Prosthetic Heart Valve Delivery Coil Assembly
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Solution Overview
Problem
Current heart valve replacement technologies face challenges in delivering and deploying prosthetic heart valves effectively, particularly in achieving controlled expansion and positioning within the vasculature, with existing systems lacking in precision and stability during deployment.
Innovation Solution
A delivery system featuring a frame with a prosthetic valve component and a coil assembly that transitions between radially-collapsed and expanded positions, utilizing multiple helical coils to securely attach and release attachment members at the inflow and outflow ends, ensuring controlled deployment and minimizing backfolding risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single helical coil is used to attach the prosthesis to the delivery system, then the device complexity is reduced, but the reliability of controlled deployment and positioning is insufficient
Solution Approach 1:
The coil assembly is divided into multiple independent helical coils (first helical coil, second helical coil, and optionally third helical coil), each capable of receiving attachment members separately. This segmentation allows each coil to independently engage with attachment members at different locations, providing redundant control points and enhancing deployment reliability while maintaining manageable device complexity through modular design.
2Measurement precision
If multiple attachment members are engaged at a single location, then the stability during delivery is improved, but the precision of positioning and controlled release is reduced
Solution Approach 1:
The attachment members are distributed across multiple spatial dimensions by engaging them with different helical coils positioned at various locations along the prosthesis (inflow end, outflow end, and intermediate positions). This spatial distribution maintains stability through multiple engagement points while enabling precise positioning control, as each coil can be independently manipulated to control release timing and location.
3Reliability
If the helical coils are tightly wound to securely hold attachment members, then the reliability of attachment is improved, but the ease of release and deployment is worsened
Solution Approach 1:
The helical coils are designed with dynamic characteristics that allow them to transition between a tightly wound state for secure attachment and a relaxed state for easy release. The coils can be actively manipulated (rotated or compressed) to control the engagement and disengagement of attachment members, enabling reliable holding during delivery while facilitating controlled release at the target site through simple mechanical actions.
Data Source
AI summary
A delivery system for delivering a heart valve prosthesis includes a frame extending along a longitudinal axis between an inflow end and an outflow end. The frame includes a plurality of attachment members at one or more of the inflow end or the outflow end. The delivery system includes a coil assembly extending along a coil axis and attached to the plurality of attachment members. The coil assembly includes a first helical coil that receives a first attachment member of the plurality of attachment members. The coil assembly includes a second helical coil coaxial and intertwined with the first helical coil. The second helical coil receives a second attachment member of the plurality of attachment members. Methods of deploying a heart valve prosthesis at a treatment site are also provided.