Capnography Waveform

What Is Capnography Waveform?

A capnography waveform is the graphical representation of the concentration of exhaled carbon dioxide (CO2) over time, providing critical insights during patient ventilation. Not to be confused with capnometry, which solely delivers numerical CO2 values, the waveform offers a visual assessment of ventilation status, airway integrity, and circulatory function in real time. This data is essential in emergency medical care, particularly within the context of START triage and other incident command systems. In EMS contexts, it is commonly framed alongside structured communication and triage concepts such as START (Simple Triage and Rapid Treatment) or SALT (Sort, Assess, Lifesaving interventions, Treatment/Transport) as shared terminology.

Why Capnography Waveform Matters on the Fireground

The capnography waveform facilitates the early identification of respiratory distress, airway obstructions, or variations in cardiac output, which are vital for prompt medical interventions. Its real-time feedback is crucial in managing patient care effectively during emergencies. Clear definitions improve handoffs, documentation clarity, and team alignment when multiple providers must prioritize tasks under time pressure.