3D Hernia Prosthesis with Bifurcated Edges for Inguinal Coverage
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Solution Overview
Problem
Current implantable mesh patches for hernia repair lack specificity for direct and indirect inguinal hernia spaces, often requiring larger coverage areas and tailored shapes to effectively address both types of hernias during minimally invasive surgeries.
Innovation Solution
Design of unilateral and bilateral implantable prostheses with preformed three-dimensional shapes, featuring convex and concave edges, bifurcated portions, and barbs, specifically tailored to conform to inguinal anatomy, providing preferential coverage for direct and indirect hernia defects and allowing for self-deployment during surgical insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If standard three-dimensional mesh patches are used to cover the myopectineal orifice, then general hernia coverage is achieved, but specific coverage for direct and indirect hernia spaces is insufficient
Solution Approach 1:
The prosthesis incorporates localized anatomical features including a convex lateral outer edge for indirect hernia coverage, a concave medial outer edge for direct hernia coverage, and a superior outer edge with concave portions to accommodate vascular structures. These localized geometric variations enable specific targeting of different hernia spaces while maintaining a unified prosthesis structure.
Solution Approach 2:
The prosthesis is divided into functionally distinct regions: an upper portion with a spherical cap for lateral/indirect hernia coverage, a lower portion with wavy-shaped walls for medial/direct hernia coverage, and an interior edge with bifurcated portions to separate coverage zones. This segmentation allows each region to address specific hernia types effectively.
2Shape
If flat sheet mesh is used for hernia repair, then manufacturing simplicity is maintained, but anatomical conformity and coverage effectiveness are reduced
Solution Approach 1:
The prosthesis transitions from a two-dimensional flat sheet to a three-dimensional structure with pronounced curvature and depth. The spherical cap, wavy-shaped walls, and convex/concave edges create vertical dimensionality that enables the prosthesis to conform to the complex anatomy of the inguinal region, providing superior anatomical fit and hernia space coverage.
3Reliability
If generic mesh patches are used, then device simplicity is maintained, but fixation stability and migration resistance are insufficient
Solution Approach 1:
The prosthesis employs curved geometric features including a spherical cap in the upper portion and wavy-shaped walls in the lower portion. These curved surfaces provide superior contact area and mechanical interlocking with the surrounding anatomical structures, enhancing fixation stability and reducing migration risk compared to flat mesh designs.
Solution Approach 2:
The prosthesis features asymmetric geometric characteristics with convex and concave edges positioned to match the asymmetric anatomy of the inguinal region. The convex lateral outer edge and concave medial outer edge create directional engagement with surrounding tissues, improving stability and preventing migration in the specific orientation required for hernia repair.
Data Source
AI summary
An implantable prosthesis for hernia repair is designed for minimally invasive, robotic, or laparoscopic surgery. Various embodiments of the implantable prosthesis are tailored for inguinal hernia repair, including direct, indirect, and bilateral hernia defects, as well as for femoral hernia repair.