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Reliability of cuff pressure gauges.

Julien Raft1,2, Anne-Sophie Lamotte3, Bruno Maury4

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Journal of Clinical Monitoring and Computing
|August 1, 2018
PubMed
Summary

Many endotracheal tube cuff pressure gauges lack reliability. This study found only 30% met accuracy standards, highlighting a critical need for improved medical device quality control.

Keywords:
CalibratorManometryReliabilityValidity

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Area of Science:

  • Anesthesiology
  • Medical Device Engineering
  • Patient Safety

Background:

  • Endotracheal tube cuff pressure monitoring is crucial during anesthesia.
  • Cuff pressure gauges are the primary recommended instruments for this monitoring.
  • Mandatory calibration is not currently required for these devices.

Purpose of the Study:

  • To evaluate the conformity and reliability of commonly used endotracheal tube cuff pressure gauges.
  • To assess the accuracy and performance of these devices against established criteria.

Main Methods:

  • A single-center study involving 27 cuff pressure gauges used in operating rooms.
  • Measurements were taken using a cuff pressure calibrator at various pressure levels (0-50 cmH2O).
  • Homologation criteria included leak test reliability and calibration accuracy (difference < 1.3 cmH2O in the 20-30 cmH2O range).

Main Results:

  • Only 30% (8/27) of the tested cuff pressure gauges met the homologation criteria.
  • 30% (8/27) failed the leak test, indicating potential issues with pressure maintenance.
  • 48% (13/27) exhibited calibration errors exceeding 1.3 cmH2O within the critical 20-30 cmH2O pressure range.

Conclusions:

  • A significant proportion of endotracheal tube cuff pressure gauges do not meet required accuracy and reliability standards.
  • The findings highlight a critical issue with the quality control and follow-up of these essential medical devices.
  • Reinforced biomedical engineering controls and regular calibration are suggested to ensure patient safety.