Infuse 2 litres over 8 hours. What is the flow rate in mL/h?

Infuse 2 litres over 8 hours. What is the flow rate in mL/h?

• A. 250 mL/h
• B. 260 mL/h
• C. 240 mL/h
• D. 230 mL/h

Answer: (A)

Flow rate is the amount of fluid delivered per unit time. To find it in mL per hour, convert the volume to millilitres and divide by the time in hours. 2 litres equals 2000 millilitres, and over 8 hours that’s 2000 ÷ 8 = 250 mL/h. So the infusion rate is 250 millilitres per hour. If you kept litres, you’d get 0.25 L/h, which is the same as 250 mL/h since 1 L = 1000 mL.

Flow rate is the amount of fluid delivered per unit time. To find it in mL per hour, convert the volume to millilitres and divide by the time in hours. 2 litres equals 2000 millilitres, and over 8 hours that’s 2000 ÷ 8 = 250 mL/h. So the infusion rate is 250 millilitres per hour. If you kept litres, you’d get 0.25 L/h, which is the same as 250 mL/h since 1 L = 1000 mL.