Comparative Study of Preoperative Intravenous Dexmedetomidine Versus Preoperative Intravenous Midazolam On the Incidence of Emergency Delirium in Pediatric Patients Undergoing Tonsillictomy and Adenoidectomy a Prospective Randomized Clincal Trial

Emergence delirium (ED) is a common neurologic complication that can not only distress children and their families in the early postanesthetic period, but can also have adverse effects on children in the long-term Emergence delirium (ED) is an acute confusion state during recovery from anesthesia; patients with ED may present with disorientation, hallucination, restlessness, and purposeless hyperactive physical behavior . ED is not fully equivalent to EA; ED can involve hypoactive signs or mixed forms and hyperactive signs similar to agitation . Nevertheless, the terms EA and ED have been used interchangeably in several studies Pediatric patients undergoing tonsillectomy and adenoidectomy usually have a high incidence of POED, which increases the risk of developing postoperative airway obstruction and respiratory depression due to anatomical characteristics of operative location and increased susceptibility to opioid analgesics.

Postoperative emergence delirium develops in 12% to 18% of all children undergoing general anesthesia for surgery.

dexmedetomidine, is a selective alpha-2 agonist, which works in the brain and spinal cord that has sedative, analgesic and anxiolytic properties. Dexmedetomidine also has the ability to lower the overall anesthetic requirements by reducing sympathetic outflow in response to painful surgical stimulation.

Midazolam is a widely used intravenous anesthetic agent with rapid onset, short duration of action and relatively rapid plasma clearance. It is mainly used to produce preoperative sedation and the induction of general anesthesia The action of midazolam can be explained through its action on gammaaminobutyric acid (GABA) receptors. GABA receptors mediate inhibitory neurotransmission in the central nervous system In our study we aim to compares the effectiveness of preoperative intravenous dexmedetomidine versus intravenous midazolam for the prevention of emergence delirium in pediatric patients undergoing tonsillectomy , adenoidectomy or both . .