<prompt> A case of road traffic accident A came with head injury, BP is 9060, pulse is 150min. Which anesthetic agent should be used for induction.ThiopentoneKetamineHalothaneSuccinylcholine  <response>: A i.e. Thiopentone In head injury, induction is preferably done by thiopental or propofol both neuroprotectiveQ and a rapid onset NMBD usually rocuronium or mivacurium following adequate preoxygenation hyperventilation by mask. A barbiturate thiopentone - opioid - N20-NMBA technique is commonly used or intraoperative maintenance anesthesia. Ketamine, halothane, succinylcholine can increase ICP and are better avoidedQ, however, Sch can be used in difficult intubation. Glucose containing or hypotonic crystalloid solutions, sedation without airway control and vasodilators CCB, hydralazine, nitro-glycerine, nitroprusside and PEEP are also avoided or used very cautiously in head injury. 