Effect of Preoperative Intravenous and Inhalational Dexmedetomidine on the Hemodynamic Response of Laryngoscopy: A Prospective Double-blinded Randomized Study.

Objective: Laryngoscopy induces potent noxious stimuli causing reflex autonomic activation manifested by an increase in blood pressure and heart rate (HR). Various drugs with different routes have been tried to prevent this response. The literature comparing inhalational dexmedetomidine with intravenous (IV) dexmedetomidine to prevent laryngoscopy response is limited.