Various types of bone conduction hearing aids have been widely used for hearing rehabilitation for the last 30 years. Among them, the recently launched Osia®2 system is a new active transcutaneous bone conduction implant system using piezoelectric effect. This can be expected to deliver more efficient sound transmission, overcome sound attenuation, and improve high-frequency hearing than conventional passive transcutaneous hearing aids, and is considered to be cosmetically superior to percutaneous hearing aids. Recently, we experienced two cases of Osia®2 implantation in patients with iatrogenic unilateral hearing loss. Both patients showed improved pure tone threshold and better Korean Hearing in Noise Test (K-HINT) score after implantation. Furthermore, all of them had no complications after Osia®2 implantation.

Background and Objectives: We investigated the clinical validity of and correlation between the Eustachian Tube Dysfunction Questionnaire-7 (ETDQ-7) scores and the eustachian tube function test (ETFT) results in patients with a normal drum. Subjects and Methods: The study included 49 patients (93 ears) with unilateral or bilateral ear fullness over >3 months. All patients were administered the ETDQ-7 survey and underwent the ETFT on the same day. The receiver operating characteristic (ROC) curve and the association between the results were statistically analyzed. Results: ETDQ-7 scores were not significantly correlated with the ETFT results or with middle ear pressure. ETDQ-7 scores in patients with eustachian tube dysfunction (ETD) were significantly higher than those in patients with normal ETFT results (p=0.039) when ETD was defined as a pressure change <10 daPa on the ETFT. The area under the ROC curve was 0.631, with a sensitivity of 37.0% and specificity of 89.4%. Conclusions The ETDQ-7 has limited clinical significance in patients with ETD but a normal drum. Therefore, concomitant objective tests should be performed to diagnose patients with ETD.