Search results for "Middle Ear"
showing 10 items of 43 documents
Tissue reactions to glass ceramics in the middle ear
1981
The bioactive glass ceramic "Ceravital" was used to fashion prostheses for the replacement of various ossicles in the middle ear. They were tested in 70 rabbit ears, where they were accepted in osseous areas without formation of surrounding fibrous tissue. Histological examinations regularly showed an osseous bond with the surrounding bony tissue. Mucous membrane covered these ossicular chain prostheses and showed no evidence of inflammatory reactions. Glass ceramic implants were also used to reconstruct the ossicular chain and the posterior wall of the outer ear canal in 100 patients. The functional results were satisfactory in all cases.
Le fistole liquorali nella patologia otologica
2005
Cerebrospinal fluid fistulas in the otologic pathology show the presence of one or more anomalous touches between subaracnoids spaces and temporal bone. Cerebrospinal fluid fistulas are distinguished in congenital and acquired. The acquired fistulas are the most large group and they include post-traumatic fistulas, post-infective fistulas and/or post-inflammatory fistulas, iatrogenic fistulas, post-neoplastic fistulas and spontaneous fistulas. The congenital fistulas are more rare, they involve otic capsula and are, often, associated with malformations of inner ear. The critical analysis of our data leads, in our opinion, to some interesting diagnostic considerations. © Copyright 2005, CIC …
Die Vibrant Soundbridge®: Ein alternatives Hörsystem bei Vorschulkindern mit Gehörgangsatresie
2016
Hintergrund: Die Versorgung von Kindern mit Gehorgangsatresie stellt einen hohen Anspruch an Mediziner und Akustiker. Herkommliche Horsysteme werden oft nicht toleriert, womit sie die Forderung nach einer fruhzeitigen und effizienten Versorgung der Horstorung nicht erfullen. Ziel der vorliegenden Studie ist daher die Untersuchung der Versorgungsqualitat von Kindern vor dem 6. Lebensjahr mit dem Mittelohrimplantat VSB® bei uni- bzw. bilateraler Gehorgangsatresie. Material und Methoden: Bei 16 Kindern, 13 mit uni-, 3 mit bilateraler Gehorgangsatresie, implantiert mit einer Vibrant Soundbridge (VSB®) im Alter von durchschnittlich 2;11±1;6 Jahren, wurde 3 Monate nach Erstanpassung des Audioproz…
[Construction and reaction of the mucosa-associated-lymphatic tissue (MALT) in the middle ear, the Tuba Eustachii and the larynx of the rat].
2003
Otitis media with effusion in children: Cross-frequency correlation in pure tone audiometry.
2019
Different guidelines are adopted in clinics and countries to assess pure tone hearing sensitivity in children with otitis media with effusion (OME). Some guidelines specify a broad range of audiometric frequencies that must be tested and from which average thresholds determined, while others leave test frequencies unspecified. For guidelines that suggest specific frequencies there are various pure tone frequencies and frequency ranges given. The present study investigated whether (1) a full range of audiometric frequencies is required to evaluate hearing loss caused by OME in children, or if neighboring frequencies provide essentially the same threshold information, and (2) if different com…
High-frequency conductive hearing loss as a diagnostic test for incomplete ossicular discontinuity in non-cholesteatomatous chronic suppurative otiti…
2017
Chronic suppurative otitis media, with or without cholesteatoma, may lead to erosion of the ossicles and discontinuity of the ossicular chain. In incomplete ossicular discontinuity (IOD), partial erosion of the ossicles occurs, but some sound transmission is noted throughout the ossicular chain. High-frequency conductive hearing loss (HfCHL) has been considered a hallmark of incomplete ossicular discontinuity. This study aims to evaluate the use of HfCHL as a preoperative predictor of IOD in patients with non-cholesteatomatous chronic suppurative otitis media. The HfCHL test was defined as the preoperative air-bone gap (ABG) at 4 kHz minus the average of the ABG at 0.25 and 0.5 kHz. The tes…
Inverted papilloma of middle ear and temporal bone.
2016
Motoneurons of the stapedius muscle in the guinea pig middle ear: Afferent and efferent transmitters
2008
The objective of the present study was to identify efferent and afferent transmitters of motoneurons of the stapedius muscle of the middle ear in order to gain more insight into the neuronal regulation of the muscle. To identify motoneurons, we injected the fluorescent neuronal tracer Fluorogold (FG) into the muscle after preparation of the middle ear in adult guinea pigs. Upon terminal uptake and retrograde neuronal transport, we observed FG in neurons located medial and ventral to the nucleus of the facial nerve ipsilateral to the injection site. Immunohistochemical studies of these motoneurons showed that the majority contains calcitonin gene-related peptide. Our data further demonstrate…
Tone perception in Mandarin-speaking school age children with otitis media with effusion.
2017
Objectives The present study explored tone perception ability in school age Mandarin-speaking children with otitis media with effusion (OME) in noisy listening environments. The study investigated the interaction effects of noise, tone type, age, and hearing status on monaural tone perception, and assessed the application of a hierarchical clustering algorithm for profiling hearing impairment in children with OME. Methods Forty-one children with normal hearing and normal middle ear status and 84 children with OME with or without hearing loss participated in this study. The children with OME were further divided into two subgroups based on their severity and pattern of hearing loss using a h…
Cholesteatoma of the hypotympanum in a patient with Treacher Collins syndrome
2014
In the present article we report a cholesteatoma of the hypotympanum extending to the jugular foramen in a 16-year-old male with Treacher Collins syndrome. Preoperative imaging excluded jugular paraganglioma and set the diagnosis of cholesteatoma. We discuss the operative treatment via a large hypotympanotomy and creation of an open hypotympanic cavity. To the authors' knowledge this is the first description of hypotympanal cholesteatoma with such an extension, being treated through this approach.