Ключевые слова: background, blood, cardiac, cardiology, care, clinic, closeup, device, display, electronic, equipment, finger, fingertip, hand, health, health care, heartbeat, hemoglobin, hospital, instrument, level, machine, measure, measurement, medical, medicine, modern, monitor, monitoring, normal, oximeter, oximetry, oxygen, oxygen level, oxymeter, patient, pneumonia, portable, pulse, pulse oximeter, rate, saturation, sensor, technology, tests, tool, treatment, vital,