Inguinal Hernia Prosthesis Coating for Tangle-Free Trocar Delivery
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Solution Overview
Problem
Existing prostheses for inguinal hernia repair face challenges in being delivered and deployed through small trocars due to barbs catching in the textile, complicating orientation and positioning in the oblique inguinal region.
Innovation Solution
A biocompatible openworked textile with barbs on one face and a non-porous coating on the opposite face that is hydrosoluble at 37°C but not at 25°C, allowing easy deployment and orientation by hydrating at ambient temperature for passage through a trocar and dissolving at body temperature for fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If barbs are added to the prosthesis to enable self-fixation in biological tissues, then fixation capability is improved, but the barbs catch in the textile during delivery through trocars, complicating deployment
Solution Approach 1:
A non-porous coating is applied to the second face of the textile to serve as an intermediary layer that prevents barbs from catching in the textile during delivery through the trocar, while allowing the barbs to function properly for fixation in biological tissues once deployed
Solution Approach 2:
The coating's hydrosolubility parameter is utilized - it is non-hydrosoluble at 25°C during delivery and storage, but becomes hydrosoluble at 37°C (body temperature) after implantation, allowing it to dissolve and be eliminated without interfering with long-term fixation
2Object-affected harmful factors
If the prosthesis is delivered through small trocars to minimize incision size, then patient trauma is reduced, but the prosthesis becomes difficult to deploy and orient correctly in the oblique inguinal region
Solution Approach 1:
The non-porous coating acts as a mediator that reduces friction and entanglement between the prosthesis and trocar walls during delivery, enabling smooth passage through small trocars and facilitating easier deployment and orientation at the implantation site
Solution Approach 2:
The temperature-dependent hydrosolubility change allows the coating to provide protection during delivery at ambient temperature, then dissolve at body temperature to minimize foreign material presence while maintaining proper anatomical alignment
3Ease of operation
If a non-porous coating is applied to prevent barb entanglement, then deployment is facilitated, but foreign material is introduced into the patient's body
Solution Approach 1:
The coating is designed with temperature-dependent hydrosolubility - non-soluble at 25°C during delivery and soluble at 37°C in the body - allowing it to perform its protective function during deployment then automatically dissolve and be eliminated, minimizing long-term foreign material presence
Solution Approach 2:
The non-porous coating serves as a temporary protective layer that is discarded (dissolved and eliminated) after fulfilling its purpose during delivery and initial deployment, with no long-term retention in the patient's body
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
Facilitates easy delivery and deployment of the prosthesis without entanglement, minimizing foreign material introduction and ensuring proper anatomical alignment.
Implementation Method 1
a non-porous coating consisting in a material that is hydrosoluble at 37° C. and non-hydrosoluble at a temperature of less than or equal to 25° C.
Implementation Method 2
hydrosoluble at 37° C. and non-hydrosoluble at a temperature of less than or equal to 25° C.
Data Source
AI summary
The present invention relates to a prosthesis (1) for the repair of an inguinal hernia, which prosthesis (1) is intended to be implanted by a posterior or open laparoscopic route and comprises: an openworked textile (2) made of biocompatible material, comprising a first face (2a) intended to be placed facing the biological tissues of the inguinal region, and a second face (2b) arranged opposite said first face and intended to be placed facing the peritoneum, said first face being provided with fastening means that are able to fix said textile in said biological tissues of the inguinal region, characterized in that at least a part of said second face (2b) is covered with a non-porous coating (7) composed of a material that is hydrosoluble at 37° C. and non-hydrosoluble at 25° C. The invention also relates to a method for producing such a prosthesis.