Comparative Study of IV Esmolol, IV Diltiazem, and IV Lignocaine Hydrochloride in Attenuating Pressure Response to Laryngoscopy and Intubation.

ABSTRACT

Not many studies have compared more than two drugs in attenuating pressor responses to laryngoscopy and intubation. This study compares four groups of considerable size. The present study compared intravenous esmolol, diltiazem, and lignocaine, for their efficacy to abate pressure response to laryngoscopy and intubation. METHODSThis is a prospective, randomized, double-blinded, controlled clinical study conducted among 220 patients of ASA grade I/II (age 18–60 years), undergoing elective surgical procedure requiring general anaesthesia with endotracheal intubation over a period of 15 months at a tertiary hospital setup. Study subjects were categorised as Groups D, E, L, and N that received diltiazem (0.2 mg/Kg IV), esmolol (2 mg/Kg IV), lignocaine (1.5 mg/Kg IV), and normal saline, respectively; each group had 55 patients. Haemodynamic parameters were recorded at baseline, after drug administration, immediately after intubation, and at 1-, 3-, and 5-minutes after intubation. Data entry and analysis were performed using MS Excel and SPSS-PC-17 version, respectively. One-way ANOVA and the chi-square test were used to evaluate the difference. P < 0.05 was considered significant. RESULTSA maximum increase in haemodynamic parameters occurred immediately after intubation. The increase in heart rate and rate pressure product were significantly lower in Group E (+2.93% & +15.31%), whereas the increase in blood pressure was lower in Group D (8.51%). CONCLUSIONSHaemodynamic stability during laryngoscopy and endotracheal intubation is an integral and essential goal of any anaesthetic management plan and was more effectively maintained with esmolol and diltiazem than with lignocaine.