Question

Calculate the flow rate in mL/h for each IV infusion order.

1. Order: Infuse 1,000 mL D₅ ½ NS over 8 hours.
2. Order: Infuse 1,000 mL NS over 4 hours.
3. Order: Infuse 1.5 L over 15 hours.
4. Order: Infuse 2 L over 24 hours.
5. Order: Infuse cefazolin in 100 mL NS over 40 minutes via infusion pump.

Answer 1

Ans) Formula:

Rate (ml/hr) = Total volume to be infused (ml)× drop factor ÷ Time (hr)

Order: Infuse 1,000 mL D5 ½ NS over 8 hours

= 1000 ÷ 8 = 125 ml/hr.

Order: Infuse 1,000 mL NS over 4 hours.

= 1000 ÷ 4 = 250ml/hr

Order: Infuse 1.5 L over 15 hours.

1.5 l = 1500 ml

1500 ÷ 15 = 100 ml/hr.

Order: Infuse 2 L over 24 hours.

2 L = 2000 ml

= 2000 ÷ 24 = 83.33 ml/hr

Order: Infuse cefazolin in 100 mL NS over 40 minutes via infusion pump

40 minutes = 0.667 hour

100 ÷ 0.667 = 149.92 ml/hr.