A boy is to be given dextrose 5% via an infusion pump. If the pump is set at 60 mL/h, how much dextrose will he receive in 2.5 hours?

A boy is to be given dextrose 5% via an infusion pump. If the pump is set at 60 mL/h, how much dextrose will he receive in 2.5 hours?

• A. 120 mL
• B. 180 mL
• C. 150 mL
• D. 210 mL

Answer: (C)

The main idea is that infusion rate multiplied by time gives the total volume delivered. The pump is delivering 60 mL each hour, and the time is 2.5 hours, so the total volume is 60 × 2.5 = 150 mL. Therefore, the boy will receive 150 mL of the dextrose solution. Since the solution is 5% dextrose, that 150 mL contains about 7.5 g of dextrose (but the question focuses on the volume delivered, which is 150 mL). Quick checks: in 2 hours you’d have 120 mL, in 3 hours 180 mL, so 2.5 hours sits in between at 150 mL.

The main idea is that infusion rate multiplied by time gives the total volume delivered. The pump is delivering 60 mL each hour, and the time is 2.5 hours, so the total volume is 60 × 2.5 = 150 mL. Therefore, the boy will receive 150 mL of the dextrose solution. Since the solution is 5% dextrose, that 150 mL contains about 7.5 g of dextrose (but the question focuses on the volume delivered, which is 150 mL). Quick checks: in 2 hours you’d have 120 mL, in 3 hours 180 mL, so 2.5 hours sits in between at 150 mL.