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IBSC Tactical Paramedic Certification (TP-C) Practice Exam

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What is a common early physiologic sign of hypothermia?
Correct Answer:
Vasodilation
Explanation:
When the body is exposed to cold, the first instinct is to conserve heat by narrowing blood vessels in the skin (vasoconstriction). But you can also see a phenomenon called cold-induced vasodilation, or the hunting reaction, where the skin temporarily opens up and blood flow increases. These brief bursts of vasodilation can appear early as warm, flushed patches in exposed areas and are a recognizable early sign of hypothermia. That’s why this option is the best pick among the choices. Tachycardia can occur as a general compensatory response, fever cannot occur with hypothermia, and hypertension is not a typical early sign, whereas vasodilation specifically reflects that early, periodical increase in skin blood flow.

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