Parkland burn formula + rule of 9s

Initial burn fluid resuscitation. Titrate to UO 0.5-1 mL/kg/hr. Modern guidance recommends modified Brooke (2 mL × kg × %TBSA) when over-resuscitation is a concern.

Parkland: 4 mL × kg × %TBSA = total LR over 24h
Give half in first 8h (from injury, not from arrival)
Give remaining half over next 16h

Rule of 9s (adult):
  Head + neck:        9%
  Each arm:           9%
  Anterior trunk:    18%
  Posterior trunk:   18%
  Each leg:          18%
  Perineum:           1%

The calculation function is live in the codebase. Interactive form UI is being added — formulas above are reference-grade and ready to use at the bedside.