Diagnostic value of computed tomography of the temporal bone in Eustachian tube dysfunction [article]

Savvas Kourtidis, Universitaet Tuebingen, Preyer, Serena (Prof. Dr.)
2020
5. Abstract Objectives i. Investigate whether morphologic measurements of Eustachian tubes on computed tomography scans are correlated with Eustachian tube dysfunc-tion scores. ii. Investigate whether sinonasal or middle ear radiological findings on tem-poral bone computed tomography are associated with the side of Eusta-chian tube dysfunction. iii. Determine the diagnostic validity of the computed tomography scan as a screening tool for Eustachian tube dysfunction. Study design Prospective,
more » ... ss-sectional case series study in a tertiary referral centre (ViD-ia Christian Hospitals Karlsruhe). Methods The study included forty patients with clinically diagnosed unilateral Eusta-chian tube dysfunction, verified through Eustachian tube score – 7 and Eusta-chian tube dysfunction questionnaire – 7. Each patient underwent pre-interventional radiological assessment by tem-poral bone computed tomography while performing a Valsalva-maneuver to enhance visualization of Eustachian tube lumen. The complete course of Eu-stachian tube, from the epipharynx to the middle ear cleft was included in the scanning field. A curved planar reconstruction delineated the Eustachian tubes and 3D mod-els were constructed using volume rendering software. Seven morphological parameters were independently measured for each Eustachian tube by two board-certified neuroradiologists blinded to the side of pathology: the cross-sectional size of the tympanic and pharyngeal orifice, visualization length of cartilaginous, bony and overall Eustachian tube lumen as well as inclination angle to Frankfurt horizontal plane and curvature angle of the S-shaped Eu-stachian Tube. Furthermore, the Eustachian tubes were analyzed for inter-side morphological differences, presence of mucus in the lumen or middle ear cleft and secretion retention or mucosal swelling in the adjacent sinuses. Finally, a radiological statement about the side of pathology was delivered, always blinded to the clinical diagnosis. Statistical correlation studies between morphological meas [...]
doi:10.15496/publikation-49964 fatcat:xgpcn27xcrbcxlbcqusll6b4yu