Authors : Sai Anand I, Malavika Kulkarni, Nisha Sara M Jacob, Muralidhar Kulkarni, Laxmi Shenoy
DOI : 10.18231/j.ijca.2019.089
Volume : 6
Issue : 3
Year : 2019
Page No : 463-467
Introduction: Laryngoscopy forms an important part of general anaesthesia and endotracheal intubation. Laryngoscope blades of different shapes have been designed and studied.
Objective: We compared Macintosh and Mac Doshi blades for laryngoscopic view, time for intubation and cardiovascular response during intubation.
Materials and Methods: Following Institutional ethical committee approval, this prospective randomized study was undertaken in 160 patients scheduled for elective surgery requiring orotracheal intubation assigned into two groups: group M (Macintosh) and group D (Mac Doshi). After intravenous induction, laryngoscopy was performed, and trachea intubated. Ease of glottic visualization and ease of intubation were noted as per Cormack Lehane (CL) scale and Arino scale respectively. The haemodynamic variables were also noted at regular time intervals.
Results: Ease of glottic visualization and intubation assessed through CL grade (P=0.65) and Arino scale (P=0.084) were comparable in both groups using Fisher’s exact test. Time to glottic visualization was 8.24±3.03 seconds for Macintosh group and 8.44±3.73 seconds for Mac Doshi group (p=0.7). Time to intubate was 30.29±11.47 seconds for Macintosh and 27.25±7.03 seconds for Mac Doshi group (P=0.046). All haemodynamic parameters were also comparable without clinical significance.
Conclusion: Macintosh blade and Mac Doshi were found to be comparable in terms of ease of glottic visualization and intubation. There was no difference in time taken for glottic visualisation, time for intubation and haemodynamic parameters between the two groups.
Keywords: Laryngoscopy, Macintosh blade, Mac Doshi blade, General anaesthesia, Ease of intubation.