Retractable Wing Prosthesis for Pelvic Prolapse
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Solution Overview
Problem
Existing support parietal prostheses face challenges in easy insertion and positioning due to their two-dimensional extension and flexible tabs, which complicate surgical procedures and may cause adverse reactions such as inflammation and adhesions.
Innovation Solution
A support parietal prosthesis with a mesh made of materials like polypropylene, polyester, or PTFE, featuring a contact layer of polyurethane for reduced adhesion and inflammation, and retractable wings that fold into smaller dimensions for easier insertion, then expand for secure positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the prosthesis has a two-dimensional extension with tabs and wings for proper positioning, then the positioning accuracy is improved, but the ease of operation deteriorates due to difficulty in handling and reduced visibility
Solution Approach 1:
The prosthesis is folded into a compact configuration where the wings and tabs are nested within the main body structure, allowing the entire device to be inserted through a small surgical opening while maintaining the ability to unfold and position correctly at the implantation site
Solution Approach 2:
The prosthesis transitions from a static folded state during insertion to a dynamic unfolded state during positioning, allowing the wings and tabs to be deployed as needed for secure attachment while maintaining ease of insertion in the collapsed configuration
2Ease of operation
If the prosthesis is made flexible for easy insertion, then the ease of operation is improved, but the reliability deteriorates due to unwanted positions and configurations before correct positioning
Solution Approach 1:
The prosthesis is pre-folded into a specific configuration that guides its insertion path and prevents unwanted positioning, with the folded structure itself acting as a constraint that ensures correct orientation during insertion before deployment
3Strength
If polypropylene material is used for the mesh, then the mechanical strength is improved, but the object-affected harmful factors worsen due to inflammation and adhesion reactions
Solution Approach 1:
The prosthesis combines polypropylene mesh for structural strength with a polyurethane contact layer for tissue interface, creating a composite structure that maintains mechanical integrity while reducing adverse tissue reactions through the biocompatible outer layer
Data Source
Figure 1~2
Figure 3~4
AI summary
A parietal support prosthesis (1), in particular for pelvic prolapses, has a sheet body (2), defined by a mesh (3) and comprising a central portion (4) and at least a wing (5) extending from the central portion (4) substantially along an axis (A); the wing (5) is provided with a pocket (14) which, in an insertion operating position of the prosthesis (1), houses a length (20) of the wing (5), accordion-folded in a retracted configuration and extractable from the pocket (14) to assume, in a use operating position of the prosthesis (1), an extended configuration longitudinally elongated along the axis (A). The pocket is tubular, closed around the axis (A) and has open opposed ends, spaced apart along the axis (A); the wing (5) is provided with a grip portion (18) positioned at the free end and protruding from the pocket (14).