The order is for Lactated Ringer's 1000 mL at 100 mL/h. The drop factor is 10 gtt/mL. What is the infusion time in hours?

The order is for Lactated Ringer's 1000 mL at 100 mL/h. The drop factor is 10 gtt/mL. What is the infusion time in hours?

• A. 10 hrs
• B. 8 hrs
• C. 9 hrs
• D. 12 hrs

Answer: (A)

Infusion time is found by dividing the total volume by the infusion rate when the rate is given in mL per hour. Here, 1000 mL at 100 mL/h means 1000 ÷ 100 = 10 hours. The drop factor (10 gtt/mL) isn’t needed for this calculation since the rate is already in mL/h. If you did need drops per minute, you’d convert the time to minutes and use the drop factor, but that isn’t required to determine the time. So, the infusion time is 10 hours.

Infusion time is found by dividing the total volume by the infusion rate when the rate is given in mL per hour. Here, 1000 mL at 100 mL/h means 1000 ÷ 100 = 10 hours. The drop factor (10 gtt/mL) isn’t needed for this calculation since the rate is already in mL/h. If you did need drops per minute, you’d convert the time to minutes and use the drop factor, but that isn’t required to determine the time. So, the infusion time is 10 hours.