Optimal Timing for Early Excision in a Deep Partial Thickness Porcine Burn Model

Area of Science:

• Burn wound healing
• Scarring research
• Surgical intervention timing

Background:

• Deep partial thickness burns often result in prolonged healing and significant scarring.
• Early eschar excision is a common treatment, but optimal timing remains debated.
• Porcine models offer a reliable platform for studying burn wound pathophysiology.

Purpose of the Study:

• To investigate the effect of different eschar excision timings on wound healing and scarring in deep partial thickness burns.
• To compare re-epithelialization rates, scar depth, and wound contraction following excision at 2, 4, and 7 days.
• To determine if early surgical intervention timing influences burn outcomes in a preclinical setting.

Main Methods:

• Deep partial thickness burns were created in a porcine model.
• Burns were randomly assigned for eschar excision at 2, 4, or 7 days post-injury.
• Wound healing was assessed via biopsies for re-epithelialization and digital imaging for contraction; scar depth was measured at day 28.

Main Results:

• No statistically significant differences were observed in wound re-epithelialization rates across all excision groups.
• Scar depth measurements were comparable between wounds excised at 2, 4, and 7 days (approximately 4.1 mm).
• Percentage of wound contraction at day 28 was similar among the excision timing groups (approximately 52.7%).

Conclusions:

• The timing of eschar excision, within the first 2 to 7 days, does not significantly affect re-epithelialization or scarring outcomes in deep partial thickness burns.
• These findings suggest flexibility in surgical timing for eschar removal in this burn model.
• Further clinical studies may be warranted to confirm these findings in human burn patients.