AN OBSERVATIONAL STUDY OF CARDIOVASCULAR STRESS RESPONSE TO LARYNGOSCOPY WITH MCCOY, MACINTOSH, MILLER LARYNGOSCOPE BLADE FOR INTRAOPERATIVE ANAESTHESIA IN ADULT ELECTIVE SURGERIES

Abstract

Background: The most commonly used equipment to aid endotracheal intubation is a laryngoscope, and the procedure performed is known as laryngoscopy, which leads to profound cardiovascular effects. The process of laryngoscopy causes the release of catecholamines, thereby leading to marked pressor responses and tachycardia. The process of laryngoscopy can be made easier by the use of various types of laryngoscopic blades. This study was conducted to observe cardiovascular stress response to the laryngoscopy with McCoy, Macintosh, Miller laryngoscope blades for anaesthesia in adult elective surgeries. Material: This study was conducted in 51 patients in age group 18-60 years of both sexes, posted for elective surgeries under general anaesthesia in surgery and gynaecology operation theatre. In this study, 51 patients were randomly allocated into three groups each of 17 patients Grope 1 (McCoy Laryngoscope), Group 2 (Macintosh Laryngoscope), Group 3 (Miller Laryngoscope). There Results: was no signicant difference in age and gender distribution between three groups. There was no signicant difference in sex distribution between three groups. There was a signicant difference in mean heart rate between different groups from 2 to 5 mins. There was a signicant difference in mean SBP and DBP comparison between different groups from 1 to 5 mins. It is least with McCoy, most with Miller and in between with Macintosh. There was a signicant difference in Glottic view Distribution between three groups. Glottic visualisation is best with Miller blade. There was a signicant difference in Ease of Intubation Distribution between different groups. So tracheal intubation is easier with McCoy blade as compared with Macintosh and Miller blade. There was no signicant difference in Side Effects Distribution between different groups. Conclusion: It is concluded that the cardiovascular stress response (increased heart rate, blood pressure and mean arterial pressure) to laryngoscopy is least with McCoy laryngoscope and most with Miller laryngoscope and in-between with Macintosh laryngoscope.