An arterial blood gas (ABG) test is conducted to provide precise measurements of oxygen and carbon dioxide levels, as well as the pH balance in the body. This diagnostic tool is crucial for assessing various medical conditions. A physician may order an ABG test to evaluate the efficiency of lung and kidney function. It is commonly employed to guide the treatment strategies for acute illnesses. The test is indicated for individuals presenting symptoms like shortness of breath, confusion, or nausea, which could signal an imbalance in oxygen, carbon dioxide, or pH. Moreover, an ABG test is often requested when lung disease, kidney disease, or metabolic disorders are suspected.