Neonates with hypovolemic hyponatremia need volume expansion, using a solution containing salt to correct the sodium deficit (10 to 12 mEq / kg [10 to 12 mmol / kg] of body weight or even 15 mEq / kg [15 mmol / kg] in young infants with severe hyponatremia) and include sodium maintenance needs (3 mEq / kg / day [3 mmol / kg / day] in 5% dextrose solution).