A burn over the anterior and posterior surfaces of the left lower extremity involves what percentage of total body surface area according to the rule of nines?

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Multiple Choice

A burn over the anterior and posterior surfaces of the left lower extremity involves what percentage of total body surface area according to the rule of nines?

Explanation:
Rule of Nines estimates TBSA by body regions, with each leg totaling 18% (9% for the front/anterior surface and 9% for the back/posterior surface). A burn covering both the anterior and posterior surfaces of the left lower extremity is the entire left leg, which amounts to 18% of total body surface area. The other values don’t fit this region: 9% would be just one surface of a leg, 24% isn’t a single-leg region, and 36% would be both legs. Remember, this is the adult rule of nines; in children the distribution differs and a Lund and Browder chart is more accurate.

Rule of Nines estimates TBSA by body regions, with each leg totaling 18% (9% for the front/anterior surface and 9% for the back/posterior surface). A burn covering both the anterior and posterior surfaces of the left lower extremity is the entire left leg, which amounts to 18% of total body surface area. The other values don’t fit this region: 9% would be just one surface of a leg, 24% isn’t a single-leg region, and 36% would be both legs. Remember, this is the adult rule of nines; in children the distribution differs and a Lund and Browder chart is more accurate.

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