Publications by authors named "Seong-Hoon Bae"

Objective: The butterfly cartilage inlay technique was originally developed for repairing small tympanic membrane (TM) perforations but is now increasingly used for repairing large TM perforations. Although studies have evaluated the effectiveness of butterfly tympanoplasty for repairing medium-to-large-sized TM perforations, no study has compared its effectiveness with that of the conventional underlay cartilage technique. Therefore, we aimed to evaluate the effectiveness of butterfly tympanoplasty for repairing medium-to-large-sized TM perforations compared with that of the conventional underlay cartilage.

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  • This study analyzed the relationship between aging and tympanometric changes, specifically focusing on the prevalence of type C tympanograms in individuals aged 40 and older, using data from the Korea National Health and Nutrition Examination Survey (KNHANES) from 2019-2022.
  • The results showed a significant increase in the incidence of type C tympanograms with age, suggesting that aging is a major factor associated with middle ear dysfunction and potentially impacting hearing.
  • Additionally, individuals with type C tympanograms experienced worse hearing thresholds compared to those with type A tympanograms, highlighting the importance of tympanometric screening for early detection and management of hearing impairments in older adults.
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Objectives: The exclusive endoscopic transcanal transpromontorial approach (EETTA) has recently been developed for the removal of small-sized acoustic neuromas in the labyrinth (intralabyrinthine schwannoma [ILS]) or internal auditory canal (IAC). Although small tumors that meet the indications for EETTA are also good candidates for cochlear implantation (CI), there are few reports on CI after schwannoma removal using EETTA. Here we present an outcome of patients who underwent simultaneous EETTA and CI.

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  • Corticosteroid therapy, particularly with dexamethasone, is commonly suggested for treating acute facial nerve weakness, but its effectiveness for traumatic injuries is debated.
  • In a study with C57BL/6 mice, dexamethasone inhibited macrophage infiltration into facial nerves but slightly delayed overall functional recovery compared to a control group receiving saline.
  • The results indicate that while dexamethasone can limit certain cellular responses after injury, further research is necessary to confirm its clinical benefits for treating traumatic facial nerve injuries.
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Introduction: The modified nine-step test is a classical method for evaluating Eustachian tube function. However, clinical interpretation of the increased maximal difference in middle ear pressure (mdMEP) in the modified nine-step test is unknown. We hypothesised that the different reservoir effects of the mastoid cavity can bias the results of the modified nine-step test.

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  • Genetic testing and vestibular function tests were conducted on 627 patients with genetic hearing loss, revealing that 22.8% experienced vestibular symptoms.
  • Genetic variations were found in 31.5% of those with symptoms, linking 19 deafness genes to these vestibular issues, primarily vertigo.
  • Different tests indicated reduced vestibular function in various proportions of patients, with autosomal recessive cases showing significantly more abnormalities than autosomal dominant ones.
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Introduction: Previous studies have reported that hearing loss (HL) is associated with dementia, although the mechanistic underpinnings remain elusive. This study aimed to evaluate the changes in brain metabolism in patients with HL and different types of dementia.

Methods: Patients with cognitive impairment (CI) and HL treated at the university-based memory clinic from May 2016 to October 2021 were included.

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Introduction: Lateral semicircular canal (LSCC) dysplasia is the most common inner ear malformation. The severity of dysplasia can appear in various spectrums, from a short and broad LSCC with normal or small-sized central bony island (CBI) to a single fluid-filled cavity confluent with the vestibule without CBI. However, reports on the association between LSCC dysplasia and the loss of vestibular function are still lacking.

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Suggested several decades ago, the nine-step test is an intuitive test of Eustachian tube function. However, studies employing the nine-step test to assess the results of Eustachian tube balloon dilation (EBD) are limited. We aimed to objectively evaluate the efficacy of EBD in opening failure patients with decreased maximal peak pressure difference (MPD) using the nine-step test.

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Objectives: Congenital corpus callosum agenesis (CCA) is one of the congenital anomalies in newborns, which usually presents with syndromic features. It can be asymptomatic or have variable neurological deficits. Some studies demonstrated that hearing loss can occur in patients with CCA; however, the exact prevalence remains unclear.

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Background And Objectives: The speech tests used to evaluate language performance in patients with bilateral deafness (BiD) and cochlear implant (CI) are problematic if applied to patients with single-sided deafness (SSD) because normal ear hearing should be excluded. Thus, we investigated the feasibility of using wireless connection to evaluate speech intelligibility of the CI ear in patients with SSD. Subjects and.

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Objectives: We evaluated the long-term prognosis and risk factors associated with tinnitus and aural fullness, which occurred with sudden sensorineural hearing loss.

Study Design: Retrospective cross-sectional review.

Setting: Tertiary referral center.

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Introduction: The Carhart notch is a well-known sign of stapes fixation. However, previous studies have reported that the Carhart notch is not specific to stapes fixation and is also present in other middle ear diseases. Therefore, this study investigated the diagnostic value of threshold gap between air conduction and bone conduction (ABG) for stapes fixation, instead of the bone conduction dip representing the Carhart notch.

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Purpose: Facial nerve decompression surgery is performed on patients with immediate, complete traumatic facial palsy. However, the clinical advantage of the surgical treatment has weak evidence because of lack of control groups in previous studies. Therefore, this study compared facial function outcomes between the patients who underwent surgery and those who did not.

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Although the cleft palate is regarded as a contraindication for Eustachian tube ballooning, the presence of submucosal cleft palate may be overlooked while diagnosing Eustachian tube dysfunction. Therefore, we aimed to determine the incidence of the presence of a hard palate bony notch and vomer defect, which indicate the presence of submucosal cleft palate in patients with Eustachian tube dysfunction. In the Eustachian tube dysfunction group (n = 28), 4 patients (14.

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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.

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Article Synopsis
  • Cochlea macrophages play a crucial role in managing inflammation in the cochlea and may help protect against hearing damage due to sound exposure.
  • The study found that inflammatory monocytes begin to infiltrate the cochlea within 2 days after acoustic overstimulation, transforming into macrophages by days 3-5, while neutrophils are not significantly involved.
  • Early intervention targeting the immune response may be essential for preventing noise-induced hearing loss, as key inflammatory processes are activated soon after exposure to loud sounds.
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The nine-step test is a classical method for evaluating Eustachian tube function. It directly assesses the patient's capacity to equilibrate middle ear pressure by swallowing. However, there are insufficient studies to appraise its diagnostic performance.

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Objectives: Noise exposure leads to an increase in the macrophage population. This increment is thought to be caused by the transformation of infiltrated monocytes into macrophages rather than by proliferation of the cochlear resident macrophages. However, studies on infiltrated monocytes in the cochlea are scarce.

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Objectives: Common cavity deformity is a rare congenital bony labyrinth malformation associated with profound hearing loss. Cochlear implants are widely used for hearing rehabilitation for common cavity deformities; however, the reported prognosis is poor. Due to the deformed anatomical structure, it is important to consider the position of the electrodes to maximize the performance of the cochlear implant.

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Background And Objectives: Some reports propose an increased risk of otitis media and hearing impairment after total laryngectomy. However, the incidence of otitis media following laryngectomy and the mechanism remain unclear. This study aimed to identify the incidence and risk factors of otitis media after total laryngectomy.

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Chemical labyrinthectomy using gentamicin is a popular method for treating intractable vertigo attacks in Meniere's disease. However, the risk of hearing loss remains a major concern for clinicians. We investigated the effect of simultaneous dexamethasone and gentamicin application on hearing preservation and vertigo control in patients with intractable unilateral Meniere's disease.

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Unlabelled: Acoustic trauma induces an inflammatory response in the cochlea, resulting in debilitating hearing function. Clinically, amelioration of inflammation substantially prevents noise-induced hearing loss. The Limulus factor C, Cochlin, and Lgl1 (LCCL) peptide plays an important role in innate immunity during bacteria-induced inflammation in the cochlea.

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Vestibular schwannoma (VS) originates from Schwann cells in the superior or inferior vestibular nerve. Identifying the precise origin will help in determining the optimal surgical approach. We retrospectively analyzed the preoperative vestibular function test according to VS origin to determine whether the test is a valuable indicator of tumor origin.

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