Monini Simonetta, Musy Isotta, Filippi Chiara, Atturo Francesca, Barbara Maurizio
NESMOS Department, Otolaryngologic Unit, Medicine and Psychology, Sapienza , Rome , Italy.
Acta Otolaryngol. 2015 Apr;135(4):381-8. doi: 10.3109/00016489.2014.990057. Epub 2015 Feb 26.
Bone conduction implants (BCIs) have been shown to partially restore some of the functions lost when binaural hearing is missing, such as in subjects with single-sided deafness (SSD). The use of a single BCI needs to be recommended by a clinician based on thorough counselling with the SSD subject.
To perform an overview of the present capabilities of BCIs for SSD and to evaluate the reliability of the audiological evaluation for assessing speech recognition in noise and sound localization cues, which are major problems related to the loss of binaural hearing.
Nine subjects with SSD who received BCI implants underwent a preoperative audiological evaluation that included sound field speech audiometry, word recognition score (WRS) testing and sound localization testing in quiet and in noise. They were also tested for the accuracy of their directional word recognition in noise and their subjective perceptions of their hearing difficulties using the APHAB questionnaire.
The mean maximum accuracy of word discrimination was 65.5% in the unaided condition and 78.9% in the BCI-aided condition. Sound localization in noise was better with the BCI than in the unaided condition, especially when the stimulus and noise were presented on the same side as the implanted ear. The accuracy of directional word recognition showed an improvement with the BCI with respect to the unaided condition on the BCI side, with either the stimulus in the implanted ear and the noise in the contralateral ear or with both the stimulus and noise presented to the implanted ear.
骨传导植入物（BCIs）已被证明可部分恢复双耳听力丧失时所失去的一些功能，例如在单侧耳聋（SSD）患者中。临床医生需要在与SSD患者进行充分咨询后，才能推荐使用单个BCI。
概述BCIs目前对SSD的治疗能力，并评估听力评估在评估噪声中的语音识别和声音定位线索方面的可靠性，这些是与双耳听力丧失相关的主要问题。
9名接受BCI植入的SSD患者在术前进行了听力评估，包括声场言语测听、单词识别分数（WRS）测试以及在安静和噪声环境下的声音定位测试。他们还接受了噪声中定向单词识别准确性的测试，以及使用APHAB问卷对其听力困难主观感受的测试。
在未使用辅助设备的情况下，单词辨别平均最大准确率为65.5%，在使用BCI辅助的情况下为78.9%。在噪声环境中，使用BCI时的声音定位比未使用辅助设备时更好，尤其是当刺激声和噪声在植入耳同侧呈现时。在BCI一侧，与未使用辅助设备的情况相比，无论刺激声在植入耳而噪声在对侧耳，还是刺激声和噪声都呈现给植入耳，定向单词识别的准确性都有提高。
