Abstract
Recently we experienced 3 cases of vertigo and staggers caused by acoustic trauma in our clinic. The first case, a man of 41 years, sustained a gun's report near by his right ear. Without delay he felt staggers and tinnitus of the right ear, and continuously he suffered for a few monthes.
The second case, a man of 27 years, had been working under a great noise for several years. One day he had suddenly a rotational vertigo attack after suffering a roar so that he was made a diagnosis of Mèniére's disease.
The third case, a carpenter of 38 years, heard a explosion of “drive-it” and he felt obstruction of his left ear. One half year later he suffered from rotational vertigo and got Mèniére's disease.
Among the 400 cases of vertigo, consulted our clinic for the past 15 monthes, 31 patients had relations with sound and they were possibly due to acoustic trauma. In these 31 cases, many patients complained the unsteady-feeling rather than the rotational vertigo, and most of them denoted disequilibrium by the functional tests of the vestibular apparatus. The positional nystagmus was found on 12 cases and 11 cases of them belonged to Nylèn's 2nd type. The manifesting rate of spontaneous nystagmus (about 30%) was almost same as that of Mèniére's disease patients.
