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Related Experiment Videos

Carbon monoxide and nonquantitative carbon dioxide detection.

G Petroianu1, W Maleck, W Bergler

  • 1Department of Pharmacology, University of Heidelberg at Mannheim, Germany.

Prehospital and Disaster Medicine
|September 4, 1996
PubMed
Summary

Carbon monoxide (CO) poisoning does not affect CO2 detectors used for intubation. These devices reliably confirm correct endotracheal tube placement even with lethal CO concentrations.

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Area of Science:

  • Emergency Medicine
  • Anesthesiology
  • Toxicology

Background:

  • End-tidal carbon dioxide (CO2) detection confirms correct endotracheal tube placement, distinguishing it from esophageal intubation.
  • Out-of-hospital settings often lack quantitative capnography, necessitating reliable CO2 detectors.

Purpose of the Study:

  • To evaluate the performance of various CO2 detectors in the presence of carbon monoxide (CO).
  • To determine if CO interferes with CO2 detection for endotracheal tube placement verification.

Main Methods:

  • A simulated stomach model was ventilated with gas mixtures containing 5% CO, O2, N2O, and halothane.
  • Five different CO2 detectors (MiniCAP III, StatCAP, EasyCAP, PediCAP, Colibri) were tested.
  • The presence of end-tidal CO2 was monitored using these devices.

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Main Results:

  • None of the tested CO2 detectors signaled the presence of CO2 when exposed to CO.
  • This indicates no interference from CO with CO2 detection.

Conclusions:

  • CO does not interfere with infrared spectrometry or chemical CO2 detection methods.
  • CO2 detectors are safe for use in patients with CO poisoning to monitor endotracheal tube position.