• Meena Singh, Arin Choudhury, Manpreet Kaur, Dootika Liddle, Mary Verghese, and Ira Balakrishnan.
• Department of Anaesthesia and Critical Care, JPNA Trauma Centre, All India Institute of Medical Sciences, New Delhi, India.
• Saudi J Anaesth. 2013 Apr 1;7(2):181-6.

BackgroundClonidine diminishes stress response by reducing circulating catecholamines and hence increases perioperative circulatory stability in patients undergoing laparoscopic surgeries. The aim of this study was to compare intravenous (IV) clonidine (2 μg/kg) with intramuscular (IM) clonidine (2 μg/kg) for attenuation of stress response in laproscopic surgeries.MethodsEighty adult patients classified as ASA physical status I or II, aged between 20 and 60 years undergoing elective cholecystectomy under general anesthesia were enrolled for a prospective, randomized, and double-blind controlled trial. They received either IV clonidine (2 μg/kg) 15 min prior to the scheduled surgery (Group I) or IM clonidine (2 μg/kg) 60-90 min prior to the scheduled surgery (Group II). Hemodynamic variables (Heart rate, systolic (SBP), diastolic (DBP), mean arterial pressure (MAP)), SpO2 and EtCO2 were recorded at specific times - baseline, prior to induction, 1 min after intubation, before CO2, insufflation, after CO2 insufflation at 1,5,10,20,30,45,60 min, after release of CO2, at 1 and 10 minutes after extubation. Secondary outcomes included evaluation of adverse effect profile of the two groups.ResultsNo significant difference was observed in the HR throughout the intraoperative period in between the two groups (P>0.05). There was statistically significant difference in SBP between the two groups starting from 1 minute after induction till 1 min after extubation (P<0.05) but not in DBP except at 1 minute after intubation (P=0.042). Significant difference in MAP was noted at 1 minute after intubation (P=0.004) and then from 5 minutes after CO2 insufflation to 1 minute after extubation (P<0.05). Incidence of adverse effects were higher in group II (P=0.02) especially incidence of hypertension requiring treatment (0.006).ConclusionWe conclude that under the conditions of this study, hemodynamic parameters (SBP, DBP and MAP) were better maintained in the IV as compared to the IM route that had significantly higher incidence of hypertension requiring treatment.

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