The order is for 0.45% NaCl IV for 90 mL/h for 4 hours. The drop factor is 10 gtt/mL. What is the total volume?

The order is for 0.45% NaCl IV for 90 mL/h for 4 hours. The drop factor is 10 gtt/mL. What is the total volume?

• A. 300 mL
• B. 360 mL
• C. 420 mL
• D. 480 mL

Answer: (B)

Volume to infuse is found by multiplying the rate by the time: 90 mL per hour for 4 hours equals 90 × 4 = 360 mL. So the total volume is 360 mL. The drop factor (10 gtt/mL) would matter if you needed to convert this into drops per minute to set the IV rate, but it doesn't change the total volume itself.

Volume to infuse is found by multiplying the rate by the time: 90 mL per hour for 4 hours equals 90 × 4 = 360 mL. So the total volume is 360 mL. The drop factor (10 gtt/mL) would matter if you needed to convert this into drops per minute to set the IV rate, but it doesn't change the total volume itself.