Does Intraoperative Extracochlear Electrocochleography Correlate With Postoperative Audiometric Hearing Thresholds in Cochlear Implant Surgery? A Retrospective Analysis of Cochlear Monitoring.

In recent years, tools for early detection of irreversible trauma to the basilar membrane during hearing preservation cochlear implant (CI) surgery were established in several clinics. A link with the degree of postoperative hearing preservation in patients was investigated, but patient populations were usually small. Therefore, this study's aim was to analyze data from intraoperative extracochlear electrocochleography (ECochG) recordings for a larger group.

Towards single-trial classification of invasively recorded auditory evoked potentials in cochlear implant users.

One promising approach towards further improving cochlear implants (CI) is to use brain signals controlling the device in order to close the auditory loop. Initial electroencephalography (EEG) studies have already shown promising results. However, they are based on noninvasive measurements, whereas implanted electrodes are expected to be more convenient in terms of everyday-life usability.

Particle-Based Numerical Simulation Study of Solid Particle Erosion of Ductile Materials Leading to an Erosion Model, Including the Particle Shape Effect.

Solid particle erosion inevitably occurs if a gas-solid or liquid-solid mixture is in contact with a surface, e.g., in pneumatic conveyors.

Thymomectomy plus total thymectomy versus simple thymomectomy for early-stage thymoma without myasthenia gravis: a European Society of Thoracic Surgeons Thymic Working Group Study.

Objectives: Resection of thymic tumours including the removal of both the tumour and the thymus gland (thymothymectomy; TT) is the procedure of choice and is recommended in most relevant articles in the literature. Nevertheless, in recent years, some authors have suggested that resection of the tumour (simple thymomectomy; ST) may suffice from an oncological standpoint in patients with early-stage thymoma who do not have myasthenia gravis (MG) (non-MG). The goal of our study was to compare the short- and long-term outcomes of ST versus TT in non-MG early-stage thymomas using the European Society of Thoracic Surgeons thymic database.

Primary tracheal microcystic reticular schwannoma - Case report of a rare neurogenic tumor treated by segmental tracheal resection.

Introduction And Importance: Diagnosis and treatment of rare diseases are challenging because experience and evidence are limited. Primary tracheal tumors have a low prevalence but awareness of these is important to avoid misdiagnoses. We present a first case of a tracheal microcystic reticular schwannoma in which diagnosis and treatment recommendations were revised several times resulting in months of anxious uncertainty for the patient before complete resection and extensive histopathologic examination were performed.

Comparison of superelastic nitinol stapes prostheses and platin teflon stapes prostheses.

Introduction: Stapes plasty is an established procedure to improve hearing in case of otosclerosis. By reinforcing the prostheses, an optimization of the prosthesis could be achieved. The aim of the study was to evaluate the audiological results of the Nitinol Superelastic stapes prosthesis compared with a Platin-Teflon prosthesis.

Epidural recordings in cochlear implant users.

Objective: In the long term it is desirable for CI users to control their device via brain signals. A possible strategy is the use of auditory evoked potentials (AEPs). Several studies have shown the suitability of auditory paradigms for such an approach.

[Implementation of a SharePoint-based quality-assured document control system to achieve optimized patient safety].

Background: Where the facts relating to a patient's case are not unambiguously laid out, this constitutes a risk for the patient. A requirement, therefore, in the many documents necessitated by a given therapy is to achieve unambiguity, thus avoiding risks and enhancing the safety of treatment. The aim of this study was to arrive at this unambiguity using a systematic approach.

Preliminary Study on Antinuclear Antibodies in Patients With Chronic Dilatory Eustachian Tube Dysfunction.

Background And Hypothesis: There are some known reasons for chronic dilatory Eustachian tube dysfunction (chronic D-ETD, also known as chronic obstructive tube dysfunction), for example infections, hyperplastic adenoids, or tumors. In many cases though, none of these reasons apply. The question arises whether there might be an autoimmune pathogenesis in patients with idiopathic chronic D-ETD.

Cochlear Implantation in Organ Transplant Recipients.

Objective: Immunosuppressed individuals who have undergone organ transplants, especially children, pose particular challenges in terms of treatment. The aim of this study was to analyze the postoperative complication rate of organ transplant recipients who have also received a cochlear implant (CI).

Study Design: Retrospective case series.

[Certification of a University Department of Otolaryngology according to DIN EN ISO 9001:2008].

Introduction: Quality management (QM) is a control tool for the implementation of a wide range of organizational measures aimed at achieving process orientation and process optimization. The organizational framework for these measures can be structured to fulfill the requirements of certification to the DIN EN ISO 9001 standard. The objective was to implement this tool within a university otorhinolaryngology department.

Prescribed Velocity Gradients for Highly Viscous SPH Fluids with Vorticity Diffusion.

Working with prescribed velocity gradients is a promising approach to efficiently and robustly simulate highly viscous SPH fluids. Such approaches allow to explicitly and independently process shear rate, spin, and expansion rate. This can be used to, e.

Evidence and evidence gaps in the treatment of Eustachian tube dysfunction and otitis media.

Evidence-based medicine is an approach to medical treatment intended to optimize patient-oriented decision-making on the basis of empirically proven effectiveness. For this purpose, a classification system has been established to categorize studies - and hence therapy options - in respect of associated evidence according to defined criteria. The Eustachian tube connects the nasopharynx with the middle ear cavity.

Radiologic detectability of the cochlear implant electrode fixation clip using cone beam computed tomography.

Introduction: With the aim of preventing migration of cochlear implantation electrodes in the postoperative course, an electrode fixation clip has been developed. It is characterized by two clips of double U-geometry. The bone fixation clip will be clamped on the bony incus bridge, and the electrode fixation clip is clamped to the electrode lead.

Facial palsy following cochlear implantation.

Owing to its anatomical location, the facial nerve (FN) is at risk of damage during cochlear implantation, especially during posterior tympanotomy. The aim of this study was, therefore, to evaluate the risk of FN palsy following cochlear implantation surgery via mastoidectomy and posterior tympanotomy approach (facial recess). This is a retrospective study.

[Evidence and Evidence Gaps in the Treatment of Eustachian Tube Dysfunction and Otitis Media].

Evidence-based medicine is an approach to medical treatment intended to optimise patient-oriented decision-making on the basis of empirically proven effectiveness. For this purpose, a classification system has been established to categorise studies - and hence therapy options - in respect of associated evidence according to defined criteria. The Eustachian tube connects the nasopharynx with the middle ear cavity.

[The Marketing of Healthcare Services in ENT-Clinics].

Objective: The provision of healthcare services in Germany is based on fundamental principles of solidarity and is highly regulated. The question arises which conditions exist for marketing for healthcare services in ENT-clinics in Germany.

Material And Methods: The marketing options will be elicited using environmentally analytical considerations.

Effects of Signal-to-Noise Ratio on Auditory Cortical Frequency Processing.

Unlabelled: The neural mechanisms that support the robust processing of acoustic signals in the presence of background noise in the auditory system remain largely unresolved. Psychophysical experiments have shown that signal detection is influenced by the signal-to-noise ratio (SNR) and the overall stimulus level, but this relationship has not been fully characterized. We evaluated the neural representation of frequency in rat primary auditory cortex by constructing tonal frequency response areas (FRAs) in primary auditory cortex for different SNRs, tone levels, and noise levels.

Impact of Elevation of Temporal Lobe During Middle Fossa Acoustic Neuroma Surgery on Contralateral Speech Discrimination.

Aim: For middle fossa acoustic neuroma approach, retractors are needed to elevate the temporal lobe to be able to access the internal auditory meatus. The temporal lobe hosts the primary and secondary auditory fields. The question arises regarding whether this elevation affects the functionality of the auditory cortex.

Subtotal petrosectomy and Codacs™: new possibilities in ears with chronic infection.

Subtotal petrosectomy combined with obliteration of the tympanomastoid is a standard procedure to treat temporal bones in patients with radical cavity and chronic infections. Currently, patients with profound-to-severe sensorineural hearing loss are often fitted with cochlear implants. In the case of profound mixed hearing loss, active middle ear implants have been used successfully.

[Group phenomena in medical decisions--an analysis among residents of a department of otolaryngology].

Objective: Group phenomena concern the behaviour of particular groups which differs from that of individuals. One relevant phenomenon is the 'risky shift', which describes the observation of groups making riskier decisions than individuals. These phenomena have not been investigated for German physicians as yet.