Help another Medmath please help

[dobletruble]

Hey guys. please help me solve this question:

The preterm labor client was started on Yutopar (retodrine hydrochloride) tocolytic therapy, 150 mg in 1000 ml of D5W to run at 60 drops per minute. The drop factor is 20. How many milligrams of ritrodrine would the client receive per minute at the prescribed rate?

Please do not use dimensional analysis as i have no idea what you are doing. Unless you can break it down to its core do not use dimensional analysis.

please help me solve it. Thank you

[morte, LPN, LVN]

so, if they are getting 60 drops a minute, at 20 drops per ml, how many ml per minute..

so, if there are 150mg in 1000ml, how many mg per ml? (150 divided by 1000)

[Tharem]

Well, you know she's receiving 60 drops per minute, and that each mL contains 20 drops, so each minute she is receiving 3mL. If there are 150mg of drug in each 1000mL of solution, then there are 6.67mg of drug in each mL of solution. So that would mean she is receiving 6.67mg X 3mL or 20mg of Yutopar per minute.

[robin george]

hello

my problem is 5mcg/kg/mim is ordered the solution ava is 400mg dopamine in 250 ml of d5w the pt weights 70.7kg how do i work this

thans robin

[Tharem]

hello

my problem is 5mcg/kg/mim is ordered the solution ava is 400mg dopamine in 250 ml of d5w the pt weights 70.7kg how do i work this

thans robin

Your problem should also state what you're looking for. I assume it's mL/hr. Start by calculating how many mcg/min is ordered by multiplying 5mcg by 70.7kg, which equals 353.5mcg/min. Now convert that to mg/min since the drug concentration is stated in mg. that equals 0.35mg/min. Now use dimensional analysis to multiply dose ordered by dose on hand and add any conversion factors you need (dots added for formatting):

0.35mg X 250mL X 60min = 53mL

..min.......400mg....1hr........1hr..

If you don't understand dimensional analysis, it's a simple, consistent method that's worth learning and allows you to slice through most problems with ease.