A patient is receiving dextrose 5% at a rate of 55 mL/h. How much fluid will he receive in 5 hours?

A patient is receiving dextrose 5% at a rate of 55 mL/h. How much fluid will he receive in 5 hours?

• A. 270 mL
• B. 275 mL
• C. 285 mL
• D. 260 mL

Answer: (B)

Total fluid delivered comes from multiplying the infusion rate by the duration. With a rate of 55 mL per hour for 5 hours, the amount = 55 × 5 = 275 mL. So the patient will receive 275 mL in 5 hours. This also checks out because 275 mL ÷ 5 hours = 55 mL per hour, matching the given rate. The other numbers would require a different time (or rate) to reach them, so they don’t fit with the stated rate and time.

Total fluid delivered comes from multiplying the infusion rate by the duration. With a rate of 55 mL per hour for 5 hours, the amount = 55 × 5 = 275 mL. So the patient will receive 275 mL in 5 hours. This also checks out because 275 mL ÷ 5 hours = 55 mL per hour, matching the given rate. The other numbers would require a different time (or rate) to reach them, so they don’t fit with the stated rate and time.