Which description best describes 4th degree frostbite?

Which description best describes 4th degree frostbite?

• A. Full thickness through dermis with muscle and bone involvement
• B. Involves only epidermis
• C. Immediate healing within days
• D. There will be blisters.

Answer: (A)

Frostbite severity is determined by how deeply the tissue has frozen and necrosed. Fourth-degree frostbite means the injury goes beyond the skin and deeper tissues, reaching muscle and bone. This depth indicates full-thickness tissue loss with nonviable tissue, often leading to gangrene and the need for surgical intervention such as debridement or amputation. Healing within days is unlikely because the damage is extensive, and signs like blisters are more typical of less severe frostbite degrees.

Frostbite severity is determined by how deeply the tissue has frozen and necrosed. Fourth-degree frostbite means the injury goes beyond the skin and deeper tissues, reaching muscle and bone. This depth indicates full-thickness tissue loss with nonviable tissue, often leading to gangrene and the need for surgical intervention such as debridement or amputation. Healing within days is unlikely because the damage is extensive, and signs like blisters are more typical of less severe frostbite degrees.