Comparison of Stress Response to Laryngoscopy using Different Blades – The Macintosh, Mc Coy and Doshi Blade– A Prospective Randomised Study.

Jagdeep Singh Bhatia; Deepak Dwivedi; Saurabh Sud

Volume : VIII, Issue : VIII, August - 2018

Comparison of Stress Response to Laryngoscopy using Different Blades – The Macintosh, Mc Coy and Doshi Blade– A Prospective Randomised Study.

Jagdeep Singh Bhatia, Deepak Dwivedi, Saurabh Sud

Abstract :

Laryngoscopy is the vital step aiding endotracheal intubation. Macintosh curved blade is most commonly used in the anaesthesia practice. McCoy blade with its hinge avoid the lifting force at the vallecula thereby attenuating the pressor response. Doshi blade with its high web and better glottic visualization are the alternative choices available for laryngoscopy. This prospective randomised study was planned to compare the magnitude of the hemodynamic stress response with the use of these three laryngoscope blades. A total of 150 eligible patients were divided randomly into three groups, Group1 (Macintosh n=50), Group2(McCoy n=50), Group 3(Doshi blade n = 50). Results showed McCoy Blade to be superior to both Macintosh and Doshi blade in terms of change in heart rate and rise in mean arterial pressure resulting as a stress response to intubation. The Cormack Lehane view was when compared between the groups, McCoy group had Grade 1 view in 94% of the subjects followed by Doshi blade group with 84% and Macintosh blade group with 80% respectively. To conclude McCoy blade when used for the laryngoscopy is superior to the remaining two blades, when the stress response and glottic visualization is compared.