What percentage of body surface does the head account for in the rule of nines?

In the context of the rule of nines, which is a method used to estimate the total body surface area affected by burns, the head accounts for 9% of the total body surface area in adults. This percentage is essential for quickly evaluating burn severity and planning treatment accordingly.

The rule divides the body into sections, each representing approximately 9% or multiples of 9% of total body surface area. The head is specifically represented as 9%, while each arm accounts for 9%, the front of the torso is 18%, the back of the torso is another 18%, each leg accounts for 18%, and the groin area is 1%. Understanding these percentages is crucial for healthcare professionals to ensure proper care is administered based on the extent of burns.