CC BY-NC-ND 4.0 · Laryngorhinootologie 2018; 97(S 02): S221
DOI: 10.1055/s-0038-1640479
Otologie: Otology
Georg Thieme Verlag KG Stuttgart · New York

Characterizing patients with Eustachian tube function measured in a hyperbaric and Hypobaric pressure chamber

M Meyer
1  Univ. HNO-Klinik, Gebäude 23, Köln
C Korthäuer
2  Uniklinik Köln, Köln
S Jansen
2  Uniklinik Köln, Köln
KB Hüttenbrink
2  Uniklinik Köln, Köln
D Beutner
3  Univ. HNO-Klinik, Göttingen
› Author Affiliations
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Publication History

Publication Date:
18 April 2018 (online)



Current consensus statement on Eustachian tube dysfunction (ETD) distinguishes between three subtypes of chronical ETD: dilatory ETD, baro-challenge-induced ETD, and patulous ETD. The determination of these subtypes in daily routines is based on symptoms of the patient, otoscopy, epipharyngoscopy, tympanometry, pure tone audiometry and Valsalva's test. On basis of these examinations it is often not sufficient to clearly diagnose the subtype. The pressure chamber was evaluated to determine different subtypes of ETD.


17 patients undergone a standardized pressure profile. During pressure increase and decrease the tympanic membrane impedance was measured and the pressure curve during the five-minute lasting measurement was analyzed.


By interpretation of the pattern of the continuous impedance of the tympanic membrane it was possible to distinguish between subtypes of ETD. Patients with patulous ETD and baro-challenged ETD could clearly be identified. The remaining patients were classified as dilatory ETD.


Patients suffering from ETD could be measured objectively in a pressure chamber. Subtypes of ETD could be identified. These results could add important additional information to the existing diagnostics and are a relevant preliminary work to identify and assess patients for different therapy Options in the future.