Calculating PGE drips

Hi everyone! I am a new nurse still in orientation and working in the NICU. Yesterday was my first time having an intensive assignment (as opposed to progressive) and I was taking care of a little guy waiting for a new heart. He was on a prostaglandin drip. My preceptor went over how to calculate the drip with me and I understood it. Later in the day she even gave me someone elses PGE to second check and I did it correctly. Now here I am at home today trying to go over it and I cant figure out how to second check someone elses rate . Can anyone help me out?
Baby is 3.9 kg
PGE order is .025mcg/kg/min
PGE concentration is 500mcg/mL
Thanks in advance for any help 

Aug 19, '06I'm not sure if this is correct, so we'll wait and see if one of the other more experienced ones can come in and help us out, but I wanted to try and see if I could do this correctly .........
My preceptor told me when checking the rates, to multiply each thing. So each "/" means to multiply. Therefore:
(.025)mcg X (3.9)kg X (60) min = 5.85
Then you divide that by the concentration, so:
(.025)mcg X (3.9)kg X (60) min = 5.85 = .0117 mL/hr
500 mcg/mL
Not sure if that's right though ........ I wonder if I did it right?! 

Aug 21, '06Yay! I got it!
Well I guess I did get it, since no one is disputing it, lol. So there ya go, there's your answer! 
Aug 22, '06I am okay with calculating the rate. It ran at 0.6 ml/hr.
I use the dose desired/dose on hand calculation method:
dose desired: 0.025mcg/kg/min = 0.025/3.9 = 0.0975mcg/min
(then change mcg/min to mcg/hr since that is
what the pump runs at) = 0.0975 X 60 min
= 5.85mcg/hr
dose on hand : 500mcg/50ml = 10mcg/ml
complete calculation: 5.85mcg per hour/ 10mcg per ml
= 0.585ml/hr
Now my problem is with the second checking of someone else who is getting ready to start PGE. They bring me their syringe of PGE, tell me the kiddos weight and the rate they are running it at. Then I am supposed to work things backwords and tell them the original doctors order (0.025mcg/min). I hope that made sense.
I am just hoping that someone here with more experience has an easy way of helping me learn and remember this. Thanks! 

Aug 22, '06Quote from RainDreamerI calculated using a different method and got the same answer. I think the post that Love4Me posted was calculated using a different concentration500mcg/50mL compared to the 500mcg/mL that you usedI'm not sure if this is correct, so we'll wait and see if one of the other more experienced ones can come in and help us out, but I wanted to try and see if I could do this correctly .........
My preceptor told me when checking the rates, to multiply each thing. So each "/" means to multiply. Therefore:
(.025)mcg X (3.9)kg X (60) min = 5.85
Then you divide that by the concentration, so:
(.025)mcg X (3.9)kg X (60) min = 5.85 = .0117 mL/hr
500 mcg/mL
Not sure if that's right though ........ I wonder if I did it right?! 
Aug 22, '06You guys are right. My original post should have had the concentration 500mcg/50ml. Sorry


Aug 24, '06we actually have charts for things like dopamine, dobutamine, epi, prostaglandin. You look at weigh in grams across the top then the mcg/kg/min down the side. It then gives you the hourly rate according to our hospitals standard concentration. It's nice because there is less room for error and is quicker in an emergency.

Aug 25, '06Quote from Love4MeDoh! I should have known that something was up with that concentration!You guys are right. My original post should have had the concentration 500mcg/50ml. Sorry