抄録
Delayed cases of CO poisoning which happened in the coal mine were examined. All of the 14 patients showed neither severe disturbance of hearing nor equilibruim, although spontaneous nystagmus in 7 and positional nystagmus in 3 cases were found. Calorigrams were made in all of the patients and were classified as follows: DP in 7, DP+CP in 3, CP in 1 and Normal in 2. One patient had congenital nystagmus and could not be classified to any group. Attention was paid to the dysrhythmia of nystagmus patterns which appeared in 8 cases during caloric testing.
Diffuse brain lesions were suspected from neurological and electroencephalographical findings and it is considered that they were probably the causes of vestibular findings, such as spontaneous and positional nystagmus, DP and dysrhythmia.
