Imaging and audiology analysis of the congenital inner ear malformations / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To investigate imaging and audiology features of temporal bone and analyze the classification and prevalence of inner ear abnormalities in children with sensorineural hearing loss.@*METHOD@#Children who were diagnosed with sensorineural hearing loss were examined by high resolution CT and the inner ear fluid of MRI. And each chart was retrospectively reviewed to determine the imaging and audiology features.@*RESULT@#There were 125 patients(232 ears) found with inner ear malformation in 590 children with SNHL. About 21.71% of the inner ear malformation occurred in severe and profound hearing loss ears, and 12.85% occurred in r moderate hearing loss ears. The inner ear malformation rate in normal hearing ears were 13.59%.@*CONCLUSION@#CT and MRI examinations of temporal bone are important diagnostic tools to indentify inner ear malformations. Inner ear malformations are almost bilateral and hearing loss are profoud. Cochleo-vestibular malformations and large vestibular aqueduct are the 2 most frequent deformities. Among the children with SNHL, deformity rate in the severe and profound hearing loss ears is higher than that in moderate hearing loss ear. Inner ear malformations can exist in people with normal hearing.

The relevance of high stimulus rate ABR and recurrent vertigo and its clinical significance / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To study the relevance of the high stimulus rate auditory brainstem response(auditory brainstem response, ABR) test in recurrent vertigo, investigate the cause of recurrent vertigo, and provide important help for the clinical treatment.@*METHOD@#One hundred and one cases with recurrent vertigo were retrospectively analyzed, and high stimulus rate ABR were tested and compared in attack episodes and intermittent episodes.@*RESULT@#The abnormal difference between ABR I and V latency was selected as parameters. The abnormal rate of high stimulation ABR was 56.4% in patients with recurrent episodes of vertigo many times (2 and above), of which the highest rate was 71.9% in MV patients, and the second one was BPPV. The abnormal rate of high stimulation ABR was 14.9% in patients during medication or intermittent episodes. The abnormal rate in all groups decreased obviously as compared to attack episodes.@*CONCLUSION@#Abnormal rate of high stimulus rate ABR correlates well with recurrent vertigo significantly. The inner ear microcirculation may result in the attack of recurrent vertigo.

Diagnosis and Treatment of Delayed Endolymphatic Hydrops / 听力学及言语疾病杂志

Objective To investigate the diagnosis and treatments of delayed endolymphatic hydrops(DEH).Methods A restrospective study was conducted in 37 cases of DEH.who were tested with pure tone threshold,vestibular evoked myogenic potentials,high stimulation rate auditory brainstem response audiometry and vestibular ruction test.Conservative drug therapy was the major treatment.Results All the 37 patients had sensorineural hearing loss up to the medium-severe degrees at least.Twenty-five had hearing loss and endolymphatic hydrops on the same side,nine had contralateral type and three bilateral type.Ten cases had abnormal horizontal semicircular canal(HSCC) hydrops and saccular hydrops.Nine cases had abnormal HSCC function and nomal saccular function.Fifteen cases had abnormal saccular function and normal HSCC function.Twenty-five abnomalVEMP showed of loss of p13-n23,prolonged latencies of p13 and depressed amplitude cases with of p13-n23.18 cases were completely relieved from vertigo in a week.17 cases improved until totally relieved in two weeks,while the rest 2 cases that were subject to chemistry labyrinthectomy free of vertigo attack.Conclusion Pure tone threshold,EcochG,bithermal caloric test and vestibular evoked myogenic potentials are important diagnosis methods of delayed endolymphatic hydrops.Consevative drug therapy,especially diuretics and vascular dilation may play a major role in the treatment of delayed endolymphatic hydrops.

Performance-intensity function of mandarin monosyllable and sentence materials for normal-hearing subjects / 临床耳鼻咽喉头颈外科杂志

OBJECTIVE@#To analyze the monosyllabic and sentence lists of Mandarin speech test materials (MSTMs) which have been evaluated the equivalence of difficulty, and to establish the performance-intensity function (P-I function) for people with normal hearing.@*METHOD@#Forty subjects (the age-ranged from 18 to 25 years old) who speak Mandarin well in their daily lives with normal hearing participated in this study. Eight of them joined the pilot study, which aimed to identify an appropriate presentation level for the formal test. Thirty-two subjects participated in the formal speech perception test. The results were analyzed by Statistical Package for the Social Sciences (SPSS) software version 11.0. Seven monosyllabic lists (50 words per list) and 15 sentence lists (50 key words per list) were used.@*RESULT@#The results showed P-I function of 3.1% per dB for monosyllabic Mandarin materials and 7.4% per dB for sentence Mandarin materials. The sound pressure level of speech corresponding to a 50% recognition score for monosyllabic lists was 30.1 dBSPL or 10.1 dBHL, and 23.1 dBSPL or 3.1 dBHL for sentence lists.@*CONCLUSION@#The study established the P-I function of the Mandarin monosyllabic and sentence materials with equal difficulty, which provides the normative data for identifying the normal hearing in a clinical setting.