Inhalation agent of choice in head injury with raised ICT is ?

Ans. is 'a' i.e., Isoflurane Isoflurane It is an isomer of enflurane with similar propeies but 11/2 times more potent. BP falls due to vasodilation, while cardiac output is maintained inhalation anaesthetic of choice in Cardiac surgery (intravenous anaesthetic of choice for cardiac surgery is etomidate). It does not sensitize the hea to Adr --> Safe in pheochromocytoma. Isoflurane causes minimum increase in ICT Preferred agent in increased ICT. It does not provoke seizures --> preferred in neurosurgery. Uterine and skeletal muscle relaxant action is similar to halothane --> can be used for assisting version as an alternative to halothane. It causes significant respiratory depression. Isoflurane is the volatile agent of choice in liver disease as it has least effect on hepatic blood flow. It can cause coronary steal phenomenon. It can be used for day care surgery (also sevoflurane and desflurane). It is also used to produce controlled hypotension, as it causes maximum decrease in systemic vascular resistance.