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听力级
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  hearing level
     Results The average of hearing threshold (hearing level) of air conduction was (50.7 ± 12.1) dB before operation, and the hearing loss was mostly on low frequency.
     语言频率气导听力(听力级,下同)增进 15dB以上或者达到应用听力水平为手术成功标准。 结果 本组患者术前气导听力平均(50.7±12.1)dB,听力损失主要以低频为主。
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     At 75 dBHL,the latent periods of waves Ⅰ,Ⅲ and Ⅴ wererespectively 1.74±0.10 msec,3.82±0.16 msec and 5.64±0.21 msec,and these periodswere prolonged while the stimulus intensity decreased.
     在75分贝(听力级)时,Ⅰ、Ⅱ、Ⅴ波的潜伏期分别为1.74±0.10毫秒、3.82±0.16毫秒和5.64±0.21毫秒。
短句来源
     The average pure tone threshold were 105. 5 dB HL, ABR threshold were >95 dB nHL and 40 Hz threshold in 500 Hz were 101. 7 dB. The devices they used were Nucleus 22M in 27 ears, 24M in 308 ears, 24R Contour in 131 ears and 24R ST in 21 ears;
     术前纯音听阈(听力级)为105.5 dB,听性脑干反应阈>95 dB,40 Hz相关电位(500 Hz)>101.7 dB。 使用装置:Nucleus 22M 27耳,24M 308耳,24R Contour 131耳,24RST 21耳;
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     At 75 and 65 dBHL,the in-teraural latency differences were within 0.25 msec.
     75和65分贝(听力级)时,两耳Ⅴ波潜伏期差值均在0.25毫秒以内。
短句来源
     A decreased magnitude of N_1 waves was observed only when the arterial blood PO_2 was on an average of 5.2kPa, and when the stimulus intensities were 10 dB above the threshold.
     以耳蜗总和动作电位(CAP)为耳蜗功能衰变的指标,观察耳蜗功能衰变时的血PO_2值。 结果表明平均动脉血PO_2降低到52kPa时,用短声阈上10dB(听力级)强度刺激引起CAP的N_1波波幅降低;
短句来源
     Closure of the air-bone gap (ABG) post-operation were gained in all cases, and ABG gains 20 dB or more occurred in 512 ears (77.57%), but 30 dB or more in 231 ears (35%).
     术后听力改善(听力级,下同)20dB以上者512耳,占77 6%; 其中改善30dB以上者231耳,占35%。
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  相似匹配句对
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     AUDIOMETRIC ZERO LEVEL AT INFRASONIC FREQUENCIES
     次声频段的听力
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     Listening Training of CET Band 6
     如何训练六听力
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     On the Grade "ji"
     说“
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     Probing into the mystery of English listening comprehension
     英语听力探秘
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  hearing level
A statistically significant correlation was found between the density of the area A-OW and the hearing level at 500 and 1,000?Hz, and between the density of the area around the cochlea and the hearing level at most frequencies.
      
It is significant to follow up patients with sudden deafness, because the change of hearing level after a long-term period and a differential diagnosis from Menière's disease must be studied.
      
We could demonstrate that the once recovered hearing level rarely deteriorated afterwards, but the not recovered hearing level would sometimes deteriorate.
      
Die Latenz dieser positiven Welle nach ~ 6 ms zeigt eine feste Beziehung zur Reizlautst?rke: ~ 9,5 ms an der H?rschwelle, ~ 5,8 ms bei 100 dB CHL (click hearing level).
      
All patients were seen at our university hospital within 2 weeks after the onset of their hearing losses and were observed until the hearing level was fixed.
      
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Brainstem auditory evoked response(BAER)to clicks was recorded in 36 subjectswith normal hearing.At 75 dBHL,the latent periods of waves Ⅰ,Ⅲ and Ⅴ wererespectively 1.74±0.10 msec,3.82±0.16 msec and 5.64±0.21 msec,and these periodswere prolonged while the stimulus intensity decreased.However,the interval betweenlatent periods of waves was relatively independent of the sitmulus intensity,the latencyinterval between waves Ⅴ and Ⅰ being 3.89±0.21 msec.At 75 and 65 dBHL,the in-teraural latency differences were within...

Brainstem auditory evoked response(BAER)to clicks was recorded in 36 subjectswith normal hearing.At 75 dBHL,the latent periods of waves Ⅰ,Ⅲ and Ⅴ wererespectively 1.74±0.10 msec,3.82±0.16 msec and 5.64±0.21 msec,and these periodswere prolonged while the stimulus intensity decreased.However,the interval betweenlatent periods of waves was relatively independent of the sitmulus intensity,the latencyinterval between waves Ⅴ and Ⅰ being 3.89±0.21 msec.At 75 and 65 dBHL,the in-teraural latency differences were within 0.25 msec.The mean value of the detectablethreshold of wave Ⅴ was 10 dB above the behavior threshold to click.Therefore,BAER is a useful aid in the objective estimation of hearing acuity.

本文报道以宽频带短声为刺激,记录了36名听力正常者的脑干听觉诱发电位。在75分贝(听力级)时,Ⅰ、Ⅱ、Ⅴ波的潜伏期分别为1.74±0.10毫秒、3.82±0.16毫秒和5.64±0.21毫秒。各波的潜伏期随着刺激强度减低而延长,但波间潜伏期差值相对地不受刺激强度的影响。Ⅴ波与Ⅱ波潜伏期差值为3.89±0.21毫秒。75和65分贝(听力级)时,两耳Ⅴ波潜伏期差值均在0.25毫秒以内。Ⅴ波反应阈平均在主观听阈上为10分贝。故脑干诱发电位可用于客观听力检查。

Although the importance of monitoring depth of anesthesia has been recognized for a long time, there has been no simple, accurate and objective method to determine depth of anethesia. In this paper, the effects of fentanyl on the middle latency auditory evoked potentials (MLAEP), including the time domain, frequency domain and AR—model parameters, in cats are studied for the purpose of exploring the possibility of measuring anesthetic depth through MLAEP and proposing some new efficient and reliable techniques...

Although the importance of monitoring depth of anesthesia has been recognized for a long time, there has been no simple, accurate and objective method to determine depth of anethesia. In this paper, the effects of fentanyl on the middle latency auditory evoked potentials (MLAEP), including the time domain, frequency domain and AR—model parameters, in cats are studied for the purpose of exploring the possibility of measuring anesthetic depth through MLAEP and proposing some new efficient and reliable techniques for clinical use. It is demonstrated that the parameters of AR—model, |A1| and an argument θ on pole distributions are more sensitive to fentanyl than those of time domain, such as latencies of Na and Pa and amplitude of Pa wave. As a result, we suggest that several feature parameters be considered simutaneously during surgery in order to obtain more reliable measurements.

准确地监测病人术中麻醉深度具有重要的临床意义,特别是现代复合麻醉技术的应用给医生判断麻醉深度带来了更大的困难。迄今为止,仍然没有一个客观、简便且准确的监测麻醉深度的方法。针对这一问题,本文通过分组动物实验,研究了芬太尼对猫中潜伏期听觉诱发电位(MLAEP)的影响,以探讨用诱发电位作为麻醉监测手段的可能性,并为临床提供有效、客观监测指标。将21只猫随机等分成三组:A组高浓度芬太尼组、B组空白对照组和C组低浓度芬太尼组。用苯巴比妥钠镇静之后,给肌松药并插管人工控制呼吸。芬太尼或等量生理盐水分三次由静脉注射,每次间隔20min,给总量的1/3。在给药前及每次给药后5min和15min时分别记录左右耳MLAEP,模拟信号频率范围10~250Hz,描记后经数字化送入计算机。记录电极置于头顶,左右耳后为参考。由波宽100μs的方波送入耳机产生短声刺激,刺激频率9.7次/s,刺激强度90dB听力级。MLAEP扫描时间50ms,迭加次数512次。数字信号采样率1.28kHz。A组动物在每次记录MLAEP的同时采动脉血样以测室血中芬太尼含量。随机选取9只动物做血气分析。实验过程中监测动物动脉血压及体温并维持恒定。首...

准确地监测病人术中麻醉深度具有重要的临床意义,特别是现代复合麻醉技术的应用给医生判断麻醉深度带来了更大的困难。迄今为止,仍然没有一个客观、简便且准确的监测麻醉深度的方法。针对这一问题,本文通过分组动物实验,研究了芬太尼对猫中潜伏期听觉诱发电位(MLAEP)的影响,以探讨用诱发电位作为麻醉监测手段的可能性,并为临床提供有效、客观监测指标。将21只猫随机等分成三组:A组高浓度芬太尼组、B组空白对照组和C组低浓度芬太尼组。用苯巴比妥钠镇静之后,给肌松药并插管人工控制呼吸。芬太尼或等量生理盐水分三次由静脉注射,每次间隔20min,给总量的1/3。在给药前及每次给药后5min和15min时分别记录左右耳MLAEP,模拟信号频率范围10~250Hz,描记后经数字化送入计算机。记录电极置于头顶,左右耳后为参考。由波宽100μs的方波送入耳机产生短声刺激,刺激频率9.7次/s,刺激强度90dB听力级。MLAEP扫描时间50ms,迭加次数512次。数字信号采样率1.28kHz。A组动物在每次记录MLAEP的同时采动脉血样以测室血中芬太尼含量。随机选取9只动物做血气分析。实验过程中监测动物动脉血压及体温并维持恒定。首先,分析了芬太尼对猫MLAEP时域特性,即Na、Pa潜伏期和Pa幅值的影响。之后,用参数模型(11阶AR模型)方法做MIAEP信号的功率谱估计,研究了芬太尼对猫MLAEP信号谱峰位置的影响。进而,利用所建立的参数模型,提取5阶AR模型的系数、模型极点分布等特征量,寻找能准确反映麻醉深度的客观指标。经过组内分析和组间比较,得出:1.芬太尼对猫MLAEP的Na、Pa潜伏期及Pa幅值没有显著影响。2.芬太尼对猫MLAEP信号的功率谱谱峰位置没有显著影响。3.猫MLAEP信号的AR模型系数|A_1|和模型极点分布复平面上“小幅角”θ的大小随猫血中芬太尼浓度的增加明显减小。上述结果表明,本文所提出的MLAEP信号的AR模型特征量可以比其时域特性更敏感地反映芬太尼的作用,因此当芬太尼的用量与麻醉深度的关系建立以后,可以作为监测麻醉深度的客观指标。我们建议临床上利用MLAEP监测麻醉深度时,应同时考虑其时域和频域的多种参量,以确保判断结果的可靠性。

A Progressive decrease in arterial PO_2 was induced by self-breathing of the air from a closed circuit instrument in guinea pigs. N_1 waves of cochlear action potential varied as the progressive decrease of the blood oxygen. A decreased magnitude of N_1 waves was observed only when the arterial blood PO_2 was on an average of 5.2kPa, and when the stimulus intensities were 10 dB above the threshold. Hearing threshold changeed in all the experimental animals when the arterial blood PO_2 fell to 4.3kPa. It is suggested...

A Progressive decrease in arterial PO_2 was induced by self-breathing of the air from a closed circuit instrument in guinea pigs. N_1 waves of cochlear action potential varied as the progressive decrease of the blood oxygen. A decreased magnitude of N_1 waves was observed only when the arterial blood PO_2 was on an average of 5.2kPa, and when the stimulus intensities were 10 dB above the threshold. Hearing threshold changeed in all the experimental animals when the arterial blood PO_2 fell to 4.3kPa. It is suggested that 5.2kPa should be the "critical level" at which cochlear function begin to fail in guinea pigs.

通过豚鼠自主呼吸闭路循环装置中的空气进行研究,其中呼出气中的CO_2被吸收。随着呼吸引起吸入气中O_2量逐渐降低,诱发动脉血PO_2下降。以耳蜗总和动作电位(CAP)为耳蜗功能衰变的指标,观察耳蜗功能衰变时的血PO_2值。结果表明平均动脉血PO_2降低到52kPa时,用短声阈上10dB(听力级)强度刺激引起CAP的N_1波波幅降低;动脉血PO_2降至4.3kPa时,所有的实验动物都发生了阈移。本研究提示平均动脉血PO_2在5.2kPa是豚鼠耳蜗功能衰变的阈值,并对其机制进行了探讨。

 
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