ABSTRACT
Pediatric Surgery Overview Management of Fluids and Electrolytes Maintenance IV fluids can be written using one of two formulas: The 4-2-1 Rule is written in mL/hr and is as follows; 4 mL/kg/hr up to 10 kg of
body weight, additional 2 mL/kg/hr for each kg above 10 and up to 20 kg, addi tional 1 mL/kg/hr for each kg above 20 kg body weight.
