The Pre- And Postoperative Eng Findings In Clinical Otosclerosis And The Late Hearing Results

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Abstract
Patients (125) suffering from otosclerosis underwent oto-neurological investigations preoperatively and again daily from the 2nd-6th day postoperatively. An abnormal ENG [electronystagmogram] in the form of a spontaneous or positional nystagmus, directional preponderance or a diminished caloric reaction could be found preoperatively in 30% of the patients. No statistically significant different between patients with or without abnormal ENG findings could be shown in the late postoperative hearing results of 3 yr in a series of different types of operations. Nearly half of the patients had postoperative nystagmus. On the 2nd day nystagmus beat towards the operated ear in 22.3% of the patients. On the 6th day there was nystagmus only in 1/3 of the patients, and it then beat towards the operated ear in only 12.1% of the patients and away from the operated ear in 21.6%. No statistically significant correlation could be found between the nystagmus findings and the late hearing results after 3 yr observation in this series of different types of operations.

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