Electrolyte Imbalance Replenishment Formula 1999.4.12

Electrolyte Imbalance Replenishment Formula 1999.4.12

1. Potassium Replenishment Formula

Potassium chloride (g) = [5 - serum potassium (mmol/L)] × body weight (kg) × 0.0149

Using the above formula, for a patient with a serum potassium level of 3 mmol/L and a body weight of 50 kg, the potassium supplementation required is 1.5 g, equivalent to 15 mL of 10% KCl solution (one and a half vials).

2. Alkaline Replenishment Formula

5% NaHCO₃ (mL) = (50 - CO₂-P) × 0.5 × body weight (kg)

For an adult weighing 50 kg, raising CO₂-P by 2 units requires 50 mL; thus, raising CO₂-P by 1 unit requires 25 mL, and 250 mL can raise CO₂-P by 10 units.