Rule of 9s for Burns
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þ Rule of 9s for Adults
 - there are 11 areas of the body, each of 9%, totalling to 99%, +1% for the
   genital area.
 - areas:
  head
  arms (2)
  anterior chest
  posterior chest
  abdomen
  lower back
  anterior leg (2)
  posterior leg (2)
  (legs can also be divided above the knee)

þ 1% rule
 - in adults, the patient's palm is about 1% of TBSA
 - in pediatrics, the palmar aspect of the hand (including fingers) is about
   1% of TBSA
   [Hagel TR, Schunk JE. Using the hand to estimate the surface area of a burn
   in children. Pediatr Emerg Care 1997;13:254:55.]