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Proceedings Paper

Near-infrared fiber delivery systems for interstitial photothermal therapy
Author(s): Michael Slatkine; Douglass S. Mead; Eli Konwitz; Zvi Rosenberg
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Paper Abstract

Interstitial photothermal coagulation has long been recognized as a potential important, minimally invasive modality for treating a variety of pathologic conditions. We present two different technologies for interstitial photothermal coagulation of tissue with infrared lasers: An optical fiber with a radially symmetric diffusing tip for deep coagulation, and a flat bare fiber for the coagulation of thin and long lesions by longitudinally moving the fiber while lasing in concert. Urology and Gynecology Fibers: The fibers are 600 microns diameter with 20 - 40 mm frosted distal tips protected by a smooth transparent cover. When used with a Neodymium:YAG (Nd:YAG) laser, the active fiber surface diffuses optical radiation in a radial pattern, delivering up to 40 W power, and thus providing consistent and uniform interstitial photothermal therapy. Coagulation depth ranges from 4 to 15 mm. Animal studies in the United States and clinical studies in Europe have demonstrated the feasibility of using these fibers to treat benign prostatic hyperplasia and endometrial coagulation. Rhinology Fiber: The fiber is an 800 micron diameter flat fiber operated at 8 W power level while being interstitially pushed and pulled along its axis. A long and thin coagulated zone is produced. The fiber is routinely used for the shrinking of hypertrophic turbinates without surrounding and bone mucusal damage in ambulatory environments.

Paper Details

Date Published: 1 May 1995
PDF: 7 pages
Proc. SPIE 2396, Biomedical Optoelectronic Instrumentation, (1 May 1995); doi: 10.1117/12.208400
Show Author Affiliations
Michael Slatkine, Sharplan Lasers, Inc. (United States)
Douglass S. Mead, Sharplan Lasers, Inc. (United States)
Eli Konwitz, Sharplan Lasers, Inc. (United States)
Zvi Rosenberg, Sharplan Lasers, Inc. (United States)


Published in SPIE Proceedings Vol. 2396:
Biomedical Optoelectronic Instrumentation
James A. Harrington; David M. Harris; Abraham Katzir, Editor(s)

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