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Proceedings Paper

Radially focusing fiber optic probes for laser angioplasty
Author(s): Richard T. Mihran; Huey-Daw Wu; Frank S. Barnes
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Paper Abstract

In this paper a novel laser angioplasty probe is presented in which the emitted beam from a multi-mode fiber is both radially reflected and simultaneously focused to form a well-defined ring of high intensity light which is concentric with the fiber axis. The intensity distribution of the probe emission will thus exhibit a maximum at a given radial distance from the fiber axis, depending on the particular geometry of the probe. As a consequence of this convergence at a particular radius, this probe has been demonstrated in vitro to act in a self-limiting manner to enlarge an existing lumen in human atherosclerotic vessel tissue using a 4W argon laser. The small diameter (1 mm) of the probe suggests the viability for in vivo angioplasty applications. A set of fiber probes having a variety of focal ring diameters ranging from 1 to 4 mm have been fabricated, tested, and analyzed. Theoretical and experimental intensity distributions are presented, and the important parameters of the probe designed for this and additional applications are discussed.

Paper Details

Date Published: 28 August 1992
PDF: 5 pages
Proc. SPIE 1642, Diagnostic and Therapeutic Cardiovascular Interventions II, (28 August 1992); doi: 10.1117/12.137299
Show Author Affiliations
Richard T. Mihran, Univ. of Colorado/Boulder (United States)
Huey-Daw Wu, Univ. of Colorado/Boulder (United States)
Frank S. Barnes, Univ. of Colorado/Boulder (United States)

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

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