Ключевые слова: adult, background, blood, cardiac, care, check, checking, closeup, device, electronic, equipment, finger, fingertip, hand, health, heartbeat, hemoglobin, level, male, man, mask, measure, measurement, measuring, medical, medicine, meter, modern, monitor, monitoring, oximeter, oximetry, oxygen, pandemic, person, pills, pressure, pulse, rate, saturation, screen, table, technology, using, vital, white,