Invasive pressure measuring of arterial blood pressure and central venous pressure is a standard procedure in critical neuro surgery or heart surgery. Altitude of the blood pressure sensor is the same as the reference point, which might be the right auricle with patient in supine position. Permanent changes in position of the patient during minimally invasive procedures or changes of height during radiologic interventions require permanent manual adjustment due to incorrect display of blood pressure.
As part of LUMEN II methods for adjusting the invasive blood pressure measurement with multi-sensor systems. We aim to develop methods to determine the position of the human body and the reference sensor within a Body-Area-Network (BAN). The measurement of heart sounds enables the localization of the heart by time-of-flight measurements. Furthermore, heart sounds offer information for diagnostic procedures.
The foundation for this process is a synchronized detection and recording of heart sounds in a body-area-network. Time of flight measurements provide the position of the heart which can be utilized in the compensation of the heart reference point.