Anesthesia: Essays and Researches 2017 11(4):834-841
Context: Laryngoscopy and intubation performed during RSI lead to choroidal blood volume increase and an eventual rise in intraocular pressure (IOP). Use of succinylcholine (SCh) causes an undesirable rise in IOP which is further aggravated by laryngoscopy and endotracheal intubation. Dexmedetomidine is a highly selective centrally acting α2adrenergic agonist that has IOP lowering properties. Aims: This study aims to evaluate the efficacy of intravenous (i.v.) infusion of dexmedetomidine (0.5 μg/kg) as premedication in attenuating the rise of IOP and adverse effect if any caused by SCh in patients undergoing RSI for general anesthesia. Settings and Design: This was a double-blind, randomized trial. Subjects and Methods: Sixty adult patients in the age group of 20–50 years scheduled for elective surgeries under general anesthesia. Group I (dexmedetomidine group) (n = 30) received i.v. infusion of dexmedetomidine (0.5 μg/kg) and Group II (control group) (n = 30) received i.v. infusion of 50 ml normal saline as premedication Statistical Analysis Used: The analysis was done using Statistical Package for Social Sciences Version 15.0 statistical Analysis Software. Results: It was observed that Group I (dexmedetomidine group) had a better attenuating effect over the increases in IOP in patients undergoing RSI for general anesthesia using SCh. An increase in IOP was seen in Group II (control group) patients with RSI. Conclusions: The findings in the present study indicate that i.v. dexmedetomidine effectively attenuates the increases in IOP with an additional advantage of control on hemodynamic responses following RSI.
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