Hernia Prevention Using Biologic Mesh and/or Small Bites: A Multispecialty 2 × 2 Factorial Randomized Controlled...

Area of Science:

• Abdominal surgery
• Hernia repair
• Surgical complications

Background:

• Ventral incisional hernias are common after abdominal operations.
• Previous trials showed synthetic mesh and small bites are effective.
• Concerns exist regarding synthetic mesh in contaminated cases and small bites in obese patients.

Purpose of the Study:

• To assess the efficacy of prophylactic biologic mesh and small bites in preventing major postoperative complications.
• To evaluate outcomes including ventral incisional hernias, surgical site infections, reoperations, and death.

Main Methods:

• A 2x2 factorial randomized trial involving high-risk patients (overweight/obese, smokers) undergoing abdominal operations with large midline incisions.
• Patients were randomized to receive either sublay biologic mesh or no mesh, and small or large bites for fascial closure.
• The primary outcome was major complications at 1 year postoperative, assessed using Fisher's exact test.

Main Results:

• 107 patients were randomized; 49% received mesh, 51% did not; 51% had small bites, 49% had large bites.
• At 1 year, no significant differences in major complications were observed between the mesh and no-mesh groups (21% vs. 16%, p=0.62).
• Similarly, no differences were found between small and large bites groups (18% vs. 19%, p=1.00).

Conclusions:

• Prophylactic biologic mesh and small bites did not demonstrate a benefit in reducing major postoperative complications in this trial.
• Further randomized trials are necessary to confirm these findings in high-risk patient populations.
• Widespread adoption of these prophylactic measures is not supported by current evidence.