What is the percentage of the body associated with the head in the Rule of Nines?

In the Rule of Nines, which is a method used to estimate the total body surface area (TBSA) affected by burns, the head is allocated a specific percentage. For adults, the head and neck account for 9% of the total body surface area. This classification is useful for quickly assessing the severity of burns and determining treatment needs, including fluid resuscitation.

The percentages assigned to different body regions in the Rule of Nines provide a simple way to communicate and assess burn injuries in medical emergencies. The head's allocation of 9% means that, in cases of burn injuries affecting the head, healthcare providers can quickly determine the appropriate interventions based on this estimate. The other percentages representing larger body parts, such as the legs or torso, differ significantly because they cover more surface area than the head.