Which change in status should alert the nurse to increased intracranial pressure (ICP) in a child with a head injury?

Choice A rationale Increased intracranial pressure (ICP) typically presents with an irregular respiratory pattern, such as Cheyne-Stokes or central neurogenic hyperventilation, not rapid, shallow breathing, which is more characteristic of metabolic acidosis or shock. A change in the rate and rhythm of breathing is a late and ominous sign, often indicating brainstem compression and severe deterioration. Choice B rationale Late-stage, severe ICP elevation that progresses to Cushing's triad typically causes a bradycardia, which is an irregular, slow heart rate, rather than a rapid one. A rapid heart rate (tachycardia) is more commonly associated with hypovolemic shock or fever. Bradycardia is a parasympathetic response to the body's attempt to maintain cerebral perfusion pressure. Choice C rationale Increased ICP is characterized by Cushing's triad, which includes an increase in systolic blood pressure, widening pulse pressure (the difference between systolic and diastolic pressures), and bradycardia. An increased diastolic pressure with a narrowing pulse pressure is the opposite of the expected finding and is not a classic sign of significantly elevated ICP. Choice D rationale Confusion, restlessness, and a change in the level of consciousness or responsiveness (altered mental status) are often the earliest and most reliable signs of increasing intracranial pressure in a child. As ICP rises, cerebral perfusion pressure decreases, leading to cerebral ischemia and hypoxia, which directly impair cognitive function and alertness, making this the most critical initial alert sign.