— 生理適應 · EASY · MCQ —
一位慢性阻塞性肺病(COPD)病人需要氧氣治療。下列哪種氧氣流速對此病人最安全?
A client with chronic obstructive pulmonary disease (COPD) requires oxygen therapy. Which flow rate is safest for this client?
- A5-6 L/min5-6 L/min(語境:高流量氧氣會導致二氧化碳積聚,引起呼吸衰竭。)
- B12-15 L/min12-15 L/min(語境:此流量過大,極可能導致病人呼吸停止。)
- C1-2 L/min✓ 正解1-2 L/min(語境:低流量可改善缺氧,同時不至於完全抑制其呼吸驅動力。)
- D8-10 L/min8-10 L/min(語境:高流量氧氣會導致呼吸抑制,對 COPD 病人較危險。)
— Explanation · 中文詳解 —
COPD 病人長期處於高二氧化碳分壓狀態,其呼吸驅動力轉變為對低氧氣血症的反應(hypoxic drive)。若給予高流量氧氣,會抑制其呼吸中樞,導致呼吸抑制。因此應使用低流量(1-2 L/min)氧氣。
Clients with chronic obstructive pulmonary disease (COPD) often rely on hypoxic drive to stimulate breathing due to chronically elevated carbon dioxide levels. Administering high-flow oxygen can suppress this drive, leading to respiratory depression and hypercapnia. Therefore, low-flow oxygen (1-2 L/min) is the safest approach to maintain adequate oxygenation without compromising respiratory effort.
✦ 台美臨床差異
無明顯差異,皆嚴格遵守 COPD 病人低氧驅動機轉原則。