Fowler Cynthia G, Bauch Christopher D, Olsen Wayne O
Department of Communicative Disorders, University of Wisconsin-Madison, 53706, USA.
J Am Acad Audiol. 2002 Feb;13(2):72-82.
The purpose of this study was to determine whether clicks presented in rarefaction or condensation modes produce more accurate diagnostic information. Subjects were 20 consecutive patients who were seen at the Mayo Clinic for unilateral acoustic neuromas. The nontumor ear served as a control to minimize intersubject variability in the latencies. A standard audiologic evaluation was followed by an auditory brainstem response (ABR) test for which the stimuli were rarefaction and condensation clicks. Responses were analyzed for the presence of waves I, III, and V; absolute latencies of waves I, III, and V; interpeak intervals I-III, III-V, and I-V; and interaural latency difference for wave V. The results indicated that measures from both polarities were similar in this set of patients and that neither click polarity provided diagnostic advantages over the other. Recommendations are to collect ABRs to both click polarities individually to obtain the full complement of waves on which to base the diagnostic impression.
本研究的目的是确定以稀疏或密集模式呈现的咔嗒声是否能产生更准确的诊断信息。研究对象为20例连续在梅奥诊所就诊的单侧听神经瘤患者。以未患肿瘤的耳朵作为对照，以尽量减少受试者间潜伏期的变异性。在进行标准听力学评估后，进行听觉脑干反应（ABR）测试，刺激为稀疏和密集咔嗒声。分析反应中是否存在波I、III和V；波I、III和V的绝对潜伏期；峰间间期I-III、III-V和I-V；以及波V的耳间潜伏期差异。结果表明，在这组患者中，两种极性的测量结果相似，且两种咔嗒声极性在诊断上均无优势。建议分别收集两种咔嗒声极性的ABR，以获得用于形成诊断印象的完整波群。
