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Correlation between tympanometry volume and three-dimensional computed tomography mastoid volumetry in tympanoplasty candidates

Published online by Cambridge University Press:  05 July 2021

L Epprecht
Affiliation:
Department of Otorhinolaryngology, Head and Neck Surgery, Luzerner Kantonsspital, Lucerne, Switzerland Department of Otorhinolaryngology and Head and Neck Surgery, University Hospital of Zurich, Switzerland
L Qingsong
Affiliation:
Department of Otolaryngology Head and Neck Surgery, Bejing Luhe Hospital, Capital Medical University, China
N Stenz
Affiliation:
Department of Otorhinolaryngology, Head and Neck Surgery, Luzerner Kantonsspital, Lucerne, Switzerland
S Hashimi
Affiliation:
Department of ENT, Peterborough City Hospital, North West Anglia NHS Trust, UK
T Linder*
Affiliation:
Department of Otorhinolaryngology, Head and Neck Surgery, Luzerner Kantonsspital, Lucerne, Switzerland
*
Author for correspondence: Dr Thomas Linder, Department of Otorhinolaryngology, Head and Neck Surgery, Canton Hospital of Lucerne, Spitalstrasse 1, Lucerne6000, Switzerland E-mail: thomas.linder@luks.ch

Abstract

Objective

Ventilation of the middle ear and mastoid air cells is believed to play an important role in the pathogenesis of chronic ear disease. Traditionally, ventilation is assessed by computed tomography. However, this exposes patients to cumulative radiation injury. In cases with a perforation in the tympanic membrane, tympanometry potentially presents a non-invasive alternative to measure the ventilated middle-ear and mastoid air cell volume. This study hypothesised that total tympanometry volume correlates with ventilated middle-ear and mastoid air cell volume.

Method

Total tympanometry volume was compared with ventilated middle-ear and mastoid air cell volume on computed tomography scans in 20 tympanic membrane perforations.

Results

There was a high correlation between tympanometry and computed tomography volumes (r = 0.78; p < 0.001). A tympanometry volume more than 2 ml predicted good ventilation on computed tomography.

Conclusion

These results may help reduce the need for pre-operative computed tomography in uncomplicated cases with tympanic membrane perforations.

Type
Main Articles
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press

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Footnotes

Prof T Linder takes responsibility for the integrity of the content of the paper

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