Multi-Cavity PFA Catheter for Annular and Single-Point Ablation

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Solution Overview

Problem

Existing PFA catheters lack multifunctionality, failing to simultaneously perform both circumferential and single-point tissue ablation, and their complex structures complicate production and processing.

Innovation Solution

A multifunctional pulse energizing device with a multi-cavity component, featuring sub-tube portions with first electrodes for annular ablation and a distal end electrode for single-point ablation, along with a movable cutting layer for adjustable deformation, allowing both annular and single-point tissue ablation modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single-cavity PFA catheter is used, then the structure is simple, but it cannot simultaneously perform both circumferential and single-point tissue ablation

Engineering Contradiction:

ImprovemultifunctionalityVSAvoidstructure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The catheter is divided into multiple independent cavities (central cavity and peripheral cavities) within the multi-cavity component. Each cavity can independently receive and deliver pulse energy through its respective electrode, enabling both circumferential ablation (via peripheral cavities) and single-point ablation (via central cavity) functions simultaneously without requiring separate catheters.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The multi-cavity component serves multiple functions: the central cavity with its electrode enables single-point tissue ablation, while the peripheral cavities with their electrodes enable circumferential ablation. This single component integrates both ablation modes, making the catheter versatile for different treatment requirements without needing multiple specialized devices.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If a complex multi-cavity structure is used to achieve multifunctionality, then both annular and single-point ablation are enabled, but production and processing become complicated

Engineering Contradiction:

Improveablation mode flexibilityVSAvoidproduction complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The peripheral cavities are positioned around and nested within the central cavity structure, all contained within a single multi-cavity component. This nested arrangement allows both ablation modes to coexist in a compact configuration that can be manufactured as an integrated unit, reducing the complexity of assembling multiple separate components.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The multi-cavity component is designed with different cavity types (central and peripheral) having specific local properties suited for their respective functions. The central cavity is optimized for single-point access while peripheral cavities are positioned for circumferential coverage. This localized optimization within a unified structure enables multifunctionality without requiring entirely separate device designs.

Inventive Principle:

Principle #3Local quality

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 device enables flexible tissue ablation, achieving both annular and single-point treatments efficiently, simplifying production, and ensuring compatibility with smaller blood vessels through a streamlined design.

Implementation Method 1

Pulsed field ablation (PFA) is a minimally invasive treatment that uses high-voltage, high-frequency pulsed electric fields to create irreversible electroporation in target tissue, leading to cell membrane perforation and tissue destruction without significant thermal damage

Methodology Applied

Scientific EffectPulsed electric field ablation: Electrical Discharge Machining

Implementation Method 2

The second electrode is disposed at a distal end of the central component, and configured to perform single-point discharge; and a third electrode, disposed at a distal end of multi-cavity component and configured to perform single-point discharge

Methodology Applied

Scientific EffectElectrical discharge: Electric Spark

Data Source

PatentUS20250359926A1Multifunctional pulse energizing device and processing method for the same

Publication Date: 2025.11.27 SHENZHEN PULSECARE MEDICAL TECH CO LTD

AI summary

A multifunctional pulse energizing device includes a multi-cavity component and a first pull component. A portion of the multi-cavity component between a proximal end and a distal end is cut along an axial direction into a plurality of sub-tube portions; the multi-cavity component is provided with a multi-layer structure, which is configured to form the sub-tube portions and a central cavity; and a plurality of first electrodes are disposed on the sub-tube portions respectively, a second electrode is disposed on the central component, and a third electrode is disposed at a distal end of the multi-cavity component. The multifunctional pulse energizing device has the functions of single-point ablation and annular ablation to tissues, with diverse functions, simple process and low difficulty in production and manufacturing.