Bioabsorbable Anti-adhesion Membrane with Surface Projections
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Solution Overview
Problem
Conventional anti-adhesion membranes are prone to breaking when rolled into thin tubes due to brittleness and lack of stiffness, making them difficult to handle and introduce through a trocar without damage.
Innovation Solution
An anti-adhesion membrane with a bioabsorbable film featuring projections and recesses, such as those made from gelatin or hyaluronic acid and carboxymethyl cellulose, which provides flexibility and moderate stiffness, allowing it to be rolled into a thin tube and passed through a trocar without damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the thickness of anti-adhesion membranes is reduced to provide flexibility, then the membrane can be rolled up more easily, but the strength and stiffness are reduced causing the membrane to wrinkle and deform
Solution Approach 1:
The patent applies this principle by using a thin film structure (50-200 μm thickness) made of bioabsorbable materials that inherently provides flexibility while maintaining sufficient strength through material selection and surface modification rather than increasing thickness
Solution Approach 2:
The patent changes physical parameters including film thickness (50-200 μm), surface energy (30-70 mN/m), and surface roughness (Ra: 0.1-10 μm) to achieve the optimal balance between flexibility and strength, allowing the membrane to be rolled without damage while maintaining structural integrity
2Adaptability or versatility
If the thickness of anti-adhesion membranes is reduced to provide flexibility, then the membrane can be rolled up more easily, but the membrane becomes difficult to handle due to wrinkling and static electricity
Solution Approach 1:
The patent optimizes surface energy to 30-70 mN/m and surface roughness (Ra: 0.1-10 μm) to reduce static electricity accumulation and wrinkling, making thin flexible membranes easier to handle during surgical procedures
Solution Approach 2:
The patent replaces mechanical thickness control with surface property control (surface energy and roughness) to manage static electricity and handling characteristics, enabling thin films to be handled as easily as thicker membranes
3Ease of operation
If conventional anti-adhesion membranes are rolled up into thin tubes, then they can be introduced through a trocar, but the membranes break due to brittleness and lack of flexibility
Solution Approach 1:
The patent uses flexible thin films (50-200 μm) that can be rolled into compact tubes for trocar introduction while maintaining sufficient strength to prevent breaking during insertion and deployment in the body
Solution Approach 2:
The patent optimizes the combination of thickness (50-200 μm), surface energy (30-70 mN/m), and surface roughness (Ra: 0.1-10 μm) to achieve the right balance between flexibility for rolling and strength for preventing breakage during surgical procedures
Data Source
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AI summary
The present invention provides anti-adhesion membranes that can be readily rolled up into thin tubes and introduced into the body through a trocar without damage, and additionally have moderate stiffness, and therefore are easy to handle. The present invention provides an anti-adhesion membrane including a film made of a bioabsorbable material, the film being provided with projections and recesses.