CO₂ levels are measured using different methods, including:
1. Arterial Blood Gas (ABG): This test measures the partial pressure of carbon dioxide (PaCO₂) in arterial blood, providing a direct assessment of the lungs' ability to expel CO₂. 2. Capnography: This non-invasive method measures the amount of CO₂ in exhaled air, providing continuous monitoring of a patient’s ventilatory status. 3. End-Tidal CO₂ (ETCO₂): This is the maximum concentration of CO₂ at the end of an exhaled breath and is often used during anesthesia and in critical care settings.
