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Transmission of heat to the vestibule during revision stapes surgery using a KTP laser: an in vitro study

Published online by Cambridge University Press:  08 March 2006

Marcin Szymanski ,
Robert Mills  and
Eric Abel
Marcin Szymanski
Affiliation:
Otolaryngology Unit, University of Edinburgh, Edinburgh, Uk.
Robert Mills
Affiliation:
Otolaryngology Unit, University of Edinburgh, Edinburgh, Uk.
Eric Abel
Affiliation:
Department of Mechanical Engineering, University of Dundee, Dundee, UK.
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Abstract

The transmission of heat to the vestibule during revision stapes surgery with a piston in situ has been studied using a KTP laser in an in vitro model. A type K thermocouple was placed around the medial of each piston tested in a ‘vestibule’ filled with saline. The effect of laser hits on fluoroplastic, fluoroplastic-wire and stainless steel stapes prostheses was investigated. The effect of adding blood to the operative field, of introducing a vein graft to seal the stapedotomy and of vaporizing soft tissue in the oval window were also examined. Greater temperature rises occurred with stainless steel than with the other piston types and smaller rises occurred when there was a vein graft in situ. The maximum temperature rise recorded was 2.6°C. We conclude that the use of the KTP laser to clear soft tissue from the oval window is safe when operated at the power levels recommended by the manufacturer.

Keywords

Stapes SurgeryReoperationLaser SurgeryThermal Conductivity
Type
Research Article
Information
The Journal of Laryngology & Otology , Volume 117 , Issue 5 , May 2003 , pp. 349 - 352
Copyright
© Royal Society of Medicine Press Limited 2003

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