问题
单项选择题
The physician orders IV fluid volume replacement with lactated Ringer's solution at a rate of 75 mL/hour. Using an infusion set that provides 15 gtt/mL, the nurse should calculate the flow rate to be （）.
A．10 gtt/min.
B．12 gtt/min.
C．19 gtt/min.
D．75 gtt/min.
答案
参考答案：C
解析：
The equation used to calculate the flow rate is: drops/minute= volume (in milliliters)×drip factor (drops/milliliter)/time (in minutes). So, the calculation is: 75mL ×15gtt/mL/60 minutes=18.75 gtt/minute=19 gtt/minute.