which diagnostic test measures the oxygen saturation level in the blood
How to Measure Blood Oxygen. Two Methods:Measuring Blood Oxygen by an Arterial Blood Gas TestMeasuring Blood Oxygen by Pulse OximetryCommunity Q&A. Pulse oximetry and arterial blood gas tests are methods to measure how much oxygen is in your blood. Normal oxygen saturation levels range from 97% to 99% in healthy people. When your blood oxygen is too low, it's called hypoxemia.
What is pulse oximetry? Pulse oximetry is a test used to measure the oxygen level (oxygen saturation) of the blood. It is an easy, painless measure of how well oxygen is being sent to parts of your body furthest from your heart, such as the arms and legs. A clip-like device called a probe is placed on a body part, such as a finger or ear lobe. The probe uses light to measure how much oxygen is in the blood. This information helps the health care provider decide if a person needs extra oxygen.