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Proceedings Paper

Ultrafast laser ablation for targeted atherosclerotic plaque removal
Author(s): Thomas Lanvin; Donald B. Conkey; Laurent Descloux; Aurelien Frobert; Jeremy Valentin; Jean-Jacques Goy; Stéphane Cook; Marie-Noelle Giraud; Demetri Psaltis
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Paper Abstract

Coronary artery disease, the main cause of heart disease, develops as immune cells and lipids accumulate into plaques within the coronary arterial wall. As a plaque grows, the tissue layer (fibrous cap) separating it from the blood flow becomes thinner and increasingly susceptible to rupturing and causing a potentially lethal thrombosis. The stabilization and/or treatment of atherosclerotic plaque is required to prevent rupturing and remains an unsolved medical problem. Here we show for the first time targeted, subsurface ablation of atherosclerotic plaque using ultrafast laser pulses. Excised atherosclerotic mouse aortas were ablated with ultrafast near-infrared (NIR) laser pulses. The physical damage was characterized with histological sections of the ablated atherosclerotic arteries from six different mice. The ultrafast ablation system was integrated with optical coherence tomography (OCT) imaging for plaque-specific targeting and monitoring of the resulting ablation volume. We find that ultrafast ablation of plaque just below the surface is possible without causing damage to the fibrous cap, which indicates the potential use of ultrafast ablation for subsurface atherosclerotic plaque removal. We further demonstrate ex vivo subsurface ablation of a plaque volume through a catheter device with the high-energy ultrafast pulse delivered via hollow-core photonic crystal fiber.

Paper Details

Date Published: 15 July 2015
PDF: 6 pages
Proc. SPIE 9542, Medical Laser Applications and Laser-Tissue Interactions VII, 95420Z (15 July 2015); doi: 10.1117/12.2197919
Show Author Affiliations
Thomas Lanvin, École Polytechnique Fédérale de Lausanne (Switzerland)
Donald B. Conkey, École Polytechnique Fédérale de Lausanne (Switzerland)
Laurent Descloux, École Polytechnique Fédérale de Lausanne (Switzerland)
Aurelien Frobert, Univ. of Fribourg (Switzerland)
Jeremy Valentin, Univ. of Fribourg (Switzerland)
Jean-Jacques Goy, Univ. of Fribourg (Switzerland)
Stéphane Cook, Univ. of Fribourg (Switzerland)
Marie-Noelle Giraud, Univ. of Fribourg (Switzerland)
Demetri Psaltis, École Polytechnique Fédérale de Lausanne (Switzerland)

Published in SPIE Proceedings Vol. 9542:
Medical Laser Applications and Laser-Tissue Interactions VII
Lothar D. Lilge; Ronald Sroka, Editor(s)

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