A patient needs to infuse 250 mL over 6 hours. What is the infusion rate in mL/hr?

A patient needs to infuse 250 mL over 6 hours. What is the infusion rate in mL/hr?

• A. 41.7 mL/hr
• B. 40 mL/hr
• C. 50 mL/hr
• D. 30 mL/hr

Answer: (A)

Infusion rate is the volume to be infused divided by the time over which it should be infused. So for 250 mL over 6 hours, you divide 250 by 6 to get 41.666... mL per hour. Rounded to one decimal place, that’s 41.7 mL/hr. This matches the idea that a rate of 40 mL/hr would deliver 240 mL in 6 hours, 50 mL/hr would deliver 300 mL in 6 hours, and 30 mL/hr would deliver 180 mL in 6 hours. The calculation shows the precise rate needed to deliver 250 mL in 6 hours is 41.7 mL/hr.

Infusion rate is the volume to be infused divided by the time over which it should be infused. So for 250 mL over 6 hours, you divide 250 by 6 to get 41.666... mL per hour. Rounded to one decimal place, that’s 41.7 mL/hr.

This matches the idea that a rate of 40 mL/hr would deliver 240 mL in 6 hours, 50 mL/hr would deliver 300 mL in 6 hours, and 30 mL/hr would deliver 180 mL in 6 hours. The calculation shows the precise rate needed to deliver 250 mL in 6 hours is 41.7 mL/hr.