- Mar 04, 2010
My mom has been on oxygen for 1 1/2 years. Her blood gas level test was 52% and went throug...

Blood gases is a test done to measure how much oxygen and carbon dioxide is in your blood. It also looks at the acidity (pH) of the blood. Usually, blood gases look at blood from an artery. In rarer cases, blood from a vein may be used.
Arterial blood gas analysis; ABG