PubMed · 5679727
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J C Ringenberg. A new middle ear ventilation device.. https://pubmed.ncbi.nlm.nih.gov/5679727/
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We studied on 70 cases of middle ear anomalies by a standard correspondence analysis method. The external meatus of these cases was open. We classified these 70 cases into the following four groups: type D: disruption between the long process of the incus and the movable oval window (54.3%), type F: immovable oval window with no disruption between the long process of the incus and the oval window (14.3%), type DF: anomalies with both immovable oval window and disruption between the long process of the incus and the oval window (18.6%), type O: anomalies of neither type D nor type F (12.9%). Half of these 70 cases had other miscellaneous anomalies, however, they did not affect the present results.
Severe cases of Ménière's disease are successfully treated with ototoxic antibiotics. Gentamycin sulphate gives the best results. With the aid of a small syringe the drug is introduced into the external auditory canal 3-5 times per day. From there it is transported into the middle ear through a ventilating tube (Grommet) under slight pressure (Politzer bag). The liquid then penetrates the round and oval windows and influences inner-ear function. More than 90% of our patients in 25 years after therapy had no further attacks.