Free water deficit calculator for dehydration based on serum sodium, weight and patient group.
Free Water Deficit
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Estimated free water deficit
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Applied K-factor
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Target sodium
Calculation:
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Interpretation:
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Formula
- Deficit (L) = K x weight (kg) x ((S-Na / target-Na) - 1)
- K: child 0.6, adult male 0.6, adult female 0.5, older male 0.5, older female 0.45
This calculator is a clinical aid and does not replace medical judgment.