needs to reach 250-350ml/s. Therefore, it is necessary to monitor changes in the blood flow of the internal fistula, detect the insufficient blood flow of the internal fistula early, and roughly locate the part with more serious blood flow blockage. for subsequent interventions.

Currently used blood flow detection devices are basically based on electromagnetic measurement, infrared measurement, electrical impedance measurement, injection isotope measurement, nuclear magnetic resonance measurement, and other invasive examinations. The latest indirect monitoring techniques also include laser vibrometers to indirectly measure the magnitude of fistula pulsation velocity, and acoustic detectors to measure the intensity of fistula murmurs. However, the above-mentioned detection devices generally have disadvantages such as larger instruments (such as B-ultrasound machines or MRI machines), invasiveness, and indirect data obtained.

Utility model content

The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art, and provide a wearable arteriovenous fistula blood flow monitor, which is a wearable device that can measure the arteriovenous fistula blood flow in real time and visually , has the advantages of small size, portability, wearability, and visualization.

The purpose of this utility model is achieved through the following technical solutions: a wearable arteriovenous fistula blood flow monitor includes a wristband and a monitoring device, and the monitoring device is fixed on the wristband; the monitoring device includes an ultrasonic probe and a controller , a display screen, and an acousto-optic alarm module, the ultrasonic probe is set on the inner side of the wristband, and is close to the skin above the internal fistula blood vessel when in use, and the output end of the ultrasonic probe is connected to the input end of the controller; the output end of the controller is respectively connected to the display The screen and the sound and light alarm module are connected; the display screen is used to display the blood flow of the internal fistula collected in real time.

Preferably, the wristband is made of anti-allergic silicone material, and its diameter is adjustable. Therefore, it can be adjusted independently according to the thickness of the user's upper limbs, which is more convenient.

Furthermore, the wristband has a buckle and several lock holes, and the lock buckle is fixed in one of the lock holes during monitoring. Thereby realizing the adjustable wrist strap diameter.

Preferably, the ultrasonic probe adopts an ultrasonic sensor with a diameter of less than 20 mm and a model of UMT30. Through the sensor, the frequency above 2MHz can be used for precise positioning and detection of blood flow parameters.

Preferably, the sound and light alarm module includes a warning light and a buzzer, the sound outlets of the warning light and the buzzer are arranged around the display screen, and the warning light and the buzzer are respectively connected to the controller.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. The utility model detects the blood flow of the arteriovenous fistula by setting an ultrasonic probe on a wristband, and has the advantages of small size, portability and wearability, and direct data acquisition.

2. The diameter of the wristband in the utility model can be freely adjusted according to the thickness of the patient's arm, which is convenient for popularization.

3. A display screen is also provided in the utility model, and the display screen is used for real-time display of the collected blood flow of internal fistula, which is convenient for users and doctors to observe the variation in real time. At the same time, a sound and light alarm module is also set up. Once the blood flow is abnormal, it will automatically remind, which is more convenient and efficient to use.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of this embodiment.

Fig. 2 is a schematic view of the front structure of the display screen in this embodiment.

Among them: 1—ultrasonic probe, 2—controller, 3—display screen, 4—alarm light, 5—sound outlet, 6—wristband.

Detailed ways

The utility model will be further described in detail below in conjunction with the embodiments and accompanying drawings, but the implementation of the utility model is not limited thereto.

Example 1

As shown in Figure 1, the wearable arteriovenous fistula blood flow monitor in this embodiment includes a wristband 6 and a monitoring device. When in use, the wristband is worn on the user's arm for real-time measurement of the arteriovenous fistula. Fistula blood flow.

In this embodiment, a frame outside the monitoring device is fixed on a wristband, which is similar to an ordinary watch. The structure of the monitoring device is shown in Figures 1 and 2, and specifically includes an ultrasonic probe 1, a controller 2, and a display screen 3. The ultrasonic probe and the controller are all arranged in the frame, and the ultrasonic probe is arranged on the inner side of the wristband, so that it is close to the inner side during use. The skin above the fistula blood vessel, the output end of the ultrasonic probe is connected with the input end of the controller. The display screen is arranged outside the frame body, the output end of the controller is connected with the input end of the display screen, and the controller displays the blood flow of internal fistula detected by the ultrasonic probe on the display screen in real time.

In this embodiment, the monitoring device also includes an acousto-optic alarm module. The acousto-optic alarm module is specifically an alarm lamp 4 and a buzzer. The structures of the two are shown in FIG. In the frame of the monitoring device, its sound outlet 5 is arranged on the upper end of the display screen. Both the alarm light and the buzzer are connected with the controller. According to the prior art, two thresholds may be preset in the controller, namely a low threshold and a high threshold. The ultrasonic signal of the ultrasonic probe is collected in real time or regularly, and the built-in chip of the controller converts the ultrasonic signal into a numerical signal. Once the current numerical signal value is lower than the low threshold, it means that the current blood flow is blocked, and the control signal is sent to the alarm light and Buzzer external alarm. Similarly, once the current numerical signal value is higher than the high threshold, it means that the current abnormal blood flow is accelerating, and control signals are sent to the alarm lamp and the buzzer to give an external alarm. For timely intervention and further medical examination.

The wristband in this embodiment is made of anti-sensitive silicone material, and there is a buckle and several lockholes on the wristband. If the buckle is locked in different lockholes, the diameter of the wristband will be different, so it can be applied It can be used to measure different patients, or to measure different parts of the same patient. When measuring different parts of the same patient, combined with the acousto-optic alarm module, the position can be changed multiple times on the path of the internal fistula vessel. In case of blood flow blockage or abnormal blood flow acceleration, it can be roughly located.

The above-mentioned embodiment is a preferred implementation mode of the present utility model, but the implementation mode of the present utility model is not limited by the above-mentioned embodiment, and any other changes, modifications and substitutions made without departing from the spirit and principle of the present utility model , combination, and simplification, all should be equivalent replacement methods, and are all included in the protection scope of the present utility model.

Claims (5)

1. The wearable arteriovenous fistula blood flow monitor is characterized in that it comprises a wrist strap and a monitoring device, and the monitoring device is fixed on the wrist strap; the monitoring device includes an ultrasonic probe, a controller, a display screen, an acousto-optic Alarm module, the ultrasonic probe is arranged on the inner side of the wristband, close to the skin above the internal fistula blood vessel when in use, the output end of the ultrasonic probe is connected with the input end of the controller; the output end of the controller is respectively connected with the display screen, the sound and light alarm module connected; the display screen is used to display the collected blood flow of internal fistula in real time. 2. The wearable arteriovenous fistula blood flow monitor according to claim 1, wherein the wristband is made of anti-sensitivity silicone material, and its diameter is adjustable. 3. The wearable arteriovenous fistula blood flow monitor according to claim 2, characterized in that the wristband has a lock and several lock holes, and the lock is fixed in one of the lock holes during monitoring Inside. 4. The wearable arteriovenous fistula blood flow monitor according to claim 1, wherein the sound and light alarm module includes an alarm light and a buzzer, and the sound outlets of the alarm light and the buzzer are all set at Around the display screen, the warning light and the buzzer are respectively connected with the controller. 5 . The wearable arteriovenous fistula blood flow monitor according to claim 1 , wherein the ultrasonic probe adopts an ultrasonic sensor with a diameter of less than 20 mm and a model of UMT30.