The physician ordered 100 units of regular insulin in 250 mL of NS. It is to infuse at 8 units/hour per infusion pump. What is the correct IV rate in milliliters per hour? Round to the nearest whole number.
A) 16
B) 18
C) 20
D) 22

Question

Quizplus · Accepted Answer

When solving any problem, first check that the order and the supply are in the same weight measure. For this problem, no equivalent is necessary. Estimate the amount to give. Round to the nearest whole number. Formula Method: 8 units/100 units *250 mL = 20 mL/hour. Proportion (Ratios): 250 mL : 100 units :: x mL : 8 units; 100x = 2000/100 = 20 mL/hour. Proportion (Fractions): 250 mL/100 units = 20 mL/8 units; 100x = 250 mL *8/100 hours = 2000/100 = 20 mL/hour. Dimensional Analysis: 250 mL/100 units * 8 units/1 hour = 2000 mL/100 hours = 20 mL/hour.

The Physician Ordered 100 Units of Regular Insulin in 250