In-vitro testing of a new CO2 laser wavelength flexible waveguide for potential application in endoscopic laser stapedotomy

Brian Baxt; Sofia Zeyger; Donald F. Perrault Jr.; Hannu J. Valtonen M.D.; Michail M. Pankratov; Stanley M. Shapshay M.D.

doi:10.1117/12.237561

5 April 1996 In-vitro testing of a new CO₂ laser wavelength flexible waveguide for potential application in endoscopic laser stapedotomy

Brian Baxt, Sofia Zeyger, Donald F. Perrault Jr., Hannu J. Valtonen M.D., Michail M. Pankratov, Stanley M. Shapshay M.D.

Author Affiliations +

Proceedings Volume 2677, Biomedical Fiber Optics; (1996) https://doi.org/10.1117/12.237561
Event: Photonics West '96, 1996, San Jose, CA, United States

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.

Citation Download Citation

Brian Baxt, Sofia Zeyger, Donald F. Perrault Jr., Hannu J. Valtonen M.D., Michail M. Pankratov, and Stanley M. Shapshay M.D. "In-vitro testing of a new CO₂ laser wavelength flexible waveguide for potential application in endoscopic laser stapedotomy", Proc. SPIE 2677, Biomedical Fiber Optics, (5 April 1996); https://doi.org/10.1117/12.237561

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KEYWORDS

Waveguides

Carbon dioxide lasers

Bone

Optical testing

Argon ion lasers

Surgery

Ear

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