Calculation problem

itsmejuli · Jun 16, 2010

Can someone please help me with this calculation? I'm not just looking for an answer, but how do you go about getting the answer. Thanks so much
Order: add 2 grams Thiamine to 1000 cc IV fluids
Available: 500 per 5cc
Volume in IV fluid bag 500 cc.

The order is to put the 2 grams into 1000 cc of IV fluid but your IV fluid bags contain 500cc. So you're going to have to divide the 2 grams of Thiamine between the two 500 cc bags.

I gather that the available should read 500mg per 5cc.

So ask yourself how many mg are in a gram? Then how many units of '500 mg per 5cc' do you need to make 2 grams?

Hope this makes sense.

Sniper RN · Jun 16, 2010

Order: add 2 grams Thiamine to 1000 cc IV fluids

Available: 500 per 5cc

Volume in IV fluid bag 500 cc.

DO (dose ordered)

DH (dose on hand) =___________ x ___ml (the drug NOT the bag) =________

so

2000 mg (Dose Ordered)

500 mg (Dose on Hand )= ____4_______ x 5 ml (given in the question 500 per 5cc) = 20 ml

so 20 ml would be for a 1000 ml bag but all you have are 500 ml bags. I know it's easy to see but incase you find one that is not.

1000 ml

500 ml = ___2___ so you know to divide 20 by __2___

20ml

2 = 10 ml

Answer:

10ml in a 500 ml bag

I hope this helps and I didn't confuse you more.