Assess Mitch's intake/output record for the first 24 hours of his admission. What does this tell you? Assuming that Mitch tells you that his usual weight is 228 lbs., can you estimate the volume of his dehydration?
What will be an ideal response?
• According to his I/O record since admission, Mitch has a positive balance, meaning he consumed more fluid than there was fluid loss. His net input was 2140 mL. This means that he was dehydrated; i.e., greater input than output confirms that his body is being replenished with fluid. Otherwise, his net I/O would be more balanced.
• Usual weight = 228 lbs., current weight = 214 lbs. Weight loss = 228 – 214 = 14 lbs. lost. 14 lbs. / 228 lbs x 100% = 6% weight loss. 14 lbs / 2.2 = 6.4 kg or ~6 liters of fluid loss (1 L = 1 kg).
OR 14 lbs / 2.2 . lbs/kg / 999.97 kg/m3 x (100 cm/m)3 / 1000 cm3/L ≈ 6.4 L
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