please look over my dosage answers

[np2329]

Hello, I was hoping someone would assist me by reviewing my math dosage answers. My teacher has not provided the answers to the problems and I'm not sure if I did them correctly.

1. The nurse has received an order to administer a pain medication to a client with heart failure. The client is to receive 6 mg of medication per kg of body weight. He weighs 143 pounds. The medication is available in 200mg per ml. How many ml will the nurse administer to the client? (143/2.2) 65kg x 6 mg = 390mg/200mg = 1.95 = 2ml

2. The physician ordered Dopamine 30 mcg/kg/min. The client weighs 176 pounds. The pharmacy sends a Dopamine drip of 500 mg in 250 ml of D5W. The drop factor is 60 drops per ml.What is the infusion rate in drops per minute? 30 mcg = 0.03 mg x 80 kg =2.4 mg/min. 2.4/500 mg x 250ml= 1.2 ml/.60 x 60 = 120 drop per min

3. The physician has ordered a client to receive Heparin 1200 units/hr. The pharmacy has sent 25.000 units of Heparin in 250 ml of NS. What is the flow rate in ml/hr? 1200u/25000u x 250ml =12ml/hr

4. A client has an insulin drip of 300 units in 500ml of Normal Saline that is infusing at 12.5 ml/hr. How many units of insulin is the client receiving per hour?

300u x 12.5ml/500ml = 7.5 units per hour

5. A client is to receive Zithromycin 500 mg. The pharmacy sends Zithromycin in 250 ml of D5W and the instructions say to infuse over 90 minutes. At what rate will the nurse set the IV infusion pump?

250ml /1.5hr = 167 ml/hr

6. The nurse must administer 1200 ml of Normal Saline over 10 hours. The drop factor is 20 drops per ml. At what rate will the nurse set the infusion pump in drops per minute? 1200ml / 600 min x 20 = 40 drops per min

[Leonardsmom,LPN]

Everything except number 2 looks good to me, set them up using dimensional anaylysis and got the same answers that you did. On the second problem where did you get the .6 from? The way I set the problem up is as follows: 60ggts/1 mL x 250mL/500mg x 1mg/1000mcg x 30mcg/kg/min x 176lb x 1kg/2.2lb. All units except ggt and minutes will cancel out. Doing the math get 72ggts/min

[nurseprnRN, BSN, RN]

("Drop" is gtt, not "ggt." From the Latin, "guttae," drops.)

[KelRN215, BSN, RN]

2. The physician ordered Dopamine 30 mcg/kg/min. The client weighs 176 pounds. The pharmacy sends a Dopamine drip of 500 mg in 250 ml of D5W. The drop factor is 60 drops per ml.What is the infusion rate in drops per minute? 30 mcg = 0.03 mg x 80 kg =2.4 mg/min. 2.4/500 mg x 250ml= 1.2 ml/.60 x 60 = 120 drop per min

Ok, you are correct that 176 lb = 80 kg and I agree with the dose/min. You want to give 2.4 mg/min x 250 mL/500 mg = 1.2 mL/min. 60 gtts/mL x 1.2 mL/min leaves you with 72 gtts/min. I'm not sure why you would divide 1.2/0.6.

[Leonardsmom,LPN]

("Drop" is gtt, not "ggt." From the Latin, "guttae," drops.)

Oops... Thanks Grntea for correcting that, posted it last night at about 2:30 after a long day of school and work.