ABSTRACT
Background: The purpose was to determine the frequency and duration of vital sign deviations in acutely admitted patients in general wards with confirmed COVID-19 infection using continuous wireless vital sign monitoring. Material(s) and Method(s): Patients were equipped with two wireless sensors live-transmitting respiratory rate (RR), heart rate (HR) and peripheral oxygen saturation (SpO2). Frequency and duration of vital sign deviations were compared with manual point measurements performed by clinical staff according to the national Early Warning Score (EWS), assuming linear relationship between EWS point measurements. Result(s): Continuous monitoring detected episodes of SpO2 < 92% for more than 60 consecutive min in 92% of patients versus 42% of patients detected by EWS (p < 0.0001). Events of desaturation with SpO2 < 88% for more than 10 min was registered in 87% with continuous monitoring versus 27% with EWS (p < 0.0001). Desaturation with SpO2 < 80% for more than 1 min was detected in 76% with continuous monitoring versus 6% with EWS (p < 0.0001). 70% of patients had episodes of tachypnea with RR >24 breaths per minute >5 min detected with continuous monitoring versus 36% assessed by EWS (p = 0.0001). Episodes of HR >111 for >60 min was recorded in 51% versus 24% (p = 0.0002). Conclusion(s): Moderate and severe episodes of desaturation, tachypnea, and tachycardia during hospital admission in patients with COVID-19 infection are common and most often not detected by routine manual measurements.