Peer-reviewed veterinary case report
Best mesh weight for onlay repair varies by ventral hernia type
By Sørensen CB et al.·2025·Department of Surgery·View original on Europe PMC →
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Original publication title: The optimal mesh weight in onlay repair depends on ventral hernia type: a nationwide register-based cohort study.
Plain-English summary
This study looked at how the weight of surgical mesh used in repairing ventral hernias (a type of abdominal wall hernia) affects the chances of the hernia coming back after surgery. Researchers analyzed data from over 10,000 patients who had either incisional hernias (which occur at the site of a previous surgery) or primary ventral hernias (which occur without prior surgery). They found that for incisional hernias, using mesh that weighs between 50 and 65 grams per square meter led to the lowest rate of needing another surgery due to recurrence. For primary ventral hernias, using mesh that weighs more than 35 grams per square meter also resulted in a lower risk of the hernia returning. Overall, the findings suggest that choosing the right mesh weight can help reduce the chances of hernias coming back after surgery.
Abstract
<h4>Purpose</h4>The aim was to investigate which mesh weight interval was associated with the lowest risk of recurrence for patients with incisional and primary ventral hernias undergoing onlay repair.<h4>Methods</h4>Prospectively collected data were obtained from the Danish Ventral Hernia Database, which was linked to the Danish National Patient Registry and the Danish Civil Registration System to ensure complete follow-up of included patients. Data were gathered from January 1, 2007, to April 18, 2024. Multiple exploratory Cox regressions were performed to determine which mesh weight interval was associated with the lowest risk of reoperation for recurrence.<h4>Results</h4>In total, 10,174 patients were included in the study; of these, 1,966 had incisional hernias and 8,208 had primary ventral hernias, which were considered separately in two different cohorts. For patients with incisional hernias, the mesh weight interval of 50-65 g/m<sup>2</sup> resulted in the lowest reoperation rate compared with 16-49 g/m<sup>2</sup> (HR = 1.75 (1.06-2.89), p = 0.028) and with 66-110 g/m<sup>2</sup> (HR = 2.05 (1.19-3.54), p = 0.009). For patients with primary ventral hernias, meshes weighing > 35 g/m<sup>2</sup> resulted in the lowest risk of reoperation for recurrence compared with < 35 g/m<sup>2</sup> (HR = 2.15 (1.38-3.35), p < 0.001).<h4>Conclusion</h4>For open onlay ventral hernia repair, mesh weighing 50-65 g/m<sup>2</sup> resulted in the lowest risk of recurrence for incisional hernias, while mesh weighing > 35 g/m<sup>2</sup> resulted in the lowest risk of recurrence for primary ventral hernias.
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Search related cases →Original publication on Europe PMC: https://europepmc.org/article/MED/41385107