This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
[{'content': 'All of the following lower intracranial pressure except- \nSelect and explain. \nA. Mannitol, B. Furosemide, C. Coicosteroids, D. Hyperventilation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Following steps are used to lower intracranial pressure Ventrititlostomy to drain CSF Elevate head end of bed Osmotherapy -- mannitol, hypeonic saline Glucocoiciods dexamethasone for vasogenic edema from tumor, abscess (avoid glucocoicoids in head trauma, ischemic and hemorrhagic stroke) Sedation (morphine, propofol, or midazolam) add neuromuscular paralysis if necessary Hyperventilation -to PaCO2 30-35 mmHg Pressor therapy--phenylephtine, dopamine, or norepinephrine to maintain adequate MAP to ensure CPP >/= 60 mmHg, Second-tier therapies for refractory elevated ICP High dose barbiturate therapy (pentobarb coma) Aggressive hyperventilation to Pam< 30 mmHg Hypothermia Hemicraniectomy Ref : Harrison 17/e p1722', 'role': 'assistant'}]