Wearable bioimpedance monitoring system using conformal nanowire electrodes

Abstract

Various examples are related to bioimpedance measurements. In one example, a wearable monitoring system includes electrodes and processing circuitry configured for bioimpedance sensing. The electrodes can include a current source electrode, a current sink electrode, and voltage measurement electrodes aligned between the current source and sink electrodes. The processing circuitry can sense bioimpedance based upon excitation current applied through the current source and sink electrodes and measured voltage obtained through the voltage measurement electrodes across a range of excitation frequencies. The electrodes can be conformal and stretchable. In another example, a method for bioimpedance sensing includes positioning a wearable monitoring system on a surface, applying excitation current through the current source and sink electrodes over a range of excitation frequencies; measuring voltage across the voltage measurement electrodes over the excitation frequencies; and determining the bioimpedance using the applied excitation current and the measured voltage over the excitation frequencies.