In adults, what percent of total body surface area does the perineum contribute?

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Multiple Choice

In adults, what percent of total body surface area does the perineum contribute?

Explanation:
In adults, TBSA is estimated using the Rule of Nines. The external genitalia region, which includes the perineum, is assigned 1% of total body surface area. So the perineum contributes 1% of TBSA. The remaining regions add up to the rest (head 9%, each arm 9%, anterior trunk 18%, posterior trunk 18%, each leg 18%), totaling 100%. Note that pediatric distributions differ (Lund-Browder chart), but for adults the perineum is 1%.

In adults, TBSA is estimated using the Rule of Nines. The external genitalia region, which includes the perineum, is assigned 1% of total body surface area. So the perineum contributes 1% of TBSA. The remaining regions add up to the rest (head 9%, each arm 9%, anterior trunk 18%, posterior trunk 18%, each leg 18%), totaling 100%. Note that pediatric distributions differ (Lund-Browder chart), but for adults the perineum is 1%.

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