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. 2020 Aug;64(Suppl 3):S186-S192.
doi: 10.4103/ija.IJA_313_20. Epub 2020 Aug 15.

A randomised comparative study of "videoendoscope" with the Truview EVO2, C-MAC D blade videolaryngoscope and the Macintosh laryngoscope

Ameya Pappu  1 , Bimla Sharma  1 , Rashmi Jain  1 , Naresh Dua  1 , Jayashree Sood  1
Affiliations

A randomised comparative study of "videoendoscope" with the Truview EVO2, C-MAC D blade videolaryngoscope and the Macintosh laryngoscope

Ameya Pappu et al. Indian J Anaesth. 2020 Aug.

Abstract

Background and aims: Videolaryngoscopes are crucial components of a difficult airway cart. Issues of cost and availability, however, remain a problem. We compared the combination of an endoscope used in conjunction with the Macintosh laryngoscope with established videolaryngoscopes and the Macintosh laryngoscope using the intubation difficulty scale (IDS) score.

Materials and methods: A prospective randomised study including 120 adult patients, American Society of Anaesthesiologists (ASA) physical status I-III, with an anticipated difficult airway scheduled for elective surgery were randomly allocated to one of four groups: Truview EVO2 (group 1), C-MAC D Blade (group 2), videoendoscope (group 3), or Macintosh laryngoscope (group 4). The IDS score was the primary outcome. Secondary outcomes included the Cormack-Lehane grade, time to tracheal intubation, haemodynamic responses, and adverse events.

Results: A significant proportion of patients in groups 2 and 3 had an IDS score of zero (73.3 and 70%, respectively). IDS scores were significantly lower in the C-MAC D blade and videoendoscope groups attributable to differences in parameters N4, N5 and N6 [C/L grades, lifting force and laryngeal pressure required] (P < 0.001). The C-MAC D blade and the Macintosh laryngoscope required less time for intubation as compared to the Truview EVO2 and videoendoscope. No differences were noted in post-intubation haemodynamic parameters and other adverse events.

Conclusion: The performance of videoendoscope was comparable to C-MAC D Blade and superior to Truview EVO2 and Macintosh laryngoscope with respect to the IDS score and may thereby provide an effective alternative to commercial videolaryngoscopes in low resource settings.

Keywords: Anaesthesia; endoscope; intubation; laryngoscopy; videolaryngoscope.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
(a) Truview EVO2 with O2insufflation tube, (b) C-MAC D Blade with monitor, (c) Videoendoscope and, (d) Macintosh laryngoscope
Figure 2
Figure 2
Consort flow diagram
See this image and copyright information in PMC

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