一位有靜脈血栓栓塞病史的病人被處方使用 Warfarin。護理師應指導病人每日應穩定攝取哪類食物？
A client with a history of venous thromboembolism is prescribed warfarin. Which food should the nurse instruct the client to consume consistently each day?
- AGrapefruit and orange juice葡萄柚和柳橙汁
- BRed meats and organ meats紅肉和內臟
- CSpinach and kale✓ 正解菠菜和羽衣甘藍
- DWhole grain breads and cereals全麥麵包和穀物
Warfarin 的作用機轉是維生素 K 拮抗劑。衛教的核心並非「完全禁止」攝取維生素 K，而是「維持穩定的攝取量（Consistency）」。菠菜和羽衣甘藍富含維生素 K，若病人某日攝取量突然大增，會抵消 Warfarin 的抗凝血效果，導致 INR 下降與血栓風險；反之若突然不吃，INR 可能飆升造成出血。為何不選紅肉或葡萄柚？因為它們對 Warfarin 的凝血機制影響不如維生素 K 直接。護理思路在於透過飲食一致性來協助藥物濃度管理，避免 INR 劇烈波動。這題考驗的是病人自我管理能力與藥食交互作用的基本概念。
Warfarin's mechanism is as a vitamin K antagonist. The core of education is not to 'completely prohibit' vitamin K intake but to 'maintain consistent intake.' Spinach and kale are rich in vitamin K; if intake suddenly increases on a given day, it will counteract warfarin's anticoagulant effect, lowering INR and increasing thrombosis risk; conversely, sudden cessation may cause INR to spike, leading to bleeding. Why not red meat or grapefruit? Their impact on warfarin's coagulation mechanism is not as direct as that of vitamin K. The nursing reasoning is to help manage drug levels through dietary consistency, avoiding sharp INR fluctuations. This question tests the patient's self-management ability and basic understanding of food-drug interactions.
美國護理衛教強調病人維持「一致的飲食習慣」而非「禁止」，並提供詳細的食物清單；台灣臨床衛教有時會簡化為「少吃綠色蔬菜」，這可能導致病人營養不均或 INR 控制困難。