Applications of visualizing cochlear basal turn in cochlear implantation.

Objective: To report a reliable method in obtaining optimal cochlear basal turn and cross-section (c/s) of internal auditory canal (IAC) supporting Cochlear implantation (CI) procedure.

Materials And Methods: Computer tomography (CT) and magnetic resonance image (MRI) scans of potential CI candidates from 2018 to 2022 from the tertiary center were considered for analysis. Slicer software was used in three-dimensional (3D) segmentation of inner ear and for capturing the cochlear basal turn.

[Prospects for cochlear implantation in patients with auditory nerve dysplasia].

Auditory nerve dysplasia (AND) can encompass various conditions of the auditory nerve (AN), ranging from true aplasia to hypoplasia. The purpose of this review is to discuss the prospect of cochlear implantation (CI) and subsequent auditory speech rehabilitation for AN abnormality. Studies of different authors when working with this category of children, possible results and methods of diagnostics of the AN condition are presented.

[Surgical tactic of cochlear implantation in patients with intraoperative CSF leakage].

Cochlear implantation (CI) is currently the recognized and most promising method of rehabilitation of patients suffering from profound hearing loss and deafness. During the surgical stage of CI, one of the most unpleasant intraoperative features is CSF leakage from the cochlea opening. Most often it occurs in patients with malformations of the inner ear, with temporal bone fractures and with cochlear otosclerosis.

[The influence of hearing and vestibular impairments on cognitive function in elderly people.].

Cognitive function is a complex brain function that is important in the cognition of the reality and connecting with it. It has a complicated reflex basis, arises from external factors exposure, improves by growing up and learning till its maximum and declines in the elderly age. For several years it was believed that cognitive function drop is connected with ageing processes of the whole organism.

Suitable Electrode Choice for Robotic-Assisted Cochlear Implant Surgery: A Systematic Literature Review of Manual Electrode Insertion Adverse Events.

Background And Objective: The cochlear implant (CI) electrode insertion process is a key step in CI surgery. One of the aims of advances in robotic-assisted CI surgery (RACIS) is to realize better cochlear structure preservation and to precisely control insertion. The aim of this literature review is to gain insight into electrode selection for RACIS by acquiring a thorough knowledge of electrode insertion and related complications from classic CI surgery involving a manual electrode insertion process.

[The significance of microanatomy of the round window in terms of cochlear implantation].

Sensoneural hearing loss is a polyetiological disease, which is often a secondary reflection of systemic pathology and is associated with damage of the cochlea and auditory nerve receptors. An important point in the surgical stage of cochlear implantation is the introduction of an implant active electrode into the cochleostomy spiral channel through the cochleostoma or round window. However, the issue of intra-cochlear structures surgical trauma in such surgical intervention seems to be very important, as it may reduce the success of subsequent rehabilitation.

Evidence for the formation of two types of oxygen interstitials in neutron-irradiated α-AlO single crystals.

Due to unique optical/mechanical properties and significant resistance to harsh radiation environments, corundum (α-AlO) is considered as a promising candidate material for windows and diagnostics in forthcoming fusion reactors. However, its properties are affected by radiation-induced (predominantly, by fast neutrons) structural defects. In this paper, we analyze thermal stability and recombination kinetics of primary Frenkel defects in anion sublattice - the F-type electronic centers and complementary oxygen interstitials in fast-neutron-irradiated corundum single crystals.

Two-phase survey on the frequency of use and safety of MRI for hearing implant recipients.

Purpose: Magnetic resonance imaging (MRI) is often used to visualize and diagnose soft tissues. Hearing implant (HI) recipients are likely to require at least one MRI scan during their lifetime. However, the MRI scanner can interact with the implant magnet, resulting in complications for the HI recipient.

Distinctive features of diffusion-controlled radiation defect recombination in stoichiometric magnesium aluminate spinel single crystals and transparent polycrystalline ceramics.

MgAlO spinel is important optical material for harsh radiation environment and other important applications. The kinetics of thermal annealing of the basic electron (F, F) and hole (V) centers in stoichiometric MgAlO spinel irradiated by fast neutrons and protons is analyzed in terms of diffusion-controlled bimolecular reactions. Properties of MgAlO single crystals and optical polycrystalline ceramics are compared.

The reliability of hearing implants: report on the type and incidence of cochlear implant failures.

This study presents the data collected through a database on the type and incidence of cochlear implant device failures and major complications and quantifies the risk of failures across time based on the Association for the Advancement of Medical Instrumentation (AAMI) CI86:2017 standard. Information on reliability of MED-EL cochlear implants was collected from the MED-EL complaint database between 2003 and2013. Explants were categorized and device reliability was calculated according to the AAMI CI86:2017 standard principles.

[Influence of hearing decline on cognitive function in elderly and senier age patients and its assessment after cochlear implantation (literature review).].

The study of the effect of cochlear implantation on cognitive function is an urgent problem, since the world is increasing the population of elderly and senile people who, as a rule, have certain hearing impairments. Age-related hearing loss is one of the most common health problems associated with aging, affecting two-thirds of people over the age of 70. However, few adults are tested for hearing loss, and even fewer are being treated.

Auditory Performances in Older and Younger Adult Cochlear Implant Recipients: Use of the HEARRING Registry.

Objective: To evaluate the hearing outcomes of cochlear implantation in different age groups by using data collected in the HEARRING registry.

Methods: A multicenter study. Data of 146 patients were collected in a HEARRING registry.

Manifestation of dipole-induced disorder in self-assembly of ferroelectric and ferromagnetic nanocubes.

The colloidal processing of nearly monodisperse and highly crystalline single-domain ferroelectric or ferromagnetic nanocubes is a promising route to produce superlattice structures for integration into next-generation devices, whereas controlling the local behaviour of nanocrystals is imperative for fabricating highly-ordered assemblies. The current picture of nanoscale polarization in individual nanocrystals suggests a potential presence of a significant dipolar interaction, but its role in the condensation of nanocubes is unknown. We simulate the self-assembly of colloidal dipolar nanocubes under osmotic compression and perform the microstructural characterization of their densified ensembles.

[Round window niche area anatomy in terms of cochlear implantation].

Cochlear implantation is the most effective method of rehabilitation of patients with a high degree of hearing loss and deafness. This is a complex, multi-stage way of rehabilitation that includes selection of candidates for surgical intervention, a surgical stage and postoperative long-term auditory rehabilitation. In carrying out the surgical stage of cochlear implantation the round window niche area is of great interest, since the variability of its anatomical features affects the access to scala tympani.

Successful application and timing of a remote network for intraoperative objective measurements during cochlear implantation surgery.

Objective: To determine the time needed to remotely perform a set of intraoperative measurements during cochlear implantation surgery and to compare it to the time needed to perform the same measurements in theatre.

Design: Prospective two-arm study comparing a local with a remote measurement setting. Three intraoperative measurements (Impedance Field Telemetry (IFT), evoked compound action potential (ECAP) and evoked stapedius reflex test (eSRT)) were performed with the audiologist present in the operating theatre (i.

Anomalous Kinetics of Diffusion-Controlled Defect Annealing in Irradiated Ionic Solids.

The annealing kinetics of the primary electronic F-type color centers (oxygen vacancies with trapped one or two electrons) is analyzed for three ionic materials (AlO, MgO, and MgF) exposed to intensive irradiation by electrons, neutrons, and heavy swift ions. Phenomenological theory of diffusion-controlled recombination of the F-type centers with much more mobile interstitial ions (complementary hole centers) allows us to extract from experimental data the migration energy of interstitials and pre-exponential factor of diffusion. The obtained migration energies are compared with available first-principles calculations.

Hearing preservation cochlear implantation in children: The HEARRING Group consensus and practice guide.

Objectives: To provide multidisciplinary cochlear implant teams with a current consensus statement to support hearing preservation cochlear implantation (HPCI) in children, including those children with symptomatic partial deafness (PD) where the intention is to use electric-acoustic stimulation (EAS). The main objectives are to provide guidelines on who is a candidate, how to assess these children and when to implant if Med-El Flex electrode arrays are chosen for implantation.

Methods: The HEARRING group reviewed the current evidence and practice regarding the management of children to be considered for HPCI surgery emphasizing the assessment needed prior to implantation in order to demonstrate the benefits in these children over time.

[Topographic anatomy of the hook region and its significance for the choice of the surgical technique for the cochlear implantation].

The mode of the introduction of the active electrode of a cochlear implant into the cochlea remains a key issue as far as cochlear implantation is concerned. Especially much attention has recently been given to the relationship between the anatomical features of the basal region of the cochlea (the so-called 'fish hook') and the possibility to approach it. We have undertaken the attempt to optimize the approach to the tympanic canal (scala tympanica) of the cochlea with a view to reducing to a minimum the risk of an injury to the cochlear structures in the course of cochlear implantation.

Electrically evoked compound action potentials are different depending on the site of cochlear stimulation.

One of the many parameters that can affect cochlear implant (CI) users' performance is the site of presentation of electrical stimulation, from the CI, to the auditory nerve. Evoked compound action potential (ECAP) measurements are commonly used to verify nerve function by stimulating one electrode contact in the cochlea and recording the resulting action potentials on the other contacts of the electrode array. The present study aimed to determine if the ECAP amplitude differs between the apical, middle, and basal region of the cochlea, if double peak potentials were more likely in the apex than the basal region of the cochlea, and if there were differences in the ECAP threshold and recovery function across the cochlea.

[The use of thresholds of electrically evoked short-latent auditory potentials for the adjustment of the speech processors in the patients undergoing cochlear implantation].

The objective of the present study was to determine the thresholds of electrically evoked short-latent auditory potentials by the mathematical method and to elucidate the relationship between these parameters and the subjective maximally comfortable levels in the patients undergoing cochlear implantation. The electrically evoked short-latent auditory potentials were recorded in two groups of patients with different stimulation frequency (17 and 43 Hz). The use of the mathematical method of linear regression of the amplitude (peak V) growth function for determining the thresholds of electrically evoked short-latent auditory potentials has a number of advantages over visual detection of the threshold level.

The Mi1000 CONCERTO PIN cochlear implant: An evaluation of its safety and stability in adults and children.

Conclusion The study demonstrates the medium-term stability and safety of the CONCERTO PIN cochlear implant. The use of the CONCERTO PIN proved to be suitable for the use of a surgical technique without the need for suture fixation and resulted in short surgery duration and a low medium-term complication rate. Objective The primary aim was to provide data on medium-term safety and stability of the CONCERTO PIN cochlear implant in adults and children, and to collect feedback on the surgical technique used, which involved no drilling and no suture fixation.

Quality standards for bone conduction implants.

Conclusion: Bone conduction implants are useful in patients with conductive and mixed hearing loss for whom conventional surgery or hearing aids are no longer an option. They may also be used in patients affected by single-sided deafness.

Objectives: To establish a consensus on the quality standards required for centers willing to create a bone conduction implant program.

Static and dynamic screening effects in the electrostatic self-assembly of nano-particles.

In the description of charge screening in the electrostatic self-assembly of nanoparticles (molecules) embedded into a polar solvent, the static screening effects (a contribution associated with the rapid spatial redistribution of small and highly mobile ions of a solvent) are traditionally treated phenomenologically, using the Yukawa short-range potential for describing the interaction between these particles. However, this model has a limited range of applicability being valid only for infinitely diluted systems and high salt concentrations. During a slow self-assembling process with nanoparticle formation, very dense structural elements (aggregates) are formed, in which the distances between the nanoparticles could become comparable to the Debye radius in the Yukawa potential.

Theory of non-equilibrium critical phenomena in three-dimensional condensed systems of charged mobile nanoparticles.

A study of 3d electrostatic self-assembly (SA) in systems of charged nanoparticles (NPs) is one of the most difficult theoretical problems. In particular, the limiting case of negligible or very low polar media (e.g.

Remote programming of MED-EL cochlear implants: users' and professionals' evaluation of the remote programming experience.

Conclusion: Remote programming is safe and is well received by health-care professionals and cochlear implant (CI) users. It can be adopted into clinic routine as an alternative to face-to-face programming.

Objectives: Telemedicine allows a patient to be treated anywhere in the world.