— 生理適應 · MEDIUM · MCQ —
下列何種徵象與低血容性休克的診斷一致？
Which of the following signs are consistent with a diagnosis of hypovolemic shock?
- ATachycardia and hypertension心搏過速和高血壓
- BBradycardia and hypertension心搏過緩和高血压
- CTachycardia and hypotension✓ 正解心搏過速和低血壓
- DBradycardia and hypotension心搏過緩和低血壓
— Explanation · 中文詳解 —
低血容性休克（Hypovolemic shock）是因為循環血量減少導致組織灌流不足。身體為了代償，交感神經系統會釋放兒茶酚胺，引起心跳加速（Tachycardia）以維持心輸出量，同時血管收縮。隨著血容量持續流失，代償機制失效，血壓即會下降（Hypotension）。此為典型的休克代償與失代償生理機轉。
Hypovolemic shock results from decreased circulating blood volume, triggering sympathetic nervous system activation to maintain cardiac output through tachycardia. As volume depletion persists, compensatory mechanisms fail, leading to hypotension, which characterizes the typical hemodynamic profile of this condition.