# Need Help with this drug calculation

1. Hello,

I'm a med/surg nurse who needs a little help with this math problem.

I am trying to refresh my math skills that I haven't used in a long time. The problem is a procainamide drip is ordered for 2mg/min. the standard mixture is 2g in 500 ml. What should the iv pump be set for ml/hr? I need a formula or something. Thanks
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Joined: Feb '04; Posts: 2

3. Quote from rrhardiman2
Hello,

I'm a med/surg nurse who needs a little help with this math problem.

I am trying to refresh my math skills that I haven't used in a long time. The problem is a procainamide drip is ordered for 2mg/min. the standard mixture is 2g in 500 ml. What should the iv pump be set for ml/hr? I need a formula or something. Thanks
2000mg/500ml =4mg/ml = 0.5ml/min = 30ml/hr

This is the way I make sense of figuring these calculations. I know there is a more appropriate way, but I get to the same number.
4. Quote from rrhardiman2
Hello,

I'm a med/surg nurse who needs a little help with this math problem.

I am trying to refresh my math skills that I haven't used in a long time. The problem is a procainamide drip is ordered for 2mg/min. the standard mixture is 2g in 500 ml. What should the iv pump be set for ml/hr? I need a formula or something. Thanks
2g/500mL=2000mg/500mL=20mg/5mL=2mg/0.5mL (1g=1000mg by definition)
Since there are 2mg in each 0.5mL, the flow rate should be 0.5mL/min.
and 60 minutes x 0.5mL/minute = 30 mL/hour.

As a check, 30 mL/hr x 2mg/0.5mL=120 mg/hr. Also 2 mg/min x 60 min = 120 mg/hr.
5. Quote from Nursewise
2g/500mL=2000mg/500mL=20mg/5mL=2mg/0.5mL (1g=1000mg by definition)
Since there are 2mg in each 0.5mL, the flow rate should be 0.5mL/min.
and 60 minutes x 0.5mL/minute = 30 mL/hour.

As a check, 30 mL/hr x 2mg/0.5mL=120 mg/hr. Also 2 mg/min x 60 min = 120 mg/hr.
Thanks for the info. I think I can get it from here.
6. Order Label Conversion factors..... in the end we want ml/hr
2mg x 500ml x 60min x __1 g__ = 30ml/hr
min 2 g 1 hr 1000mg

That's the way I would set it up....:thnkg:
7. Quote from julscas
Order Label Conversion factors..... in the end we want ml/hr
2mg x 500ml x 60min x __1 g__ = 30ml/hr
min 2 g 1 hr 1000mg

That's the way I would set it up....:thnkg:
Perfect Help thanks!
ELP