Florida State Paramedic Practice Exam

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How much body surface area do the legs account for in the Rule of Nines for adults?

  1. 16

  2. 18

  3. 20

  4. 24

The correct answer is: 18

In the Rule of Nines, which is a method used to assess the total body surface area (TBSA) affected by burns in adults, the legs account for a significant portion of the body’s surface area. Specifically, each leg is allocated 18% of the total body surface area. Since there are two legs, this results in a total of 36% for both legs combined. However, when referring to how much body surface area each individual leg represents, the correct answer is 18% per leg. This system provides a quick way for emergency personnel to estimate the extent of burns and to make critical decisions regarding treatment and fluid resuscitation.

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