Weder Stefan, Kompis Martin, Caversaccio Marco, Stieger Christof
Department of ENT, Head and Neck Surgery, Inselspital, University of Bern, Bern, Switzerland.
Audiol Neurootol. 2015;20(2):73-80. doi: 10.1159/000363212. Epub 2014 Dec 9.
To investigate objective and subjective effects of an adjunctive contralateral routing of signal (CROS) device at the untreated ear in patients with a unilateral cochlear implant (CI).
Prospective study of 10 adult experienced unilateral CI users with bilateral severe-to-profound hearing loss. Speech in noise reception (SNR) and sound localization were measured with and without the additional CROS device. SNR was measured by applying speech signals at the untreated/CROS side while noise signals came from the front (S90N0). For S0N90, signal sources were switched. Sound localization was measured in a 12-loudspeaker full circle setup. To evaluate the subjective benefit, patients tried the device for 2 weeks at home, then filled out the abbreviated Speech, Spatial and Qualities of Hearing Scale as well as the Bern benefit in single-sided deafness questionnaires.
In the setting S90N0, all patients showed a highly significant SNR improvement when wearing the additional CROS device (mean 6.4 dB, p < 0.001). In the unfavorable setting S0N90, only a minor deterioration of speech understanding was noted (mean -0.66 dB, p = 0.54). Sound localization did not improve substantially with CROS. In the two questionnaires, 12 of 14 items showed an improvement in mean values, but none of them was statistically significant.
Patients with unilateral CI benefit from a contralateral CROS device, particularly in a noisy environment, when speech comes from the CROS ear side.
研究单侧人工耳蜗植入（CI）患者未治疗耳使用辅助对侧信号路由（CROS）装置的客观和主观效果。
对10名患有双侧重度至极重度听力损失的成年经验丰富的单侧CI使用者进行前瞻性研究。在佩戴和不佩戴额外CROS装置的情况下测量噪声中的言语接收（SNR）和声音定位。通过在未治疗/CROS侧施加言语信号而噪声信号来自前方（S90N0）来测量SNR。对于S0N90，信号源进行切换。在12个扬声器的全圆设置中测量声音定位。为了评估主观益处，患者在家中试用该装置2周，然后填写简化的言语、空间和听力质量量表以及单侧耳聋的伯尔尼益处问卷。
在S90N0设置中，所有患者佩戴额外的CROS装置时SNR均有高度显著改善（平均6.4 dB，p < 0.001）。在不利的S0N90设置中，仅注意到言语理解有轻微恶化（平均 -0.66 dB，p = 0.54）。使用CROS时声音定位没有实质性改善。在两份问卷中，14项中的12项平均值有所改善，但均无统计学意义。
单侧CI患者受益于对侧CROS装置，特别是在嘈杂环境中，当言语来自CROS耳侧时。
