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. 2022 Jul 1;22(3):149-155.
doi: 10.4103/2452-2473.348436. eCollection 2022 Jul-Sep.

Comparison of endotracheal intubation with Macintosh versus King Vision video laryngoscope using coronavirus disease 2019 barrier box on manikins: A randomized crossover study

Satyabrata Guru  1 , Neha Singh  2 , Sangeeta Sahoo  1 , Upendra Hansda  1 , Chittaranjan Mohanty  1
Affiliations

Comparison of endotracheal intubation with Macintosh versus King Vision video laryngoscope using coronavirus disease 2019 barrier box on manikins: A randomized crossover study

Satyabrata Guru et al. Turk J Emerg Med. .

Abstract

Background: Coronavirus disease 2019 (COVID-19) virus usually spreads through aerosol and close contact. Frontline health-care workers handle aerosol-generating procedures like endotracheal intubation. To reduce this risk, COVID-19 barrier box came into the picture. However, the COVID-19 barrier box may compromise easy and successful intubation, and their limitation must be studied.

Objectives: The objective of this study was to assess the time to successful intubation with or without the COVID-19 barrier box using the Macintosh laryngoscope and King Vision video laryngoscope (KVVL). We also assessed the first-pass success rate, ease of intubation, Cormack-Lehane (CL) grade, and requirement of external laryngeal manipulation.

Methods: We conducted this manikin-based randomized crossover study to assess the time to successful intubation by anesthesiologists (22) and emergency physicians (11) having 1 year or more experience with or without COVID-19 barrier box by using the Macintosh laryngoscope and KVVL. Our study randomized the sequence of the four different intubation scenarios.

Results: The comparison of mean duration of intubation between KVVL (13.21 ± 4.05 s) and Macintosh laryngoscope (12.89 ± 4.28 s) with COVID-19 barrier box was not statistically significant (95% confidence interval: 1.21-0.97). The ease of intubation, number of attempts, and requirement of external laryngeal manipulation were not statistically significant. Intubations were statistically significant more difficult with barrier box in view of higher CL grade.

Conclusion: Time to intubation was longer with COVID-19 barrier box using KVVL as compared to Macintosh laryngoscope which was statistically not significant.

Keywords: Coronavirus disease 2019; King Vision video laryngoscope; Macintosh laryngoscope; intubation; manikin.

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Conflict of interest statement

None Declared.

Figures

Figure 1
Figure 1
(a) aerosol box (b) dimension of aerosol box
Figure 2
Figure 2
Intubation using Macintosh laryngoscope and KVVL with and without COVID-19 barrier box. COVID-19: Coronavirus disease 2019, KVVL: King Vision video laryngoscope
Figure 3
Figure 3
Consort flowchart of study participants. (a) Intubation with Macintosh laryngoscope without COVID barrier box group, (b) Intubation with Macintosh laryngoscope with COVID barrier box group, (c) Intubation with KVVL without COVID barrier box, (d) Intubation with KVVL with COVID barrier box group. COVID-19: Coronavirus disease 2019, KVVL: King Vision video laryngoscope
Figure 4
Figure 4
Correlation between duration of intubation with Macintosh laryngoscope and years of experience
See this image and copyright information in PMC

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