ABG
Also written as: ABG — arterial blood gas
Laboratory test measuring oxygen, carbon dioxide, and pH levels in arterial blood.
Full Definition
Arterial blood gas (ABG) analysis is a diagnostic test that measures the levels of oxygen (PaO2), carbon dioxide (PaCO2), pH, bicarbonate (HCO3-), and base excess in arterial blood. This test is crucial for assessing respiratory function, acid-base balance, and metabolic status. ABG results guide respiratory therapy interventions, mechanical ventilation settings, and treatment of respiratory failure. The test requires arterial puncture, typically from the radial, brachial, or femoral artery, and provides immediate information about gas exchange efficiency and acid-base homeostasis.
Usage
Usage note: Always capitalized as an acronym; spell out on first use in formal documents.
In Context
- "The ABG results showed severe hypoxemia with a PaO2 of 55 mmHg." — Laboratory report
- "Draw an ABG in 30 minutes to assess the patient's response to ventilator changes." — Clinical order