Efficacy of 100 hz sound stimulation on saccular dysfunction in meniere's disease.

Background: Although various medical remedies have been attempted to alleviate the symptoms of Meniere's disease (MD), the risk-benefit ratios of these various treatments remain debatable.

Objective: We investigated the efficacy of sound stimulation of 100 Hz for treating vestibular dysfunction in patients with Meniere's disease (MD).

Materials And Methods: Patients with definitive MD with intractable vestibular symptoms and endolymphatic hydrops (EH) in the inner ear were evaluated.

Lifestyle habits and examination findings before and during the COVID-19 pandemic: From health checkups in a rural area in Japan.

Few health checkup studies have reported lifestyle habits and examination results before and during the COVID-19 pandemic. We compared lifestyle habits and examination results surveyed before and during the COVID-19 pandemic. Five hundred and ten and 396 participants attended the health checkup in 2019 and 2022, respectively.

Significance of an augmented response on cervical vestibular evoked myogenic potential testing in Meniere's disease.

The potential mechanism of augmented response on cervical vestibular evoked myogenic potential (cVEMP) testing and its decrease following treatment in a patient with Meniere's disease (MD) are discussed. Changes of static posturography and cVEMP testing before and after a glycerol drip in a 69-year-old man with unilateral MD, in which significant endolymphatic hydrops (EH) was confirmed on magnetic resonance imaging (MRI) on the diseased side, were evaluated. Values of total locus lengths, areas of postural sway, and their Romberg ratios were decreased after the glycerol drip.

Relationship between tinnitus and olfactory dysfunction: audiovisual, olfactory, and medical examinations.

Introduction: Sensory dysfunctions and cognitive impairments are related to each other. Although a relationship between tinnitus and subjective olfactory dysfunction has been reported, there have been no reports investigating the relationship between tinnitus and olfactory test results.

Methods: To investigate the relationship between tinnitus and olfactory test results, we conducted sensory tests, including hearing and visual examinations.

O-labeled water distribution in the human inner ear: Insights into lymphatic dynamics and vestibular function.

We evaluated the inner ear distribution of O-labeled saline administered to the human tympanic cavity. Magnetic resonance imaging was performed after intratympanic administration in five healthy volunteers and one patient with cochlear endolymphatic hydrops. In all volunteers, O-labeled water permeated the cochlear basal turn and vestibule at 30 min and disappeared gradually within 2-4 h.

Dietary habits and medical examination findings in Japanese adults middle-aged or older who live alone.

Objective: The influence of living alone on multiple food and nutrition behaviors across a range of ages and genders has not been sufficiently investigated. Moreover, to our knowledge, no studies have described both dietary status and medical examination findings in persons living alone. Among individuals who attended a health checkup in a rural town in Japan, we investigated dietary habits and medical examination findings in persons living alone and those living with one or more other persons.

Dilatation of the Endolymphatic Space in the Ampulla of the Posterior Semicircular Canal: A New Clinical Finding Detected on Magnetic Resonance Imaging.

Objectives: To investigate the clinical features of ears with dilatation of the endolymphatic space in the ampulla of the posterior semicircular canal on magnetic resonance imaging.

Study Design: Retrospective study.

Setting: A university hospital.

Relationship between cognitive impairment and olfactory function among older adults with olfactory impairment.

Objective: Understanding the relationships among aging, cognitive function, and olfaction may be useful for diagnosing olfactory decline in older adults. Olfactory function declines in the early stage of neurodegenerative diseases, including Alzheimer's and Parkinson's diseases. Aging and cognitive impairment are associated with olfactory decline.

Hearing impairment is associated with cognitive function in community-dwelling older adults: A cross-sectional study.

Background: Hearing impairment (HI) is associated with dementia. However, the cognitive screening tasks effective in older community dwellers presenting with HI are unclear.

Methods: We retrospectively and cross-sectionally investigated the associations between HI and cognitive function assessed with screening tasks using data from two healthcare check-up programs for community dwellers ≥65 years old in 2018.

Prevalence of laryngopharyngeal reflux symptoms: comparison between health checkup examinees and patients with otitis media.

Objective: To investigate the prevalence of laryngopharyngeal reflux (LPR) symptoms in health checkup examinees and in patients with otitis media with effusion (OME) of undetermined etiology and the significance of age, body mass index (BMI), and pepsinogen (PG) concentration in middle ear effusions (MEEs).

Study Design: Cross-sectional study.

Setting: Health checkup and private clinics.

Audiological signs in pediatric cases with dehiscence of the bony labyrinth caused by a high jugular bulb.

Clinical findings were assessed in three pediatric cases of dehiscence of the bony labyrinth caused by a high jugular bulb (HJB). Two children had two dehiscent lesions, which included posterior semicircular canal dehiscence (PSCD) and vestibular aqueduct dehiscence (VAD). One child had VAD alone.

Association between endolymphatic hydrops as revealed by magnetic resonance imaging and caloric response.

Objective: To investigate the association between the degree of endolymphatic hydrops (EH) revealed by magnetic resonance imaging (MRI) and a caloric response in the ear.

Study Design: Prospective diagnostic study.

Setting: University hospital.

Relationship between endolymphatic hydrops and vestibular-evoked myogenic potential.

Conclusion: Vestibular-evoked myogenic potential (VEMP) can be used to examine endolymphatic hydrops, especially in the vestibule.

Objective: To investigate the relationship between the degree of endolymphatic hydrops revealed by magnetic resonance imaging (MRI) and VEMP.

Methods: Gadolinium diluted with saline was injected intratympanically in 49 ears (40 patients).

Relationship between the degree of endolymphatic hydrops and electrocochleography.

The purpose of this study was to evaluate the relationship between the endolymphatic space image obtained using magnetic resonance imaging (MRI) and the results of electrocochleography. Electrocochleography recordings were obtained from 25 ears of 24 patients, who underwent MRI 1 day after the intratympanic injection of gadolinium diethylenetriamine pentaacetic acid bismethylamide. The average summating potential to action potential (SP/AP) ratio in patients with significant endolymphatic hydrops in the cochlea was 54 +/- 17%.

Endolymphatic space imaging in patients with delayed endolymphatic hydrops.

Conclusion: Magnetic resonance imaging (MRI) after intratympanic gadolinium injection can reveal endolymphatic hydrops (ELH) in patients with delayed ELH (DELH). Patients with contralateral DELH may have bilateral ELH.

Objective: DELH has previously been diagnosed based on clinical history, hearing and vestibular examinations.

Changes in endolymphatic hydrops in a patient with Meniere's disease observed using magnetic resonance imaging.

We describe a case report of a patient with Meniere's disease whose changes in endolymphatic hydrops were observed using magnetic resonance imaging (MRI). Gadolinium was injected intratympanically through the tympanic membrane, and MRI scans performed with a 3-T MRI unit revealed endolymphatic hydrops inside the perilymphatic space filled with gadolinium. We evaluated the relationship between the image findings and hearing level.

Image evaluation of endolymphatic space in fluctuating hearing loss without vertigo.

The objective of the present study was to investigate endolymphatic space images in patients with fluctuating hearing loss without vertigo, and to elucidate its underlying pathophysiology. Eight patients with fluctuating hearing loss without vertigo were included in this study. 3T MRI was taken, 24 h after intratympanic injection of gadolinium-diethylenetriamine pentaacetic acid (Gd-DTPA).

3D computerized model of endolymphatic hydrops from specimens of temporal bone.

Conclusion: The 3D models of endolymphatic and perilymphatic spaces enabled us to obtain normal and pathological volumes of each space and helped us to understand the 3D structure of various parts of the inner ear and of endolymphatic hydrops.

Objective: To make a 3D model of the inner ear using sections of temporal bone with and without hydrops.

Materials And Methods: Every 10th 20 microm thick section of temporal bone was collected from two ears with endolymphatic hydrops and five ears without hydrops.

Clinical significance of endolymphatic imaging after intratympanic gadolinium injection.

Conclusion: Using three-dimensional real inversion recovery (3D-real IR) and three-dimensional fluid-attenuated inversion recovery (3D-FLAIR) magnetic resonance imaging (MRI), various degrees of endolymphatic hydrops were observed in the basal and upper turns of the cochlea and in the vestibular apparatus after intratympanic gadolinium (Gd) injection. MRI may contribute to our understanding of inner ear diseases and may be a useful addition to intratympanic drug therapy in the management of inner ear diseases.

Objective: To evaluate 3D-real IR MRI and 3D-FLAIR MRI with clinical symptoms and signs in patients with inner ear disease.

Evaluation of the vestibular evoked myogenic potential during parabolic flight in humans.

The purpose of this study was to investigate how gravity affects the vestibular evoked myogenic potential (VEMP). Eight healthy subjects (seven men, one woman; age range 19-45 years) participated in experiments in which three different gravity levels [microgravity (MG), normal gravity (NG), and hypergravity (HG)] were imposed during a parabolic flight procedure. The VEMP was evoked in response to an intense mono-aural click while the subjects kept the sternocleidomastoid (SCM) muscle contracted bilaterally.

Effects of nasal surgery on sleep quality in obstructive sleep apnea syndrome with nasal obstruction.

Background: The purpose of this study was to evaluate the effects of nasal surgery on nasal resistance, sleep apnea, and sleep quality in adult male patients with obstructive sleep apnea syndrome (OSAS). A prospective study was performed in OSAS patients who underwent isolated nasal surgery in a tertiary referral center.

Methods: During the 3-year study period, 49 OSAS patients suffering from symptomatic nasal obstruction/impaired nasal breathing underwent the standard polysomnography before and after surgery.

Otoacoustic emissions, ear fullness and tinnitus in the recovery course of sudden deafness.

Objective: This study aimed to investigate how the symptoms of ear fullness, tinnitus and otoacoustic emissions (OAE) change in relation to the recovery course of pure tone audiometry thresholds (PTA) in sudden deafness (SD).

Methods: This study analyzed follow-up data on ear fullness, tinnitus and otoacoustic emissions of eight SD patients with good hearing improvement (Group A) and eight SD patients with poor hearing improvement (Group B) in an attempt to elucidate the behavior of these symptoms in their recovery course. This study was done until there was no change in the PTA for more than 1 week and hearing recovery was no longer expected.

Thirty-year trends in sudden deafness from four nationwide epidemiological surveys in Japan.

Conclusions: The estimated annual number of patients with sudden deafness treated in Japan has increased during the last 30 years, especially in the elderly population. Hypertension and diabetes mellitus could contribute to the etiology of this disorder.

Objectives: To investigate the epidemiological trends of sudden deafness in Japan over the past 30 years by analyzing data from national surveys.

Reduced nasal resistance after simple tonsillectomy in patients with obstructive sleep apnea.

Background: The aim of this study was to investigate the effects of simple tonsillectomy on nasal resistance in patients with obstructive sleep apnea syndrome (OSAS).

Methods: Conventional tonsillectomy was performed in 20 patients who were refractory to treatment with continuous positive airway pressure. The subjects consisted of 17 men and 3 women (mean age, 32.