Skin coverage in frostbite injuries: experimental study.

Area of Science:

• Reconstructive surgery
• Tissue engineering
• Trauma management

Background:

• Dermal grafting is a common treatment for cold injury tissue defects.
• Local flaps are often displaced by grafting in secondary wound healing.
• The efficacy of different treatments for frostbite defects requires further investigation.

Purpose of the Study:

• To compare the effectiveness of guided wound healing, dermal grafts, and cutaneous flaps in treating frostbite defects.
• To evaluate surface area lacking cutaneous cover at day 7 (SCp7) and healing time (TC).

Main Methods:

• A cold injury model was used to create dorsal defects in rabbit legs.
• Animals were divided into three groups: secondary intention healing, dermal graft, and flap coverage.
• SCp7 and TC were analyzed for each treatment group.

Main Results:

• Flap coverage resulted in the smallest SCp7 (62mm2) and shortest healing time (11.6 days).
• Dermal grafts showed a larger SCp7 (130mm2) and longer healing time (15.9 days).
• Secondary intention healing had the largest SCp7 (225mm2) and longest healing time (20.1 days).

Conclusions:

• Cutaneous flaps provide superior skin cover in both quality and quantity compared to grafts.
• The independent vascular supply of flaps makes them less dependent on recipient bed characteristics.
• Early treatment of frostbite injuries with flaps is feasible due to rapid tissue damage assessment.