Definition & Operational Usage
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.
Category context: Patient care, assessment, interventions, triage, and EMS system terms commonly used by firefighter/medics.
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