Ключевые слова: blood, cardiac, cardio, cardiology, care, control, covid 19, covid19, disease, display, female, finger, hand, health, health care, healthcare, heart, holding, hospital, instrument, level, measure, measurement, medical, medicine, monitoring, nubes, old, oximeter, oximetry, oxygen, oxygen saturation, oxygenation, patient, people, person, pneumonia, pulse, pulse oximeter, pulse oximetry, pulse oxymeter, rate, sarscov2, selfisolation, senior, spo2, treatment, woman,