Stented Valve Migration Prevention via Conduit Locking Members
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Solution Overview
Problem
Current pulmonary valve replacement methods, particularly stented valves, face challenges with proper positioning and migration within conduits due to blood flow forces, necessitating a solution for secure and stable implantation.
Innovation Solution
A vascular valve replacement system featuring a delivery catheter with a stented valve connected to an expandable support structure, including a plurality of protective struts and locking members on the conduit's inner wall, ensuring precise positioning and preventing migration by complementary mating portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a stented valve is delivered transvenously using a catheter-based delivery system, then the invasiveness of the procedure is reduced and recovery time is shortened, but the valve may migrate along the conduit due to blood flow forces
Solution Approach 1:
The locking members are pre-installed on the conduit at specific positions before valve implantation. These locking members create predetermined engagement points that will secure the valve in the correct position once deployed, preventing migration due to blood flow forces while maintaining the minimally invasive transvenous approach
Solution Approach 2:
The locking members act as intermediary elements between the conduit and the stented valve. They provide a mechanical interface that transfers and stabilizes the valve position within the conduit, preventing migration while allowing the valve to be delivered through a catheter-based system
2Adaptability or versatility
If the valve is made larger to accommodate growth in pediatric patients, then the valve can meet increasing energy demands, but the valve may become too small again as the child grows requiring replacement
Solution Approach 1:
The stented valve design allows for potential future expansion or adjustment. The stent structure can be engineered with expandable features that would allow the valve to grow with the patient, transforming a static implant into a dynamic solution that adapts to pediatric growth without requiring replacement
3Adaptability or versatility
If multiple surgical replacement procedures are performed on young patients, then the valve can be replaced as it becomes too small or fails, but the procedures become physically and emotionally taxing
Solution Approach 1:
The locking mechanism extracts the problematic element of valve migration, allowing the valve to be secured in one minimally invasive procedure rather than requiring multiple open surgeries. By removing the migration issue through the locking members, the need for repeated corrective procedures is eliminated
Data Source
AI summary
A system for treating a vascular condition includes a conduit having an inner wall and at least one locking member positioned within the inner wall of the conduit. The system also includes a stented valve positioned in contact with the locking member within the inner wall of the conduit. A method for treating a vascular condition includes inserting a conduit with a stented valve into a target region of a vessel, positioning a contact portion of the stented valve against a locking portion of the conduit and preventing migration of the stented valve within the conduit based on the positioning.