Sheppard I J, Milford C A, Anslow P
Department of Otolaryngology, Radeliffe Infirmary, Oxford, UK.
Clin Otolaryngol Allied Sci. 1996 Aug;21(4):301-4. doi: 10.1111/j.1365-2273.1996.tb01074.x.
Magnetic resonance imaging (MRI) is the definitive investigation in the detection of an acoustic neuroma and its use is becoming increasingly widespread for this purpose. In the Oxford region, this facility has been available for 3 years, resulting in the scanning of the internal auditory meati and cerebellopontine angles of 892 patients and the detection of 38 acoustic neuromas. Based on our use of this investigation over this time period, we have attempted to rationalize our entry protocol for screening by limiting the availability of the test to those patients up to 70 years of age presenting with unilateral audiovestibular symptoms in the absence of significant neurological symptoms or signs, with an average difference in hearing threshold of 15 dB between normal and symptomatic ears or unilateral tinnitus with normal hearing. By following these entry criteria, we would hope to maximize the available resources.
磁共振成像（MRI）是检测听神经瘤的决定性检查方法，并且为此目的其应用正变得越来越广泛。在牛津地区，这项检查设备已经可用三年了，在此期间对892例患者的内听道和桥小脑角进行了扫描，检测出38例听神经瘤。基于我们在这段时间内对这项检查的应用，我们试图通过将检查的适用范围限制在70岁以下、出现单侧听觉前庭症状且无明显神经症状或体征、正常耳与患耳听力阈值平均相差15dB或单侧耳鸣且听力正常的患者，来合理制定我们的筛查准入方案。通过遵循这些准入标准，我们希望能最大限度地利用现有资源。
