護理師照護一位血鉀濃度 6.2 mEq/L 的病人，應準備給予何種藥物？
A nurse is caring for a client with a potassium level of 6.2 mEq/L. Which medication should the nurse prepare to administer?
- APotassium chloride氯化鉀
- BSpironolactone螺內酯
- CFurosemide呋塞米
- DSodium polystyrene sulfonate✓ 正解聚苯乙烯磺酸鈉
高血鉀症（6.2 mEq/L）具危險性，Sodium polystyrene sulfonate (Kayexalate) 是一種陽離子交換樹脂，能與腸道內的鉀離子結合並經糞便排出，是降低體內血鉀的有效方式。Spironolactone 是保鉀利尿劑，禁用；KCl 會加重病情；Furosemide 雖可排鉀，但對於嚴重高血鉀，Kayexalate 優先級或協同使用更常見。
Hyperkalemia (6.2 mEq/L) is dangerous. Sodium polystyrene sulfonate (Kayexalate) is a cation-exchange resin that binds potassium in the gut and is excreted in the stool, providing an effective means of reducing serum potassium. Spironolactone is a potassium-sparing diuretic and is contraindicated; KCl would worsen the condition; and although furosemide also removes potassium, for severe hyperkalemia Kayexalate is more often used preferentially or in combination.
台灣醫院多使用離子交換樹脂，但給予方式需注意水分攝取以防便秘，美國護理師常需執行衛教並監測糞便頻率。