The burst abdominal wound: a mechanical approach

Area of Science:

• Surgical technique
• Wound healing
• Biomechanical analysis

Background:

• Burst abdominal wounds, including evisceration and ventral hernias, result from mechanical failure of wound closure.
• Factors contributing to wound dehiscence include suture breakage, knot slippage, tissue tearing, and organ protrusion.
• Abdominal distension can increase wound length by up to 30%, stressing closure integrity.

Purpose of the Study:

• To analyze the biomechanical factors influencing abdominal wound strength.
• To determine optimal suture techniques to prevent wound disruption.
• To establish a quantifiable ratio for effective suture length in wound closure.

Main Methods:

• Measurement of abdominal girth and xiphoid-pubis distance during distension to assess wound lengthening.
• Analysis of suture length (SL) to wound length (WL) ratios in continuous wound closures.
• Evaluation of clinical evidence correlating SL:WL ratios and stitch intervals with wound disruption outcomes.

Main Results:

• A low suture length to wound length (SL:WL) ratio of 2:1 or less is associated with increased risk of deep wound disruption (evisceration, ventral hernia).
• Using non-absorbable continuous sutures with 1-cm intervals and an SL:WL ratio of 4:1 or greater effectively prevents suture cutting and subsequent wound disruption.
• Adequate suture length reserve is crucial to accommodate wound lengthening during abdominal distension, minimizing tension.

Conclusions:

• The suture length to wound length (SL:WL) ratio is a critical, controllable factor in surgical wound strength.
• An SL:WL ratio of 4:1 or more, combined with appropriate stitch intervals, is recommended for preventing burst abdominal wounds.
• Optimizing suture length and technique is essential for reducing the incidence of surgical site complications like evisceration and ventral hernias.