Below are the answers to the problems on the previous page.

1. Give Heparin 500 units IV per hour. The IV solution contains 20,000 units per 1000 ml D5W. A micro drip set is to be used (60 gtts/ml).
   
   

   A.	First - determine how much solution to give per hour by setting up a proportion
   	If	20,000 units	Then	500 units
   		1,000 ml		x ml
   			20,000 x = 500,000
   			500,000 ÷ 20,000 = 25 ml

   
   
   

   B.	Now - calculate the IV drip rate using the same formula as before. (Remember the IV set delivers 60 gtts/ml)
   	25 ml	X	60 gtts/ml	=	25 gtts/minute
   	60 minutes

   
   Give 1,000,000 units of Ampicillin IV in 2 hours. The drug comes from the pharmacy with 5,000,000 units in 1000ml D5W. A 15 drop IV set is to be used.
   
   

   A.	First - determine how much solution to give per hour by setting up a proportion
   	If	5,000,000 units	Then	1,000,000 units
   		1,000 ml		x ml
   		5,000,000 x = 10,000,000,000
   		5,000,000 ÷ 10,000,000,000 = 200 ml

   
   
   

   B.	Now - calculate the IV drip rate using the same formula as before. (A 15 gtts/ml IV set is being used.)
   	200 ml	X	15 gtts/ml
   	120 minutes
   	3,000 ÷ 120 = 25 gtts/minute

   
   
   
2. Give 40 mEq of potassium chloride IV over 8 hours. The solution available contains 80 mEq in 1000 ml of D5W. The IV set delivers 10 gtts/ml.
   
   
   

   A.	First - determine how much solution to give per hour by setting up a proportion
   	If	80 MEq	Then	40 MEq
   		1,000 ml		x ml
   			80 x = 40,000
   			40,000 ÷ 80 = 500 ml

   
   
   

   B.	Now - calculate the IV drip rate using the same formula as before. (A 15 gtts/ml IV set is being used.)
   	500 ml	X	10 gtts/ml
   	480 minutes
   	5,000 ÷ 480 = 10.41 or 10 gtts/minute
   	(the fraction is not rounded up)