小脳橋角部腫瘍における聴性脳幹反応の検討

概要

論文の詳細を見る
The auditory brainstem response (ABR) was evaluated in 19 patients with cere-bello-pontine angle tumor (CPAT) and the following results were obtained.All patients exhibited positive test results. The response patterns were divided into three types; namely 1) the prolongation of I-V internal compared to the normal mean (two cases); 2) the presence of wave I but the disappearance of the following (thirteen cases); 3) no response at the maximum stimulation with 115dB (four cases). The simultaneous recording in the Love-Vertex and Membrane-Vertex made the detectability of wave I and V increased and is believed to be an extremely useful method for the detection of cochlear nerve disorders. The results in the unaffected side as well as the other neurotological examinations are also important in evaluating the size of the tumor.