Objective:To investigate if routine audiometry in Bell’s palsy patients has prognostic value.Methods:Retrospective case review was conducted on all Bell’s palsy patients(n紏191)seen at the tertiary otolaryngology sp...Objective:To investigate if routine audiometry in Bell’s palsy patients has prognostic value.Methods:Retrospective case review was conducted on all Bell’s palsy patients(n紏191)seen at the tertiary otolaryngology specialist outpatient clinic from 2015 to 2017.Correlation of ipsilesional audiometric thresholds with patients’time-to-recovery and initial clinical severity(measured by House-Brackmann(HB)scoring)were used for the prognostic outcome measure.Audiometry results were analyzed using three contiguous frequency pure-tone average(1kHz,2kHz,4kHz).Statistical analysis was done via Stata(v13.1),significance tests were 2-sided at 5%significance level.Results:There was no significant difference between audiometric thresholds between the ipsilesional ear and the contralateral ear(p=0.87).Time-to-recovery was significantly longer for patients with severe initial presentation as compared to mild and moderate severity(p<0.01).There was no correlation found between the audiometry results and HB score at presentation(p=0.39).There was no correlation found between ipsilesional audiometric thresholds and time-to-recovery(p=0.58).Conclusion:Our study suggests that routine audiometry has limited prognostic value in Bell’s palsy patients.展开更多
It′s generally believed that the appropriate stimuli for sound field tests are warble tones and narrow band noise, while pure tone can only be a signal used in the free field and earphone listening conditions. In thi...It′s generally believed that the appropriate stimuli for sound field tests are warble tones and narrow band noise, while pure tone can only be a signal used in the free field and earphone listening conditions. In this study, we take a measurement of sound pressure distribution, sound field variability, and effects of frequency shifting on sound pressure levels (SPLs) at reference points of pure tone in an audiometric test room. It was found that the pure tone SPLs were also distributed uniformly at some sound field areas although it was not so well as warble tones. This indicated that the test results were relatively stable to head movement and/or frequency shifting in those regions, which was confirmed by the clinical measurements on 20 subjects with severe sensorineural hearing loss. Our study concluded that pure tones could also be suitable for sound field audiometry if subjects were seated at a proper location on the basis of the sound field calibrations.展开更多
文摘Objective:To investigate if routine audiometry in Bell’s palsy patients has prognostic value.Methods:Retrospective case review was conducted on all Bell’s palsy patients(n紏191)seen at the tertiary otolaryngology specialist outpatient clinic from 2015 to 2017.Correlation of ipsilesional audiometric thresholds with patients’time-to-recovery and initial clinical severity(measured by House-Brackmann(HB)scoring)were used for the prognostic outcome measure.Audiometry results were analyzed using three contiguous frequency pure-tone average(1kHz,2kHz,4kHz).Statistical analysis was done via Stata(v13.1),significance tests were 2-sided at 5%significance level.Results:There was no significant difference between audiometric thresholds between the ipsilesional ear and the contralateral ear(p=0.87).Time-to-recovery was significantly longer for patients with severe initial presentation as compared to mild and moderate severity(p<0.01).There was no correlation found between the audiometry results and HB score at presentation(p=0.39).There was no correlation found between ipsilesional audiometric thresholds and time-to-recovery(p=0.58).Conclusion:Our study suggests that routine audiometry has limited prognostic value in Bell’s palsy patients.
文摘It′s generally believed that the appropriate stimuli for sound field tests are warble tones and narrow band noise, while pure tone can only be a signal used in the free field and earphone listening conditions. In this study, we take a measurement of sound pressure distribution, sound field variability, and effects of frequency shifting on sound pressure levels (SPLs) at reference points of pure tone in an audiometric test room. It was found that the pure tone SPLs were also distributed uniformly at some sound field areas although it was not so well as warble tones. This indicated that the test results were relatively stable to head movement and/or frequency shifting in those regions, which was confirmed by the clinical measurements on 20 subjects with severe sensorineural hearing loss. Our study concluded that pure tones could also be suitable for sound field audiometry if subjects were seated at a proper location on the basis of the sound field calibrations.
文摘目的探讨先天性婴幼儿单侧听神经发育不良(cochlear nerve deficiency,CND)患者的听力学特征。方法将内耳磁共振成像(MRI)显示为单侧听神经发育不良的21例(21耳)患者作为研究对象,其中男9例,女12例,年龄10个月~7岁,(1.91±1.38)岁,回顾性分析患者的行为测听与听性稳态反应(ASSR)阈值相关性、chirp声诱发听性脑干反应(chirp-ABR)、耳声发射(OAE)等结果,分析听神经发育不良者的听力学特征。结果21例(21耳)听神经发育不良患者行为测听、chirp-ABR听性脑干反应、听性稳态反应ASSR结果均提示患耳呈重度-极重度听力损失,行为测听阈值与听性稳态反应ASSR阈值有高度相关性,ASSR和行为测听的差值较小。76.2%(16/21)听神经发育不良耳可在90~100 dB nHL高强度声刺激下引出ABR,但ABR振幅减小,Ⅲ波和Ⅴ波潜伏期延长。结论听神经发育不良患者ASSR与行为测听的差值小,A-ABR引不出,OAE存在一定假阴性率,ABR引出多以Ⅲ波为主,潜伏期延长,阈值为极重度,以上听力学特征可提高CND早期发现与诊断率,提升干预效果。
