Arterial Blood Gas (ABG) Test
Accurate Assessment of Oxygen, Carbon Dioxide & Acid-Base Balance
What is an Arterial Blood Gas (ABG) Test?
The Arterial Blood Gas (ABG) test is a specialized diagnostic test that measures oxygen levels (PaO2), carbon dioxide levels (PaCO2), blood pH, and bicarbonate levels in arterial blood.
It provides critical information about lung function, gas exchange efficiency, and the body's acid-base balance. The ABG test is commonly used in emergency, critical care, and chronic respiratory disease management.
Why is the ABG Test Performed?
Who Should Consider an ABG Test?
Patients with severe respiratory distress, chronic lung diseases like COPD or interstitial lung disease, suspected respiratory failure, uncontrolled asthma, sepsis, or critical illness may require an ABG test. It is also essential for patients receiving oxygen therapy or mechanical ventilation.
How is the ABG Test Performed?
A small sample of blood is drawn from an artery, usually from the wrist (radial artery). Unlike regular blood tests taken from veins, arterial sampling provides accurate measurement of oxygen and carbon dioxide levels.
The procedure takes only a few minutes. Some mild discomfort may be felt during needle insertion, but the test is quick and safe when performed by trained professionals.