Prospective Randomized Controlled Study to assess the Role of Dexmedetomidine on Perioperative Hemodynamics in Patients with Supratentorial Tumor undergoing Surgery

Abstract

The stress response to an intense painful surgical stimulus is characterized by activation of the sympathetic nervous system and an increased secretion of the stress hormones. The ability of the alpha agonist dexmedetomidine (DEX) to decrease heart rate (HR) and arterial blood pressure in perioperative period was tested. One hundred and thirty two patients undergoing craniotomy for supratentorial tumor were randomly distributed to receive either saline (B group) or DEX (A group). The placebo group received saline, whereas the treatment group (A group) received a single bolus dose of DEX (1µg/kg) intravenously over 10 minutes before induction of anesthesia. Hemodynamic parameters, such as HR and arterial blood pressure were measured. Both the groups were comparable with respect to age, sex, American Society for Anesthesiologist grade, and duration of surgery. The arterial blood pressure and HR were found to be lower in the DEX group when compared with the placebo group.