Grewal Amandeep S, Kuthubutheen Jafri, Smilsky Kari, Nedzelski Julian M, Chen Joseph M, Friesen Lendra, Lin Vincent Y W
Department of Otolaryngology-Head and Neck Surgery, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada; Sunnybrook Cochlear Implant Program, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.
Laryngoscope. 2015 Jan;125(1):197-202. doi: 10.1002/lary.24873. Epub 2014 Sep 16.
OBJECTIVES/HYPOTHESIS: To investigate whether a contralateral routing of signal (CROS) microphone combined with a unilateral cochlear implant (CI) results in hearing improvement after a prolonged trial period.
A prospective experimental trial was undertaken on a group of 10 postlingually deafened adults who are experienced CI users.
Participants completed audiometric testing and validated questionnaires with their unilateral CI alone, followed by addition of a CROS microphone (CI-CROS). This was worn daily for the 2-week trial, after which hearing performance was reevaluated using the same measures. Objective tests included AzBio sentences in quiet and noise and consonant-vowel nucleus-consonant (CNC) words. Subjective measures included the Abbreviated Profile of Hearing Aid Benefit (APHAB); Speech, Spatial, Qualities of Hearing Index (SSQ); Hearing Implant Sound Quality Index; an institutional questionnaire; and a daily log sheet.
There is statistically significant enhanced speech discrimination with the CI-CROS when speech is presented on the CROS side. However, scores are markedly diminished when background noise is introduced, particularly to the CROS side. Subjective results indicate lower satisfaction scores for the global and ease of communication subdomains of the APHAB with the CI-CROS, but increased scores on the spatial hearing subdomain of the SSQ (P < 0.05).
The CI-CROS provides significant benefit in certain situations, particularly speech recognition in quiet. CI-CROS performance with background noise is poor, leading to low satisfaction scores. Further refinement of the device may yield a useful tool for unilateral CI users in the future.
目的/假设：探讨对侧信号路由（CROS）麦克风与单侧人工耳蜗（CI）联合使用在较长试验期后是否能改善听力。
对一组10名语后聋的成年人工耳蜗使用者进行了一项前瞻性实验性试验。
参与者先仅使用单侧人工耳蜗完成听力测试并填写经过验证的问卷，随后添加CROS麦克风（CI-CROS）。在为期2周的试验中，参与者每天佩戴该装置，之后使用相同的测量方法重新评估听力表现。客观测试包括安静和噪声环境下的AzBio句子以及辅音-元音-辅音（CNC）单词。主观测量包括助听器受益简表（APHAB）、言语、空间、听力质量指数（SSQ）、人工耳蜗声音质量指数、一份机构问卷以及一份每日日志表。
当声音在CROS一侧呈现时，CI-CROS在言语辨别方面有统计学显著提高。然而，当引入背景噪声时，得分显著降低，尤其是在CROS一侧。主观结果表明，在APHAB的整体和交流便利性子领域中，CI-CROS的满意度得分较低，但在SSQ的空间听力子领域得分有所提高（P < 0.05）。
CI-CROS在某些情况下能带来显著益处，特别是在安静环境下的言语识别。CI-CROS在背景噪声环境下的表现较差，导致满意度得分较低。该装置的进一步改进可能会在未来为单侧人工耳蜗使用者提供一个有用的工具。
