The physician orders D5LR at 75 mL/hour for 8 hours. The drop factor is 10 gtt/mL. What is the total volume to be infused?

The physician orders D5LR at 75 mL/hour for 8 hours. The drop factor is 10 gtt/mL. What is the total volume to be infused?

• A. 500 mL
• B. 600 mL
• C. 700 mL
• D. 800 mL

Answer: (B)

Total volume is found by multiplying the infusion rate by the time. 75 mL per hour for 8 hours equals 75 × 8 = 600 mL. The drop factor isn’t needed to determine this total. If you later needed the drops per minute, you’d convert to mL per minute and multiply by the drop factor (600 mL over 8 hours is 1.25 mL/min, which with 10 gtt/mL becomes 12.5 gtt/min).

Total volume is found by multiplying the infusion rate by the time. 75 mL per hour for 8 hours equals 75 × 8 = 600 mL. The drop factor isn’t needed to determine this total. If you later needed the drops per minute, you’d convert to mL per minute and multiply by the drop factor (600 mL over 8 hours is 1.25 mL/min, which with 10 gtt/mL becomes 12.5 gtt/min).