What determines the effectiveness of positive-pressure ventilations in a head-injured patient?

The effectiveness of positive-pressure ventilations in a head-injured patient is primarily determined by immediate reassessment following the intervention. This is critical because head injuries can lead to a variety of complications, including respiratory distress or changes in neurological status. By performing an immediate reassessment, medical personnel can observe changes in the patient's vital signs, including oxygen saturation and respiratory effort, which directly reflect the success of the ventilation effort.

Monitoring these indicators helps to ensure that the patient is adequately oxygenated and that the airway remains secure. In the context of a head injury, rapid changes in the patient's condition can occur, so continuous assessment is necessary to make timely adjustments to the treatment plan if needed. The objective is to maintain optimal cerebral perfusion and oxygenation, which is crucial for patient outcomes.