SINCE the advent of the Lempert fenestration operation1 for the restoration of practical and serviceable hearing in patients with clinical otosclerosis, the necessity for the development of an objective test by which to determine preoperatively the existing reservoir of cochlear function in a deafened ear has become quite obvious. However, not until the tympanosympathectomy technic2 for the relief of tinnitus aurium was first introduced did the development of such a test enter the realm of possibility. Since tinnitus is not infrequent in people with normal hearing and since the tympanosympathectomy technic permits the placing of specially devised electrodes against the round window membrane, it is hoped that a standardized normal electrical cochleogram can be developed so that any deviations from the normal can eventually be studied and recognized.
Drs. Wever, Lawrence and I are now engaged in an attempt to develop a practical and safe means for obtaining
LEMPERT J, WEVER EG, LAWRENCE M. THE COCHLEOGRAM AND ITS CLINICAL APPLICATION: A Preliminary Report. Arch Otolaryngol. 1947;45(1):61–67. doi:10.1001/archotol.1947.00690010068005
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