Designing Double-Layer Multimaterial Composite Patch Scaffold with Adhesion Resistance for Hernia Repair

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Surgical Innovation

Background:

• Hernia repair meshes often cause complications like adhesions due to poor mechanical strength and nonresorbability.
• Visceral adhesions are a significant complication following conventional patch repair procedures.

Purpose of the Study:

• To develop a novel, degradable hernia repair patch with anti-adhesive properties.
• To evaluate the physicochemical properties, biocompatibility, and efficacy of the composite patch in reducing adhesions.

Main Methods:

• Utilized 3D printing and electrospinning techniques to create a composite patch from polycaprolactone, polyvinyl alcohol, and soybean peptide (SP).
• Assessed mechanical properties (strength, elongation at break) and biocompatibility using in vitro cell culture (human umbilical vein endothelial cells).
• Evaluated in vivo performance in a rat abdominal wall defect model to assess adhesion formation and host integration.

Main Results:

• The developed patch demonstrated adequate mechanical strength (16 N cm⁻¹) and high elongation at break, outperforming commercial polypropylene meshes.
• In vitro studies showed good proliferation of human umbilical vein endothelial cells on the composite patch.
• In vivo experiments revealed excellent biocompatibility and significantly reduced adhesion formation in the rat model.

Conclusions:

• The novel composite patch effectively minimizes adhesion occurrence in hernia repair.
• The incorporation of soybean peptide (SP) further improves the patch's biocompatibility.
• This regenerative, biomimetic, biodegradable patch presents a new strategy for advanced hernia repair applications.