What percentage of the body surface area does the abdomen and back together account for in adults/adolescents?

In adults and adolescents, the abdomen and back together account for 18% of the total body surface area. This percentage is based on the Lund and Browder chart, which is commonly used in assessing burns and injury extent.

When evaluating body surface area, the "Rule of Nines" is a simplified method often used, where the body is divided into sections that represent approximately 9% of total body surface area for easy calculation. According to this rule, the torso and back combined fall into a category that accurately reflects the 18% statistic. This understanding is crucial for emergency responders when determining the severity of injuries and the appropriate level of care needed.