Performance over time of adult patients using the Ineraid or nucleus cochlear implant.
Performance over time of adult patients using the Ineraid or nucleus cochlear implant.
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DOI：
10.1121/1.419724
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发表时间：
1997-07
期刊：
影响因子：
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通讯作者：
R. Tyler;A. Parkinson;G. Woodworth;M. Lowder;B. Gantz
中科院分区：
文献类型：
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作者：
R. Tyler;A. Parkinson;G. Woodworth;M. Lowder;B. Gantz
本研究考察了49名成年人工耳蜗受试者的平均和个人表现。受试者被随机分配接受内耳人工耳蜗（模拟处理）或耳蜗核（特征提取处理）。所有受试者都有语后重度双侧感音神经性听力损失，在植入助听器前没有明显的获益。分组数据以两种方式进行检验。首先，只有在测试期间拥有完整数据的受试者才会被检查。其次，通过混合线性模型分析对所有可用数据进行分析。在此分析中，为了解释在计划间隔内错过的后续测试，在计划的后续时间内，由最接近计划测试时间的观测数据组成的数据通过在计划的后续时间内具有结的自然样条曲线建模。测试了每种设备的所有对计划随访时间之间的对比，以及每个计划随访时间设备之间的对比。结果表明，在表现水平或学习速度方面，“内内”和“核”受试者的表现差别不大。植入后的表现通常在9个月内优于植入前的表现，并根据语音感知测量持续改善至18-30个月。在一些受试者中，语音感知测量的改善在植入后的四到五年内被观察到。也有证据表明，尽管植入后的得分总是高于植入前的得分，但三名受试者的整体言语感知表现有所下降。至少在一个研究对象中，这可能是与年龄相关的认知能力下降的结果。
This study examined the average and individual performance over time of 49 adult cochlear implant subjects. Subjects were randomly assigned to receive either the Ineraid cochlear implant, with analog processing, or the Nucleus cochlear implant, with feature-extraction processing. All subjects had postlingual profound bilateral sensorineural hearing loss and received no significant benefit from hearing aids before implantation. Group data were examined in two ways. First, only subjects who had complete data over the test period were examined. Second, an analysis of all available data was carried out by mixed linear-model analysis. In this analysis, to account for missed follow-ups at the planned intervals, data consisting of the observations closest in time to the planned test times were modeled by natural splines with knots at the planned follow-up times. Contrasts between all pairs of planned follow-up times for each device were tested, as were contrasts between devices at each planned follow-up time. Results indicated little difference between the performance of the Ineraid and Nucleus subjects in their level of performance or their rate of learning. Postimplantation performance was typically superior to preimplantation performance within 9 months, and continued to improve up to 18-30 months depending on the speech perception measure. In some subjects, improvements in speech perception measures were observed up to four or five years postimplantation. There was also evidence that three subjects had a decrement in overall speech perception performance, although their postimplantation scores were always higher than their preimplantation scores. In at least one subjects this was likely a result of age-related cognition decrements.