What does TBSA stand for in the Parkland formula context?

• A. Percentage of total body surface area burned
• B. Square meters of body surface area
• C. Depth of burn in millimeters
• D. Age-adjusted body surface area

Answer: (A)

TBSA in this context stands for the portion of the body's surface that's burned, expressed as a percentage. Using a percentage makes the Parkland formula scalable to different body sizes and burn extents, since fluid needs rise with both how much skin is damaged and how large the person is. In the Parkland formula, fluid resuscitation is estimated as 4 mL × body weight in kilograms × TBSA% burned, with half given in the first eight hours from injury and the remaining half over the next 16 hours. This concept isn’t about a surface area in square meters, burn depth, or any age-adjusted measure, which is why the other descriptions don’t fit.