Most healthy people’s reading of oxygen in the blood is 100%.
The oxygen level may also help to determine if you need to receive supplemental oxygen.
Doctor who survived COVID-19 recommends having a pulse-oximeter on hand:
“At about day seven, I started having very rapid heartbeat,” Dr. Paul Frank told ‘Good Day New York.‘ “I had a pulse-oximeter at home. It was going into dangerous levels. I knew I needed emergency care.”
Dr. Frank said he developed difficulty breathing and quickly gave himself oxygen.
If you have a symptom of shortness of breath or a known lung or heart condition, your doctor may use a pulse oximeter.