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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  2. 5 Comments

  3. by   mittels
    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. by   Nursewise
    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. by   rrhardiman2
    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. by   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:
  7. by   elprup
    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

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