Potassium = 2.5 mEq/100/calories x 1,500 calories/day
= 1,500 calories x 2.5 mEq/day
100
= 37.5 mEq/day

B. Calculated deficit = 20 kg - 18 kg x 100% = 10% deficit
                                                   20 kg

Volume = 8 ml/kg/% = 8 ml x 20 kg x 10 = 1,600 ml
Sodium = 0.8 mEq/kg/% = 0.8 mEq x 20 kg x 10% = 160 mEq
Potassium = 0.3 mEq/kg/% = 0.3 mEq x 20 kg x 10% = 60 mEq

C. No ongoing losses

Total 24-hour volume requirement = Maintenance + Deficit = 10,500 + 1,600 = 3,100 ml = 3.1 L

Total 24-hour sodium requirement = Maintenance + Deficit = 37.5 + 160 = 197.5 mEq

Total 24-hour potassium requirement = Maintenance + Deficit = 37.5 + 97.5 mEq

Solution of choice = 5% dextrose with 197.5/mEq sodium chloride/3.1 L + 97.5 mEq potassium chloride/3.1 L = 5%

Dextrose with 64 mEq sodium chloride/L + 30 mEq potassium chloride/L

Final solution = 5% dextrose with 0.45% isotonic saline + 30 mEq Potassium chloride/L

For hours 2 to 8 = 50% of 3,100 ml = 1550 ml/7 Hours = 221 ml/hour

For hours 9 to 24 = 1550 ml for 16 hours = 97 ml/hour

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