護理師教導病人使用定量吸入器（MDI）。哪項動作顯示技術正確？
A nurse is teaching a client about using a metered-dose inhaler (MDI). Which action indicates correct technique?
- AExhale fully before pressing the inhaler✓ 正解按壓吸入器前先完全呼氣
- BShake the inhaler only after using it僅在使用後搖晃吸入器
- CInhale as quickly as possible upon pressing按壓時盡可能快速吸氣
- DRinse the mouth only if using a steroid inhaler僅在使用類固醇吸入器後漱口
定量吸入器（MDI）的使用核心在於藥物霧滴能有效進入下呼吸道。正確步驟包括：先搖晃藥瓶以混合藥液，接著請病人深吐氣以清空肺部餘氣，增加吸入空間。按壓時需同步緩慢深吸，確保藥物隨氣流沉降至支氣管。吸入後需閉氣 5-10 秒，讓藥物沉降於肺泡，最後緩慢吐氣。若吸氣過快，藥物容易撞擊咽喉壁而沉澱，降低療效。
The key to effective use of a metered-dose inhaler (MDI) is that the medication aerosol reaches the lower airways. The correct steps include first shaking the canister to mix the drug, then asking the client to exhale fully to empty the lungs and create more inspiratory space. The client should press the canister while slowly and deeply inhaling, ensuring that the medication is carried by the airflow down into the bronchi. After inhaling, the client should hold the breath for 5-10 seconds to allow the medication to deposit in the alveoli, and then exhale slowly. Inhaling too quickly causes the medication to impact and deposit on the pharyngeal wall, reducing therapeutic effect.