According to the rule of nines, how much body surface area do the head and neck represent for an adult, and for a child?

In the context of the rule of nines, which is a quick method used to estimate the total body surface area (TBSA) affected by burns, the head and neck represent 9% of the total body surface area for an adult. This percentage is typically standardized in adult patients and is commonly referenced in emergency medical scenarios to assist in burn assessment and management.

For children, however, the proportions differ due to their different body shapes and sizes. The head is proportionally larger in children compared to adults, which leads to the representation of the head and neck accounting for approximately 18% of the total body surface area in a pediatric patient. This distinction is crucial for accurate assessments during emergency situations where burn injuries occur, as it influences treatment decisions and fluid resuscitation needs based on the severity of the burns.

Understanding these percentages is vital for emergency responders, as incorrect estimates could lead to inadequate or excessive treatment protocols. Therefore, the percentage for adults (9%) and for children (18%) aligns with the established guidelines of the rule of nines, making this the correct choice.