Self-Supporting Wound Interface With Ventilated Hydrophobic Matrix
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Solution Overview
Problem
Existing wound dressings face challenges in achieving complete hydrophobic matrix coating on flexible mesh fabrics without obstructing mesh passages, leading to manufacturing difficulties and inadequate wound ventilation.
Innovation Solution
A self-supporting interface composed of a hydrophobic matrix with triblock elastomer, plasticizer, polyolefin, and hydrocolloid, applied in a thin layer on a temporary support with strategically made holes, allowing for cohesion and ventilation without a permanent substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hydrophobic matrix coating is applied to flexible mesh fabric to prevent direct contact with wound tissue, then non-adherence is improved, but the mesh passages become obstructed preventing exudate drainage
Solution Approach 1:
The patent uses a porous foam support structure with controlled porosity (30-90%) that maintains open passages for exudate drainage while providing a surface for the hydrophobic matrix coating. The porous structure ensures that the coating does not completely obstruct the mesh passages, resolving the contradiction between non-adherence and exudate drainage capability.
Solution Approach 2:
The hydrophobic matrix coating is applied selectively to specific regions of the foam support, particularly to the surface areas that contact the wound, while maintaining open porous structures in drainage pathways. This localized coating approach ensures non-adherence where needed while preserving exudate flow paths.
2Stability of the object's composition
If a definitive permeable substrate is used to support the hydrophobic matrix, then structural stability is improved, but manufacturing complexity increases due to coordination between substrate and coating
Solution Approach 1:
The patent creates a composite structure where the hydrophobic matrix coating is integrated with the porous foam support as a unified multi-layer system. The coating and substrate are manufactured together in a coordinated process, simplifying production while maintaining structural stability. The composite design ensures both components work together seamlessly without requiring complex post-assembly coordination.
3Object-affected harmful factors
If the hydrophobic matrix coating is made complete to avoid direct fiber contact with wound buds, then tissue protection is improved, but exudate passage is prevented
Solution Approach 1:
The porous foam support structure with controlled porosity (30-90%) provides a three-dimensional architecture that allows exudate to flow through internal passages while the external surface is coated with hydrophobic matrix. This porous structure enables simultaneous achievement of complete surface coverage for tissue protection and maintained drainage pathways for exudate removal.
Solution Approach 2:
The patent transitions from a two-dimensional flat coating problem to a three-dimensional porous structure solution. The hydrophobic matrix coating covers the external surface in one dimension while the porous foam provides internal volume for exudate flow in another dimension, effectively separating the tissue protection function from the drainage function in different spatial dimensions.
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 provides a non-adherent, ventilated, and self-supporting wound dressing that maintains cohesion for handling and application, preventing direct contact with wound tissues and ensuring effective exudate drainage.
Implementation Method 1
a sterile non-adherent interface, intended to be applied directly in contact with a wound, comprising a support made of flexible open mesh fabric whose threads are coated by a particular hydrophobic matrix gel
Implementation Method 2
the gel coating the threads so as to leave the meshes essentially unobstructed
Data Source
AI summary
The invention relates to a surgical wound interface obtained from a composition comprising a hydrophobic matrix including A parts of a triblock elastomer, B parts of a plasticizer, C parts of a polyolefin, and a hydrocolloid dispersed in a proportion between 0 and 30% of the weight of the hydrophobic matrix, with the following relationships: A = 100 300 < B < 500 10 < C < 50 9% < C/(A+C) < 33.5% 1.5% < C/(A + B + C) < 9% 83%> B/(A + B) > 75% the interface composition being arranged in a thin layer on a temporary protective support, distributed through holes being made in the interface, the interface being removed from its temporary protective support for use and having sufficient cohesion to be handled without support or reinforcement and applied to a wound.