When performing adequacy testing, specifically 24 hour batch, is the correct procedure to use the patient's ACTUAL body weight or to use their IDEAL body weight (fat free, edema free body mass)?

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Terri B, Nurse from South East USA asked
When performing adequacy testing, specifically 24 hour batch, is the correct procedure to use the patient's ACTUAL body weight or to use their IDEAL body weight (fat free, edema free body mass)?

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Traditionally, people use the crude body weight to calculate the Kt/V. There has been proposal to use ideal body weight, dry weight, but the advantage has not been demonstrated over crude body weight.

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