Learn about the pulse oximetry test, which measures your blood oxygen levels. Know the importance, how it’s performed, and what the results mean for your health.

Pulse oximetry can estimate the levels of oxygen in your blood. Find out how a pulse oximetry test works, what it's used for, and what the readings mean.

Blood oxygen levels refer to the amount of oxygen circulating in the blood. Normal blood oxygen levels fall between 75 and 100 millimeters of mercury (mm Hg) on arterial blood gas (ABG) test results.

An arterial blood gas (ABG) test measures oxygen and carbon dioxide levels in your blood. It also measures your body’s acid-base (pH) level, which is usually in balance when you’re healthy.

To test the blood oxygen level, the Oura Ring Gen3 and Gen4 feature LED sensors that emit red and infrared light into the finger on which you're wearing the ring and then monitor the reflected ...

To test the blood oxygen level, the Oura Ring Gen3 and Gen4 feature LED sensors that emit red and infrared light into the finger on which you're wearing the ring and then monitor the reflected ...