a 32 year old man is struck several times in the head with a baseball bat. upon emergency medical service arrival, he is mildly confused, vomits once, and complains of a severe headache. the emergency medical technicians establish two large-bore ivs. prior to arrival at the emergency department, he loses consciousness and begins to seize. he is actively seizing when he is brought into the trauma bay. what should be the first step in the management of this patient?