A blood gas test is performed to provide a precise measurement of oxygen and carbon dioxide levels in the body, helping to detect diseases. A physician may order a blood gas test to assess how well the lungs and kidneys are functioning. This test is frequently used to guide treatment, particularly in acute illnesses. A blood gas test may be administered to individuals exhibiting symptoms of oxygen, carbon dioxide, or pH imbalance. Such symptoms may include shortness of breath, confusion, and nausea. Furthermore, a physician may order a blood gas test if they suspect lung disease, kidney disease, or a metabolic disorder.