med math problem

[YummyMummyRN]

Hey Y'all!! I hope you can help -- I need a step by step explaination to acheive the answers. It shouldn't be as difficult as I'm making it seem.

THANKS ALL!! (:

1) A new medication, Z, comes as a powder which must be reconstituted as follows: IV use: Add 24ml of sterile water for injection. Each 2.5ml of resulting solution contains 500mg of Z. How many ml must be injected into a 100ml IV bag of NS to equal 1.5g of Z?

2) Procainamide drip is ordered for 2mg/min. The standard mixture of procainamide is 2g in 500ml. At how many ml/hr should the IV pump be set?

3) A unit of packed cells (approx 240ml) is to be administered over 4 hours. The blood tubing has a drop factor of 10 gtt/ml. Calculate the drip rate in gtt/min in order to administer the blood over 4 hours.

4) Physician orders a Heparin Bolus of 5,000 units IV followed by a Heparin drip at 1,000 units per hour. The standard mixture of Heparin in 25,000 units/ 500 D5W. How many ml/hr should the pump be set to administer the Heparin drip?

[emtb2rn, BSN, RN, EMT-B]

Please show us how you're figuring these out & where your confusion lies. This looks like you're asking us to do your homework....

Also, you have an RN in your screenname, are you still in school?

[locolorenzo22, BSN, RN]

You need to show us your work...this is not a "do your homework" for you forum...then we can help.

[RedhairedNurse, BSN, RN]

Hey Y'all!! I hope you can help -- I need a step by step explaination to acheive the answers. It shouldn't be as difficult as I'm making it seem.

THANKS ALL!! (:

1) A new medication, Z, comes as a powder which must be reconstituted as follows: IV use: Add 24ml of sterile water for injection. Each 2.5ml of resulting solution contains 500mg of Z. How many ml must be injected into a 100ml IV bag of NS to equal 1.5g of Z?

2) Procainamide drip is ordered for 2mg/min. The standard mixture of procainamide is 2g in 500ml. At how many ml/hr should the IV pump be set?

3) A unit of packed cells (approx 240ml) is to be administered over 4 hours. The blood tubing has a drop factor of 10 gtt/ml. Calculate the drip rate in gtt/min in order to administer the blood over 4 hours.

4) Physician orders a Heparin Bolus of 5,000 units IV followed by a Heparin drip at 1,000 units per hour. The standard mixture of Heparin in 25,000 units/ 500 D5W. How many ml/hr should the pump be set to administer the Heparin drip?

I see you just passed you nclex and got your RN. Why do you still need to know this math? Is it because your employer is making you take such tests?

[RedhairedNurse, BSN, RN]

Here is the answer to number #2 in dimensional analysis form. If you still need help with other's let me know. I love dimensional anaylsis....It makes figuring this stuff out much more simple.

2 mg ---- 1 g --------- 500 ml ------ 60 min ----- --60

_________________________________________ = ____ = 30ml/hr

min ----- 1000mg------- 2g --------- 1 hour ------- 2

The zero's can cancel all out making it 60/2. I use the dash lines because I can't make vertical lines. I hope you understand how I have this set up. If you need more help, let me know. I'll be glad to help all I can.