Circumferential ablation devices and methods
Inventors
Turovskiy, Roman • MOOSAVI, David • QUINTOS, Rodel • Danitz, David J. • Bradway, Ryan C. • Denison, Andy E. • Montgomery, Dylan R. • D'Aquanni, Peter J.
Assignees
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Publication Number
US-12408976-B2
Publication Date
2025-09-09
Expiration Date
Abstract
Methods and apparatuses are disclosed for providing pulsed electrical treatment (including high voltage, sub-microsecond pulsed electric energy) to body vessels. The apparatus may include deployable electrodes that conform to transitional surfaces. These apparatuses may include multiple wire loops forming petal-like electrodes configured to expand with an expandable member, such as a balloon.
Core Innovation
The disclosure describes systems and methods for delivering pulsed electric fields for circumferential ablation of body-vessel walls. An apparatus includes an elongate body with an expandable member at a distal end region, and a first electrode assembly and a second electrode assembly arranged around the expandable member such that their respective active regions extend around all or at least a portion of a circumference of the expandable member.
Each electrode assembly comprises a plurality of wire loops, where each wire loop forms a petal having an active region. The first electrode assembly is laterally offset from the second electrode assembly along a length of the expandable member or balloon, and both electrode assemblies are configured to expand radially outward when the expandable member is expanded.
The active regions include structural and electrical-related features that preserve circumferential delivery. The disclosure includes insulated regions flanking active regions, laterally offset electrode assemblies, spatial separation between opposing active regions, and in one configuration each active region comprises a flexible bend with an angle configured to expand as the balloon is expanded, with return to a radially collapsed or constricted configuration when the balloon is contracted.
Claims Coverage
The document contains two independent claims. The main inventive features are the circumferentially arranged petal-shaped active regions formed by wire loops, the laterally offset first and second electrode assemblies, and the radially outward expansion behavior, including optional insulated boundaries and minimum or fixed separation between opposing active regions.
Petal-shaped active regions on laterally offset expandable electrode assemblies
An elongate body having an expandable member at a distal end region; a first electrode assembly comprising a first plurality of wire loops, each wire loop forming a petal with a first active region arranged around the expandable member and extending around all or at least a portion of a circumference; and a second electrode assembly comprising a second plurality of wire loops, each wire loop forming a petal with a second active region arranged around the expandable member and extending around all or at least a portion of a circumference, where the first electrode assembly is laterally offset from the second electrode assembly along a length of the expandable member and the first electrode assembly and the second electrode assembly are configured to expand radially outward when the expandable member is expanded.
Flexible bend active regions on a balloon with laterally offset electrode assemblies
An elongate body; a balloon on the elongate body; a first electrode assembly comprising a first plurality of wire loops forming petals having first active regions arranged on the balloon; and a second electrode assembly comprising a second plurality of wire loops forming petals having second active regions arranged on the balloon, wherein each of the first active regions and each of the second active regions comprises a flexible bend with an angle configured to expand as the balloon is expanded so that the first electrode assembly and the second electrode assembly expands radially outward when the balloon is expanded, further wherein the first electrode assembly is laterally offset from the second electrode assembly along a length of the balloon.
Across both independent claims, the coverage centers on an apparatus delivering pulsed electric fields using two electrode assemblies formed from wire-loop petals with circumferentially extending active regions on an expandable member or balloon. In both cases, the electrode assemblies are laterally offset and radially expandable to maintain circumferential coverage, with claim-set refinements including flexible bend behavior, insulated regions bounding active regions, and spatial separation constraints between opposing active regions.
Stated Advantages
Documented Applications
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