<prompt> All are features of emergence delirium with ketamine anesthesia except:-Visual illusionsCoical blindnessNo hallucinationAuditory, proprioceptive and confusional illusions  <response>: Despite its reputation as a hallucinogen, sub-anesthetic ketamine does not consistently produce frank hallucinations. 5 - 30 patients receiving intravenous ketamine has incidence of postoperative delirium and hallucination associated with it. prevention and treatment - intravenous midazolam 