— 藥理與非經腸給藥 · HARD · MCQ —
一位子癇前症病人正輸注硫酸鎂（magnesium sulfate），哪項評估結果需要護理師立即停止輸注？
A patient is receiving an infusion of magnesium sulfate for preeclampsia. Which assessment finding requires the nurse to immediately stop the infusion?
- AAbsent patellar deep tendon reflexes✓ 正解膝腱反射消失
- BSerum magnesium level of 4.5 mg/dL血清鎂濃度4.5 mg/dL
- CBlood pressure 140/90 mmHg血壓140/90 mmHg
- DRespiratory rate of 14 breaths/min呼吸頻率14次/分
— Explanation · 中文詳解 —
硫酸鎂（Magnesium sulfate）治療子癇前症時，治療窗窄，易發生鎂中毒。鎂中毒的首要臨床徵象是深層肌腱反射（DTRs）消失（特別是膝反射），接著是呼吸抑制。一旦發現 DTRs 消失，表示血鎂已達危險濃度，必須立即停止輸注，並準備鈣離子拮抗劑（Calcium gluconate）作為解毒劑。
Absent deep tendon reflexes are an early sign of magnesium toxicity, indicating dangerously high serum levels. The infusion must be stopped immediately to prevent progression to respiratory depression, and calcium gluconate should be prepared as an antidote.