EM Pediatric Formulas
Listed below are the most commonly used formulas and calculations in pediatric
emergency medicine.
| Equation |
Formula |
| Sodium Deficit |
= Total Body Water * Normal Wt in kg * (Pt's Na - Desired Na)
(TBW = 0.6 if male and 0.5 if female) |
| Bicarb Deficit |
= 0.4 * Wt in kg * (24 - Pt's bicarb level) |
| Endotracheal Tube Size |
= (Age / 4) + 4 |
| Anion Gap |
= Na - (Cl + HCO3-) |
| Maintenance Fluids |
Calculated Using the "4-2-1" Rule:
- For 0-10kg: 4 mL/kg/hr
- For 10-20kg: + 2 mL/kg/hr
- For >20kg: + 1 mL/kg/hr
|
| Fluid Bolus |
= 20 mL/kg |
| Serum Osmolality |
= (2 * (Na + K)) + (BUN / 2.8) + (glucose / 18) |
