Classical sign of raised ICP is?

Appeared in: VSSC Nursing Officer - 2021

Explanation

Bradycardia (slow heart rate) is a cardinal component of Cushing's triad.
Cushing's triad is a late, classical, and life-threatening sign of severely increased intracranial pressure (ICP).
It represents the brain's final attempt to maintain cerebral perfusion against high ICP, leading to brainstem compression.
The triad consists of hypertension (with a widening pulse pressure), bradycardia, and irregular respirations.

Option A: Raised ICP leads to a compensatory increase, not a decrease, in systolic blood pressure to maintain cerebral perfusion.
Option B: While hypertension is a component of Cushing's triad, it is the body's initial pressor response. The subsequent bradycardia is a more specific paradoxical reflex that is highly characteristic of this dangerous state.
Option C: Pressure on the brainstem's respiratory center causes respirations to become slow and irregular (bradypnea), not fast (tachypnea).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Signs of Increased Intracranial Pressure (ICP) and Cushing's Triad as background academic context rather than a clinical decision trigger.
Recognizing Cushing's triad is a critical nursing skill, as it signals impending brain herniation, a neurological emergency requiring immediate intervention.
Nurses must continuously monitor vital signs, neurological status (GCS), and pupil response in at-risk patients to detect these changes early.
What if? If the patient showed restlessness, headache, and vomiting, the priority would be to manage these early signs of increased ICP to prevent progression to Cushing's triad. Interventions would include elevating the head of the bed and notifying the physician for potential osmotic therapy.

How to Approach the Question

First, identify the keywords in the question: 'classical sign' and 'raised ICP'.
This should trigger recall of the signs and symptoms of increased intracranial pressure, specifically differentiating between early and late signs.
The term 'classical sign' in this context refers to the well-known Cushing's triad, which is a late sign.
Recall the three components of Cushing's triad: hypertension, bradycardia, and irregular respirations.
Evaluate the given options against these three components. Both hypertension and bradycardia are listed.
Recognize that while both are part of the triad, bradycardia is a paradoxical response to hypertension and is a very specific indicator, making it the best choice among the options.

Concept Tested & Keywords

Concept Tested: Signs of Increased Intracranial Pressure (ICP) and Cushing's Triad
Stem keywords: raised ICP, classical sign
Lead-in keywords: is
Negative lead-in flag: false

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E6 Nursing Brunner Adult Health 3SA Vol 2 Part 2 p. 30-32

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