Jeppsen Charlotte, McMurray Bob
Department of Psychological and Brain Sciences, University of Iowa, Iowa City, IA, USA.
Department of Communication Sciences and Disorders, University of Iowa, Iowa City, IA, USA.
J Assoc Res Otolaryngol. 2025 Jul 14. doi: 10.1007/s10162-025-01001-3.
The efficacy of the Cochlear Implant (CI) in listeners with single-sided deafness (SSD) was evaluated by comparing single-ear speech perception in SSD listeners and bilateral cochlear implant listeners (BCI).
Consonant-nucleus-consonant (CNC) speech perception scores for the CI-only ear in SSD listeners (N = 55; 36 female, 19 male) were compared to single-ear performance in age and device experience-matched BCI listeners (N = 55; 29 female, 26 male). Separate analyses examined: (1) a matched ear from the BCI listeners (for sequentially implanted BCI listeners, the first-implanted ear in sequential BCI listeners, or, for simultaneously implanted BCI listeners, the ear on the same side as the CI in the matching SSD listener), and (2) the lower-performing ear across BCI listeners. Additional models included moderators such as age, time since activation, CI usage, and etiology. A final analysis compared first and second implants for sequential BCI listeners.
SSD listeners showed significantly lower CNC performance after controlling for age, time since activation, CI usage, and etiology. Sequential BCI listeners exhibited significantly lower CNC performance on their second ear, compared to their first ear.
Speech perception with CIs is reduced in SSD listeners compared to BCI users, likely due to blocking, where the normal-hearing ear diminishes reliance on the CI. Lower performance in the second implanted ear of sequential BCI listeners also suggests greater reliance on the more experienced ear. These findings highlight the need for additional training, resources, and support to optimize CI performance in SSD listeners, despite prior evidence of positive CNC outcomes.
通过比较单侧耳聋（SSD）患者单耳言语感知与双侧人工耳蜗植入患者（BCI）的情况，评估人工耳蜗（CI）对单侧耳聋患者的疗效。
将SSD患者（N = 55；36名女性，19名男性）仅使用CI的耳朵的辅音-元音-辅音（CNC）言语感知得分，与年龄和设备使用经验匹配的BCI患者（N = 55；29名女性，26名男性）的单耳表现进行比较。分别进行的分析包括：（1）BCI患者中匹配的耳朵（对于顺序植入的BCI患者，是顺序植入BCI患者中先植入的耳朵；或者，对于同时植入的BCI患者，是匹配的SSD患者中与CI同侧的耳朵），以及（2）BCI患者中表现较差的耳朵。其他模型纳入了年龄、激活后时间、CI使用情况和病因等调节因素。最后一项分析比较了顺序植入的BCI患者的第一枚和第二枚植入体。
在控制年龄、激活后时间、CI使用情况和病因后，SSD患者的CNC表现显著更低。顺序植入的BCI患者的第二只耳朵的CNC表现，与第一只耳朵相比显著更低。
与BCI使用者相比，SSD患者使用CI时的言语感知能力下降，可能是由于掩蔽效应，即正常听力的耳朵减少了对CI的依赖。顺序植入的BCI患者第二只植入耳朵的表现较差，也表明对经验更丰富的耳朵依赖更大。这些发现凸显了尽管之前有CNC结果呈阳性的证据，但仍需要额外的训练、资源和支持，以优化SSD患者的CI性能。
