Total TBSA for the thorax when considering both anterior and posterior surfaces is what percentage?

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Multiple Choice

Total TBSA for the thorax when considering both anterior and posterior surfaces is what percentage?

In adults, burn TBSA uses the Rule of Nines. The anterior trunk (including the chest) accounts for 18%, and the posterior trunk (the back) also accounts for 18%. Adding them together gives 36% for the entire thorax (front plus back). The other numbers don’t fit because they reflect only one surface (18%), a region that’s smaller (9% for the head), or a total that isn’t consistent with the adult trunk plus other regions.

In adults, burn TBSA uses the Rule of Nines. The anterior trunk (including the chest) accounts for 18%, and the posterior trunk (the back) also accounts for 18%. Adding them together gives 36% for the entire thorax (front plus back). The other numbers don’t fit because they reflect only one surface (18%), a region that’s smaller (9% for the head), or a total that isn’t consistent with the adult trunk plus other regions.

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