Wearable internal arteriovenous fistula blood flow monitoring device and system thereof

Abstract

The present invention discloses a wearable internal arteriovenous fistula blood flow monitoring device and a system thereof. The wearable internal arteriovenous fistula blood flow monitoring device ischaracterized by comprising a main body outer shell, a fixing bandage, a contact cushion layer, a display screen, control keys, a buzzer alarm, an ultrasonic signal source, an ultrasonic transmitter,an ultrasonic receiver, a pulse signal receiver, a microprocessor chip, a digital-to-analog converter, a patch piezoelectric film sensor, a noise reducer, an amplifier and a band-pass filter. The device realizes monitor of velocity of blood flow after a surgery of an internal arteriovenous fistula part when carried about, monitors the velocity of the blood flow in real time, can master the bloodflow condition of the internal arteriovenous fistula in real time, and when the internal arteriovenous fistula has a thrombus blockage risk, can find the thrombus blockage risk and take clear measuresat the first time; and turbulence at the internal arteriovenous fistula part is accurately collected to form a waveform and whether the internal arteriovenous fistula is unblocked or not is judged through the waveform.

Description

technical field [0001] The invention belongs to the field of wearable blood flow monitoring, in particular to a wearable arteriovenous fistula blood flow monitoring device and system. Background technique [0002] Arteriovenous fistula is one of the surgical operations, mainly used for hemodialysis treatment; arteriovenous fistula is a small operation of vascular anastomosis, which sutures the artery near the wrist and the adjacent vein to make the anastomotic vein Arterial blood flows in the blood, forming an arteriovenous fistula; the blood vessels of the arteriovenous fistula can provide sufficient blood for hemodialysis treatment, and provide guarantee for the adequacy of dialysis treatment; [0003] Some patients are prone to occlusion within 7 days after the arteriovenous fistula operation due to too thin blood vessels or thrombosis, which makes the arteriovenous fistula blocked and unable to realize its function; therefore, it is necessary to monitor the blood flow ve...

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Problems solved by technology

[0003] Some patients are prone to occlusion within 7 days after the arteriovenous fistula operation due to too thin blood vessels or thrombosis, which makes the arteriovenous fistula blocked and unable to realize its function; therefore, it is necessary to monitor the blood flow velocity of the arteriovenous fistula Monitoring, if the blood flow is too slow, it means that there is a risk of blockage at the arteriovenous fistula, and measures need to be taken to eliminate the thrombus to make it unblocked; normal arterial blood flow is fast, and vein blood flow is slow, while arteriovenous fistula blood flow The arterial blood rushes directly into the vein to form turbulent flow. Through this impact turbulent flow, it can be further confirmed whether the blood flow at the arteriovenous fistula is unimpeded; however, the current monitoring of blood flow velocity can only be done by appointment in the hospital using Doppler color Doppler ultrasound. In addition, the turbulent flow at the arteriovenous fistula can only be judged simply by listening to the vibration sound or touching the vibration, which has a particularly large error; these conditions can not realize the postoperative arteriovenous fistula real-time monitoring

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