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.

Normal blood oxygen level is either 95%-100% SpO2 on an oximeter or 80-100 mm Hg from an ABG test. ABG tests are more accurate than pulse oximeters, which have a ...

Lindsay Modglin is a nurse and professional writer who regularly writes about complex medical topics, as well as travel and the great outdoors. She holds a professional certificate in scientific ...

Doctors say one of the best ways to monitor patients with COVID-19 is by tracking their blood oxygen levels, which can show when they have dangerous breathing problems — even if they don’t feel short ...

The blood in your body delivers oxygen to all of your cells. When you breathe and draw fresh oxygen into your lungs, red blood cells bind with the oxygen and carry it through your bloodstream. On a ...

If someone’s blood oxygen level falls below 60 mm Hg, there may not be enough oxygen reaching the body’s vital organs. This can lead to symptoms such as shortness of breath and dizziness. This article ...