Local pO2 measurements in the cochlear perilymph of guinea pigs in oxygen and oxygen/carbon dioxide breathing
Frühwald, H.; Köllner, W.; Prohaska, O.
Laryngologie Rhinologie Otologie 58(9): 731-736
1979
ISSN/ISBN: 0340-1588 PMID: 522593 Document Number: 147216
After breathing a mix of 10% CO2 and 90% O2 or hyperbaric O2 (2 bar absolute) an appreciable rise of pO2 can be demonstrated by D.C. polarography in the scala tympani of the guinea pig chochlea. When test animals are made to breathe 100% pure O2 at normal pressure the rise of pO2 is significantly less pronounced. The observations made in these animal experiments suggest that the inhalation of CO2O2 currently constitutes the only valid inhalation treatment in acute inner ear deafness. Further compression of hyperbaric O2 is associated with a clear-cut rise of pO2. It should, however, be remembered that hyperbaric oxygen may produce toxic effects in various body tissues.