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Discussion

Help with Dosage Calculation

Hello, I was hoping to get a little help with a reconstitution math problem. I see that someone posted the same problem, unfortunately I keep coming up with a different answer. Thanks:confused:

Order: Zosyn 2.5g

Available: 3.375g vial of powered Zosyn

Directions: Reconstitute Zosyn w/ 5mL of saline for a total solution volume of 5mL

Give_____

This is my formula: 3.375/2.5 = 1.35

1.35x5mL = 6.75mL

My answer: give 6.75mL

The correct answer is 3.7mL, what am I doing wrong?

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    • Featured Replies

    Your formula should be: Desired dose divided by dose on hand times quantity. SO...

    2.5/3.375=0.74.... x 5=3.7mL

    :)

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    • Author

    Thanks, I am an idiot!!!!:lol2:

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    LOL I doubt that! We just testined on this last week, so it's fresh! ;)

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    Wow, make that TESTED! LOL

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    Order: Zosyn 2.5g

    Available: 3.375g vial of powered Zosyn in 5 mL

    3.375g / 5 mL = = 2.5g/ x mL

    solve for the mL

    5 mL * 2,5g/ 3.375g = 3.7mL

  • Quote

    Hi,

    I have a question about the same problem previously discussed, just with a different request.

    Order: Zosyn 2.5g

    Available: 3.375g vial of powered Zosyn

    Directions: Reconstitute Zosyn w/ 5mL of saline for a total solution volume of 5mL

    The concentration is _____ g/ml

  • Quote
    Hi,

    I have a question about the same problem previously discussed, just with a different request.

    Order: Zosyn 2.5g

    Available: 3.375g vial of powered Zosyn

    Directions: Reconstitute Zosyn w/ 5mL of saline for a total solution volume of 5mL

    The concentration is _____ g/ml

    How much powder do you have? 3.375g

    With what volume of NS are you to reconstitute it? 5 mL

    So, how many grams will be in each mL if there are 3.375g in 5mL?

  • Quote

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