What is the TBSA percentage for an adult arm?

The total body surface area (TBSA) percentage for an adult arm is 9%. This percentage is determined based on the "Rule of Nines," which is a method used to estimate the size of burns on the human body. According to this rule, the adult body's surface area is divided into sections that represent approximately 9% or multiples of 9% of the TBSA, making it easy to calculate.

In this context, each arm is allocated 9% of the TBSA. For further clarity, the head and neck account for 9%, each leg for 18%, the anterior trunk for 18%, the posterior trunk for 18%, and the perineum for 1%. Understanding the TBSA percentages is crucial for assessing burns, determining treatment plans, and guiding fluid resuscitation in burned patients.