Tetrapolar low-cost systems for thoracic impedance plethysmography
Bioelectrical impedance analysis applied to pneumographic investigation is a technique for monitoring the respiratory activity through the measurement of variations in the trans-thoracic electrical impedance. In this paper, a low-cost reconfigurable measurement system is presented. The system is based on a 4-electrode volt-amperometric technique and a network of inertial sensors for correction of arms motion artifacts. The trans-thoracic impedance was acquired via an ad-hoc programmed LabVIEW software.