Radiologic CT Scan Assessment of Eustachian Tube Dimensions in a Sample of Filipino Adults with Chronic Otitis Media at the Rizal Medical Center: A Retrospective Study
DOI:
https://doi.org/10.32412/pjohns.v40i1.2569Keywords:
chronic otitis media, cholesteatoma, temporal bone CT, eustachian tube dimensionsAbstract
Objective: To describe the radiologic dimensions of the Eustachian tube (pre-tympanic diameter, tubo-tympanic angle, and Eustachian tube angle) among normal ears, ears with chronic otitis media (COM) with and without cholesteatoma, in a sample of Filipino adults with COM; and to compare the dimensions of the three variables.
Methods:
Design: Retrospective Review of Records
Setting: Tertiary Government Training Hospital
Participants: The study included 69 CT scans of adults with COM, with images of 23 ears for each variable (normal ears, COM with and without cholesteatoma formation).
Results: In normal ears, the average pre-tympanic diameter was 3.976 ± 0.78 mm, the average tubo-tympanic angle was 41.529 ± 5.85 degrees, and the average Eustachian tube Angle (Reid Plane) was 27.077 ± 4.62 degrees. In patients with COM without cholesteatoma, the mean pre tympanic diameter was 4.002 ± 1.13 mm, the mean tubo-tympanic angle was 141.994 ± 6.30 degrees, and the mean measurement of the Reid plane was 24.649 ± 3.10 degrees. In ears with COM with cholesteatoma, the mean pre-tympanic diameter was 4.1993 ± 0.50mm, the mean tubo-tympanic angle was 138.789 ± 7.13 degrees, and the mean Reid plane was 26.483 ± 3.86 degrees. P-values for the pre-tympanic diameter, tubo-tympanic angle, and ET angle were .617, .198, and .098 respectively, indicating that there were no statistically significant differences in the ET dimensions of the ears with COM with cholesteatoma, without cholesteatoma and normal ears.
Conclusion: In our investigation, we found no statistically significant differences in Eustachian tube dimensions among individuals with normal ears and COM with or without cholesteatoma. This suggests that the Eustachian tube dimensions may not serve as a primary etiological factor for COM among our patients.
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Copyright transfer (all authors; where the work is not protected by a copyright act e.g. US federal employment at the time of manuscript preparation, and there is no copyright of which ownership can be transferred, a separate statement is hereby submitted by each concerned author). In consideration of the action taken by the Philippine Journal of Otolaryngology Head and Neck Surgery in reviewing and editing this manuscript, I hereby assign, transfer and convey all rights, title and interest in the work, including copyright ownership, to the Philippine Society of Otolaryngology Head and Neck Surgery, Inc. (PSOHNS) in the event that this work is published by the PSOHNS. In making this assignment of ownership, I understand that all accepted manuscripts become the permanent property of the PSOHNS and may not be published elsewhere without written permission from the PSOHNS unless shared under the terms of a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) license.
