Pressure transducer based on the phase characteristics of GMI effect for measuring the arterial pulse wave

Abstract

This paper presents a new technique for the measurement of arterial pulse waves, based on the development of a high-sensitivity pressure transducer. While previous investigations employed sensors based on the behavior of the magnitude of the impedance of Giant Magnetoimpedance (GMI) ribbon-shaped samples, this work highlights the importance of using the phase impedance characteristics of the GMI effect in order to increase the sensitivity. The new transduction system of pressure into voltage, for biomedical applications, is described, and the results of the pulse wave measurements from the carotid and radial arteries are presented.