2021 Volume Annual59 Issue Abstract Pages 312
Early detection of COVID-19-derived and other pneumonia is crucial to avoid disease spreading. Hence, we developed real-time pneumonia monitoring system and applied in clinical setting. System measures respiratory rates (RR) and heart rates (HR) and HF of heart rate variability which stands for parasympathetic nervous activity using microwave radars located beneath bed mattress. Nurse monitor displays, RR, HR, cardiopulmonary arrest, suspect of pneumonia, and suspect of arterial fibrillation responsible for brain infarction in real-time. In order to compensate drastic individual differences of vital signs in elderly patients, we adopted Mahalanobis's squared distance, a non-Euclidian distance determined by RR, HR and HF of the past 10 hours divided into anterior (before pneumonia pathogenesis) and posterior 5-hour periods (after pneumonia pathogenesis). Two out of 20 inpatients (8 males and 12 females, 74 +/- 14 years at Genki-kai Yokohama Hospital) developed pneumonia during 5-days validation, with sensitivity of 100% and NPV of 100%.
