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22例桥小脑角占位性病变的参数结果表明,BSR对听神经瘤诊断极为敏感,但其假阳性率占33％,若与CT结合可使误诊率下降至7％,使确诊率达93％。ENG视跟踪及Barany试验是听神经瘤诊断的简便易行、较为可取的方法。视跟踪Ⅲ型可被视为CPA听神经瘤诊断的重要参数。BSR、CT、ENG及内听道照像对听神经瘤最有诊断价值。若四者皆为阳性,听神经瘤的确诊率可大为提高。本文14例听神经瘤中四种检测都为阳性者7例,经病理证实皆为听神经瘤。BSR结合CT应作为临床的普遍检查手段。脑超声波、脑电对CPA占位性病变的鉴别无特异性。纯音测听不能鉴别原发性或继发性占位性失听。内听道异常改变不完全是听神经瘤所致。
The results of 22 patients with cerebellar angle occupying lesions showed that BSR was extremely sensitive to the diagnosis of acoustic neuroma, but the false positive rate was 33%. If combined with CT, the misdiagnosis rate could be reduced to 7% and the diagnosis rate to 93% . ENG visual tracking and Barany test is an easy and feasible method to diagnose acoustic neuroma. Visual tracking type III can be considered as an important parameter in the diagnosis of CPA acoustic neuroma. BSR, CT, ENG and auditory nerve imaging of the most diagnostic value. If the four are positive, the diagnosis of acoustic neuroma can be greatly improved. This article 14 cases of acoustic neuroma in four tests were positive in 7 cases, all confirmed by pathology acoustic neuroma. BSR combined with CT should be used as a universal clinical examination. Brain ultrasound, EEG non-specific identification of CPA lesions. Pure tone audiometry can not identify primary or secondary occupational hearing loss. Abnormal changes in the auditory canal is not completely caused by acoustic neuroma.