Dosage Calculation Question

  1. 0
    Ok, Im suppose to use DA for this and Im a bit confused about how to set it up:

    Ordered: Heparin gtt 21 u/kg/hr
    Supplied: 28,000 u/300ml
    Weight: 170lbs

    How many ml/hr will be administered?

    I have a feeling I am way over-thinking this since mL/ hr is usually just total volume / # hrs to infuse. The persons weight equals 77 Kg. There are 100 units per 1 mL. The 21 units become 0.21 mL. The 0.21 mL * 77 kg= 16 mL total to give to patient.

    Im stuck at what to do at this point. Any help?
  2. 8 Comments so far...

  3. 0
    I'm just a student, too.

    I get 17ml/hr because I didn't round until the end. I may be wrong
  4. 0
    How did you work that out?
  5. 0
    do you not do anything with the :
    Supplied: 28,000 u/300ml ??
  6. 0
    21x77=1617units/hr


    28,000u 1,617u
    --------- = ---------
    300ml 17.325ml


    17ml/h


    The 28,000u/300ml is where you get 100u/ml (but I didn't round it like that)
  7. 0
    Bless you!
  8. 1
    Quote from PedsHopeful
    Ok, Im suppose to use DA for this and Im a bit confused about how to set it up:

    Ordered: Heparin gtt 21 u/kg/hr
    Supplied: 28,000 u/300ml
    Weight: 170lbs

    How many ml/hr will be administered?

    I have a feeling I am way over-thinking this since mL/ hr is usually just total volume / # hrs to infuse. The persons weight equals 77 Kg. There are 100 units per 1 mL. The 21 units become 0.21 mL. The 0.21 mL * 77 kg= 16 mL total to give to patient.

    Im stuck at what to do at this point. Any help?
    There are not 100 units/mL. There are 28,000 units of heparin in 300 mL of fluid which is 93 u/mL.

    You are to administer 21u/kg/hr to a patient who weighs 77 kg.

    21 u/kg/hr x 77 kg x 1 mL/93 units = 17 mL/hr.
    Esme12 likes this.
  9. 1
    Once you get kg amount (77.27)...The rest is easy..

    Want
    ------ x Volume.
    Have

    What you want is 1623 units a hour (77.27 x 21) rounded

    What you have is 28,000

    divide 1623 by 28000 then times it by your volume. Answer is 17.38 or 17 mls/hr
    Esme12 likes this.
  10. 0


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