Ключевые слова: cardiology, care, check, closeup, coronavirus, covid, covid19, device, digital, display, electronic, electronics, equipment, female, finger, fingertip, gadget, hand, health, heart, heartbeat, hospital, level, measure, measurement, medical, medical equipment, medicine, meter, modern, monitor, monitoring, oximeter, oximetry, oxygen, pandemic, person, portable, pulse, sao, saturation, sensor, spo, technology, test, using,