Textured Ablation Catheter Surface for Tissue Contact Stability
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Solution Overview
Problem
Conventional ablation catheters face challenges in maintaining consistent contact between catheter electrodes and target tissues during ablation procedures, leading to variability in treatment outcomes.
Innovation Solution
The development of an ablation catheter with a patterned and textured active area, which enhances the coefficient of friction between the catheter and tissue, thereby improving surface contact and stability during procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional force is applied at the catheter tip to maintain contact between catheter and tissue, then contact stability is improved, but tissue damage risk increases
Solution Approach 1:
The catheter tip is equipped with a textured surface featuring protrusions that concentrate contact force at specific localized points rather than distributing it across the entire tip surface. This allows sufficient grip on the tissue with reduced overall force application, preventing edema and perforation while maintaining stable contact during ablation procedures
2Ease of manufacture
If a smooth catheter surface is used, then ease of manufacture is improved, but contact stability with tissue deteriorates
Solution Approach 1:
The catheter tip surface is modified by adding protrusions that change the surface topology from smooth to textured. This structural parameter change increases the coefficient of friction and mechanical interlocking with tissue, improving contact stability without requiring complex manufacturing processes beyond standard texturing techniques
3Reliability
If a textured surface is added to the catheter tip, then contact stability is improved, but device complexity increases
Solution Approach 1:
The textured surface on the catheter tip consists of discrete protrusions that are segmented across the surface rather than forming a continuous complex pattern. This segmentation simplifies the overall structure while providing multiple contact points that enhance grip and stability on the tissue surface during ablation
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
The patterned and textured surface of the catheter electrode increases friction, stabilizes the device on the target tissue, and enhances heat transfer, resulting in more consistent and effective ablation treatments.
Implementation Method 1
the active area of the ablation catheter is an electrode having a patterned and textured surface that increases a coefficient of friction between the target tissue and the electrode during ablation in order to provide proper grip and surface contact
Implementation Method 2
the patterned and textured surface of the electrode may improve heat transfer between the electrode of the ablation catheter and the blood surrounding the target tissue
Implementation Method 3
For radiofrequency (RF) ablation, the application of alternating current with an oscillating frequency above several hundreds of kHz avoids the stimulation of excitable tissue while delivering heat by means of the Joule's effect
Data Source
AI summary
Described herein are devices and methods for performing ablation using ablation catheters with one or more patterned and textured active areas. An ablation catheter includes a proximal section, a distal section, and a sheath coupled between the distal section and the proximal section. The distal section includes an active area with a patterned, textured surface that is configured to apply radiofrequency (RF) energy, cryogenic cooling, or laser energy output to a portion of target tissue, such that the portion of target tissue is ablated. The patterned, textured surface of the active area is configured to maintain contact between the target tissue and the active area.