How much of the total body surface area does the head represent in the Rule of Nines?

In the assessment of burn injuries using the Rule of Nines, the total body surface area (TBSA) is divided into sections that are easy to calculate. Specifically, the head is assigned a value of 9%. This means that when evaluating burns in adult patients, the entire head (including the face and scalp) accounts for 9% of the total body surface area.

The simplification provided by the Rule of Nines allows for rapid estimations of burn severity and helps guide treatment decisions and fluid resuscitation needs. As such, knowing that the head constitutes 9% is crucial for healthcare providers assessing burn victims. Understanding this distribution aids in effective communication about burn area and planning appropriate care without spending excessive time in calculations.