Multimodal Cardiovascular Information Monitor Using Piezoelectric Transducers for Wearable Healthcare

Abstract

This article describes a multimodal cardiovascular information measurement method using a wearable device composed of piezoelectric transducers. Cardiovascular diseases are increasing with the aging population, and they constitute a significant portion of the causes of death and long-term care. In recent years, daily-life monitoring using wearable sensor devices has attracted particular attention for the prevention and early detection of cardiovascular diseases. However, recent wearable devices can only measure limited cardiovascular information such as the heart rate. In contrast, the proposed method can simultaneously measure heart rate variability, pulse wave propagation velocity, and blood flow velocity using only a piezoelectric transducer array.

Wearable Multi-Functional Sensing Technology for Healthcare Smart Detection

“…Finally, one can achieve a portable wearable device by using a simple glass structure, as shown in Figure 5a. Okano et al proposed a method that can measure blood flow velocity and pulse simultaneously [70]. The multiple piezoelectric transducers can detect a pulse on multiple positions on the wrist, and simultaneously send ultrasound waves toward the body surface.…”

“…Reproduced with permission from MDPI (2016)[69] The structure of the multiple piezoelectric transducers that can measure blood flow velocity a pulse simultaneously. Reproduced with permission from Springer Nature (2018)[70]. (c) The structure of the piezoelectric sensor based on ZnO nanowire (NW) film that is able to sense te perature.…”

Human body IoT systems based on the triboelectrification effect: energy harvesting, sensing, interfacing and communication

“…These flexible and light devices can assist humans to adjust their physical status better by monitoring the basic physiological signals from daily activities. [184][185][186] Yet, it still remains a great challenge to accurately monitor with a fast response. It is suggested that future research focus can be on the high sensitivity and accuracy of TENG-based wearable/implantable sensors for sensing physiological signals in real time.…”

Self‐Powered Wearable Micropyramid Piezoelectric Film Sensor for Real‐Time Monitoring of Blood Pressure

“…[1][2][3][4][5][6][7] Such real-time biosignal monitoring can diagnose various diseases in advance and detect sudden health failures. [8][9][10][11] Among many biosignals, blood pressure is a standard indicator for diagnosing any irregularity in cardiovascular functions such as hypertension, arrhythmia, and cardiac failures. [12][13][14] Although the blood pressure can be measured precisely with a catheter, it can be used only in a very limited situation due to its invasiveness.…”