Hormonal stress response due to manipulation of the upper and lower respiratory tracts occurring during rigid bronchoscopy represents a potentially great hazard to safeanesthesia.There were many attempts to attenuate these adverse effects.Dexmedetomidine is highly selective, short-acting central alpha 2 agonist. It has increasingly gained popularity among anesthesiologists as adjuvant to general and regional anesthesia techniques. This study was conducted to ... Read more