Please help!! Calculation question

1. 0 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. 
   #1 0

   Oct 10, '12 by bayou

   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. 
   #2 0

   Oct 10, '12 by suzana123

   Thank you so much!! If it's not too much to ask what is the other way to solve this?Thanksl
5. 
   #3 0

   Oct 10, '12 by lavender59

   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. 
   #4 0

   Oct 11, '12 by suzana123

   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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