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.

It’s normal for infants born at higher altitudes to have lower oxygen levels in their bloodstreams than do newborns born at sea level, or even in Denver, according to the results of a research study ...

Supplemental oxygen therapy in patients with suspected or confirmed myocardial infarction and normal blood oxygen saturation levels is not associated with any clinical benefit, a new meta-analysis ...