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Updated: Oct 2, 2026

Evaluation of Capnography Sampling Line Compatibility and Accuracy when Used with a Portable Capnography Monitor
Published on: September 29, 2020
Capnography: beyond the numbers
1IHC Adult Life Flight, LDS Hospital, Salt Lake City, Utah 84143, USA.
Abstract:
Detecting end-tidal pressure of carbon dioxide (PetCO2) is becoming increasingly common in the emergency transport setting. Several CO2 detection devices are suitable for emergency transport, including colorimetry, capnometry, and capnography. Capnography is the only device that displays a waveform of CO2 levels throughout the respiratory cycle. Analysis of this waveform is key to avoiding therapeutic errors. End-tidal PCO2 is best used for verifying endotracheal and nasal gastric tube placement and assessing the effectiveness of CPR. The use of capnography as a means of guiding manual or mechanical ventilatory therapy is unreliable in unstable, critically ill, or injured patients.
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