— 生理適應 · EASY · MCQ —
教導 COPD 病人進行縮唇呼吸，目的是什麼？
A client with COPD is being taught about pursed-lip breathing. What is the goal?
- AIncrease the respiratory rate增加呼吸頻率
- BStrengthen the diaphragm muscle強化橫膈膜肌肉
- CIncrease the intake of oxygen增加氧氣攝取量
- DPromote CO2 elimination✓ 正解促進二氧化碳排出
— Explanation · 中文詳解 —
慢性阻塞性肺病（COPD）病人因肺泡彈性喪失，呼氣時氣道容易過早塌陷，導致空氣滯留（Air trapping）。縮唇呼吸的原理是透過縮唇呼氣產生正壓（Positive expiratory pressure），防止小氣道過早塌陷，延長吐氣時間，使肺部殘餘氣體更有效地排出。這能降低呼吸頻率，減少呼吸作功，改善氣體交換。
In chronic obstructive pulmonary disease (COPD), loss of alveolar elasticity causes the airways to collapse prematurely during exhalation, resulting in air trapping. Pursed-lip breathing works by creating positive expiratory pressure through pursed lips, preventing premature small-airway collapse and prolonging exhalation so that residual gas can be exhaled more effectively. This lowers respiratory rate, reduces the work of breathing, and improves gas exchange.