Descriptive Analysis of Outcomes After Onlay Ventral Hernia Repair in Obese Patients

To determine outcomes after on lay large ventral hernia repair in obese patients.

Large ventral hernia repairs (VHR) in obese patients remain a challenge. Obesity is a risk factor for intraoperative difficulties and postoperative complications. Recurrence rates after VHR in obese patients range between 12-50% versus 10% in nonobese patients. While results of laparoscopic techniques in VHR compare favorably to open, outcomes in correlation with obesity, technique, and defect size are less understood.

A single surgeon's experience of 329 consecutive VHR between 2013-2022 was retrospectively reviewed. Inclusion criteria were obesity (BMI >30) and large hernia defects (>5 cm). A modified onlay technique was used which included component release and a lightweight monofilament polypropylene mesh. Primary outcome measures were hernia recurrence and wound complications.

A total of 56 patients met inclusion criteria. Patients were majority male (n=30, 54%), with a median age of 58.5 years (inter quartile range (IQR) 33-83), and median BMI of 36 kg/m² (IQR: 30-72). Median hernia defect size was 8 cm (IQR: 5-15). Twenty patients had undergone prior mesh repairs. Median follow-up was 52 months (IQR: 6 months-9 years). Two patients experienced recurrence (3.6%) and four experienced wound complications (four seromas, one panniculitis, 8.9%). No patients suffered flap ischemia or necrosis.

Obesity is a risk factor for poor outcomes after VHR. We developed a protocol for obese patients with large defects involving a modified onlay technique which demonstrates comparable results to other VHR techniques in obese patients.