Can Someone explain?

  1. Can someone give me a grounded formula that will work for all IV problems?
    I know i just posted one before, but i still do not undertsand the formula.

    My dosage and calculations book tells me V/T*drip factor=rate
    I plug this problem in
    You have a new order for 10000 U Hep. in 500 ml NS to infuse at 750 U/hr. The drop factor is 60/gtt/ml. What is the flow rate in gtt/min.

    So if i use V/T * drip = rate i get this
    500ml/60 minutes * 60gtt/1ml this equals 500 ... that is way too high. What am i doing wrong?
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  2. 3 Comments

  3. by   Daytonite
    Quote from redneckrn2b
    Can someone give me a grounded formula that will work for all IV problems?
    I know i just posted one before, but i still do not undertsand the formula.

    My dosage and calculations book tells me V/T*drip factor=rate
    I plug this problem in
    You have a new order for 10000 U Hep. in 500 ml NS to infuse at 750 U/hr. The drop factor is 60/gtt/ml. What is the flow rate in gtt/min.

    So if i use V/T * drip = rate i get this
    500ml/60 minutes * 60gtt/1ml this equals 500 ... that is way too high. What am i doing wrong?
    Your "V" figure is wrong. The volume you want to infuse is what contains 750 units of Heparin because that is the dose you desire. To get the volume for 750 units you need to figure out that in 500ml that has 10,000 units of Heparin, 750 units will be in 37.5mL. Plug that figure into your formula.
    Then, 37.5mL/60 minutes x 60 gtts/1 mL = 37.5 gtts/minute
  4. by   redneckrn2b
    But how did you get the 37.5 ml for 750 u??
  5. by   C41H64O14
    10000 U / 500 ml = 750 / X

    Cross multiple and you get 10000X = 375000

    375000 / 10000 = 37.5 ml

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