K+ correction = Deficit + Maintenance
K+ Deficit (mmol) | = (4.0 – K+) x 0.3 x Wt |
K+ Maintenance (mmol) | = 1 x Wt |
Requirement (gram) | = (Deficit + Maintenance) ÷ 13.3 mmol |
Eg: Current K+ 2.8, Wt 50 kg
K+ Deficit (mmol) | = (4.0 – 2.8) x 0.3 x 50 kg = 18 mmol |
K+ Maintenance (mmol) | = 1 x 50 kg = 50 mmol |
Requirement (gram) | = (18 mmol + 50 mmol) ÷ 13.3 mmol = 5 gram |
Paeds safe rate: [Required K+ (gram) x 13.3 x drip rate] ÷ [500 x Wt (kg)]
Safe rate 0.2 – 0.4 mmol/kg/day
10 mL Mist KCL = 1 gram K+