![]() People who check their own oxygen levels, or those who check it for them, should keep this in mind when looking at results. Their oxygen levels are sometimes reported as higher than they really are. Pulse oximetry results may not be as accurate for people with darker skin. Some people may feel very sick and have good oxygen levels, and some may feel OK, but have poor oxygen levels. Oxygen level measured by a pulse oximeter is not the only way to know how sick someone is. However, while a pulse oximeter may help someone feel like they have some control over their health, it does not tell the whole story. If someone has COVID-19, a pulse oximeter may help them keep watch over their health and to know if they need medical care. Get tested if you have signs of COVID-19 or if you have been close to someone who has it. We do not recommend using a pulse oximeter as a way to tell if someone has COVID-19. Can a pulse oximeter tell if someone has COVID-19 or how well they are doing if they have it? People can buy pulse oximeters without a prescription at some pharmacies and stores. People who have a lung or heart condition may use a pulse oximeter at home to check how they are doing, as directed by their health care provider. Many people consider oxygen level an important sign of how well a body is working, just like a person’s blood pressure or body temperature. They are used often in hospitals and clinics and can be bought to use at home. It is a small device that clips onto a finger, or another part of the body. ![]() ![]() What is a pulse oximeter?Ī pulse oximeter measures how much oxygen is in someone’s blood. ![]() Low oxygen levels can be an early warning sign that medical care is needed. Many people with COVID-19 have low levels of oxygen in their blood, even when they feel well. Oxygen Levels, Pulse Oximeters, and COVID-19 How does COVID-19 lower a person’s oxygen levels? ![]()
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