Research of a pulse wave sphygmographic transducer

Abstract

The article discusses the structure of a pulse wave measuring transducer based on compression sphygmography. Practical examinations of an experimental model of the proposed measuring transducer have been carried out, involving 45 volunteers. The optimal value of the pressure injected  in the compression cuff in the range of 80 – 120 mmHg and the dynamic range of pulse wave amplitude  of 20 dB have been specified. Mathematical models of pulse wave signals and respiratory interference are used to determine the optimal parameters of the high-pass digital filter and the cut-off frequency of the high-pass analog filter. In the course of metrological research of the developed transducer the instrumental error in measuring amplitude-time characteristics of the pulse wave has been specified. It does not exceed 1.5% for the measurement of interpulse intervals’ duration and 2.3% for the measurement of the amplitude.

About the authors

A. A. Fedotov

Samara State Aerospace University

Author for correspondence.
Email: fedoaleks@yandex.ru

Candidate of Science (Engineering)
Assistant Professor of the Department of Laser Systems and Biomedical Engineering

Russian Federation

A. S. Akulova

Samara State Aerospace University

Email: akulova_as@mail.ru

Postgraduate student

Russian Federation

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