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    Wyświetlanie 1-8 z 8
    Tytuł:
    Acoustic neuroma as first sign of inner ear functional disorders
    Autorzy:
    Bielińska, Marzena
    Owczarek, Kalina
    Nowosielska-Grygiel, Joanna
    Olszewski, Jurek
    Pietkiewicz, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/1398592.pdf
    Data publikacji:
    2016
    Wydawca:
    Index Copernicus International
    Tematy:
    neuroma
    vestibulocochlear nerve
    inner ear functional disorders
    Opis:
    Introduction. The aim of this work was to describe acoustic neuromas as the first signs of inner ear functional disorders. Material and methods. The study covered 3,456 audiological and otoneurological patients, who were treated in the Department of Otolaryngology, Laryngological Oncology, Audiology and Phoniatrics Military Medical Academy University Teaching Hospital in Lodz within the period of 2011–2016. Among the studied subjects, an acoustic neuroma on the vestibulocochlear nerve was diagnosed in 13 cases (5,16%), including 9 women and 4 men. Each patient underwent a medical interview and an objective examination with static and dynamic tests, pure tone audiometry and speech audiometry tests, impedance audiometry tests, characteristics of tinnitus, videonystagmography and auditory brainstem evoked potentials (ABR) in crack. In each case of an incorrect ABR recording, contrast-enhanced MRI was performed. Study results. The conducted tests showed an incorrect ABR recording in 252 patients (7,29%, including 54,37% women and 45,63% men). In the performed contrast-enhanced MRI, 13 patients (5,16%), including 3,57% women and 1,59% men, had an image typical to neuroma of the vestibulocochlear nerve. Each one of the studied patients showed signs and symptoms typical to an acoustic neuroma such as hypoacusia and balance disorders, tinnitus in 12 subjects, headaches in the temporal and occipital area in 4 subjects, trigeminal neuralgia symptoms in 2 subjects and vision problems like scotoma and blurred vision reported by 1 patient. Conclusion. Each case of sensorineural hearing loss, particularly unilateral sensorineural hearing loss, requires expanded hearing tests and auditory brainstem evoked potentials tests. An incorrect brainstem evoked potentials recording such as: an elongated latency of the 5th wave, an elongated interlatency of 1–2-3 and 1–2–3–4 waves, requires a contract-enhanced magnetic resonance imaging to diagnose cerebellopontine angle tumours.
    Źródło:
    Polish Journal of Otolaryngology; 2016, 70, 5; 19-25
    0030-6657
    2300-8423
    Pojawia się w:
    Polish Journal of Otolaryngology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An alternative 3D numerical method to study the biomechanical behaviour of the human inner ear semicircular canal
    Autorzy:
    Santos, C. F.
    Belinha, J.
    Gentil, F.
    Parente, M.
    Jorge, R. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/951835.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    biomechanika
    FEM
    mechanika płynów
    narząd przedsionkowy
    ucho wewnętrzne
    vertigo
    biomechanics
    finite element method
    human vestibular system
    fluid mechanics
    inner ear
    Opis:
    Purpose: The vestibular system is the part of the inner ear responsible for balance. Vertigo and dizziness are generally caused by vestibular disorders and are very common symptoms in people over 60 years old. One of the most efficient treatments at the moment is vestibular rehabilitation, permitting to improve the symptoms. However, this rehabilitation therapy is a highly empirical process, which needs to be enhanced and better understood. Methods: This work studies the vestibular system using an alternative computational approach. Thus, part of the vestibular system is simulated with a three dimensional numerical model. Then, for the first time using a combination of two discretization techniques (the finite element method and the smoothed particle hydrodynamics method), it is possible to simulate the transient behavior of the fluid inside one of the canals of the vestibular system. Results: The obtained numerical results are presented and compared with the available literature. The fluid/solid interaction in the model occurs as expected with the methods applied. The results obtained with the semicircular canal model, with the same boundary conditions, are similar to the solutions obtained by other authors. Conclusions: The numerical technique presented here represents a step forward in the biomechanical study of the vestibular system, which in the future will allow the existing rehabilitation techniques to be improved.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2017, 19, 1; 3-15
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bone conduction stimulation of the otic capsule: a finite element model of the temporal bone
    Autorzy:
    Borkowski, Paweł
    Marek, Piotr
    Niemczyk, Kazimierz
    Lachowska, Magdalena
    Kwacz, Monika
    Wysocki, Jarosław
    Powiązania:
    https://bibliotekanauki.pl/articles/306896.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    FEM
    kośc skroniowa
    ucho wewnętrzne
    bone conduction
    finite element analysis
    temporal bone
    otic capsule
    cochlea
    inner ear
    Opis:
    Bone conduction stimulation applied on the otic capsule may be used in a conductive hearing loss treatment as an alternative to the bone conduction implants in clinical practice. A finite element study was used to evaluate the force amplitude and direction needed for the stimulation. Methods: A finite element model of a female temporal bone with a precisely reconstructed cochlea was subjected to a harmonic analysis assuming two types of stimulation. At first, the displacement amplitude in the form of air conduction stimulation was applied on the stapes footplate. Then the force amplitude was applied on the otic capsule in the form of bone conduction stimulation. The two force directions were considered: 1) the primary direction, when a typical opening is performed during mastoidectomy, and was coincident with the axis of an imaginary cone, inscribed in the opening, and 2) the direction perpendicular to the stapes footplate. The force amplitude was set so that the response from the cochlea corresponded to the result of air conduction stimulation applied on the stapes footplate. Results: The amplitude and phase of vibration and the volume displacement on the round window membrane were considered as well as vibrations of the basilar membrane, spiral lamina, and promontory. Conclusions: The cochlear response was comparable for the two types of stimulation. The efficiency of bone conduction stimulation depended on the force direction. For the primary direction, the force was a few times smaller than for the direction perpendicular to the stapes footplate.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2019, 21, 3; 75-86
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Endolymphatic Hydrops, Evaluated Using 3T MRI in Patients with Clinically Confirmed Meniere Disease
    Autorzy:
    Jasińska, Agnieszka
    Wnuk, Emilia
    Pierchała, Katarzyna
    Niemczyk, Kazimierz
    Powiązania:
    https://bibliotekanauki.pl/articles/1399638.pdf
    Data publikacji:
    2019
    Wydawca:
    Index Copernicus International
    Tematy:
    endolymphatic hydrops
    inner ear magnetic resonanse
    Méniere’s disease
    Opis:
    Ménière’s disease (MD) is characterised by intermittent episodes of vertigo with fluctuating sensorineural hearing loss, tinnitus and aural fullness. Despite numerous studies, the etiology of this disorder remains poorly understood and thus diagnostic criteria are mainly clinical. Development and progress in magnetic resonance imaging (MRI) techniques, in 2007, has enabled visualisation of endolymphatic hydrops, which was the milestone achievement. We present two cases of patients with clinically confirmed MD with a set of audiological, otoneurological examinations and MRI performed. Structures of the inner ear were visualized using contrast-enhanced MR imaging after a 4-hour delayed intravenous gadolinium administration. The cochlea and vestibule were evaluated separately and classified using Barath grading scale. Endolymphatic hydrops in the clinically affected ears were confirmed using MRI. Due to disabling and intractable MD, a decision about vestibular neurectomy was made.
    Źródło:
    Polski Przegląd Otorynolaryngologiczny; 2019, 8, 3; 20-23
    2084-5308
    2300-7338
    Pojawia się w:
    Polski Przegląd Otorynolaryngologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Meniere Disease p. 1. Diagnosis criteria, signs and symptoms of Meniere Disease (MD) – comment to updated guidelines and own experiences
    Autorzy:
    Niemczyk, Kazimierz
    Pierchała, Katarzyna
    Bartoszewicz, Robert
    Jasińska, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/1399343.pdf
    Data publikacji:
    2019
    Wydawca:
    Index Copernicus International
    Tematy:
    hearing loss
    inner ear
    Meniere’s disease
    tinnitus
    tone audiometry
    vertigo
    Opis:
    We present an overview of current diagnostic and therapeutic guidelines on Ménière’s disease. Over the last five years, four studies on this subject have been published. In 2015, five Societies including the Classification Committee of the Barany Society, Japan Society for Equilibrium Research, EAONO - European Academy of Otology and Neurotology, AAO-HNS - American Academy of Otorhinolaryngology - Head Neck Surgery, and Korean Balance Society have issued updated guidelines on the diagnosis and treatment of Ménière’s disease. Other multi-center publications have since been published as well such as the International consensus (ICON) on treatment of Ménière’s disease 2018, European Position Statement on Diagnosis, and Treatment of Meniere’s Disease, Diagnostic and therapeutic strategy in Ménière’s disease, Guidelines of the French Otorhinolaryngology - Head and Neck Surgery Society (SFORL) 2017. The above-listed recommendations include the most recent diagnostic advancements (e.g. inner ear MRI) and new electrophysiological tests, but also discuss other commonly used treatment modalities, result reporting and they take into account the quality of life of the patients following treatment. We present the main clinical challenges in managing Ménière’s disease, principles of diagnosis as well as the treatment introduced at our center. Finally, we discuss fundamental updates contained in the published papers.
    Źródło:
    Polski Przegląd Otorynolaryngologiczny; 2019, 8, 2; 12-17
    2084-5308
    2300-7338
    Pojawia się w:
    Polski Przegląd Otorynolaryngologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inner ear malformations – overview, current classifications, challenges in management
    Autorzy:
    Haber, Karolina
    Konopka, Wiesław
    Amernik, Katarzyna
    Mierzwiński, Józef
    Powiązania:
    https://bibliotekanauki.pl/articles/1399247.pdf
    Data publikacji:
    2020
    Wydawca:
    Index Copernicus International
    Tematy:
    brainstem implant
    cochlear implant
    imaging tests
    inner ear malformations
    Opis:
    Introduction: Some patients with profound sensorineural hearing loss have inner ear malformations. Initially, those were believed to be a contradiction to cochlear implantation. However, with the advance of cochlear implant surgery and technology, it has become possible to treat this group of patients. However, cochlear implantation in the case of inner ear malformations can be associated with numerous surgical difficulties and possible complications. Purpose: The paper aims to present: (1) modern classification of inner ear malformations, (2) surgical and clinical challenges related to all types of malformations, and (3) cases of inner ear malformations identified in the authors’ centers. Material and methods: Of 111 children enrolled for cochlear implantation in three clinical centers, a group of patients with malformations of the inner ear was selected. We analyzed: preoperative imaging studies of patients performed prior to cochlear implantation, hearing tests, surgical protocols of cochlear implantation, results of intraoperative measurements and intraoperative imaging studies. We discuss what is currently believed to be the leading classification of inner ear malformations. Results: In 19/111 (17%) children, we diagnosed severe inner ear malformations in 35 ears. In 13/19 (68%) patients the malfor mations were bilateral and symmetrical, while 6/19 (32%) patients had different malformations in the right and left ear or one-sided malformation. All inner ear malformations described in the classification were found, except for rudimentary oto cyst. The most common are: cochlear hypoplasia, incomplete partition, and enlarged vestibular aqueduct. Discussion: Severe inner ear malformations are a major diagnostic and clinical challenge in children qualified for cochlear implantation. They can preclude or considerably complicate cochlear implantation and postoperative care. Inner ear malformations are found in imaging studies even in 20 to 30% of patients with profound hearing loss.
    Źródło:
    Polski Przegląd Otorynolaryngologiczny; 2020, 9, 3; 1-11
    2084-5308
    2300-7338
    Pojawia się w:
    Polski Przegląd Otorynolaryngologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of preoperative imaging for auditory implants in children
    Autorzy:
    Haber, Karolina
    Burzyńska-Makuch, Małgorzata
    Mierzwiński, Józef
    Powiązania:
    https://bibliotekanauki.pl/articles/1397250.pdf
    Data publikacji:
    2021
    Wydawca:
    Index Copernicus International
    Tematy:
    auditory brainstem implant
    cochlear implant
    cochlear ossification
    imaging studies
    inner ear malformations
    Opis:
    Introduction: Preoperative imaging, besides audiological evaluation, plays a major role in evaluation of candidacy for auditory implants, and in particular cochlear implants. It is essential to assess whether the basic criteria necessary for implantation are met. Diagnostic imaging is crucial not only in determining candidacy, but also determining the feasibility of cochlear implantation as it allow to anticipate surgical difficulties which could preclude or complicate the implantation of the device. The aim of the study is to present the protocol for the evaluation of preoperative imaging studies with particular focus on the factors potentially affecting clinical decisions in children qualified for cochlear implantation. Material and method: Preoperative imaging studies of 111 children performed prior to cochlear implantation were analyzed: high-resolution computed tomography (HRCT) of temporal bones and MRI. The assessment was made according to the presented protocol. Results: Pathologies and anomalies identified during the assessment of preoperative imaging studies significantly altered clinical decisions in 30% of patients. In the study group, in 17% of patients inner ear malformations were identified. 2.7% of children were disqualified from a cochlear implantation due to severe congenital inner ear malformations. 9% of the patients have had bacterial meningitis. In 50% of them difficulties related to complete or progressive cochlear ossification occurred. In 4.5% of patients less common surgical approaches other than mastoidectomy with a posterior tympanotomy were applied. Discussion: Preoperative imaging allow for the identification of significant pathologies and anomalies affecting qualification decisions and further treatment. HRCT and MRI are complementary to each other for preoperative imaging. The two modalities in combination allow accurate and optimal evaluation of the anatomical structures prior to implantation. Inner ear malformations and cochlear ossification following meningitis are relatively frequently encountered in children qualified for a cochlear implant.
    Źródło:
    Polish Journal of Otolaryngology; 2021, 75, 1; 23-35
    0030-6657
    2300-8423
    Pojawia się w:
    Polish Journal of Otolaryngology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cochlear Implantation in Children with Congenital Inner Ear Malformations
    Autorzy:
    Abbas, Azzam Muhsin
    Hamed, Mustafa Salman
    Ahmed, Ahmed Salah
    Powiązania:
    https://bibliotekanauki.pl/articles/27317603.pdf
    Data publikacji:
    2022-12-15
    Wydawca:
    Index Copernicus International
    Tematy:
    cochlear implantation
    congenital inner ear malformation
    facial nerve anomalies
    Opis:
    Introduction: Cochlear Implantation has proven beneficial in patients with profound congenital hearing impairments. Performing cochlear implantation in patients with inner ear malformation has always been a matter of dispute as congenitally deaf ears may have anatomical malformations and thus meet difficulties during operation. Therefore, it is important to focus on problems and complications encountered by surgeons performing such operations. Aim: To evaluate problems and surgical difficulties encountered in patients with congenital inner ear malformation, who underwent cochlear implantation. Material and methods: A series of 21 pediatric cochlear implant (CI) patients with known inner ear malformations determined on computed tomography (CT) of the temporal bone who underwent cochlear implantation in the Department of Otolaryngology of Martyr Ghazi Al-Hariri and AL-Yarmouk Teaching Hospital, Baghdad, Iraq, from January 2018 to January 2021. The study aimed to determine intraoperative adverse effects of these anomalies regarding electrode array insertion depths, predisposition to cerebrospinal fluid (CSF) leak through the cochleostomy, and associated facial nerve anomalies that can create problems with access to scala tympani. Results: The most common inner ear anomalies were wide vestibular aqueduct (15 patients, which makes 71.4%), incomplete partitions (5 patients, 23.8%), and common cavity (1 patient, 4.8%). As concerns CSF leak, the most common was CSF ooze (11 patients, 52.4%), CSF gusher (6 patients, 28.6%), and no CSF leak (4 patients, 19%). Among facial nerve anomalies there was only one case (4.8%) of abnormal position (more superficial and not injured) and 20 cases (95.2%) in which no anomaly was detected. As concerns electrode insertion depth, full insertion was achieved in 17 patients (81%), while incomplete insertion in 4 patients (19%). Conclusion: Cochlear implant can be successfully and safely inserted in patients with selected congenital inner ear anomalies. Surgery can be challenging in certain cases of gusher and facial nerve abnormalities, but proper radiology and good surgical technique will help avoid complications.
    Źródło:
    Polski Przegląd Otorynolaryngologiczny; 2022, 11, 4; 1-12
    2084-5308
    2300-7338
    Pojawia się w:
    Polski Przegląd Otorynolaryngologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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