Low-voltage, low-power pressure sensors for monitoring health Wearable and implantable sensors that are designed to monitor various indicators of patient health have to be able to respond to very small changes in bodily pressure. They need to be able to monitor physical functions such as pulse rate, blood pressure and even subtle changes in vocal cord vibrations in real time with a high degree of sensitivity. These responses are generated when a substance in the sensor "gates," or allows selected pressure signals to pass to a transistor, which then conducts and amplifies these signals for detection. Recently, organic electrochemical transistors (OECTs) have been found to exhibit much improved signal amplification capabilities at lower voltages and power consumption. However, to date, there has been little exploration of OECTs for use in pressure sensors because they are usually paired with liquid gating substances, which do not respond well to external pressure.