Catheter Carrier Stabilized Interstices Curved Vessels
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Solution Overview
Problem
Conventional radiofrequency ablation catheters have limited adaptability to varying blood vessel diameters and poor performance in curved vessels, leading to inconsistent contact and reduced effectiveness in radiofrequency ablation treatments.
Innovation Solution
A catheter apparatus with a carrier comprising m right-handed and n left-handed wire helixes woven into a tubular structure, featuring interstices stabilized by therapeutic assemblies to maintain structural integrity and prevent tangling, allowing for adjustable expansion and maintenance of configuration during intravascular use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single specification catheter with constant expansion dimension is used, then the device structure is simple, but it cannot adapt to different blood vessel diameters
Solution Approach 1:
The carrier is designed with dynamic expansion capability, transitioning from a compressed delivery configuration to an expanded treatment configuration. The wire helix structure allows the carrier to expand and conform to different vessel diameters while maintaining structural integrity, resolving the contradiction between adaptability and structural simplicity.
Solution Approach 2:
The carrier's physical parameters (expansion dimension, configuration) are changed to adapt to different blood vessel diameters. By adjusting the expansion degree of the wire helix structure, the device can accommodate vessels ranging from 2mm to 12mm in diameter without requiring multiple catheter specifications.
2Reliability
If the stent is expanded to contact curved blood vessel walls, then electrode contact is improved, but the stent becomes distorted and cannot resume original configuration
Solution Approach 1:
The carrier uses a flexible wire helix structure that can bend and conform to curved blood vessel walls while maintaining its overall configuration. The interstices between wire helices provide flexibility, allowing the carrier to navigate tortuous vessels without permanent distortion, thus maintaining both contact reliability and configuration stability.
Solution Approach 2:
Instead of making the stent rigid to maintain configuration, the invention uses a flexible wire helix structure that achieves configuration stability through its inherent elastic properties. The structure can be distorted during delivery and deployment but automatically returns to its original configuration, inverting the traditional approach of using rigidity for stability.
3Adaptability or versatility
If the carrier structure is made more flexible to adapt to curved vessels, then navigability is improved, but structural integrity and wire helix stability deteriorate
Solution Approach 1:
The carrier combines multiple wire helices with different orientations (right-handed and left-handed) to create a composite structure. This composite wire helix configuration provides both flexibility for navigating curved vessels and sufficient structural integrity to prevent collapse or tangling during delivery and deployment.
Solution Approach 2:
The wire helix structure inherently provides curvature and flexibility, allowing the carrier to conform to the curved geometry of blood vessels. The helical configuration distributes mechanical stresses evenly, maintaining structural integrity while enabling adaptation to tortuous vascular paths.
Data Source
AI summary
The present invention provides a catheter apparatus with a carrier comprising right-handed wire helixes and left-handed wire helixes that are plainly or bi-axially woven into a tubular structure. A therapeutic assembly wraps around one of the wire helixes to stabilize an associated interstice of the tubular structure. The regular shape of the carrier may be quickly recovered after the carrier is seriously bent or distorted in an intravascular treatment.