— 生理適應 · HARD · MCQ —
下列哪項評估最能代表周邊灌流受損？
Which of the following assessments is most indicative of peripheral perfusion compromise?
- APulse strength of +2+2 的脈搏強度
- BWarmth of extremities四肢溫暖
- CSkin temperature of 36.5°C皮膚溫度 36.5°C
- DCapillary refill time of 5 seconds✓ 正解毛細血管再充盈時間 5 秒
— Explanation · 中文詳解 —
微血管充填時間（Capillary refill time, CRT）是評估末梢灌流狀況的快速指標。正常情況下，按壓指甲床後，血液回流應在 2-3 秒內完成。若超過 3 秒，代表組織灌流不足。5 秒的充填時間明顯過長，嚴重暗示周邊循環受損或組織缺氧。其他選項如 36.5°C 體溫正常、+2 脈搏強度正常、四肢溫暖皆為正常的生理表現。
Capillary refill time (CRT) is a quick indicator for assessing peripheral perfusion. Normally, after pressing the nail bed, blood return should occur within 2-3 seconds. A CRT longer than 3 seconds represents inadequate tissue perfusion. A 5-second refill time is markedly prolonged and strongly suggests compromised peripheral circulation or tissue hypoxia. The other options—36.5°C body temperature, +2 pulse strength, and warm extremities—are all normal physiologic findings.