Tissue ablation with excimer laser and multiple-fiber catheters: effects of optical fiber density and fluence

Jan Kvasnicka; Fumitaka Nakamura M.D.; Herbert J. Geschwind M.D.; Francoise Lange

doi:10.1117/12.137297

28 August 1992 Tissue ablation with excimer laser and multiple-fiber catheters: effects of optical fiber density and fluence

Jan Kvasnicka, Fumitaka Nakamura M.D., Herbert J. Geschwind M.D., Francoise Lange

Author Affiliations +

Proceedings Volume 1642, Diagnostic and Therapeutic Cardiovascular Interventions II; (1992) https://doi.org/10.1117/12.137297
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

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.

Citation Download Citation

Jan Kvasnicka, Fumitaka Nakamura M.D., Herbert J. Geschwind M.D., and Francoise Lange "Tissue ablation with excimer laser and multiple-fiber catheters: effects of optical fiber density and fluence", Proc. SPIE 1642, Diagnostic and Therapeutic Cardiovascular Interventions II, (28 August 1992); https://doi.org/10.1117/12.137297

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available