Spiral Embolic Protection Device Thrombus Interception
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Solution Overview
Problem
Existing embolic protection devices face challenges in manufacturing complexity, blood flow disturbance, and difficulty in intercepting smaller thrombi, particularly in environments with strong blood vessel walls.
Innovation Solution
An embolic protection device using a flat superelastic metal wire formed into a coaxial multi-turn spiral or vortex shape, deployable through a tubular object, with a retract wire for immediate withdrawal and a fixing section to secure to the blood vessel wall, designed to intercept thrombi effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single wire is used to construct a vascular embolic protection device, then device complexity is reduced, but manufacturing precision and structural stability deteriorate
Solution Approach 1:
The single wire is segmented into multiple turns forming a spiral structure, where each turn acts as an independent intercepting element. This segmentation allows the wire to maintain structural stability while remaining manufacturable as a single piece, resolving the contradiction between device simplicity and manufacturing precision.
Solution Approach 2:
The wire is formed into a spiral curvature pattern rather than a straight line. This curvature provides structural stability for thrombus interception while allowing the wire to be manufactured as a single piece and deployed through catheter guidance, balancing device complexity with manufacturing precision.
2Reliability
If the gap of the spiral line is made small to intercept thrombi, then thrombus interception capability is improved, but blood flow is reduced
Solution Approach 1:
The spiral structure introduces a dimensional aspect where the wire extends along the blood flow direction while forming intercepting gaps in the radial direction. This allows thrombus interception through the spiral turns without significantly blocking axial blood flow, resolving the contradiction between interception capability and blood flow maintenance.
3Ease of manufacture
If coaxial spiral lines are used to simplify production, then manufacturing ease is improved, but blood flow turbulence increases
Solution Approach 1:
The spiral lines are designed with asymmetric spacing and orientation relative to the blood flow direction. This asymmetric configuration disrupts flow patterns to prevent turbulence while maintaining manufacturing simplicity through the spiral geometry, resolving the contradiction between ease of manufacture and blood flow stability.
4Reliability
If thinner metal wire is used to intercept smaller thrombi, then thrombus interception capability is improved, but wire stability deteriorates
Solution Approach 1:
The thinner wire is formed into a spiral curvature that provides structural rigidity through geometric configuration. This curvature allows the thin wire to maintain stability and resist deformation from blood flow while preserving its ability to intercept smaller thrombi, resolving the contradiction between wire thickness and stability.
5Reliability
If non-coaxial spiral lines are used to balance blood flow and thrombus interception, then thrombus interception capability is improved, but production complexity increases
Solution Approach 1:
The spiral structure is segmented into multiple turns that can be manufactured as a single piece using standard wire forming techniques. This segmentation allows for simple production while achieving the complex function of balanced blood flow and thrombus interception through the spiral geometry, resolving the contradiction between interception capability and production complexity.
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
Enhances thrombi interception capability, reduces blood flow turbulence, and simplifies production, while maintaining stable blood flow dynamics and reducing thrombus formation.
Implementation Method 1
presetting a shape using a superelastic metal wire
Implementation Method 2
the wire recovers to its preset shape and stabilizes within the vessel
Implementation Method 3
a coaxial multi-turn spiral or vortex line
Implementation Method 4
The fixing section secures the embolic protection device for intravascular use to the blood vessel wall by compression stress between metal wire and blood vessel
Data Source
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AI summary
The present disclosure provides an embolic protection device for intravascular use. A metal wire or strip with an elliptical or flat cross-section is formed in a coaxial multi-turn spiral or vortex line, to be used as an embolic protection device for intravascular implantation. The disclosure optimizes the performance of the embolic protection device for intravascular use, enhancing the ability to intercept thrombi.