Parastomal Prosthesis Channel With Adhesion Barrier for Bowel Protection
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Solution Overview
Problem
Existing implantable prostheses for soft tissue and muscle wall defects, such as parastomal hernias, often lead to adhesions between the prosthesis and the bowel due to lack of adhesion resistance, and can cause bowel compression or obstruction.
Innovation Solution
An implantable prosthesis with a biologically compatible material featuring a preformed channel and an adhesion-resistant barrier, where the channel receives a lateralized bowel and the barrier isolates it from the tissue-infiltratable surface, reducing adhesions and ensuring a snug fit without compressing the bowel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the prosthesis uses a tissue-infiltratable surface to promote tissue integration, then tissue ingrowth is improved, but adhesions between the prosthesis and bowel occur
Solution Approach 1:
The prosthesis applies different surface properties to different regions: the first surface has tissue-infiltratable properties to promote integration with abdominal wall tissue, while the second surface has adhesion-resistant properties to prevent adhesions with the bowel. This local differentiation of surface characteristics resolves the contradiction between promoting tissue integration and preventing harmful adhesions.
Solution Approach 2:
The prosthesis is divided into distinct surfaces with different functional characteristics. The first surface promotes tissue ingrowth while the second surface prevents adhesions, segmenting the prosthesis into zones with specialized functions to simultaneously achieve tissue integration and adhesion prevention.
2Reliability
If the prosthesis provides a snug fit for the bowel to prevent hernia recurrence, then repair reliability is improved, but bowel compression and obstruction may occur
Solution Approach 1:
The prosthesis incorporates a flexible, conformable structure that can adapt to the bowel's shape and movement. The material properties allow the prosthesis to provide a snug fit for hernia repair while maintaining flexibility to prevent compression and obstruction of the bowel.
3Strength
If the prosthesis uses adhesive materials to secure the prosthesis in place, then fixation strength is improved, but adhesion to bowel tissue occurs
Solution Approach 1:
The prosthesis uses adhesion-resistant material specifically on the second surface that contacts the bowel, while allowing adhesive fixation on the first surface that contacts the abdominal wall tissue. This localized application of different material properties enables secure fixation without harmful adhesion to the bowel.
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 prosthesis effectively prevents adhesions and bowel compression, promoting tissue ingrowth while maintaining bowel integrity, thus enhancing the success of hernia repair procedures.
Implementation Method 1
The second surface is adhesion resistant. The adhesion resistant barrier is located on the inner side of the channel to isolate the portion of the lateralized bowel from the first surface.
Implementation Method 2
Tissue integration with the fabric, such as tissue ingrowth into and/or along the mesh fabric, eventually completes the repair.
Data Source
AI summary
An implantable prosthesis for preventing, reinforcing and/or mending an anatomical defect, including a parastomal hernia which may occur following the formation of a stoma or ostomy opening, such as formed in conjunction with an ileostomy or colostomy. The prosthesis may include a body of biocompatible material having a preformed three-dimensional channel configured to receive a portion of a lateralized bowel formed in conjunction with a parastomal hernia repair or ostomy creation. An adhesion resistant barrier may be located on an inner side of the channel to isolate the portion of the lateralized bowel from a tissue infiltratable surface of the body to reduce or eliminate potential adhesions between the body and the lateralized bowel. A portion of the channel may include a flared segment extending inwardly from the outer periphery to reduce pressure on the portion of the lateralized bowel at the open end of the channel.