Abstract

COVID infection meant a significant load of work and stress for respiratory nurses and doctors. One of the recommended approaches for handling COVID patients was to minimize contact with the patient to the lowest possible level and utilize telemedicine gadgets and tools for patient follow-up. The study aimed to assess the reliability of a newly developed removable pad with ballistocardiographic sensors (BCS) which were installed under the mattress of the patient. The sensor can measure heart rate, patient breathing pattern and movement within the bed. The study aimed to compare the heart rate measured by BCS and by clinical measurement done by the respiratory nurse (RNM) at the same time during the consecutive day of hospital stay. Study included 20 patients, who underwent 1920 hours of ballisticardiographic measurement, data on vital functions from morning visits were compared to heart rate (HR) estimated by ballistocardiograhic censors in a pad mounted to patients' beds. Results showed good concordance between BCS (HR 82.2 ± 17.0) vs RNM 78.7 (± 15.6), the hypothesis of difference between BCS and RNM was rejected (p=0.07), there was a positive correlation between BCS and RNM (r=0.44, p<0.0001). The main advantage of ballistocardiograhic principle of heart rate measurement is its nonintrusive principle in comparison to disturbance of patients by RNM measurements. This method could significantly simplify vital function measurement in future epidemics of infectious diseases.