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Original Research

Open Access

Comparison of direct and video laryngoscopes in charcoal ingestion setting: a randomized cross-over simulation study

  • Young Shin Cho1
  • Young Hwan Lee2,*,

1Department of Emergency Medicine, Soonchunhyang University Seoul Hospital, 04401 Seoul, Republic of Korea

2Department of Emergency Medicine, Konkuk University Medical Center, Konkuk University School of Medicine, 05030 Seoul, Republic of Korea

DOI: 10.22514/sv.2023.061 Vol.19,Issue 4,July 2023 pp.174-179

Submitted: 20 June 2022 Accepted: 28 October 2022

Published: 08 July 2023

*Corresponding Author(s): Young Hwan Lee E-mail:


Choosing the right intubation method to increase the success rate and performing it quickly is very important in a difficult airway situation. We aimed to compare the endotracheal intubation success rates and completion time when using direct laryngoscopes (DL) and GlideScope video laryngoscopes (GVL) in an activated charcoal ingestion manikin simulation. This study was designed as a randomized cross over study in an activated charcoal ingestion simulated model. Physicians who had >30 successful endotracheal intubation (ETI) experiences participated in this study. The end points were successful ETI and the duration of ETI completion. In order to compare the degree of intubation difficulty, the participants rated the visual analog scale (VAS). A total of 38 people participated in this study. The success rate of the first attempt was 28/38 (73.7%) for DL and 37/38 (97.4%) for GVL (p < 0.01). The estimated duration to successful ETI were 45.5 s (26–69) for DL and 28 s (23–35) for GVL, respectively (p < 0.01). VAS score for the difficulty of intubation was lower in GVL than DL (p < 0.01). Using GVL had higher first pass success rate and was faster and easier than DL when intubating patients with activated charcoal ingestion in a simulated situation.


Intubation; Charcoal; Simulation; Direct laryngoscope; Video laryngoscope

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Young Shin Cho,Young Hwan Lee. Comparison of direct and video laryngoscopes in charcoal ingestion setting: a randomized cross-over simulation study. Signa Vitae. 2023. 19(4);174-179.


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