1. Pediatric IV Fluid Maintenance Formula: Answer 100/50/20 Rule :IV Fluids Needed in a Day 100 mL/kg for the first 10 kg (1-10 kg) 50 mL/kg for the next 10 kg (11-20 kg) 20 ml/kg for every kg after (21 kg and above) Divide the result by 24 for the hourly maintenance rate. 2. IV normal saline (0.9%): Answer Simple saline solution. Crystalloid. Isotonic. Will not cause electrolyte imbalance except in cases of kidney disease, CHF, or other situations that may cause fluid overload. 3. IV half-normal saline (0.45%): Answer Diluted saline solution. Crystalloid. Hypotonic. Used for concentrated electrolytes. Risk for electrolyte deficiency. 4. IV Hypertonic Saline (1.8%): Answer Concentrated saline solution. Crystalloid. Hyper- tonic. May be given for severe hypernatremia. Risk for swelling of brain.