If we want to measure the amount of carbon-di-oxide and oxygen in the blood of our body then, we have to go through the test to which we call a blood gas test. Commonly, this test is called as arterial blood gas (ABG) or blood gas analysis. This test is useful for predicting the acidic nature of blood or its pH. If we want to predict the blood’s fine oxygen-movement and elimination of carbon-di-oxide from the blood then, we are in need of blood gas analysis.