— 生理適應 · EASY · MCQ —
護理師指導 COPD 病人執行噘嘴式呼吸。此技巧的主要目的為何？
A client with COPD is being taught about pursed-lip breathing. What is the primary purpose of this technique?
- ATo prevent airway collapse during expiration✓ 正解防止呼氣時氣道塌陷
- BTo prevent deep vein thrombosis預防深層靜脈血栓
- CTo strengthen the diaphragm強化橫膈膜
- DTo increase oxygen intake增加氧氣攝取量
— Explanation · 中文詳解 —
COPD 病人的呼吸功能受損，肺部殘氣量增加。噘嘴式呼吸（Pursed-lip breathing）透過在呼氣時噘起嘴唇，增加呼氣阻力，從而維持呼吸道內壓力，防止小氣管在呼氣時過早塌陷（Airway collapse）。這能有效促進肺內氣體排出，減少殘氣量，並延長呼氣時間，使下一次吸氣更有效率。這是 COPD 病人改善呼吸效率的重要技巧。
In COPD, pursed-lip breathing creates back-pressure during exhalation, which keeps small airways open and prevents premature collapse. This promotes more complete exhalation, reduces air trapping, and lengthens expiratory time so the next inhalation is more effective.