Bioresorbable Prosthetic Fabric with Water-Soluble Barb Coating
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Solution Overview
Problem
Prosthetic fabrics with barbs used for wall reinforcement, especially in coelioscopic surgery, face challenges such as entanglement and damage during transportation through small-diameter trocars due to the lack of protection for the barbs, leading to deployment issues at the implantation site.
Innovation Solution
A prosthetic fabric with barbs coated in a water-soluble material and covered on the opposite face with a bioresorbable microporous layer, which prevents barb entanglement and damage during transport, allowing easy deployment and subsequent tissue attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the prosthesis is conveyed through a small-diameter trocar channel, then the incision size is minimized, but the barbs become entangled and damaged during transportation
Solution Approach 1:
The prosthesis is compressed into a compact bundled configuration before insertion through the trocar. This preliminary compression action allows the prosthesis to pass through the small-diameter channel without barb entanglement, while the barbs remain protected within the bundled structure until deployment at the implantation site
Solution Approach 2:
The prosthesis is nested within itself in a bundled configuration during transportation through the trocar channel. The barbs are contained within the folded fabric layers, protecting them from damage while maintaining a compact size suitable for small incisions
2Ease of operation
If the prosthesis is wound around on itself for insertion, then it can be conveyed through the trocar, but the barbs become entangled in the fabric body
Solution Approach 1:
A protective coating is applied to the fabric surface, creating a thin film barrier that prevents barbs from penetrating and becoming entangled in the fabric body during the winding and insertion process, while still allowing the prosthesis to be compressed into a compact form for trocar insertion
3Adaptability or versatility
If the barbs are exposed without protection, then they can attach to tissue, but they are damaged during transportation and unrolling
Solution Approach 1:
The prosthesis is prepared in a compressed bundled state with barbs protected within the fabric structure before insertion. This preliminary configuration protects the barbs during transportation through the trocar and during unrolling at the implantation site, ensuring they remain functional for tissue attachment
Solution Approach 2:
The barbs are nested within the folded fabric layers during transportation, protecting them from damage. Upon deployment at the implantation site, the prosthesis is unrolled and the barbs are exposed to perform their tissue attachment function
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures the barbs remain intact and functional at the implantation site, facilitating easy deployment and attachment, while the microporous layer prevents premature tissue growth and adhesions, enhancing surgical efficiency and patient recovery.
Implementation Method 1
covered with a coating made of a water-soluble material
Implementation Method 2
the outer surface of said layer being impenetrable by said barbs
Data Source
AI summary
The present invention relates to a prosthetic fabric (5) comprising an arrangement (2) of yarns that define at least first and second opposite faces (2a, 2b) for said fabric, said fabric comprising on at least said first face, one or more barbs (3) that protrude outwards relative to said first face, said fabric being covered, at least partly, on said second face with a microporous layer made of a bioresorbable material, said barbs being covered with a coating made of a water-soluble material. The invention also relates to a process for obtaining such a fabric and to prostheses obtained from such a fabric.