Arterial blood gas helps assess the patient's acid-base balance, ventilation status, and blood oxygenation status. This is a very important test, especially for critically ill patients.

An arterial blood gas test is a test that measures the levels of oxygen and carbon dioxide in the blood, helping to diagnose and assess the severity of chronic obstructive pulmonary disease (COPD).

Arterial blood gas analysis includes measurements of the pH, partial pressures of oxygen, and carbon dioxide in arterial blood. The test results are used to assess the acid-base balance of the blood and the ability of the lungs to exchange gases.