Nursing math question?

Question

30,000 units of Heparin are added to 150cc of NS. The order is to infuse at 1,800 units per hour. Drop factor is 60. How many gtts/min?

Answer 1

30000/150 = 200 units per ml.

1800/200 = 9 ml per hour

9 x 60 gtts/ml = 540 gtts/hr.

540 gtts/hr / 60 min = 9 gtts/min.  Nice thing about microdrops.

In reality you would use a pump, but you still need to know the math.