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Applies the Holliday-Segar daily rule — 100 mL/kg for the first 10 kg, 50 for the next 10 and 20 thereafter — and adds any dehydration deficit.
Holliday-Segar daily maintenance
100 mL/kg for the first 10 kg + 50 mL/kg for the next 10 kg + 20 mL/kg beyond 20 kg; deficit (mL) = weight (kg) x 1000 x dehydration fraction
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
Usually over 24 to 48 hours alongside maintenance, except in shock where boluses are given first.
Isotonic solutions are now standard for maintenance in children to avoid hyponatraemia.