The Use of Lightweight, Large-Pore Polypropylene Mesh Onlay in the Repair of Contaminated Abdominal Wall Defects: A Single Center Experience

Background: Most surgeons are reluctant to place synthetic mesh in contaminated abdominal wall repairs for fear of mesh infection. Biologic meshes are often used in this setting; however, these meshes lack the long-term durability of permanent, synthetic mesh. The authors present a single-center case series illustrating the safety and efficacy of the use of lightweight, large-pore polypropylene mesh in the repair of contaminated abdominal wall defects. Methods: A retrospective review of patients who underwent abdominal wall reconstruction with lightweight, large-pore polypropylene mesh at a single institution between March 2009 and June 2015 was performed. Patient demographics, complications, and hernia recurrence rates were reported. Results: Twenty patients were identified who underwent abdominal wall reconstruction with lightweight, large-pore polypropylene mesh in conjunction with a clean-contaminated (n=8), contaminated (n=10), or grossly infected (n=2) abdominal surgery. All meshes were placed overlying the anterior rectus sheath following fascial closure with either a unilateral or bilateral component separation. Thirteen patients had at least one risk factor for poor wound healing. Sixteen patients had uncomplicated post-operative courses. Of the four reported complications, two had seromas that resolved after needle aspiration, and two had superficial infections that resolved after a course of intravenous and oral antibiotics. Of note, the two patients categorized as infected cases maintained an uncomplicated course. There were no mesh infections, readmissions, mesh removals, or hernia recurrences. Conclusions: In contaminated surgical fields, abdominal wall repair with lightweight, large-pore polypropylene mesh may be performed with minimal wound-related morbidity and successful reestablishment of abdominal wall integrity.