What is the TBSA percentage for an adult back?

The total body surface area (TBSA) percentage for an adult back is considered to be 18%. This value is derived from the "Rule of Nines," a method used in the assessment of burns to estimate the percentage of the body that has been burned. According to this rule, the back of an adult constitutes 18% of the total body surface area.

In the context of calculating burns, understanding TBSA percentages is crucial for determining fluid resuscitation needs, as well as for understanding the severity of burns and potential critical care requirements. The front side of the torso, which includes the chest and abdomen, also accounts for 18%, and when combined with the back percentage, it underscores the significant portion of TBSA that can be affected in an injury scenario.