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DOI: 10.1055/s-0040-1711265
Estimation of prosthesis lengths using digital surgery microscopes - experiments in human temporal bones
Introduction Digital surgery microscopes with 3D imaging and in situ distance measurement open up new perspectives in middle ear surgery. Intraoperative determination of prosthesis lengths for ossicular reconstruction is of particular interest.
Methods Measurements were performed in 7 human temporal bones. After tympanotomy, several points were registrated with ARRIscope. With the help of these points, the prosthesis’ shape and length can generally be determined. Using a TORP, two different visual angles are needed to define all the necessary points. After registration of identical reference points from both angles, coordinates could be transformed and evaluated altogether.
Results A common coordinate system was calculated by coordinate transformation, offering various further calculations. Deviations of transformed coordinates were under 0.1 mm, a high accuracy can be assumed.
Conclusion An in situ measurement of prosthesis lengths and shapes during ossicular reconstruction seems possible with reasonable accuracy.
Heinz Kurz GmbH Medizintechnik, ARRI Medical GmbH
Poster-PDF A-1409.PDF
Publication History
Article published online:
10 June 2020
© 2020. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).
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