Skip to Content
Home > Wellness > Health Library > Oxygen Saturation
Oxygen saturation refers to the amount of oxygen being carried in
the red blood cells, which load up with oxygen in the lungs and then transport
it to the rest of the body. People who have medical conditions, such as lung
disease, may not have enough oxygen in their red blood cells.
Oxygen saturation can be measured by a device called an oximeter.
Oxygen saturation of less than 90% is a sign that the lungs and heart are not
Current as of:
September 9, 2014
Anne C. Poinier, MD - Internal Medicine & Mark A. Rasmus, MD - Pulmonology, Critical Care Medicine, Sleep Medicine
How this information was developed to help you make better health decisions.
To learn more, visit Healthwise.org
© 1995-2015 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.
You'll find Decision Points to help you answer questions about:
Get started learning more about your health!
Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups, and pregnancy.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.