Research Paper

Comparison Of Laryngoscopic View And Intubation Response To Laryngoscopy Using Macintosh And Mccoy Blade

Abstract :

Laryngoscopes are most commonly used for endotracheal intubation. Laryngoscopy is known to have profound cardiovascular effects. These include pressor response and tachycardia along with an increase in catecholamine concentration.To ease the process of intubation laryngoscopic blades of different shapes have been designed.The Macintosh is one of the most popular blades. Cervical spine movement is greater with the Macintosh blade compared with the McCoy blade. McCoy blade is modification of standard Macintosh blade incorporating a hinged tip blade. It allows elevation of epiglottis while decreasing overall laryngeal movement.This study is undertaken to compare changes in haemodynamic parameters before,during and after laryngosopy using these two blades. 100 patients of ASA grade I and II in the age group of 18- 45 years of either sex undergoing elective surgeries under general anaesthesia were included after obtaining informed written consent.The visualisation of larynx, using Cormack and Lehane grading was significantly better in McCoy group compared to MacIntosh group with p=0.04.Haemodynamic parameters HR,SBP,DBP,MAP were increased in both the groups but were statistically and clinically significant in MacIntosh group with p= <0.001.McCOY blade improves visualisation of larynx and is associated with significantly less marked haemodynamic response to laryngoscopy in comparison with MacIntosh blade.

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