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Proceedings Paper

In-vitro testing of a new CO2 laser wavelength flexible waveguide for potential application in endoscopic laser stapedotomy
Author(s): Brian Baxt; Sofia Zeyger; Donald F. Perrault; Hannu J. Valtonen; Michail M. Pankratov; Stanley M. Shapshay
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Paper Abstract

Advancements in minimally invasive surgery, in areas such as otology, require that the surgeon operates through a small opening, often with indirect access to the surgical field. Conventional carbon-dioxide laser delivery systems, such as the micromanipulator and the semi-flexible waveguide limit the surgeon's ability to perform such procedures. The ablation properties of a small, flexible, hollow carbon-dioxide laser waveguide (Medical Optics, Carlsbad, CA) were compared to a conventional surgical carbon-dioxide laser micromanipulator on chinchilla calvarium bone. This waveguide has a small diameter (O.D./I.D. equals 500/300 micrometer) and is therefore potentially useful for minimally invasive middle ear surgical procedures, such as carbon-dioxide laser stapedotomy. The beam diameter and the half angle divergence of the waveguide were estimated using a standard knife-edge measurement technique. Lesions were created at clinically relevant power settings with each delivery system on fresh harvested chinchilla bone. The crater size and the thermal damage width were then measured under a light microscope. The size of the lesions were found to be comparable between the two delivery systems. This preliminary study demonstrates that the two delivery systems have comparable effects on bone. However, further work is necessary to compare their effects on healing before the waveguide can be used clinically for surgical procedures such as carbon-dioxide laser stapedotomy.

Paper Details

Date Published: 5 April 1996
PDF: 9 pages
Proc. SPIE 2677, Biomedical Fiber Optics, (5 April 1996); doi: 10.1117/12.237561
Show Author Affiliations
Brian Baxt, New England Medical Ctr. and Tufts Univ. School of Medicine (United States)
Sofia Zeyger, New England Medical Ctr. and Tufts Univ. School of Medicine (United States)
Donald F. Perrault, New England Medical Ctr. and Tufts Univ. School of Medicine (United States)
Hannu J. Valtonen, New England Medical Ctr. and Tufts Univ. School of Medicine (United States)
Michail M. Pankratov, New England Medical Ctr. and Tufts Univ. School of Medicine (United States)
Stanley M. Shapshay, New England Medical Ctr. and Tufts Univ. School of Medicine (United States)


Published in SPIE Proceedings Vol. 2677:
Biomedical Fiber Optics
Abraham Katzir; James A. Harrington, Editor(s)

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