What is the pathophysiological basis for the ventilator settings of intubation with controlled mechanical ventilation to PaCO₂ after evacuation of hematoma in a male client with intracranial pressure (ICP) caused by being hit by a car while dodging through traffic?
1) Hypoxemia reduces ICP.
2) Hypocapnea reduces ICP.
3) Hyperventilation reduces the need for temperature control.
4) Controlled ventilation reduces the need for oxygen to the brain.