# Math...again - page 2

Here i am once again. i do not understand the drip factor stuff. I have an order of Aminophylline 1gm in 500 cc d5w to infuse at 0.5mg/kg/hr for a pt weighing 154. The first question is what is... Read More

1. fyi. . .tweety opened up a new sticky on the general nursing student discussion forum
i posted all the weblinks i have to math and medication calculation practice problems on post #3 of the thread. you can also see lots of different problems that have been worked out on this sticky which is on this forum
happy calculating!
2. Quote from SarasotaRN2b
Butyou have to use the right formula! What's wrong with reasoning through a problem?
There's nothing wrong with reasoning through a problem.

I just have a preference for formulas as I have an easier time remembering them and such.

AND, in case you are getting at what I think you are getting at...I view the "reasoning" of chosing the right formula for a problem as different from reasoning *your way through* a problem.
3. Quote from Cosper123
There's nothing wrong with reasoning through a problem.

I just have a preference for formulas as I have an easier time remembering them and such.

AND, in case you are getting at what I think you are getting at...I view the "reasoning" of chosing the right formula for a problem as different from reasoning *your way through* a problem.
Yes, but if you don't have the right formula, it won't help much. I don't know what you think I'm getting at...but that was a comment made in general, not towards you. It's just something that I found that helps me put everything in the right position. Maybe it will help someone else.
4. If you're using dimensional analysis there is really only one formula to be concerned with:
dose desired divided by dose on hand to give you the dose you want to give
You only want to make sure you have the dose desired and/or dose on hand term in your calculation (if that is what is called for). Everything else in the formula is a conversion factor, including the drip factor of any IV tubing, and put into the resulting formula designed to give you an answer with the correct labels on the numerator and denominator of the final answer. How much easier can you get?