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Related Experiment Videos

Preliminary observations on the Colibri CO2-indicator

G A Petroianu1, W H Maleck, W F Bergler

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

The American Journal of Emergency Medicine
|November 25, 1998
PubMed
Summary

The Colibri CO2 indicator accurately monitored ventilation in mini-pigs during long procedures. It was unaffected by anesthetic gases or medications, showing reliable performance.

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Reply.

Canadian journal of anaesthesia = Journal canadien d'anesthesie·2016

Area of Science:

  • Veterinary Anesthesiology
  • Medical Device Technology
  • Respiratory Monitoring

Background:

  • Accurate carbon dioxide monitoring is crucial for patient safety during anesthesia.
  • Colorimetric CO2 detectors offer a simple, visual method for assessing ventilation.
  • The Colibri device is a novel colorimetric indicator for CO2 detection.

Purpose of the Study:

  • To evaluate the performance and reliability of the Colibri colorimetric CO2 indicator in a mini-pig model.
  • To assess potential interferences with the Colibri device during anesthesia.
  • To compare the Colibri's efficacy with existing CO2 detection methods.

Main Methods:

  • The Colibri CO2 indicator was tested in mini-pigs undergoing 8-hour procedures.
  • Interference testing included common anesthetic gases (nitrous oxide, halothane) and intratracheal medications.

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  • Ventilation frequencies up to 120/min were used to assess response.
  • Colorimetric readings were compared against a provided color chart.

    • Main Results:

    • The Colibri device demonstrated effective performance throughout 8-hour procedures.
    • No interference was observed from nitrous oxide, halothane, carbon monoxide, or tested intratracheal drugs.
    • The indicator provided a distinct color change even at high ventilation frequencies (up to 120/min).
    • A minor issue was noted in matching displayed colors to the reference chart.

    Conclusions:

    • The Colibri CO2 indicator is a reliable tool for monitoring ventilation and circulation in mini-pigs, especially when quantitative capnometry is unavailable.
    • Its performance is comparable to the EasyCAP detector, though both lack alarms and can be difficult to read in low light.
    • The device is suitable for use after initial endotracheal tube placement is confirmed by an esophageal detector device.