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  • Otitis media with effusion  (3)
  • Computer reconstruction  (1)
  • Fluctuating hearing  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Direct measurement of middle ear pressure through the eustachian tube (1987)
    Springer
    European archives of oto-rhino-laryngology and head & neck 243 (1987), S. 378-381 
    Details
    ISSN: 1434-4726
    Keywords: Middle ear pressure ; Otitis media with effusion ; Eustachian tube
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We report a method for measuring middle ear pressure through the eustachian tube. We used a 1-mm-diameter micro-tip catheter pressure transducer (Mikro-tip) and inserted this into the tympanic cavity through the eustachian tube. In preliminary studies, we measured four normal ears, two ears with tubal dysfunction, one ear with a dry perforation and 13 ears with otitis media with effusion (OME). Among those ears with OME, three showed negative middle ear pressure, three slight positive pressure and one normal pressure. These findings suggest that our transtubal method is reliable and useful for measuring middle ear pressure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00464646
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Magnetic resonance imaging of patients with large vestibular aqueducts (1996)
    Springer
    European archives of oto-rhino-laryngology and head & neck 253 (1996), S. 425-428 
    Details
    ISSN: 1434-4726
    Keywords: Endolymphatic sac ; Fluctuating hearing ; Large vestibular aqueducts ; Magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The vestibular aqueduct (VA) and endolymphatic sac (ES) were examined by magnetic resonance imaging in eight patients (14 ears) with large VAs, and the results were compared with those obtained in five normal volunteers (10 ears). It was not possible to identify either the VA or ES in any of the control ears. However, in all the 14 ears with a large VA, the VA was detected as a fluid-filled structure. In 12 ears the ES was seen to be markedly enlarged and also filled with fluid. In one ear, the volume of the fluid-filled space within the VA and ES was measured as 912 mm3 on serial images. Five patients (ten ears) were observed to have a fluid-filled VA and enlarged ES without cochlear anomalies and reported frequent episodes of sudden hearing loss and vertigo following exercise, long exposure to sunshine, minor trauma and the like. Two other patients (three ears) also had enlarged VA and ES as well as cochlear anomalies, but did not have episodes of sudden hearing loss and vertigo. These findings suggest that direct transmission of intracranial pressure changes to the inner ear or subsequent movement of endolymph in patients with a large VA may adversely influence a seemingly normal cochlea and vestibule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00168496
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Orientation for cochlear implant surgery in cases with round window obstruction: a computer reconstruction study (1995)
    Springer
    European archives of oto-rhino-laryngology and head & neck 252 (1995), S. 102-105 
    Details
    ISSN: 1434-4726
    Keywords: Cochlear implant ; Computer reconstruction ; Round window obstruction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In order to improve cochlear implant surgery in patients with obstructed round windows, surgical orientations of the round window and scala tympani relative to the stapes footplate were examined in ten normal temporal bones using a computer-aided, three-dimensional reconstruction and measurement technique. The round window was found to be exactly inferior to the midpoint of the inferior margin of the stapes footplate in most cases. An optimal point on the promontory wall for drilling to reach the bottom of the scala tympani of the basal turn was found to lie approximately 1.5 mm anterolateral or anterolateral inferior to a point 3 mm inferior to the midpoint of the inferior margin of the stapes footplate. A combination of the transmeatal and facial recess approaches made it possible to consistently reach the scala tympani, and demonstrated that this approach was also applicable to patients with obstructed round windows.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00168029
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Endoscopic findings at the pharyngeal orifice of the eustachian tube in otitis media with effusion (1996)
    Springer
    European archives of oto-rhino-laryngology and head & neck 253 (1996), S. 42-44 
    Details
    ISSN: 1434-4726
    Keywords: Endoscopy ; Eustachian tube ; Otitis media with effusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Transnasal endoscopy of the pharyngeal orifice of the eustachian tube was performed on 155 ears with otitis media with effusion (77 ears of children, 78 ears of adults). In children, blockage of the orifice by mucopurulent nasal discharge was the most frequent finding (72.7%), followed by compression of the orifice by the adenoid tissue (52.0%), hypertrophy of the peritubal tonsil (16.9%), and edema around the orifice, especially at its posterior lip (10.4%). In adults, the most frequent abnormal finding was edema of the orifice (26.9%), followed by blockage of the orifice by mucopurulent nasal discharge (23.1 %), and atrophy of the orifice (10.3%). In 39.7% of cases findings were normal. Thus, main pathological findings associated with tubal dysfunction involved inflammation in the nasopharynx.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00176702
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Experimental conditions for the development of persistent otitis media with effusion (1990)
    Springer
    European archives of oto-rhino-laryngology and head & neck 247 (1990), S. 89-92 
    Details
    ISSN: 1434-4726
    Keywords: Otitis media with effusion ; Eustachian tube dysfunction ; Escherichia coli endotoxin ; Animal experiment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The purpose of this study was to investigate sufficient conditions for the development of long-lasting otitis media with effusion (OME) without any organic obstruction of the eustachian tube. Three experimental conditions were employed using 20 adult cats (27 ears). Only tubal ventilatory dysfunction with transection of the tensor veli palatini muscle and excision of the pterygoid hamulus resulted in a small incidence of OME (7.1%), which lasted for 5 weeks. Instillation of Escherichia coli endotoxin into the middle ears formed only a transient OME in 50% of the animals. Combination of these two procedures brought a high incidence of OME (85.7%), most of which lasted for more than 8 weeks. These studies showed that tubal ventilatory dysfunction alone was not a sufficient condition for the development of OME but was important for prolongation of the pathological state of OME. The production of inflammatory exudate was considered to be a trigger for the formation of OME.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00183174
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    Paper (German National Licenses)
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