Comparison of Direct and Indirect Laryngoscopes in Vomitus and Hematemesis Settings: A Randomized Simulation TrialReport as inadecuate

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BioMed Research International - Volume 2015 2015, Article ID 806243, 6 pages -

Research ArticleDepartment of Anesthesiology, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka, Japan

Received 16 May 2015; Accepted 6 September 2015

Academic Editor: Pavel Michalek

Copyright © 2015 Ryosuke Mihara et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Background. Videolaryngoscopes may not be useful in the presence of hematemesis or vomitus. We compared the utility of the Macintosh laryngoscope McL, which is a direct laryngoscope, with that of the Pentax-AWS Airwayscope AWS and McGRATH MAC McGRATH, which are videolaryngoscopes, in simulated hematemesis and vomitus settings. Methods. Seventeen anesthesiologists with more than 1 year of experience performed tracheal intubation on an adult manikin using McL, AWS, and McGRATH under normal, hematemesis, and vomitus simulations. Results. In the normal setting, the intubation success rate was 100% for all three laryngoscopes. In the hematemesis settings, the intubation success rate differed significantly among the three laryngoscopes . In the vomitus settings, all participants succeeded in tracheal intubation with McL or McGRATH, while five failed in the AWS trial with significant difference . The intubation time did not significantly differ in normal settings, while it was significantly longer in the AWS trial compared to McL or McGRATH trial in the hematemesis or vomitus settings , compared to McL or McGRATH in both settings. Conclusion. The performance of McGRATH and McL can be superior to that of AWS for tracheal intubation in vomitus and hematemesis settings in adults.

Author: Ryosuke Mihara, Nobuyasu Komasawa, Sayuri Matsunami, and Toshiaki Minami



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