短纯音ABR在听力阈值评估中的应用

当一定强度的声音刺激听觉器官时,听觉系统就会产生一系列的电活动,称为听觉诱发电位(auditory evoked poten-tials,AEP)。听性脑干反应(auditory brainstemresponse,ABR)是AEP的一种,即声音刺激后出现的短潜伏期反应。ABR在不同年龄的人群中都能记录到,并具有很好的稳定性。AB     

正常成人短纯音ABR反应阈与纯音听阈的相关性研究

目的 探讨正常成人短纯音ABR反应阈(tone burst ABR,tb-ABR)与纯音听阈的相关性.方法对34例(68耳)正常成人分别进行0.5、1.0、2.0、4.0 kHz纯音听阈和tb-ABR测试,分析其tb-ABR反应阈与纯音听阈的相关性.结果68耳0.5、1.0、2.0、4.0 kHz tb-ABR反应阈分别为:27.43±3.29、25.98±2.76、16.78±2.37、12.42±2.64 dB n H L,纯音平均听阈分别为12.23±3.99、11.82±2.56、9.58±3.23、9.92±2.59 dB H L;tb-ABR反应阈与纯音听阈在0.5、1.0、2.0、4.0 kHz的差值分别为12.13±4.51、11.43±3.66、7.61±2.43、7.17±1.32 dB;两者的Pearson相关系数分别为0.69、0.79、0.84、0.89.结论tb-ABR反应阈与纯音听阈有相关性,tb-ABR具有频率特异性,能更好地反映各频率听力,可用于儿童听力评估.     

短纯音诱发的AP—SP复合波和滤波短声诱发AP的比较

本文用慢性园窗电极方法，记录豚鼠耳蜗电位，对短纯音诱发的AP－SP复合波和滤波短声诱发的AP波进行比较，结果提示用短纯音诱发的AP－SP复合波在各个频率波形分化清楚，具有较好的频率选择性，无论是正常听力，中耳疾患还是内耳病变的豚鼠，AP－SP复合波如同AP波一样，均可获得电反应的听力曲线，且AP－SP复合波对内耳病变更为敏感。     

健听青年颅顶慢反应和短纯音ABR反应阈与纯音听阈的比较

目的 通过比较健听青年颅顶慢反应(slow vertex response,SVR)阈和短纯音听性脑干反应(toneb-urst auditory brainstem response,tb-ABR)阈与纯音听阈(pure tone audiometry,PTA)的关系,探讨SVR和tb-ABR用于听阈评估的价值.方法 对30例健听青年分别进行双耳0.5、1、2、4 kHz频率的tb-ABR、SVR反应阈及PTA测试,比较各频率SVR、tb-ABR反应阈与纯音听阈的差值及其相关性.结果 SVR反应阈与PTA在0.5 kHz频率处的差值最小,为3.59±7.32 dB,在1、2、4 kHz频率的差值分别为6.92±5.07、8.33±6.71、9.83±9.41 dB;tb-ABR反应阈与PTA在4 kHz频率处的差值最小,为14.58±7.24 dB,在0.5、1、2 kHz频率处的差值分别为29.42±6.83、23.25±7.47、16.50±6.43 dB;各频率SVR和tb-ABR反应阈与PTA差异均有统计学意义(均为P<0.05).SVR与PTA在1、2 kHz处有较好相关性(分别为r=0.51,P<0.01和r=0.44,P<0.05);tb-ABR与PTA在4 kHz处有较好相关性(r=0.53,P<0.01).结论 在听力正常的青年人群中,SVR和tb-ABR反应阈均能较好地预估PT A,前者更接近PT A.     

正常成年Wistar大鼠短声及短纯音听性脑干反应波形分析

目的：分析正常 Wistar 大鼠短声（click）及短纯音（tone burst,TB）诱发听性脑干反应（cABR、tb-ABR）结果,标准化 Wistar大鼠ABR测试方法,为大鼠听觉研究提供参考。方法正常成年雄性 Wistar 大鼠15只,分别进行cABR和tbABR（4、8、12、16、24、32 kHz）测试,观察80、50、20 dB SPL 强度下各波的引出率,以引出率最高的波来判断阈值,同时量取该波的潜伏期和幅值,检测ABR波Ⅱ、Ⅳ振幅I／O曲线。结果①20 dB SPL强度下cABR和tbABR波Ⅱ和波Ⅳ最晚消失的比例几乎相同;②cABR 阈值为21．83±4．45 dB SPL,4～32 kHz 频率tbABR阈值分别为24．33±5．37、14．17±4．37、14．33±4．68、16．67±4．22、23．00±5．81、31．00±7．36 dB SPL;③80 dB SPL cABR波Ⅰa、Ⅰb、Ⅱ、Ⅲ、Ⅳ、Ⅴ潜伏期分别为1．76±0．12、2．13±0．11、2．67±0．16、3．49±0．28、4．39±0．29、5．45±0．41 ms,tbABR 4 kHz波Ⅰa、Ⅰb、Ⅱ、Ⅲ、Ⅳ、Ⅴ潜伏期分别为2．02±0．09、2．88±0．16、3．77±0．25、4．69±0．29、5．78±0．41 ms,8 kHz分别为1．76±0．07、2．28±0．10、2．63±0．16、3．49±0．21、4．44±0．28、5．48±0．43 ms,12 kHz分别为1．76±0．08、2．24±0．12、2．61±0．25、3．53±0．25、4．46±0．32、5．52±0．45 ms,16 kHz分别为1．79±0．10、2．25±0．12、2．70±0．18、3．62±0．27、4．52±0．37、5．61±0．49 ms,24 kHz分别为1．75±0．09、2．27±0．11、2．67±0．16、3．60±0．27、4．52±0．38、5．60±0．51 ms,32 kHz分别为1．77±0．10、2．24±0．12、2．64±0．20、3．59±0．34、4．52±0．40、5．61±0．52 ms;④I／O曲线示在高强度时波Ⅱ振幅明显高于波Ⅳ,但在低强度时,波Ⅱ振幅与波Ⅳ基本相同,甚至波Ⅳ振幅高于波Ⅱ。结论正常成年大鼠短声及短纯音诱发ABR波Ⅳ出现率最高,低强度声刺激时,波Ⅱ、Ⅳ振幅基本相同,甚至波Ⅳ振幅高于波Ⅱ,可以波Ⅳ最后消失的强度为阈值。     

ASSR、Tb-ABR和c-ABR在正常听力人群客观听阈评估中的相关性分析

目的：研究多频听觉稳态反应（ASSR）、短纯音听觉脑千诱发电位（Tb-ABR）和短声听觉脑干诱发电位（c-ABR）反应阈与纯音听阈（PTA）在正常听力人群中的差别和相关性。方法：对正常听力的受试者（共58耳）进行ASSR、Tb-ABR和c-ABR以及纯音测听检查,分别得出前三者测试的反应阂并与PTA进行相关性分析。结果：ASSR和Tb-ABR的反应阈均与同频率的PTA具有良好的相关性;Tb-ABR的反应阈与PTA的值接近,ASSR反应阈与PTA间的差值较大;c-ABR与PTA2、4kHz听阈的均值呈线性相关。结论：ASSR和Tb-ABR都是较好的评估行为听阚的频率特异性客观测听方法,Tb-ABR结合c-ABR能较好地反映PTA。     

短纯音及切迹噪声掩蔽的短纯音ABR用于儿童听力评估的研究

目的研究儿童短纯音（tone burst）及同侧切迹噪声（notched noise）掩蔽短纯音诱发的ABR反应阈,与短声诱发的听性脑干反应（click-evoked auditory brainstem response,c-ABR）以及40Hz听觉事件相关电位（40Hz Auditory Event Related Potentials,40Hz AERP）反应阈的关系,以评价这些测试方法在儿童听力评估中的应用价值。方法应用SmartEP听觉诱发电位仪在29例（53耳）儿童（男18例,女11例,年龄2月-8岁）中测试短声ABR、短纯音ABR、两种不同强度切迹噪声掩蔽短纯音诱发的ABR（分别定义为c-ABR、tb-ABR、amtb-ABR和bmtb-ABR）及40Hz AERP。结果（1）fb-ABR、amtb-ABR、bmtb-ABR在2kHz、4kHz两个频率的反应阈与c-ABR的反应阈接近,反应阈之间有较好的相关性;（2）tb-ABR、amtb-ABR、bmtb-ABR的反应阈与40Hz AERP的反应阈在0.5、1、2、4kHz各个频率均接近并有较好的相关性。结论使用短纯音及同侧切迹噪声掩蔽短纯音诱发的ABR的反应阈预测儿童的纯音行为听阈是可行的。     

短纯音诱发的听性脑干反应测试中声诱发短潜伏期负反应研究

目的 总结在有听力损失儿童中行短纯音诱发的听性脑干反应(tbABR)测试时记录到的声诱发短潜伏期负反应(acoustically short latency negative response,ASNR)的特点.方法 在有听力损失的0～6岁儿童中应用SmartEP听觉诱发电位仪记录短声和短纯音ABR的反应阈,在记录到ASNR的受试者中分析其反应阈和潜伏期.结果 在所有80受试耳中共7耳(8.75%)在cABR测试中引出ASNR,40耳(50%)在tbABR测试中引出ASNR,其中1 kHz引出率最高(37耳,46.25%),2 kHz次之(25耳,31.25%).引出ASNR者ABR波V反应阈最低65 dB nHL,ASNR反应阈最低80 dB nHL.0.5、1、2和4 kHz短纯音诱发的ASNR潜伏期分别为6～8、5～7、3～5、3～4 ms.随刺激强度的增加,其潜伏期缩短.结论 有听力损失的儿童tbABR测试中可以记录到AS-NR,但不影响以波V反应阈评估听力.     

耳科正常成人短纯音及切迹噪声掩蔽短纯音诱发的ABR比较

目的在耳科正常成人中比较短纯音（tone burst）及同侧切迹噪声（notched noise）掩蔽短纯音诱发的听性脑干反应（ABR）反应阈对纯音听阔的预估;研究短纯音及两种不同强度切迹噪声掩蔽短纯音诱发的ABR（分别命名为tb—ABR、amtb—ABR和bmtb—ABR）的波形特点及差异。方法对20例（40耳）耳科正常人行纯音测听,并记录短纯音ABR和两种不同强度切迹噪声掩蔽短纯音诱发的ABR,对结果进行分析比较。结果①相同频率tb—ABR、amtb—ABR、bmtb—ABR的反应阈接近,无统计学差异。②各频率tb—ABR、amtb—ABR、bmtb—ABR反应阚与相应频率纯音听阈之差的平均值均在15dB以内。在相同频率,三种测试方法所得的反应阈与纯音听阈之差的平均值接近,无统计学差异。③在相同刺激强度,无论采用哪种测试方法,波V潜伏期均随频率升高而缩短。当刺激强度和频率相同时,波V潜伏期均表现为tb-ABR最短,amtb—ABR次之,bmtb—ABR最长,差异具有统计学意义。结论短纯音及同侧切迹噪声掩蔽短纯音诱发的ABR的反应阈均可用于预估纯音听阚。     

正常青年人短纯音ABR和ASSR的相关性研究

目的比较正常青年人短纯音听性脑干反应（auditory brainstem response，ABR）和听性稳态反应（auditory steady-state response，ASSR）反应阈的差异及相关性。方法对10名（20耳）听力正常青年人进行短纯音ABR和ASSR反应阈测试，分别记录0．5．1、2和4 kHz的反应阈，比较这两种不同测试方法所得反应阈的特点及相关性。结果短纯音ABR和ASSR反应阈无显著性差异（P〉O．05），两者在0．5、1、2和4 kHz处的相关系数分别为0．49、0．52．0．64和0．76。结论正常青年人短纯音ABR反应阈和ASSR反应阈存在一定的相关性，高频处的相关性较低频好。     

68例感音神经性耳聋患者ASSR测试听阈与ABR测试V波反应阈的相关性研究

目的旨在探讨ASSR与ABR在诊断感音神经性耳聋中的相关性。方法68例临床诊断为感音神经性耳聋患者分别行0．5kHz，1kHz，2kHz，4kHzASSR测试及ABR测试，进行不同耳别、不同测试频率ASSR阈值与不同耳别ABRV波反应阈之间的相关分析。结果除了0．5kHz ASSR阈值与ABRV波反应阈的相关系数低而无显著意义外，1kHz，2kHz，4kHz ASSR阈值均与ABRV波反应阈有极显著性相关（P〈0．01），且随着测试频率的递增两者的相关系数随之增加，尤其是4kHz ASSR与ABRV波相关系数达到0．95以上（P〈0．01）。结论ASSR诊断感音神经性耳聋是可靠客观的，具有频率特性，可弥补ABR测试在诊断耳聋疾病中的频率局限性。     

电极位置和滤波对婴幼儿短纯音诱发听性脑干反应阈值的影响

目的比较婴幼儿记录电极置于颅顶、滤波为30-1500Hz(简称第一组测试参数)与记录电极置于前额发际、滤波为30-3000Hz(简称第二组测试参数)各频率短纯音听性脑干反应(Auditory Brain Stem Re-sponse,ABR)阈值之间的差别,总结两种记录参数下短纯音ABR(tone burst ABR,tb-ABR)波形特点对阈值判断的影响,选择更优化的tb-ABR测试条件。方法应用SmartEP听觉诱发电位仪(美国IHS公司)记录0-6月龄婴幼儿短声及上述两种记录参数下tb-ABR各频率反应阈,共12例(10男/2女)20耳。结果 0.5kHz、1kHz、2kHz、4kHz记录电极置于前额发际、滤波为30-3000Hz时tb-ABR反应阈比记录电极置于颅顶、滤波为30-1500Hz时tb-ABR反应阈分别高7.00±5.5、7.25±6.0、7.25±4.7、8.00±5.5dB。各频率两种记录参数下tb-ABR反应阈之间差异均有统计学意义(t值分别为5.715、5.445、6.866、6.532,P值均<0.01)。同等强度时,两种记录参数下tb-ABR各波振幅差别明显,第一组测试参数下tb-ABR各波振幅高于第二组测试参数下tb-ABR各波振幅,前者的反应曲线较后者平滑,波V更容易辨认。结论用短纯音诱发ABR评估婴幼儿听力时,记录电极置于颅顶、滤波为30-1500Hz时各频率测试时反应阈和波形均优于记录电极置于前额发际、滤波为30-3000Hz,可提供更好的阈值测试结果。     

Neonatal hearing screening: a combined click evoked and tone burst otoacoustic emission approach

OBJECTIVE: This study evaluated an alternative transient evoked otoacoustic emissions method for screening hearing in newborn babies that may reduce the referral rate of initial screening. METHODS: A total of 1,033 neonates (2,066 ears) from two hospitals were recruited. Subjects had their hearing screened in both ears using a combined approach-both click evoked OAEs (CEOAEs) and 1kHz tone burst evoked OAEs (TBOAEs). RESULTS: 1kHz TBOAEs were more robust than CEOAEs in terms of emission response level and signal-to-noise ratio (SNR) at both 1 and 1.5kHz frequency bands. The prevalence rate for CEOAE and TBOAE responses in these two frequency bands was significantly different. The combined protocol significantly reduced the referral rate-by almost 2 percentage points for first time screening. CONCLUSIONS: The implementation of a combined 1kHz TBOAE/CEOAE screening protocol is a feasible and effective way to reduce referral rates, and hence false positive rates, in neonatal hearing screening programs.     

Preliminary application of intra-operative hearing monitoring by tone pip ABR via loudspeakers

Conclusion: This method might be an effective intra-operative way to access hearing threshold under general anesthesia in the operating room.

Objective: To develop an intra-operative hearing monitoring method for surgeons to access hearing threshold under general anesthesia in the operating room.

Method: System establishment and calibration was done firstly. Normal hearing (NH) and conductive hearing loss (CHL) participants were recruited. This study applied pure tone audiometry (PTA) to all subjects and tone pip ABR (tp-ABR) via loudspeakers in sound booth and operating room for NH and CHL subjects, respectively. For NH subjects, Bland Altman was conducted to compare 1k Hz PTA and tp-ABR threshold. For CHL participants, Paired t-test, Satterth waite t’-test, and linear correlation analysis were used to compare the two methods. p?Results: (1) Bland Altman showed all plots were inside the 95% confidence interval, indicating that there was no difference between the two methods for NH subjects. (2) The two methods had a high correlation (Pearson’s coefficient =0.872?>?0.6, p?t’-test showed the ossicular chain malfunction enlarged the deviation of threshold by the two methods (.01?p?相似文献   

0～6岁听力损失儿童短纯音诱发的听性脑干反应研究

目的比较听力损失儿童短纯音听性脑干反应（auditory brainstem response，ABR）反应阈与40Hz听觉事件相关电位（auditory event-related potentials，AERP）及短声ABR反应阈的相关性，评价短纯音ABR在儿童听力评估中的应用。方法应用SmartEP听觉诱发电位仪在0～6岁听力损失儿童中记录短声、短纯音ABR及40 Hz AERP的反应阈，共43例85耳（男／女=27／16）。结果0．5、1、2kHz短纯音ABR反应阈与40 Hz AERP反应阈的线性相关系数分别为0．84、0．80、0．80，反应闯之差分别为3．6±12．2、5．9±14．8、1．7±13.7dB。0．5、1、2、4kHz短纯音ABR反应阈与短声ABR反应阈的线性相关系数分别为0．81、0．89、0．94、0．91，反应阈之差分别为6．6±13．4、0．2±10．7、1．5±8．1、4．2±10．2dB。2kHz、4kHz短纯音反应阈的平均值与短声ABR反应阈的线性相关系数为0．93，反应阈之差为2．8±8．3dB。结论短纯音ABR的反应阈可作为一种儿童听力评估的方法。     

Tone-evoked brainstem responses and auditory steady state responses to 40hz and 80hz amplitude modulated stimuli with different frequencies — a comparative study

Abstract  Tone burst evoked auditory brainstem responses and auditory steady state responses with 40 or > 80 Hz modulation can be used to determine frequency specific threshold. Aim  The present study was taken up to check for the efficacy of estimating hearing thresholds by tone burst ABR and ASSR. The frequency effect (low, mid and high) on estimating the threshold was also focused upon. Methods  20 normal hearing adults (40 ears) in the age range of 16 to 30 years participated in the study. The pure tone audiometry and immittance was initially done. Subsequently, tone-burst ABR, 80Hz ASSR and 40Hz ASSR to estimate the threshold with three frequencies 500Hz (low), 2000Hz (mid) and 4000Hz (high) was done. The data was analyzed statistically using pair sample t-test. Results  ASSR threshold for 80Hz and 40Hz was almost comparable. ASSR was superior to estimate the threshold than tone-burst ABR. For the low frequency the discrepancy between the behavioral threshold and frequency-specific evoked audiometry was more when compared to mid and high frequency. Conclusion  Present study showed that steady-state responses were efficient means of threshold detection than visual detection of ABR wave-V. In awake adult subjects, 40Hz and 80Hz amplitude modulated produced similar results. For the threshold estimation ASSR was better than tone-burst ABR.     

3种不同条件短纯音诱发听性脑干反应频率特异性观察

目的 :观察比较线性窗短纯音、加宽频带噪声掩蔽的线性窗短纯音及Blackman窗门控短纯音对听性脑干反应 (ABR)频率特异性的影响。方法 :16例听力正常成年人分别接受 3种不同条件短纯音诱发的ABR测试 ,记录各自在 1、2、4kHz不同声强下的ABR波V潜伏期。结果与结论 :① 4、2kHz各刺激声强及 1kHz 70dBnHL以下声强时 ,3种不同条件短纯音有着相同的频率特异性 ;在低频 (1kHz)高声强 (≥ 70dBnHL)时 ,线性窗短纯音因有频谱播散现象而需加用掩蔽噪声来改善频率特异性或需直接采用Blackman窗门控短纯音。②宽频带噪声掩蔽短纯音及Blackman窗门控短纯音在 1、2、4kHz各刺激强度下可获得相同的频率特异性反应 ,但宽频带噪声掩蔽短纯音诱发的反应振幅相对较小 ,因此Blackman窗短纯音更为可取     

Comparison between ABR with click and narrow band chirp stimuli in children

Objective

Click and chirp-evoked auditory brainstem responses (ABR) are applied for the estimation of hearing thresholds in children. The present study analyzes ABR thresholds across a large sample of children's ears obtained with both methods. The aim was to demonstrate the correlation between both methods using narrow band chirp and click stimuli.

Methods

Click and chirp evoked ABRs were measured in 253 children aged from 0 to 18 years to determine their individual auditory threshold. The delay-compensated stimuli were narrow band CE chirps with either 2000 Hz or 4000 Hz center frequencies. Measurements were performed consecutively during natural sleep, and under sedation or general anesthesia. Threshold estimation was performed for each measurement by two experienced audiologists.

Results

Pearson-correlation analysis revealed highly significant correlations (r = 0.94) between click and chirp derived thresholds for both 2 kHz and 4 kHz chirps. No considerable differences were observed either between different age ranges or gender. Comparing the thresholds estimated using ABR with click stimuli and chirp stimuli, only 0.8–2% for the 2000 Hz NB-chirp and 0.4–1.2% of the 4000 Hz NB-chirp measurements differed more than 15 dB for different degrees of hearing loss or normal hearing.

Conclusion

The results suggest that either NB-chirp or click ABR is sufficient for threshold estimation. This holds for the chirp frequencies of 2000 Hz and 4000 Hz. The use of either click- or chirp-evoked ABR allows a reduction of recording time in young infants. Nevertheless, to cross-check the results of one of the methods, we recommend measurements with the other method as well.