Neonatal & Pediatric Fluids
This calculator determines IV maintenance fluid requirements for neonates and children from a patient's weight and age. For neonates (postnatal age 28 days or less), it uses day-of-life- and weight-band-specific neonatal fluid requirement tables, with separate ranges for preterm infants under 1.5 kg versus larger or term infants; for older infants and children it switches to the Holliday-Segar (100/50/20) rule. It reports total daily fluid volume, the equivalent hourly IV rate, and a per-kilogram rate, alongside a suggested fluid type and electrolyte guidance for the calculated group.
The calculator uses the neonatal, day-of-life-based table for postnatal age 28 days or less, and switches to the Holliday-Segar 100/50/20 rule beyond that, with a low-weight (<3.5 kg) exception that still uses the neonatal post-first-week range.
The app's neonatal table gives a different mL/kg/day range for each of the first six days of life, after which (day 7 onward) it plateaus at a flat 140-160 mL/kg/day for both term and preterm groups.
Yes — the app uses a separate table for infants under 1.5 kg (preterm) that runs at different mL/kg/day ranges than the term/larger-infant table for the same day of life, until both converge after the first postnatal week.
For Day 1-2 neonates it suggests typically 10% Dextrose with no electrolytes initially, adding sodium and potassium from around Day 2-3 once urine output is established.
No — the tool displays a warning that the calculated maintenance volume should be adjusted for clinical status such as phototherapy, a radiant warmer, fever, RDS, SIADH, renal failure, or excess losses, since these change requirements beyond the baseline formula.