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A male patient with a closed head injury opens his eyes in response to pain, makes incomprehensible sounds, and responds to pain with flexion of his arms. His Glasgow Coma Scale score is __, and the MOST appropriate treatment for him involves:A. 6, intubation hyperventilation at a rate of 20 breaths/min, two large-bore IV lines running wide open, keeping him warm, and maintaining his oxygen saturation at greater than 90%B. 7, intubation, ventilations performed at a rate of 12 breaths/min, IV fluids as needed to maintain a systolic blood pressure of at least 90mmHG, and maintaining his oxygen saturation at greater than 90%C. 9, high-flow oxygen via nonrebreathing mask, IV fluids as needed to maintain a systolic blood pressure of at least 100mmHg, monitoring his oxygen saturation, and administering 1.5 mg/kg of lidocaine to decrease intracranial pressureD. 8, ventilation assistance with a bag-mask device, a 2 L bolus of normal saline or lactated ringer solution, elevating his head 12inches, and hyperventilating him if his heart rate falls below 60 beats/min

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