Laryngoscope brightness determined by visual inspection and during mannequin laryngoscopy

  • Gaurav Arora
  • Paul A. Brousseau
  • Andrew D. MilneEmail author

To the Editor,

Adequate light intensity is crucial for visualization during laryngoscopy. This can be problematic as light intensity of laryngoscope blades deteriorates with repeated use and cleaning.1 Typically, laryngoscope function is checked by simple visual assessment of blade light brightness prior to induction. While the Canadian Guidelines to the Practice of Anesthesia stipulate that laryngoscopes must be checked prior to use, they do not specify a method.2 The aim of this present study was to compare the adequacy of laryngoscope blade light brightness, as perceived by simple visual inspection, with the adequacy of illumination during direct laryngoscopy performed on a mannequin.

After institutional research ethics board approval (CDHA-RS2014-074, July 2013), a convenience sample of 35 anesthesia staff and residents (n = 25 and 10, respectively) provided written informed consent to participate. A laryngoscope brightness testing chamber 3was employed to identify ten...


Conflicts of interest

None declared.

Editorial responsibility

This submission was handled by Dr. Steven Backman, Associate Editor, Canadian Journal of Anesthesia.


This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.


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Copyright information

© Canadian Anesthesiologists' Society 2018

Authors and Affiliations

  • Gaurav Arora
    • 1
  • Paul A. Brousseau
    • 2
  • Andrew D. Milne
    • 1
    • 3
    Email author
  1. 1.Department of Anesthesia, Pain Management, and Perioperative MedicineDalhousie UniversityHalifaxCanada
  2. 2.Department of AnesthesiaQEII Health CentreHalifaxCanada
  3. 3.School of Biomedical EngineeringDalhousie UniversityHalifaxCanada

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