Flow Rate Calculation Problem

Thank you everyone for the replies confirming I did not forget how to do math between questions.

I got the same answer, using dimensional analysis (as I've been taught) and the formula you provided.

you divide 120 by 20 to get 6

then you divide 500 by 6 to get 83

this is correct answer--

Emmel is right. You have a total of 500mL to be infused at 120mL/hr or in 60 minutes. Divide 500 by 120 which equals 4.17.Then times that by 20 and you get 83. That is how we learned to do it.

What are you doing with the 60 minutes?

An IV of 500 mL is to infuse at 120 mL/hr using a 20 gtt/mL calibrated set. ( pg 281 math for meds 10th edition)

Sorry for the confusion. 60 minutes is not part of the problem. It says 20gtt/mL or 20gtt per mL. So we have to find the mL to be infused. That is why we divide 500 by 120. That will give you the mL that will be infused 4.17. Then you times 4.17 by 20gtt to get the answer of 83.

Thanks!

Hey guys. The below answer to this question is completely wrong. If you divide (and you always have to make sure that your units are divided as well with the numbers) 500mL by 120mL/ hr it looks like this:

500mL / (120mL/hr)

=4.17hr

So, you see that 4.17 is not the number of mL's that is being infused, it is the number of hours that you will infuse 120mL/hr to achieve the 500mL total that is desired with the stated setting. The math for these 5 problems is incorrect and should be ignored.