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. 2018 Sep-Oct;68(5):499-506.
doi: 10.1016/j.bjan.2018.04.003. Epub 2018 Jul 10.

[Comparison of King Vision video laryngoscope and Macintosh laryngoscope: a prospective randomized controlled clinical trial]

[Article in Portuguese]
Basar Erdivanli  1 , Ahmet Sen  2 , Sule Batcik  2 , Tolga Koyuncu  2 , Hizir Kazdal  2
Affiliations

[Comparison of King Vision video laryngoscope and Macintosh laryngoscope: a prospective randomized controlled clinical trial]

[Article in Portuguese]
Basar Erdivanli et al. Braz J Anesthesiol. 2018 Sep-Oct.

Abstract

Background and objectives: We compared the efficiency of the King Vision video laryngoscope and the Macintosh laryngoscope, when used by experienced anesthesiologists on adult patients with varying intubating conditions, in a prospective randomized controlled clinical trial.

Methods: A total of 388 patients with an American Society of Anesthesiologists physical status of I or II, scheduled for general anesthesia with endotracheal intubation. Each patient was intubated with both laryngoscopes successively, in a randomized order. Intubation success rate, time to best glottic view, time to intubation, time to ventilation, Cormack–Lehane laryngoscopy grades, and complications related to the laryngoscopy and intubation were analyzed.

Results and conclusions: First pass intubation success rates were similar for the King Vision and the Macintosh (96.6% vs. 94.3%, respectively, p > 0.05). King Vision resulted in a longer average time to glottic view (95% CI 0.5–1.4 s, p < 0.001), and time to intubation (95% CI 3–4.6 s, p < 0.001). The difference in time to intubation was similar when unsuccessful intubation attempts were excluded (95% CI 2.8–4.4 s, p < 0.001). Based on the modified Mallampati class at the preoperative visit, the King Vision improved the glottic view in significantly more patients (220 patients, 56.7%) compared with the Macintosh (180 patients, 46.4%) (p < 0.001). None of the patients had peripheral oxygen desaturation below 94%. Experienced anesthesiologists may obtain similar rates of first pass intubation success and airway trauma with both laryngoscopes. King Vision requires longer times to visualize the glottis and to intubate the trachea, but does not cause additional desaturation.

Keywords: Airway management; Anestesia geral; Direct laryngoscopy; Endotracheal intubation; General anesthesia; Intubação endotraqueal; Laringoscopia direta; Manejo de vias aéreas; Video laryngoscopy; Videolaringoscopia.

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Figures

Figure 1
Figure 1
Consort flow diagram of the study.
Figure 2
Figure 2
Graphical presentation of Mallampati classes and corresponding Cormack–Lehane laryngoscopy grades obtained with the Macintosh.
Figure 3
Figure 3
Graphical presentation of Mallampati classes and corresponding Cormack–Lehane laryngoscopy grades obtained with the King Vision.
Figure 4
Figure 4
Graphical presentation of improvement in glottic views obtained with the King Vision compared with the Macintosh.
See this image and copyright information in PMC

References

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