capnography
Pronunciation: kap-nog-ruh-fee
Continuous monitoring technique that measures and displays real-time carbon dioxide levels in exhaled breath throughout the respiratory cycle.
Full Definition
Capnography is a vital monitoring technique that provides continuous, breath-by-breath measurement and graphical display of carbon dioxide concentration in exhaled gases. The technology uses infrared light absorption to detect CO2 levels, producing a waveform called a capnogram that shows CO2 concentration over time. End-tidal CO2 (ETCO2) values typically correlate with arterial CO2 levels, making capnography valuable for monitoring ventilation adequacy, detecting airway problems, and confirming endotracheal tube placement. The characteristic shape of the capnogram can reveal important clinical information about airway obstruction, ventilation-perfusion mismatches, and breathing patterns.
Usage
Usage note: Single word; do not hyphenate or separate.
In Context
- "Capnography confirmed proper endotracheal tube placement with normal waveform morphology." — Intubation verification
- "The abnormal capnography tracing suggested bronchospasm in the mechanically ventilated patient." — Clinical assessment note