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Proceedings Paper

Tissue ablation with excimer laser and multiple-fiber catheters: effects of optical fiber density and fluence
Author(s): Jan Kvasnicka; Fumitaka Nakamura; Herbert J. Geschwind; Francoise Lange
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Paper Abstract

This study was performed to assess the ablational properties of the 1.4, 1.7, and 2.0 wire- guided multiple fiber catheters coupled to an XeCl excimer laser. The samples of human post- mortem aorta were irradiated in blood at fluences of 40, 50, and 60 mJ/mm2. Our results indicate: (1) An increase in the active irradiation coverage results and an increase in the ablation efficiency. (2) The ablation efficiency is not fluence-related using the 1.4 or 1.7 multiple fiber catheter but depends on fluence using the 2.0 multiple fiber catheter. (3) The depth of tissue ablated with the multiple fiber catheter depends primarily upon the proportion of the active irradiation coverage at the catheter tip. (4) The 2.0 multiple fiber catheter induces craters surrounded by a larger zone of tissue damage than that observed with the 1.4 or 1.7 multiple fiber catheter. (5) The 2.0 multiple fiber catheter should be used cautiously in laser angioplasty because of its high penetration and its possibility of arterial wall damage.

Paper Details

Date Published: 28 August 1992
PDF: 7 pages
Proc. SPIE 1642, Diagnostic and Therapeutic Cardiovascular Interventions II, (28 August 1992); doi: 10.1117/12.137297
Show Author Affiliations
Jan Kvasnicka, Univ. Hopital Henri Mondor (France)
Fumitaka Nakamura, Univ. Hopital Henri Mondor (France)
Herbert J. Geschwind, Univ. Hopital Henri Mondor (France)
Francoise Lange, Univ. Hopital Henri Mondor (France)

Published in SPIE Proceedings Vol. 1642:
Diagnostic and Therapeutic Cardiovascular Interventions II
George S. Abela, Editor(s)

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