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  • 1975-1979  (3)
  • Guinea pig  (2)
  • Counter-immunoelectrophoresis  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 220 (1978), S. 299-301 
    ISSN: 1434-4726
    Keywords: Fluorocarbon ; O2-Solubility ; Perfusion ; Cochlea ; Guinea pig
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Because oxygen is at least ten times as soluble in fluorocarbon liquids as in plasma or saline, we investigated the principle possibility of perilymphatic perfusion of the cochlea with perfluortributylamin. Our experiments show that fluorocarbons in spite of the excellent O2-solubility in it are not suitable for the perilymphatic perfusion due to their physical properties (density 1.91 g/ml, non-solubility in water, necessity and difficulties of emulsification).
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 224 (1979), S. 257-265 
    ISSN: 1434-4726
    Keywords: Guinea pig ; Cochlear aqueduct ; Round window membrane ; Cerebrospinal fluid ; Perilymph ; Protein concentration ; Electrophysiology ; Histology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To prevent the perilymph (guinea pig) from contamination with CSF during the sampling the aqueductus cochleae (AC) was blocked by injection of tissue adhesive into the meningeal aperture. The control of an exact blockage of AC was carried out by examination of perilymph-outflow after opening the cochlea (injection of fluorescein-Na into the CSF-space), analysis of perilymphprotein-concentration, macroscopic and microscopic examination of the temporal bones. In all cochleae we have found the same morphological structures, notwith-standing whether the AC was blocked (for a time from 30 min to 7 weeks) or not: The cochlear aqueduct is filled with a mesh of mesenchymal tissue, which grows more dense towards the cochlear aperture and continues into the round window membrane. From scala tympani the AC is always limited by one layer of cells forming a sort of membrane (under light microscope). It seems possible that CSF moves in the inner of the round window membrane between AC and subepithelian space of middle ear mucosa, whereas perilymph of scala tympani is not in direct contact with the flow of CSF. The scala tympanic side of the round window membrane may be a big area for diffusion and there also may be an exchange between CSF and perilymph. The outflow of CSF into the cochlea after experimental opening of the cochlea is an artifact, caused by damage of pressure equilibration between CSF-space and cochlea. 30 min and 5–7 weeks after blockage no morphological and electrophysiological alterations from those of the control ears were to be seen. The protein concentration, however, increased significantly 5–7 weeks after blockage from normally about 200 mg/100 ml to almost the double especially in the scala tympani (see Table 1).
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    International archives of occupational and environmental health 42 (1978), S. 119-127 
    ISSN: 1432-1246
    Keywords: Organic dusts ; Allergic alveolitis ; Bird fancier's lung ; Immunology ; Counter-immunoelectrophoresis ; Sensitisation ; Pulmonary function diagnosis ; Ventilation ; Respiratory mechanics ; Diffusion ; Distribution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Studies to detect disorders of pulmonary function were performed on 42 workers at a poultry farm. All the subjects were exposed to organic dusts and sensitised to poultry antigens. Typical signs of bird fancier's lung were recorded in two of them. Included in all examinations were immunological diagnosis by means of counter-immunoelectrophoresis, systematic interviewing for case histories, and registration of respiratory symptoms. Pulmonary function was recorded by means of the following techniques: analysis of ventilation (flow-volume indices), respiratory mechanics of the larger airways and lung (body box plethysmography, oesophago-balloon technique), respiratory mechanics of the small airways (closing volume), distributional analysis, diffusion analysis, and blood gas analysis. A disorder of pulmonary function was recordable in 40 sensitised individuals. Such disorder being characterised by obstruction of the larger airways and slight inhomogeneity. The small airways were not narrowed. No restriction nor disturbed diffusion were established. The severity of obstruction was found to be related to the degree of sensitisation. The following more clearly pronounced changes in terms of functional diagnosis were recordable from two poultry workers with allergic alveolitis: obstruction of larger airways with concomitant restriction, marked inhomogeneity, and disorder of diffusion. The disorders, relatively discrete, led to mild PO2-reduction in sensitised individuals, whereas mild hypoxaemia was recorded from subjects with allergic alveolitis.
    Type of Medium: Electronic Resource
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