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28 August, 23:45

A patient needs to be given exactly 1000 ml of a 5.0% (w/v) intravenous glucose solution. the stock solution is 55% (w/v). how many milliliters of the stock solution are needed to prepare the fluid for the iv bag?

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  1. 29 August, 03:26
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    The patient needs 1000 ml of 5% (w/v) glucose solution

    i. e 1000 ml x 5 g / 100 ml

    where the stock solution is 55% (w/v) = 55 g / 100 ml

    So, 1000 ml x 5 g / 100 ml = V (ml) x 55 g / 100 ml

    V = 1000 x (5 / 100) / (55 / 100) = 5000 / 55 = 90.9 ml

    ∴ the patient needs 90.9 ml of 55% (w/v) glucose solution
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