護理師照護一名疑似腦部受傷的病人。下列哪項是顱內壓 (ICP) 升高的最敏感指標？
The nurse is caring for a client with a suspected head injury. Which of the following is the most sensitive indicator of increased intracranial pressure (ICP)?
- ACushing's triad庫欣氏三聯徵
- BChanges in pupil size瞳孔大小的變化
- CProjectile vomiting噴射狀嘔吐
- DDecreased level of consciousness (LOC)✓ 正解意識程度（LOC）下降
顱內壓（Intracranial Pressure, ICP）升高是腦部受傷病人常見且危險的併發症，可能導致腦疝（herniation）和不可逆的腦損傷。護理師必須密切監測 ICP 升高的早期徵象，以便及時介入。 意識程度（Level of Consciousness, LOC）的改變是評估 ICP 升高最早期、最敏感且最重要的指標。這是因為大腦皮質和腦幹網狀活化系統對壓力和灌流改變非常敏感。即使是輕微的 ICP 升高，也可能表現為病人變得煩躁不安、嗜睡、定向力變差或反應遲鈍。 臨床思路強調早期發現與預防，因此最敏感的指標能提供最及時的警訊，讓醫療團隊能夠在其他更嚴重、更不可逆的徵象出現之前進行干預。
A decreased level of consciousness is the earliest and most sensitive indicator of increased intracranial pressure because the brain's reticular activating system is highly responsive to changes in perfusion and pressure. While Cushing's triad and pupillary changes are significant, they typically represent late-stage deterioration. Early detection of altered LOC allows for timely interventions to prevent irreversible brain damage.