Abstract
The function of the internal ear after a stapedectomy is controlled by lateralization to the operated ear using the Weber's hearing test. A shift of lateralization to the other ear indicates a decrease in the bone conduction. A recruitment of the operated ear is proved by a retrograde lateralization when striking the tuning-fork strongly. The quantitative evaluation of the recruitment in the “calibrated Weber's hearing test” using an audiometer and placing the bone-conduction receiver on the forehead, gives evidence of the post-operative internal ear function. This quantitative evaluation is obtained by determining the exact sound level in shifting the lateralization. The results obtained from tests made on 50 stapedectomized patients showed a decrease in the hearing ability of the operated ear, reaching a maximum on the 4th to the 6th postoperative day. The degree and the duration of the recruitment, and therewith of the internal ear damage are indicative of the final bone conduction threshold.
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