Ключевые слова: adult, background, blood, cardiac, care, check, clinic, closeup, coronavirus, covid19, device, digital, disease, display, electronic, electronics, equipment, finger, fingertip, hand, health, heart, heartbeat, hemoglobin, hospital, instrument, level, machine, measure, measurement, medical, medicine, meter, modern, monitor, monitoring, oximeter, oximetry, oxygen, patient, portable, pressure, pulse, rate, saturation, sensor, technology, tool, using, vital,