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Proceedings Paper

Endocardial irrigated catheter for volumetric optoacoustic mapping of radio-frequency ablation
Author(s): Çağla Özsoy; Xosé Luis Deán-Ben; Daniel Razansky
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Paper Abstract

Radio-frequency (RF) catheter ablation is routinely used in the clinics to treat arrhythmias, neoplastic lesions and other dysfunctional tissues. It is based on scarring the target tissue via localized heating induced by medium frequency alternating current in the proximity of a metallic ablation catheter. The outcome of RF interventions strongly relies on the temperature distribution within the treated tissue as well as on the exposure time, which cannot be efficiently monitored with existing clinical tools. Optoacoustic (OA) tomography has recently been shown to provide unique capabilities for RF ablation monitoring such as high spatio-temporal resolution, hand-held operation feasibility and high sensitivity to temperature changes and tissue coagulation. However, shallow light penetration in biological tissues strongly limits the accessible regions, particularly for cardiac procedures, while internal illumination through the catheter induces strong responses in the metallic parts that hamper soft tissue visualization. Herein, we present a new endocardial catheter based on saline irrigation that delivers electric current while being transparent for light. The new design averts OA image artifacts due to the presence of metallic electrodes while retaining the ablation efficiency.

Paper Details

Date Published: 22 July 2019
PDF: 4 pages
Proc. SPIE 11079, Medical Laser Applications and Laser-Tissue Interactions IX, 110790X (22 July 2019); doi: 10.1117/12.2527167
Show Author Affiliations
Çağla Özsoy, Univ. Zürich (Switzerland)
ETH Zurich (Switzerland)
Xosé Luis Deán-Ben, Univ. Zürich (Switzerland)
ETH Zurich (Switzerland)
Daniel Razansky, Univ. Zürich (Switzerland)
ETH Zurich (Switzerland)

Published in SPIE Proceedings Vol. 11079:
Medical Laser Applications and Laser-Tissue Interactions IX
Lothar D. Lilge; Carsten M. Philipp, Editor(s)

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