Capnometry

What Is Capnometry?

Capnometry is the precise measurement of carbon dioxide (CO2) concentration in exhaled air, primarily indicated as end-tidal CO2 (ETCO2). Not to be confused with capnography, which visualizes CO2 levels over time through a continuous waveform, capnometry provides a discrete value that is critical in EMS settings. This measurement is essential for assessing ventilation adequacy, confirming proper endotracheal tube placement, and monitoring metabolic status during patient care, particularly in scenarios governed by NIMS or ICS protocols.

Why Capnometry Matters on the Fireground

The accurate assessment of capnometry is vital for EMS personnel to swiftly determine respiratory function and the effectiveness of ventilation strategies. This capability is particularly crucial in high-stakes situations such as cardiac arrest or severe respiratory distress, where timely interventions can significantly influence patient outcomes.