Ключевые слова: blood, cardiac, cardiology, care, check, clinic, clinical, control, coronavirus, covid19, device, digital, doctor, electronic, emergency, finger, fingertip, hand, health, heart, heartbeat, hemoglobin, hospital, human, level, mask, measurement, medic, medical, medical mask, medicine, modern, monitoring, oximeter, oximetry, oxygen, patient, pneumonia, portable, pressure, pulse, pulse oximeter, saturation, screen, sensor, sick, speed, technology, test, woman,