![]() A pulse oximeter can quickly detect this drop in oxygen saturation, alerting people of the need for medical intervention. When the capacity of the lungs to transport oxygen into the blood is impaired, blood oxygen saturation declines, potentially putting our organs in danger. Our organs need a constant supply of oxygen to work properly. In turn, these capillaries send oxygen-rich blood to the heart, which then pumps it through arteries to the rest of the body. When we breathe in air, our lungs transmit oxygen into tiny blood vessels called capillaries. Oxygen saturation is a crucial measure of how well the lungs are working. But what, exactly, is it?īasically, pulse oximetry is a painless, noninvasive method of measuring the saturation of oxygen in a person’s blood. ![]() Pulse oximetry is a term that frequently appears online and in news reports in connection with COVID-19. ![]()
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