The physician ordered Lasix (furosemide) 100 mg in 250 mL of D5W. It is to infuse at 6 mg/hour per infusion pump. How many hours will the IV run? Round to the nearest hour.
A) 17
B) 4
C) 8
D) 10

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. This is a two-part problem. First, calculate milliliters per hour, then calculate the number of hours using this formula: Number of milliliters/Number of milliliters per hour = Hours. Estimate the amount to give. Formula Method: 6 mg/100 mg × 250 mL = 1,500/100 = 15 mL/hour. Proportion (Ratios): 250 mL : 100 mg :: x mL : 6 mg; 100x = 1,500/100 = 15 mL/hour. Proportion (Fractions): 250 mL/100 mg = x mL/6 mg; 100x =1,500/100 = 15 mL/hour. Dimensional Analysis: 250 mL/100 mg × 6 mg/1 hour = 250 mL × 6/100 × 1 hour = 1500/100 = 15 mL/hour. Now calculate the number of hours. Number of milliliters/Number of milliliters per hour = Hours. Therefore, 250 mL/15 mL/hour = 16.67 hours. Round to the nearest hour: 17 hours.

The Physician Ordered Lasix (Furosemide) 100 Mg in 250 ML