Measuring method of finger tip blood flow rate and measuring instrument thereof

Abstract

The invention discloses a measuring method of finger tip blood flow rate based on an accelerated pulse wave and a measuring instrument thereof. The instrument comprises a volume pulse wave acquisition module, a signal conditioning module, an operation processing module, an external mass memory module, a USB (Universal Serial Bus) communication module, a waveform and result display module. The measuring method comprises the following steps: during measuring, detecting a human finger tip pulse beating signal a volume pulse wave sensor, after passing through the signal conditioning module, converting the human finger tip pulse beating signal into a digital signal by using operation processing module, storing the digital signal in the external mass memory module, carrying out twice differential processing and filtering processing on a volume pulse wave so as to obtain a smoothing quadratic differential waveform, namely an accelerated pulse wave required by a system; extracting out pulse wave propagation time from the accelerated pulse wave, and establishing a functional relation between the propagation time and human blood pressure so as to determine blood flow rate. The measuring method of the finger tip blood flow rate based on the accelerated pulse wave and the measuring instrument thereof realize non-invasive, convenient and fast, accurate and reliable measurement on the finger tip blood flow rate; the measuring instrument requires few input signals; and the relation between a input signal and a measuring result is stable.

Description

Technical field [0001] The invention belongs to the field of medical equipment, and particularly relates to a measuring method and a measuring instrument for calculating blood flow velocity by using accelerated pulse wave extraction parameters. Background technique [0002] Many studies have shown that blood flow parameters can well reflect the physiological conditions of the human body and play a very active role in the prevention and treatment of many diseases, and blood flow speed is an extremely important one of the blood flow parameters. [0003] The current blood flow velocity detection methods are usually ultrasound Doppler and laser Doppler methods, that is, using ultrasound or laser methods to present blood images in tissues on a screen, and reflect the blood flow velocity by measuring changes in the blood images on the screen. Most hospitals are now equipped with Doppler imaging blood flow velocity detectors for diagnosis and scientific research. After decades of improvem...

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Problems solved by technology

[0004] However, due to the large volume of the Doppler method blood flow velocity detector, it is inconvenient to operate and requires a high level of knowledge of the operator. The test site is relatively fixed, such as fingers, like homes, scientific resear

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