Blood gas analysis (AGD) or arterial blood gas (ABG) tests are blood tests taken through arteries to measure the levels of oxygen, carbon dioxide, and the level of acid base (pH) in the blood. Blood gas analysis is generally done to check the function of the pulmonary organs into which red blood cells carry oxygen and carbon dioxide from and throughout the body. In addition, this test can be done to check the condition of the heart and kidney organs, as well as symptoms caused by disturbances in the distribution of oxygen and carbon dioxide, or pH balance in the blood, such as nausea, shortness of breath, and decreased consciousness. This test is also done on patients who are using breathing aids to monitor their effectiveness. Indications and Contraindications for Blood Gas Analysis Blood gas analysis is carried out to measure levels of acid base (pH) to find out if the blood is too acidic (acidosis) or alkaline (alkalosis), and to find out whether the oxygen pressure in the bl