Skip to Content
Home > Wellness > Health Library > Pulse Oximeter
A pulse oximeter is a device that checks how much oxygen is in the blood.
clip is put on a finger, toe, or earlobe. The light beam in the clip measures
the oxygen of the red blood cells that move through the cells in the finger,
toe, or earlobe. The person's oxygen level can be read on the display.
The pulse oximeter often has an alarm for blood oxygen levels that
fall below a safe level.
Current as of:
August 21, 2015
Adam Husney, MD - Family Medicine & John M. Freedman, MD - Anesthesiology
To learn more about Healthwise, 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.