math math math help!

[kalhonaaho]

Q5. Order: Xylocaine 2 g in 500 mL of D5W to be run at 2 mg/min.

At what flow rate will you set the IV pump?

Can some one help me figure this out please? What is the formula for flow rate?

Thanks!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[Student4_life]

30ml/hr

[debstmomy]

First convert grams to mg.

Then take your 2mg & times it by 60 mins to get 120mg per hour.

After that you can do ratio & porportion & figure it out.

2000mg/500ml x 120mg/xml's

2000x : 60000

30ml/hr or 30cc/hr

[Student4_life]

Just a pre-nursing student, but this is how you do it.

2g/500mL=4g/1L=4000mg/1L

we want to know how fast to set the pump, knowing that we want the client to recieve 2mg/min

(1000mL x 2mg x 60min)/(4000mg x 1min x1 hr) = (1mL x 2mg x 60min)/(4mg x 1min x 1hr) => cancel units (1mL x 2 x 60)/(4x1x 1hr)

=> multiply across 120mL/4hr => reduce => 30mL/hr

or if needed you can leave off the whole min to hr conversion, like I said I am still pre-nursing and dont know if flow rate is per min or hour, but I doubt it matters

and sorry about the lines, the program wont let me use spacebar... (or lines as it appears, but I hope you can follow)

and it looks like I got beat to the punch on the explaintation...

[mmgirlsmom]

Another way

ordered 2g in 500 ml, to run at 2 mg/min

convert minute to hour = 2mg x 60 min - 120 mg/hr

convert mg to g by dividing by 1000 = 0.12 g

0.12 g / 2 g x 500 ml - 30 ml/hr

Seems like everyone has their own way of doing it.

[kalhonaaho]

Thank you everyone for helping me!!