Medical Math Help

[ADalton]

I have the answer key to this, and I'm doing fine with everything else but the two piggy back questions have me stumped. I have a test Monday for this and this is the only section I feel unsure about. Can anyone explain to me how to set up the proportion for this?

15. Order: 2 g Keflin IV piggyback in 100 ml D5W over 30 mins.

[loveofrn, BSN, RN]

Welcome to AN; before we jump in to help you at least tell us how you approached the problem

[ADalton]

I had been setting up my proportions by:

mg mg

__=__

X ml/hr

but that obviously doesn't work with this problem. I have searched google for help so even a link that is a tutorial would be wonderful. I'm feel super discouraged. It's been almost a year since I've taken medical math so I am a little rusty :-(. Most of it came back but I'm drawing a blank with this :-(.

[ADalton]

The answer on the key is 66.7 mg/min but I have tried several different ways and I haven't gotten anywhere close.

[loveofrn, BSN, RN]

ok it is not a rocket science..

if the question asks you how many mg/min, then (2g to mg is 2000mg)

so, 2000mg/30min= 66.67

However if the question asks how many ml/min, then it is (100ml/30)=3.3ml/min

[ADalton]

The piggy back threw me off and the set up is different than the other questions in this area. Thank you so much, I was getting so frustrated and it just wasn't clicking tonight. They have a few other piggy back practice problems I can try in my study packet, I'm going to attempt the, now, thank you so much again.

[loveofrn, BSN, RN]

You are welcome, make sure you continue to visit this site because it will really help you in the long run

[KelRN215, BSN, RN]

The answer on the key is 66.7 mg/min but I have tried several different ways and I haven't gotten anywhere close.

The question that you posted doesn't say what they are looking for. If the question is how many mg/min and you are giving 2,000 mg over 30 min, it's simple division to get to that answer.