Multimodal cardiovascular information monitor using piezoelectric transducers for wearable healthcare

This report describes a multimodal cardiovascular information measurement method using a wearable sensor device. With the progress of aging populations worldwide, cardiovascular diseases are increasing. Such diseases account for a large share of causes of death and constitute the main cause of long-term care. Along with the miniaturization and longer life of measuring instruments in recent years, constant monitoring of biological information using a wearable biosensor has attracted attention for the prevention and early detection of cardiovascular diseases. However, today's wearable devices can only measure limited cardiovascular information such as the heart rate. Therefore, we propose a method that can simultaneously measure heart rate variation, pulse wave propagation velocity, and blood flow velocity with a single device equipped with a piezoelectric transducer array.