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Updated: Jan 9, 2026

Author Spotlight: Advancing Awake Nasotracheal Intubation with Flexible Video Rhino-Laryngoscopes
Published on: August 2, 2024
Effectiveness of processing laryngoscopes used in surgical patients undergoing orotracheal intubation
Luiz Miguel de Paula Moura1, Adélia Dayane Guimarães Fonseca1, Luciane Ribeiro1
1Universidade Federal de Juiz de Fora. Juiz de Fora, Minas Gerais, Brazil.
Objectives:
to evaluate the effectiveness of processing laryngoscopes used in surgical patients undergoing orotracheal intubation.
Methods:
this was a descriptive, analytical, quantitative study conducted in a public hospital in Minas Gerais, Brazil, in two phases: assessment of the protein test and the persistence of simulated microorganisms on laryngoscopes. Data were analyzed using descriptive statistics and the Wilcoxon Signed Rank test.
Results:
a total of 48 samples were analyzed, distributed across 24 protein tests, 12 fluorescence analyses, and 12 visual inspections of the laryngoscope conditions. There was a significant reduction in protein levels after processing (z = -2.58, p < 0.010), with a moderate effect size (r = 0.74). However, all samples failed the qualitative assessment, as protein levels exceeded the acceptable limit of 1 µg/cm2.
Conclusions:
there was a reduction in simulated microorganisms. However, all protein tests failed, indicating the ineffectiveness of laryngoscope disinfection.
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