Wolfe Jace, Kasulis Heather
Hearts for Hearing Foundation, Oklahoma City, OK 73112, USA.
Cochlear Implants Int. 2008 Jun;9(2):70-81. doi: 10.1179/cim.2008.9.2.70.
The purpose of this study was to describe speech recognition performance for subjects using electrically evoked stapedial reflex thresholds (eSRT) based on programs with the HiResolution Bionic Ear system. A secondary goal was to evaluate the relationship of the electrically evoked compound action potentials (eCAP) as measured with neural response imaging (NRI) relative to the subjects' most comfortable stimulation levels (M levels). M levels, eSRT and eCAP thresholds were measured in 19 postlinguistically deafened adults using either a CII or HiRes 90K cochlear implant. The results showed that eSRTs could be measured easily in a majority of subjects, whereas eCAPS were measured in all subjects. There were close agreements between eSRTs and M levels in the subjects' behaviorally based programs. In contrast, the correspondence between M levels and eCAP thresholds was not as strong. New programs were created with M levels based on the eSRTs for 11 subjects. Programs created using eSRTs as a guide for setting levels yielded better speech recognition than programs using conventional behavioural measures of M levels. These data indicate that individuals can obtain strong benefits from cochlear implants using programs with stimulation levels based on objective measures.
本研究的目的是描述使用基于高分辨率仿生耳系统程序的电诱发镫骨肌反射阈值（eSRT）的受试者的言语识别表现。第二个目标是评估通过神经反应成像（NRI）测量的电诱发复合动作电位（eCAP）相对于受试者最舒适刺激水平（M水平）的关系。使用CII或HiRes 90K人工耳蜗对19名语后聋成年人测量M水平、eSRT和eCAP阈值。结果表明，大多数受试者能够轻松测量eSRT，而所有受试者均可测量eCAP。在基于受试者行为的程序中，eSRT与M水平之间存在密切一致性。相比之下，M水平与eCAP阈值之间的对应关系不那么强。为11名受试者创建了基于eSRT的M水平的新程序。使用eSRT作为设置水平的指导创建的程序比使用传统M水平行为测量方法的程序产生了更好的言语识别效果。这些数据表明，个体使用基于客观测量的刺激水平程序的人工耳蜗可获得显著益处。
