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Laryngoscope brightness determined by visual inspection and during mannequin laryngoscopy

  • Gaurav Arora
  • Paul A. Brousseau
  • Andrew D. MilneEmail author
Correspondence
  • 71 Downloads

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...

Notes

Conflicts of interest

None declared.

Editorial responsibility

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

Funding

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

References

  1. 1.
    Nishiyama T. Changes in the light intensity of the fiberoptic laryngoscope blade by steam sterilization. Anesth Analg 2007; 104: 908-10.CrossRefGoogle Scholar
  2. 2.
    Dobson G, Chong M, Chow L, et al. Guidelines to the practice of anesthesia – revised edition 2018. Can J Anesth 2018; 65: 76-104.CrossRefGoogle Scholar
  3. 3.
    Milne AD, Brousseau PA, Brousseau CA. Effects of laryngoscope handle light source on the light intensity from disposable laryngoscope blades. Anaesthesia 2014; 69: 1331-6.CrossRefGoogle Scholar
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    Baker PA, Raos AS, Thompson JM, Jacobs RJ. Visual acuity during direct laryngoscopy at different illuminance levels. Anesth Analg 2013; 116: 343-50.CrossRefGoogle Scholar
  5. 5.
    International Organization for Standardization. ISO 7376-2009: Anesthetic and Respiratory Equipment. Laryngoscopes for Tracheal intubation. Available from URL: https://www.iso.org/standard/44073.html (accessed July 2018).

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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