Please help!! Calculation question

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by suzana123
  1,739 Views   4 Comments

  1. Hi all,I'm having problem with this question:A procainamide drip is ordered (2gms in 250ml D5W) to infuse at 4 mg/min. The patient weighs 165lb. Calculate the drip rate in ml/hr for which theinfusion pump will be set at. Many thanks
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  2. 4 Comments

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  3. by bayou
    Oct 10, '12
    Step 1. Convert g to mg
    2g =2000 mg
    Step 2. How many hours will be used
    2000 mg / 4 mg =500 mins = 500/60 =50/6 hrs
    Step 3. 250 ml / 50/6hrs = 30 ml/hr

    Patient weight no need in this case.

    It can be solved in different way.
  4. by suzana123
    Oct 10, '12
    Thank you so much!! If it's not too much to ask what is the other way to solve this?Thanksl
  5. by lavender59
    Oct 10, '12
    Here's another way to arrive at 30mL /hr using dimensional analysis.
    Cross out units that are the same.

    4mg/min x 1g/1000mg x 250mL/g x 60min/1hr = 60,000/2,000 =30mL/hr
    Last edit by lavender59 on Oct 10, '12 : Reason: typos
  6. by suzana123
    Oct 11, '12
    Thank you all so much,

    I'm taking NCLEX-RN on the 30th this month (2nd time).

    I,m sooooooo scared

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