Which burn characteristic indicates a severe burn injury?

• A. Partial-thickness 5% TBSA
• B. Superficial 30% TBSA
• C. Superficial thickness 25% TBSA
• D. Full-thickness circumferential burns

Answer: (D)

Burn severity comes from how deep the injury goes and whether it encircles a body part. A full-thickness burn destroys all skin layers and often underlying tissues, leaving the area dry, leathery, and numb because the nerve endings are destroyed. When this deep damage forms a circumferential burn around a limb or the chest, the edema and eschar can constrict blood flow or limit chest expansion, leading to compromised circulation or breathing. That combination—complete tissue destruction with circumferential placement—poses the greatest risk and often requires urgent intervention. The other options describe shallower burns or noncircumferential involvement, which carry less immediate threat to perfusion or ventilation despite their severity.