What is the body surface area percentage burned for a 17-year-old female with a second degree circumferential burn on her left lower leg and foot?

To determine the body surface area percentage burned for a second-degree circumferential burn on the left lower leg and foot, it's important to understand the percentage distribution used in the Rule of Nines or the Lund and Browder chart.

In adults, the total body surface area (TBSA) is approximated differently for various anatomical regions. For a lower limb, including the foot, the general rule allocates about 18% of the body surface area to each leg (the entire lower limb) and 1% to the foot. However, since the scenario specifies a circumferential burn, it's critical to focus only on the affected region: the left lower leg and foot.

For a single lower leg, including the foot, the calculation typically breaks down as follows:

• The lower leg constitutes approximately 9% of the total body area.
• The foot constitutes about an additional 1% of the total area.

When combined, the total body surface area burned by a second-degree circumferential burn on just the left lower leg and foot results in a significant but specific portion of TBSA. Therefore, this gives a total of approximately 10%, not counting the full circumferential effect since we are focusing on the lower leg and foot burn