medication is to be dissolved in 50 ml of I.V. fluid and the

recommended administration time is 15 minutes. Using a

drop factor of 20 gtts/ml, determine the infusion rate.

50 ml x 20 gtts/ml

15

1000 = 67 gtts/min.

15

With continuous I.V. infusions of medications, the physician will order a

medication dosage and not fluid volume. For example, the order may specify

mg/hr or units/hr.

The order is to administer a continuous I.V. Heparin drip at a

rate of 1200 units per hour. The pharmacy sends up a 250 ml

bag of Normal Saline with 25,000 units of Heparin added. Using

a drop factor of 60 gtts/ml, determine the infusion rate to deliver

the ordered amount of medication.

a. Determine the amount of drug in the solution.

25,000 units

250 ml

b. Determine the number of ml/hr to be administered to give the ordered

dosage.

25,000 units = 1200 units

250 ml

X ml

25,000 X = 300,000

X = 12 ml/hr

c. Determine the infusion rate in gtts/min.

12 ml x 60 gtts/ml

60

720 = 12 gtts/min

60

MD0904

2-58