Vol 5, No 3 (2020)
Research paper
Published online: 2020-09-16

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VieScope® laryngoscope versus Macintosh laryngoscope during difficult intubation performed by paramedics: a randomized cross-over manikin trial

Maciej Maslanka12, Jacek Smereka32, Lukasz Czyzewski42, Jerzy Ladny52, Marek Dabrowski62, Lukasz Szarpak72
Disaster Emerg Med J 2020;5(3):134-141.


INTRODUCTION: The aim of this study was to evaluate intubation performance by paramedics using Macintosh
laryngoscope and VieScope® laryngoscope under simulated difficult airway conditions.

METHODS: In a randomized, single-blinded, cross-over simulation trial, 42 paramedics performed endotracheal
intubation using VieScope® and Macintosh (MAC) laryngoscopes in two difficult airway scenarios: (A)
tongue edema, (B) manual cervical inline stabilization. The order of participants and intubation methods was
random. Time to ventilation constituted the primary outcome, and the secondary outcomes were the success
rate of first intubation attempt, overall intubation success rate, Cormack and Lehane grade, and ease of use.

RESULTS: In scenario A, the median overall intubation time was 55s (46–109) in the MAC group and 30.5s
(26–35) in the VieScope® group (p < 0.001). The efficacy of the first intubation attempt with MAC and Vie-
Scope® varied and amounted to 64.3% vs. 95.2% (p < 0.001). During scenario B, VieScope® offered better
intubation conditions than MAC (p < 0.001), including shorter intubation time, higher first attempt and
overall intubation success rates, as well as better glottic view.

CONCLUSIONS: In this simulation trial, we found that VieScope® could be successfully used for intubation in
difficult airways by paramedics with little simulation experience with this device. VieScope® was associated
with shorter time and higher success rates of intubation attempt compared with MAC. Nevertheless, we
recommend that the performance of VieScope® and MAC should be further evaluated in the clinical setting
to confirm our results.

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