Hernia Implant Bio-Adhesive Fixation
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Solution Overview
Problem
Current textile implants for hernia repair face issues with postoperative pain, lengthy suturing, inadequate adhesive power, and biocompatibility concerns due to existing surgical adhesives, and suffer from adhesive loss and migration due to insufficient adhesive strength and activation issues.
Innovation Solution
A textile implant with a bio-adhesive composition that is hydrosoluble and absorbable, containing less than 4% plasticizer, which activates in a moist medium, providing sufficient adhesive power for durable fixation and allowing fibrosis to secure the implant without the need for clips, while being easily handled and deployed without sticking prematurely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If surgical adhesives based on cyanoacrylate are used to achieve high adhesive power, then adhesive strength is improved, but biocompatibility deteriorates due to necrosis, burning, and toxic substance release
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive by using a copolymer of vinyl pyrrolidone and acrylic acid with specific ratios (70-90% vinyl pyrrolidone and 10-30% acrylic acid), replacing cyanoacrylate with a biocompatible alternative that provides sufficient adhesive strength without causing tissue necrosis or burning
Solution Approach 2:
The patent uses a composite adhesive system combining vinyl pyrrolidone and acrylic acid polymers with specific functional properties (adhesive power, viscosity, plasticization) to achieve both high adhesive strength and biocompatibility, rather than relying on a single polymer type
2Ease of operation
If the textile implant is rolled up for insertion by trocar, then ease of operation is improved, but adhesive loss increases as adhesive remains on both faces and sticks to the trocar wall
Solution Approach 1:
The patent applies adhesive only to specific local areas (marginal zones or specific patterns) of the textile implant rather than uniformly across the entire surface, which reduces total adhesive quantity and prevents excessive adhesive from sticking to the trocar wall during insertion
Solution Approach 2:
The patent uses a controlled amount of adhesive applied partially to the textile surface rather than complete coverage, which is sufficient for achieving durable fixation while minimizing adhesive loss during handling and insertion
3Strength
If clips are used to fasten the textile piece to guarantee durable fastening, then fixation strength is improved, but postoperative pain increases due to nerve ending pinching
Solution Approach 1:
The patent replaces the mechanical fastening system (clips that physically clamp and may pinch tissue) with a chemical adhesive system based on vinyl pyrrolidone-acrylic acid copolymer that bonds tissue through molecular adhesion, eliminating mechanical pinching of nerve endings while providing durable fixation
4Reliability
If suturing by means of clips is used to ensure durable fastening, then fixation reliability is improved, but operation time increases making the procedure lengthy and tedious
Solution Approach 1:
The patent replaces the complex mechanical suturing and clipping procedure with a simpler adhesive application process, significantly reducing operation time while maintaining reliable fixation through the biocompatible polymer adhesive system
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 implant achieves effective and long-term fixation of the textile piece on human tissue, reducing foreign agents and complications, with improved handling and deployment characteristics, and is well-tolerated by the organism, as demonstrated by successful animal testing.
Implementation Method 1
a textile piece having a first face that is totally or partially covered in a bio-adhesive composition that is hydrosoluble and absorbable, and that includes at least one bio-adhesive polymer that is hydrosoluble and absorbable with an adhesive function that is activatable on coming into contact with the moist medium of the tissue
Implementation Method 2
bio-adhesive composition that is hydrosoluble and absorbable
Implementation Method 3
bio-adhesive composition that is hydrosoluble and absorbable
Data Source
AI summary
A textile implant, in particular for repairing hernias, the implant including a textile piece having a first face completely or partially covered in a bio-adhesive composition that is hydrosoluble and absorbable and that includes at least one bioadhesive polymer that is hydrosoluble and absorbable, with the adhesive function thereof being activatable in a moist or wet medium. The bio-adhesive composition includes less than 4% by weight of plasticizer.