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.

Sleep apnea can cause low blood oxygen during sleep. Low oxygen levels from sleep apnea can lead to health issues like fatigue and shortness of breath. If blood oxygen levels drop below 92%, medical ...

A new sensor could soon allow hospital patients' blood oxygen levels to be checked via their breath. The technology is claimed to be more reliable and less painful than existing traditional methods.

Monitoring your blood oxygen levels may not seem as exciting as step counting or be as obvious in its benefits as something like sleep tracking, but it's still a useful option for managing your health ...

Taking a flight may be routine for some, but not much attention is paid to the physiological changes that take a toll on your ...

Fact checked by Jennifer Klump About the Author Kelly Wood, MD, is a board-certified endocrinologist specializing in osteoporosis and metabolic bone disease. She also treats adults with diabetes, ...

Apple is bringing blood oxygen monitoring back to some Apple Watch models after a US Customs ruling. It began pulling the feature in 2024, following a patent dispute with medtech company Masimo. An OS ...