Question

A. The low molecular weight heparin Lovenox is dosed 1 mg/kg to treat a person for deep vein thrombosis. It is supplied 100 mg/ml. How many ml will be given to a 176 pound person ? ____  

B. A 100ml saline solution containing 5mg of metoprolol is given over 15 minutes for hypertension when the person is NPO. At what rate is the pump set in ml per hour? ____

C. Pharmacy has prepared a solution of 50 units of regular insulin in 100 ml of normal saline. The order is to give insulin by continuous infusion at 9 units per hour. At how many ml per hour should you set the pump to infuse the insulin?

D. Drug G comes from the pharmacy as 40mg/5cc. How many milliliters will you give to deliver 12 mg of drug?_____

E. Dopamine comes prepared as 400mg in 250 ml D5W bags (1600 mcg/ml). You have been ordered to deliver 20 mcg/kg/min to a hypotensive ICU patient who weighs 76 kg (167.2 lbs). You use IV tubing with a drip factor of 60, meaning every 60 drops is equal to 1 milliliter (60 gtts/ml). How many drops per minute will you deliver the Dopamine?

F. Dopamine comes prepared as 400mg in 250 ml D5W bags (1600 mcg/ml). You have been ordered to deliver 20 mcg/kg/min to a hypotensive ICU patient who weighs 76 kg (167.2 lbs). You use IV tubing with a drip factor of 60, meaning every 60 drops is equal to 1 milliliter (60 gtts/ml). How many drops per minute will you deliver the Dopamine?

G. The pharmacy has prepared a solution of 100mg of Drug D in 250 ml of normal saline. At what rate should you set the pump in ml per hour to infuse 12mg of Drug D per hour?_____

H. Mr. Z is to receive Drug I dosed 0.35 mg/kg by IM injection. Mr Z weighs 154 lbs. How many milligrams will you administer?

I. An IV with 8mg of Drug T in 100ml of solution is run at 20 ml/hr. How many milligrams of drug will be delivered after 30 minutes?____

Answer 1

A.

Low molecular weight heparin is to be given 1 mg/kg. Weight of person is 176 pounds which will be equal to approximately 80 kgs. (1pound = 0.45kg) Available heparin is 100mg/ml. Therefore we have to give 0.8 ml low molecular weight heparin to person to fulfill his 80 mg dose.

B.

100ml containing 5 mg metoprolol is given over 15 mins. We need to calculate flow rate kf of pump in ml per hour. Each hour has 60 mins. In 15 mins, 100 ml solution is to be given. Then in one hour (60 mins), taking cross product,

60÷15×100 = 400 ml.

Therefore, flow rate should be 400 ml per hour.

C.

Prepared solution has 50 units of regular insulin in 100 ml of normal saline. According to the order, we have to give 9 units of regular insulin per hour. Now, 50 units of regular insulin are present in 100ml of normal saline, then 9 units of regular insulin will be present in, taking cross product ratio,

50÷100×9= 18

Therefore 18 ml per hour should be the flow rate to be set on the infusion pump.

D.

Available concentration of the drug G is 40mg/5cc that is 40 mg /5ml. That means each ml of drug will have 8 mg. We have to deliver 12 mg of drug. For that, by taking cross product ratio,

12÷8= 1.5.

Therefore 1.5 ml will deliver 12 milligrams of drug.