If you’re recovering from a respiratory problem — including COVID-19 — chances are you may have had your oxygen levels checked with a pulse oximeter.
Pulse oximetry is the non-invasive measurement of oxygen saturation (SpO2). Oxygen saturation is defined as the amount of oxygen dissolved in the blood, based on the detection of Hemoglobin, Hb, and Deoxyhemoglobin, HbO2.
The typical pulse oximeter is a device that clamps on one of your fingers. Home-use oximeters are often battery-powered and self-contained with the oxygen level displayed on a built-in LCD along with heart rate.