Adjustable Occluder Disc Spacing for Patent Foramen Ovale Closure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing occluders for patent oval foramen lack adjustable length, leading to suboptimal occlusion in defects with varying septum overlap lengths, resulting in residual shunts and thrombosis risks.
Innovation Solution
An occluder system with adjustable spacing between two occluding disks, controlled by a tightening wire passing through a threading hole in a connecting member, allowing for customizable fit to different defect anatomies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed-length cylindrical slender waist is used in the occluder, then the structure is simple and easy to manufacture, but the occlusion effect is poor for defects with varying septum overlap lengths, resulting in residual shunts and thrombosis risks
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed-length cylindrical slender waist into an adjustable-length structure. The tightening wire can be pulled to dynamically adjust the length of the connecting portion between the two disks, allowing the occluder to adapt to different septum overlap lengths and improve occlusion reliability for various defect anatomies.
Solution Approach 2:
The patent implements parameter changes by enabling the length of the connecting portion to be adjusted after implantation. Through the tightening wire mechanism, the spacing between the two disks can be modified to match the specific anatomy of the defect, thereby optimizing the occlusion effect and eliminating residual shunts.
2Adaptability or versatility
If the occluder is designed for a specific septum overlap length range, then the device can be standardized for mass production, but it cannot effectively treat defects with longer or shorter overlapping lengths, leading to poor occlusion outcomes
Solution Approach 1:
The patent applies universality by designing a single occluder model that can treat defects with various septum overlap lengths. The adjustable tightening wire mechanism allows one standardized device to perform multiple functions by adapting to different anatomical configurations, eliminating the need for multiple custom-sized occluders.
Solution Approach 2:
The dynamic adjustment capability enables a single standardized occluder design to accommodate a wide range of defect sizes. The connecting portion length can be modified post-implantation to suit different patients' anatomical variations, achieving versatility without sacrificing manufacturing standardization.
3Reliability
If the occluder disks are positioned too far apart or too close together, then the device structure remains simple, but blood flow changes through the oval foramen, increasing thrombosis risk and requiring prolonged anticoagulant therapy
Solution Approach 1:
The patent implements parameter changes by allowing the spacing between the two disks to be adjusted after implantation. The tightening wire mechanism enables precise control of the connecting portion length, optimizing blood flow dynamics through the defect and reducing thrombosis risk by achieving proper disk positioning tailored to each patient's anatomy.
Data Source
AI summary
The present application provides an occluder, for use in occluding a defect in a vascular system. The occluder comprises a first occlusion disc, a second occlusion disc, and a tightening wire; the first occlusion disc and the second occlusion disc are used for covering different openings of a defect, respectively; a connector is provided on the first occlusion disc; the connector is provided with a wire passing hole; the tightening wire passes through the wire passing hole of the connector; two ends of the tightening wire pass through the second occlusion disc, and form an adjustment wire knot on the side of the second occlusion disc facing away from the first occlusion disc; the distance between the first occlusion disc and the second occlusion disc can be adjusted by the ends of the tightening wire. The present application also provides an occlusion system having the occluder.