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Temperature and Pressure Effects During Erbium Laser Stapedotomy by Pratisto, Hans; Frenz, Martin; Ith, Michael; Romano, Valerio; Felix, Dominik; Grossenbacher, Rudolf; Altermatt, Hans J.; Weber, Heinz P. is a Medicine article available to read on EtoBox.

What is Temperature and Pressure Effects During Erbium Laser Stapedotomy about?

Background and Objectives: Laser-assisted stapedotomy has become a well-established alternative to the mechanical drilling method. The goal of this study is to quantify the mechanical and thermal tissue effects and to determine optimum erbium laser parameters for safe clinical treatment. Study DesignlMaterials and Methods: On an inner ear model, time-resolved pressure measurements and Schlieren optical flash photography were performed during the perforation of the stapes foot plate using an erbium laser at 2.79 pm. The laser radiation was transmitted via an optical zirconium fluoride fiber. The laser-treated foot plates were investigated by light microscopy and scanning electron microscopy to visualise the laserinduced tissue effects. Results: Perforation of the stapes foot plate can be performed with a few erbium laser pulses with high precision and a thermal damage zone of <lo pm. Strong pressure transients were found to be generated by the bone ablation process and the collapse of a vapor channel created in the perilymph after fenestration. ## Conclusion: From the comparison of the laser-induced pressure with the limit graph to avoid hearing defects published by Pfander, an unob

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Author

Pratisto, Hans; Frenz, Martin; Ith, Michael; Romano, Valerio; Felix, Dominik; Grossenbacher, Rudolf; Altermatt, Hans J.; Weber, Heinz P.

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0196-8092)

Published

1996

Language

EN

Field

Medicine (Health Sciences)