A 35-year-old male presents with severe head trauma
A 35-year-old male presents with severe head trauma. Funduscopic examination demonstrates papilledema and increased intracranial pressure (ICP) and impending herniation is suspected. Mannitol is given and a decision is made to hyperventilate the patient as a last-ditch effort while waiting for neurosurgical evaluation. Which of the following is an appropriate target level of PCO2 for therapeutic hyperventilation?