— 降低風險 · EASY · MCQ —
一位慢性阻塞性肺病（COPD）病人，下列何種氧氣流量最安全？
A nurse is caring for a client with a history of COPD. Which oxygen flow rate is safest?
- AOxygen is contraindicated氧氣為禁忌
- B10-15 L/min via non-rebreather mask透過非再呼吸面罩以10-15 L/min給氧
- C1-2 L/min via nasal cannula✓ 正解透過鼻導管以1-2 L/min給氧
- D4-6 L/min via nasal cannula透過鼻導管以4-6 L/min給氧
— Explanation · 中文詳解 —
COPD 病人長期處於高二氧化碳分壓狀態，其呼吸驅動機制已從「二氧化碳驅動」改為「缺氧驅動（Hypoxic drive）」。若給予高流量氧氣，會使病人血氧分壓過高，從而抑制呼吸中樞，導致呼吸衰竭。因此，COPD 病人應給予低流量氧氣（1-2 L/min），維持血氧飽和度（SpO2）在 88-92% 之間即可。
Patients with COPD often rely on a hypoxic drive to stimulate breathing due to chronically elevated carbon dioxide levels. Administering high-flow oxygen can suppress this drive and lead to respiratory depression, making low-flow oxygen (1-2 L/min) the safest option to maintain adequate saturation without compromising respiratory effort.