A Feasibility Study on Bioimpedance-based Plethysmogram Detection Focusing on Measurement Frequency and Electrodes Size

Daily measurement of pulsation can be useful for managing various health conditions. In this paper, we aim to develop a technique that uses bioelectromagnetic responses for pulsation measurement using wearable devices. Different types of electrodes were used to measure the pulsation of a subject at different frequencies: 1, 3, and 5 MHz. The results show that pulsation can be measured as changes in bioimpedance under all the selected conditions. Moreover, measured frequency in the range of 1-5 MHz has little influence on the waveforms of bioimpedance, whereas electrode size has some influence on the waveforms.