A Comparative Evaluation of Truview and Macintosh Laryngoscopes for Tracheal Intubation

4,5 mortality. *Assistant Professor, **Professor, ***Associate Professor, ****Professor and Head of Dept., Lokmanya Tilak Municipal Medical College and Lokmanya Tilak Municipal General Hospital, Sion, Mumbai-400 022. Abstract Introduction: Truview EVO2 is a modified laryngoscope that provides a 42o anterior view facilitating visualisation of the glottis without alignment of oropharyngeal and tracheal axes. We compared laryngoscopic view, intubation ease and haemodynamic parameters of Truview with the conventional Macintosh laryngoscope. Methods: Two hundred patients undergoing elective surgeries were randomised into two groups to undergo tracheal intubation with either Truview or Macintosh laryngoscopes. The glottic view, need for external laryngeal manipulation, time taken for laryngoscopy, resuming effective ventilation, number of attempts, haemodynamic parameters and complications were evaluated. Results: Truview showed better results for glottic view (90% grade I, 10% grade II Vs 61% grade I, 38% II and 1% III with Macintosh) (p < 0.0001) and requirement of external laryngeal manipulation (11% Vs 22%; p = 0.046). However, it required longer time for laryngoscopy (18.90 ± 12.33 seconds Vs 15.30 ± 05.43 seconds; p = 0.044) and resuming effective ventilation (45.45 ± 25.02 seconds Vs 26.77 ± 13.17 seconds; p = 0.008). Significantly more number of patients required more than one attempt with Truview (86% first, 12% second, 2% > 2 attempts Vs 98%, 1%, 1% with Macintosh). Haemodynamics were comparable between the groups. The incidence of sore throat was similar. Lip and gum injuries were higher in the Truview group. Conclusion: Truview laryngoscope provides excellent glottic view compared to Macintosh with similar changes in haemodynamics. However, time taken for intubation was longer with Truview. A Comparative Evaluation of Truview and Macintosh Laryngoscopes for Tracheal Intubation