哪項徵象是顱內壓（ICP）升高的晚期典型臨床表現？

庫欣氏三徵象（Cushing's triad）是顱內壓（ICP）持續升高、腦組織受壓迫並瀕臨腦疝（Herniation）的晚期危險信號。其典型表現為：收縮壓升高（伴隨脈壓差增大）、心搏過緩（Bradycardia）以及呼吸型態異常（如陳施氏呼吸 Cheyne-Stokes respiration）。這是因為顱內高壓刺激腦幹血管中樞所導致的生理代償反應。此時病人狀況極為危急，需立即採取降腦壓措施並通知醫師。

Cushing's triad is a late, ominous sign of sustained increased intracranial pressure (ICP) with brainstem compression and impending herniation. Its classic presentation includes elevated systolic blood pressure with widened pulse pressure, bradycardia, and abnormal respiratory patterns (such as Cheyne-Stokes respiration). This is the result of a physiologic compensatory reflex from brainstem vasomotor compression. The client is in critical condition, requiring immediate measures to lower ICP and notification of the physician.