The impedance of the middle-ear air space was measured on three human cadaver ears with complete mastoid air-cell systems. Below 500 Hz, the impedance is approximately compliance-like, and at higher frequencies (500-6000 Hz) the impedance magnitude has several (five to nine) extrema. Mechanisms for these extrema are identified and described through circuit models of the middle-ear air space. Th...

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Otitis media is inflammation of the middle ear and tympanic membrane, which often occurs as a result an acute upper respiratory tract infection. Generally, it caused by viral infection that then complicated secondary bacterial However, initial may also be bacterial.Otitis very common in children there high rate spontaneous recovery. It has been suggested unavoidable illness childhood part natur...

BACKGROUND The diagnostic performance of endoscopic and microscopic procedures for detecting diseases of the middle ear in patients with chronic otitis media (COM) has rarely been investigated. This study was conducted to compare the performance of these procedures for identifying middle ear structures and their associated diseases in COM patients. METHODS In this prospective cohort study, 58...

Introduction: Chronic suppurative otitis media (CSOM) is defined as a chronic inflammation of the middle ear and mastoid cavity, which presents with recurrent ear discharges or otorrhoea through a tympanic perforation. The disease usually begins in childhood as a spontaneous tympanic perforation due to an acute infection of the middle ear known as Acute Otitis Media (AOM). The objective of this...

Berling Holm, K. 2017. The Chorda Tympani Nerve. Role in Taste Impairment in Middle Ear Disease and after Ear Surgery. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine 1306. 54 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-9837-5. The chorda tympani nerve, also known as the taste nerve, runs uncovered through the middle ear cavity, a localizat...

Introduction: Presence of vestibular schwannoma and a simultaneous glomus jugulare tumor is an extremely rare event. There is only one case report regarding the incidence of a contralateral vestibular schwannoma, along with a glomus jugulare tumor. Herein, we present the second case with a contralateral tumor.   Case Report: A 69-year-old woman presented with a long hist...

BACKGROUND Because previous studies have indicated that otitis media may be a polymicrobial disease, we prospectively analyzed middle ear effusions of children undergoing tympanostomy tube placement with multiplex polymerase chain reaction for four otopathogens. METHODS Middle ear effusions from 207 children undergoing routine tympanostomy tube placement were collected and were classified by ...

Middle ear infection, otitis media (OM), is clinically important due to the high incidence in children and its impact on the development of language and motor coordination. Previously, we have demonstrated that the human middle ear epithelial cells up-regulate β-defensin 2, a model innate immune molecule, in response to nontypeable Haemophilus influenzae (NTHi), the most common OM pathogen, via...