Near-infrared fiber delivery systems for interstitial photothermal therapy

Michael Slatkine; Douglass S. Mead; Eli Konwitz; Zvi Rosenberg

doi:10.1117/12.208400

1 May 1995 Near-infrared fiber delivery systems for interstitial photothermal therapy

Michael Slatkine, Douglass S. Mead, Eli Konwitz, Zvi Rosenberg

Proceedings Volume 2396, Biomedical Optoelectronic Instrumentation; (1995) https://doi.org/10.1117/12.208400
Event: Photonics West '95, 1995, San Jose, CA, United States

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.

Citation Download Citation

Michael Slatkine, Douglass S. Mead, Eli Konwitz, and Zvi Rosenberg "Near-infrared fiber delivery systems for interstitial photothermal therapy", Proc. SPIE 2396, Biomedical Optoelectronic Instrumentation, (1 May 1995); https://doi.org/10.1117/12.208400

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