The order is for D5 Lactated Ringer's 800 mL at 125 mL/h. The drop factor is 15 gtt/mL. Calculate the infusion time in hours and minutes.

The order is for D5 Lactated Ringer's 800 mL at 125 mL/h. The drop factor is 15 gtt/mL. Calculate the infusion time in hours and minutes.

• A. 5 h 12 min
• B. 6 h 24 min
• C. 7 h 8 min
• D. 6 h 0 min

Answer: (B)

When the infusion rate is given in mL per hour, find the time by dividing the total volume by the rate: 800 mL ÷ 125 mL/h = 6.4 hours. The .4 hour equals 0.4 × 60 = 24 minutes, so the infusion takes 6 hours and 24 minutes. The drop factor is only needed if you’re converting to drops per minute; here it doesn’t affect the time since the rate is already in mL/h.

When the infusion rate is given in mL per hour, find the time by dividing the total volume by the rate: 800 mL ÷ 125 mL/h = 6.4 hours. The .4 hour equals 0.4 × 60 = 24 minutes, so the infusion takes 6 hours and 24 minutes. The drop factor is only needed if you’re converting to drops per minute; here it doesn’t affect the time since the rate is already in mL/h.