gms | German Medical Science

79. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e. V.

Deutsche Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e. V.

30.04. - 04.05.2008, Bonn

Comparing Studies on Objective Measurements of the Glottic Gap in a Porcine Model

Meeting Abstract

  • author Volker Tauchmann - Klinik für HNO-Heilkunde/Plastische Operationen, SRH Waldklinikum Gera, Gera, Germany
  • author Gerhard Förster - Klinik für HNO-Heilkunde/Plastische Operationen, SRH Waldklinikum Gera, Gera, Germany
  • author Wilma Harnisch - Klinik und Poliklinik für HNO-Heilkunde, Universitätsklinikum Würzburg, Würzburg, Germany
  • corresponding author Andreas Müller - Klinik für HNO-Heilkunde/Plastische Operationen, SRH Waldklinikum Gera, Gera, Germany

German Society of Oto-Rhino-Laryngology, Head and Neck Surgery. 79th Annual Meeting of the German Society of Oto-Rhino-Laryngology, Head and Neck Surgery. Bonn, 30.04.-04.05.2008. Düsseldorf, Köln: German Medical Science; 2008. Doc08hno43

Die elektronische Version dieses Artikels ist vollständig und ist verfügbar unter: http://www.egms.de/de/meetings/hno2008/08hno43.shtml

Veröffentlicht: 8. Juli 2008

© 2008 Tauchmann et al.
Dieser Artikel ist ein Open Access-Artikel und steht unter den Creative Commons Lizenzbedingungen (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.de). Er darf vervielf&aauml;ltigt, verbreitet und &oauml;ffentlich zug&aauml;nglich gemacht werden, vorausgesetzt dass Autor und Quelle genannt werden.


Gliederung

Text

In the clinical routine glottic patency is estimated mainly by indirect laryngoscopy and self assessment of the patient. If there are discrepancies between laryngoscopic estimates and subjective complaints an objective measurement would be desirable.

In the present work two different methods for video analysis (glottic angle measurement and a relative glottic area index by Harnisch) were compared with a laser sizing system (Techno Pack II by Karl Storz, Tuttlingen, Germany) (Figure 1 [Fig. 1] ). 28 porcine larynx specimens were analysed in five different vocal fold positions. Image acquisition was realised with the fiberoptic camera system of the Techno Pack II. Measurements were analysed and correlated. Image resolution and barrel distortion limited accuracy in this controlled model. In a clinical setting this could be improved with rigid optics endoscopy.

We found very good correlations between laser sizing, glottic angle and glottic area index within the same specimen and looking at all measurements taken together (r>0.98). Separating results for different glottic widths revealed best correlations between laser sizing and glottic angle. Correlation was better for the clinically more relevant smaller glottic gaps (r=0.88) and decreased with increasing glottic gap (r=0.5). There were poor correlations between laser sizing and glottic area index (r=0.6 to r=0.1). In conclusion the glottic angle seems to be a simple and more robust parameter. It can be extrapolated in cases of an incomplete capture of the glottic gap.


References

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