问题
单项选择题
The nurse administers racemic epinephrine to a child. Ten minutes after administration, the nurse should be alert for（）
A. respiratory distress.
B. profound tachycardia.
C. signs of improved oxygenation.
D. diminished cyanosis.
答案
参考答案：A
解析：
A rebound effect from racemic epinephrine can occur up to 4 hours after treatment with signs of respiratory distress (tachypnea, restlessness, cyanosis). Tachycardia may initially follow treatment with racemic epinephrine as well as improvement in client status (improved oxygenation and improved color).