護理師為開始接受華法林（warfarin）治療的病人進行出院衛教。病人的哪項描述顯示需要進一步的指導？
The nurse provides discharge teaching to a client starting warfarin therapy. Which statement by the client indicates a need for further instruction?
- AI will wear an identification bracelet stating I take warfarin我會佩戴標示服用華法林的識別手鍊
- BI will use a soft-bristled toothbrush to brush my teeth我會使用軟毛牙刷刷牙
- CI will increase my intake of spinach and kale to stay healthy✓ 正解我會增加菠菜和羽衣甘藍的攝取量以保持健康
- DI will report any dark, tarry stools to my doctor immediately我會立即向醫師報告任何黑色、柏油樣糞便
華法林衛教的核心在於「維持維生素 K 攝取的穩定性」。華法林是維生素 K 的拮抗劑，透過抑制其循環來發揮抗凝血作用。如果病人大幅增加深綠色蔬菜（如菠菜、羽衣甘藍）的攝取量（C），體內維生素 K 含量上升會直接抵消華法林的藥效，導致 INR 下降，增加血栓風險。正確的衛教不是「禁止」攝取，而是「維持固定量」。選項 B（軟毛牙刷）與 D（解黑便回報）都是為了降低出血風險或早期偵測出血；選項 A 則是安全通訊的重要部分。這題考的是護理師如何透過辨識錯誤觀念來降低病人的用藥風險。
The core of warfarin teaching is to "maintain a consistent intake of vitamin K." Warfarin is a vitamin K antagonist that exerts its anticoagulant effect by inhibiting vitamin K circulation. If the client substantially increases intake of dark green vegetables (such as spinach and kale) (C), the rise in vitamin K levels will directly counteract warfarin's effect, lowering the INR and increasing the risk of thrombosis. Correct teaching is not to "prohibit" intake but to "maintain a stable amount." Option B (soft-bristled toothbrush) and option D (reporting black, tarry stools) are aimed at reducing bleeding risk or detecting bleeding early; option A is an important safety/communication measure. This question assesses how the nurse can reduce the client's medication risk by identifying misconceptions.
美國非常強調病人自我管理與 INR 診門診的配合，藥劑師在衛教中角色吃重；台灣則多由門診護理師或醫師在診間快速衛教，病人常因不清楚「維持恆定」與「完全不吃」的差異而導致藥效波動。