Arterial Blood Gas (ABG) Test ​Product Description: The Arterial Blood Gas (ABG) Test is a specialized blood test that measures the levels of oxygen and carbon dioxide in your blood. It also determines the acidity (pH) of your blood. Unlike most blood tests that use samples from a vein, the ABG test requires blood taken from an artery, which carries oxygenated blood. This test is crucial for evaluating how well your lungs are moving oxygen into the blood and removing carbon dioxide from it.