2.3. Tympanometry
OME
Tympanometry was performed before and on after the intervention (the third day of the inhalation). Tympanograms were obtained using the Interacoustics Titan Clinical device and Titan Suite Software (Interacoustics A/S, Middelfart, Denmark). We measured the following parameters: volume (normal range: <2.5 mL), compliance (normal range: 0.3–1.5 mL), pressure (normal range: [-]100–100 daPa), gradient (normal range: <150 daPa), tympanogram type (Jerger’s classification: A, B, C1, C2).Tympanograms B and C2 were interpreted as OME. Tympanogram C1 was interpreted as a regurgitation of the ET. Normalization was defined as a conversion from B/C1/C2 to A and B/C2 to C1 tympanogram. A transition from B to C2 was interpreted as improvement, and a transition from C1/C2 to B or from A to B/C1/C2 was interpreted as deterioration. The persistence of the same tympanogram type was interpreted as no change. The patients with normalization and improvement were considered responders, while those with no change or deterioration were considered non-responders.