Deep and Superficial Debridement Techniques in Lower Extremity Split-thickness Skin Grafting

Area of Science:

• Wound Healing and Tissue Regeneration
• Surgical Techniques
• Dermatology

Background:

• Nonhealing lower extremity wounds often necessitate split-thickness skin grafts (STSG) for closure.
• Effective debridement of nonviable tissue is crucial prior to STSG.
• The optimal debridement depth for STSG outcomes remains an area of investigation.

Purpose of the Study:

• To compare the impact of superficial versus deep debridement (DD) on STSG outcomes in chronic lower extremity wounds.
• To evaluate graft failure rates based on debridement depth.
• To analyze the influence of wound microbiology on the effectiveness of different debridement techniques.

Main Methods:

• Retrospective review of chronic, atraumatic lower extremity wounds undergoing STSG between December 2014 and December 2022.
• Classification of debridement into superficial and deep (to white tissue layer).
• Comparison of graft failure rates between superficial and deep debridement groups, with subanalysis for culture-positive and culture-negative wounds.

Main Results:

• Deep debridement (DD) was associated with significantly lower graft failure rates (10.5%) compared to superficial debridement (22.2%).
• Multivariate analysis confirmed DD as an independent predictor of reduced graft failure (OR: 0.0; CI, 0.0-0.8).
• The benefit of DD was significant in culture-positive wounds (7.6% vs. 22.1%) but not in culture-negative wounds (13.6% vs. 22.2%).

Conclusions:

• Deep debridement is a superior technique for preparing chronic lower extremity wounds for STSG.
• The DD technique demonstrates improved outcomes, particularly in chronic, culture-positive wounds requiring STSG.
• This finding supports the adoption of DD for optimizing STSG success in specific wound populations.