Which statement accurately reflects the burn threshold associated with hypothermia risk?

• A. Greater than 20% TBSA
• B. Greater than 10% TBSA
• C. Greater than 30% TBSA
• D. Exactly 20% TBSA

Answer: (A)

When the skin barrier is lost after a burn, the body loses heat and fluids rapidly. The bigger the burned area, the greater the heat loss and the harder it becomes to maintain core temperature. Burns covering more than about twenty percent of the total body surface area overwhelm the body’s ability to stay warm, so hypothermia risk becomes significant. That’s why the statement stating loss risk exceeds twenty percent TBSA is the best reflection of when hypothermia becomes a real concern. A threshold of greater than ten percent would understate the risk, while a threshold of greater than thirty percent would miss many at-risk patients, and exactly twenty percent doesn’t accurately capture the ongoing risk beyond that point.