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Proceedings Paper

Quantitation Of Gas Production In Laser Angiosurgery With An Optically-Shielded Laser Catheter
Author(s): G.Stefan Davis; Corinne Bott-Silverman; Marlene Goormastic; Ross G. Gerrity; John R. Kramer; Carter Kittrell; Michael Feld
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Paper Abstract

This study quantitates the amount of gas produced when firing an optically shielded argon ion laser into 0.9% saline solution and blood alone, and into atheromatous aorta in either a blood or 0.9% saline medium. Energies from 0.25 to 4 J were used at powers of 2, 5, and 8 watts. We found that total volume of gas produced is small not only at equilibrium (0.3 + 0.1 ul/J when firing in blood alone and also firing in aorta in blood or saline medium), but also at peak (2.5 + 0.2 ul/J firing in blood alone and 1.0 + 0.1 ul/J or 0.9 + 0.1 ul/J when ablating aorta in saline or aorta, respectively). The peak gas volume when firing in blood alone was significantly greater than the other chamber environments. This is thought to be due to increased absorption of argon laser light by hemoglobin. The gas volumes produced by lasing aorta in 0.9% saline or blood were not statistically different. This finding is attributed to the catheter design which has a quartz tip surrounding the optical fiber that acts to displace the media from the lasing field. This catheter design negates the effect the medium might have on the laser light/target interaction.

Paper Details

Date Published: 1 April 1987
PDF: 4 pages
Proc. SPIE 0713, Optical Fibers in Medicine II, (1 April 1987); doi: 10.1117/12.937367
Show Author Affiliations
G.Stefan Davis, Cleveland Clinic Foundation (United States)
Corinne Bott-Silverman, Cleveland Clinic Foundation (United States)
Marlene Goormastic, Cleveland Clinic Foundation (United States)
Ross G. Gerrity, Cleveland Clinic Foundation (United States)
John R. Kramer, Cleveland Clinic Foundation (United States)
Carter Kittrell, Massachusetts Institute of Technology (United States)
Michael Feld, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 0713:
Optical Fibers in Medicine II
Abraham Katzir, Editor(s)

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