What does "ETCO2" measure?

ETCO2, or End-Tidal Carbon Dioxide, measures the amount of carbon dioxide present in exhaled air. This measurement is significant in a clinical setting as it provides critical information about a patient's ventilatory status and metabolic function. Specifically, it helps in assessing how effectively carbon dioxide is being eliminated from the body, which can be indicative of a patient’s respiratory function and overall carbon dioxide production.

The measurement of ETCO2 allows healthcare professionals to monitor ventilation during procedures, guide the management of patients in respiratory distress, and evaluate the effectiveness of CPR in cardiac arrest scenarios. A normal ETCO2 level indicates a well-functioning respiratory system, while abnormal levels can help identify conditions such as hypoventilation, hyperventilation, and various pathophysiological states related to inadequate ventilation or perfusion.