Risk of airway fire with the use of KTP laser and high flow humidified oxygen delivery in a laryngeal surgery model

Lucy Huang, Adam Badenoch, Marthinus Vermeulen, Shahid Ullah, Charmaine Woods, Theodore Athanasiadis, Eng Hooi Ooi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Airway surgery presents a unique environment for operating room fire to occur. This study aims to explore the factors of combustion when using KTP laser with high flow oxygen in an ex-vivo model. The variables tested were varying tissue type, tissue condition, oxygen concentration, laser setting, and smoke evacuation in a stainless-steel model. Outcome measures were time of lasing to the first spark and/or flame. A multivariate Cox proportional hazard model was used to determine the risk of spark and flame across the different risk factors. For every 10% increase in oxygen concentration above 60% the risk of flame increased by a factor of 2.3. Continuous laser setting at 2.6 W increased the risk by a factor of 72.8. The risk of lasing adipose tissue is 7.3 times higher than that of muscle. Charred tissue increases the risk of flame by a factor of 92.8. Flame occurred without a preceding spark 93.6% of the time. Using KTP laser in the pulsed mode with low wattages, minimising lasing time, reducing the oxygen concentration and avoiding lasing adipose or charred tissue produce a relatively low estimated risk of spark or flame.

Original languageEnglish
Article number543
Number of pages9
JournalScientific Reports
Volume12
DOIs
Publication statusPublished - 11 Jan 2022

Keywords

  • laryngeal surgery
  • KTP laser
  • high flow oxygen
  • airway fire
  • endotracheal tubes (ETT)
  • THRIVE

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