ECAPs are the summary of multiple neurons’ spikes which could be recorded by a bidirectional stimulation-recording system via the cochlear implant, with the artifact elimination paradigms of forward-masking subtraction paradigm or alternating polarity paradigm. Three kinds of FDA approved cochlear implants support ECAP testing. This article is to summarize the clinical application of ECAP test. ECAP test after insertion of electrode during implant operation has been widely used during cochlear implant surgery. In recent years, ECAP thresholds are also used to estimate the T levels and C levels helping programming. However, correlation between ECAP thresholds and psychophysical thresholds is affected by many factors. So far, ECAPs cannot yet be a good indicator of post-operative hearing and speech performance.

鼓膜切开置管术在儿童分泌性中耳炎听力康复中的应用

AIM: To study the role of the myringotomy and ventilation tube insertion inthe hearing rehabilitation of the children with secretory otitis media(SOM).METHODS: Myringotomy and ventilation tube insertions were performed in56 children with chronic SOM. RESULTS: The pure-tone threshold average(PTA) of six months after operation in 50 cases(91 ears) was improvedsignificantly compared with the preoperative PTA( P ＜ 0. 01 ). The effectiverate of myringotomy and ventilation tube insertion was 92. 3%. CONCLU-SION: As a therapeutic method in the hearing rehabilitation of the childrenwith chronic SOM, the myringotomy and veptilation tube insertion should beused as primary surgical therapy.

Objective:To evaluate the success of hearing results in total middle ear reconstruction with cartilage ossiculoplasty for the patients with old open- mastoidectomy cavities. Method: A retrospective review of 69 patients who underwent total middle ear reconstruction with cartilage ossiculoplasty was performed. Results: In this series, the successful hearing results were obtained in 61 % of the patients after operation, but 93% of the ears were dry. For patients with stapes, the successful rate was 65%; for patients without stapes,it was 58 %. The mean hearing gain was 10.7dB. Conclusion: Total middle ear reconstruction offers an effective treatment algorithia of hearing reconstruction for patients with old mastoidectomy cavities. 1. Stapes is important for hearing improvement; 2. Staged operation is good for hearing restoration; 3. For a large number of patients with a problematic cavitites, hearing restoration is possible by total middle ear reconstruction.

大鼠听力发育的研究（英）

The development of hearing varies in different ani-mals. Hearing depends on the development of a normal anatomic transformer (middle ear) and transducer (innerear), a central nervous system and its auditory afferentand efferent connections.Eighty Kunming strain mice were used in the study.These mice were equally divided into 8 groups accordingto their ages. The day numbers of age of each group wereP9 (the 9th postnatal day, P9), Pl0, P13, P14, P20,P40 and P70 (adult mice), respectively. Eight nerve ac-tion potential (AP) thresholds induced by click were ob-tained.