Pre-Formed Parastomal Mesh With Bowel Clearance Channel
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Solution Overview
Problem
Existing mesh repair techniques for parastomal hernias during ostomy treatment face challenges such as high recurrence rates, bowel obstruction, mesh migration, and increased infection risk, particularly in sublay and intraperitoneal placements.
Innovation Solution
A pre-molded mesh with a unique shape featuring a raised central region and clearance channel is designed to provide support to the abdominal wall, ensuring adequate overlap with the fascia and preventing bowel compression, while allowing the bowel to pass without obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solid piece of mesh is used in Sugarbaker repair, then hernia recurrence is reduced, but bowel obstruction risk increases due to dense adhesions
Solution Approach 1:
The mesh is segmented into multiple functional zones: a solid peripheral portion for hernia repair and reinforcement, and a central keyhole opening for bowel passage. This segmentation allows the mesh to provide structural support while creating a dedicated channel that prevents bowel adhesion and obstruction, resolving the contradiction between hernia recurrence prevention and bowel obstruction risk
Solution Approach 2:
Different regions of the mesh have different properties: the peripheral solid mesh provides high structural integrity for hernia repair, while the central keyhole region provides a clear passage for bowel. This local differentiation allows the same mesh structure to simultaneously achieve reliable hernia repair and prevent bowel obstruction
2Object-affected harmful factors
If the keyhole opening is made larger, then bowel obstruction is prevented, but hernia recurrence risk increases
Solution Approach 1:
The mesh structure segments the functional requirements by creating a defined keyhole opening surrounded by solid mesh. The opening size is optimized to provide adequate bowel passage while the surrounding solid mesh maintains structural integrity for hernia repair, allowing both bowel obstruction prevention and hernia recurrence reduction to be achieved simultaneously
Solution Approach 2:
The mesh parameters (keyhole size, mesh density, material composition) are specifically optimized to balance two competing requirements: the keyhole is sized large enough to prevent bowel obstruction but small enough to maintain structural support for hernia repair, resolving the contradiction between preventing bowel obstruction and reducing hernia recurrence
3Object-affected harmful factors
If mesh is placed in sublay position, then wound infection risk is reduced, but surgical technique complexity increases to accommodate stoma
Solution Approach 1:
The mesh is pre-formed with the keyhole opening and appropriate shape before surgery. This preliminary preparation eliminates the need for complex intraoperative shaping and adaptation, allowing straightforward sublay placement that maintains the sterile field and reduces infection risk while simplifying the surgical technique
Solution Approach 2:
The pre-formed mesh design with integrated keyhole and appropriate dimensions allows the mesh to automatically accommodate the stoma and hernia defect without requiring complex surgical manipulation or customization, reducing both surgical complexity and infection risk
Data Source
AI summary
A mesh for repair/prevention of a parastomal hernia during ostomy treatment is disclosed. More specifically, a pre-molded mesh having a unique shape to provide support to the abdominal wall adjacent a stoma formed during an ostomy procedure to prevent/repair formation of a parastomal hernia is disclosed which also provides a clearance channel through which the bowel can pass in a manner that prevents collapse or obstruction of the exposed segment of the bowel.