Mora J A, Expósito M, Solís C, Barajas J J
Clínica Barajas, Santa Cruz de Tenerife, Canary Islands, Spain.
Audiology. 1990;29(6):329-35. doi: 10.3109/00206099009072864.
Auditory middle-latency responses (MLR) have been recorded in 25 newborns at 60 dB nHL using two wide band-pass filter conditions and a slow stimulation rate of 2/s. With both types of filter, the MLR consisted in an initial positive wave followed by a negative component (Na) and a positive component (Pa). In newborns, this positive component appears in the vicinity of 45 ms and is more prolonged than the Pa of the MLR in adults. The probability of obtaining MLR after averaging only 500 signals was higher with a high-pass filter setting of 10 Hz (12 dB/octave), as compared with 5 Hz (12 dB/octave). No significant differences were found in the detectability rate of MLR between the two-filter band-pass settings. It is important to note that some MLR were unstable and not easily replicable. Therefore, the clinical application of these components is still doubtful.
使用两种宽带通滤波条件和2次/秒的慢刺激率，在25名新生儿中于60 dB nHL记录了听觉中潜伏期反应（MLR）。在两种类型的滤波器下，MLR均由一个初始正波、随后的一个负成分（Na）和一个正成分（Pa）组成。在新生儿中，这个正成分出现在45毫秒左右，并且比成人MLR的Pa持续时间更长。与5赫兹（12分贝/倍频程）的高通滤波器设置相比，在10赫兹（12分贝/倍频程）的高通滤波器设置下，仅平均500个信号后获得MLR的概率更高。在两个滤波带通设置之间，MLR的可检测率未发现显著差异。需要注意的是，一些MLR不稳定且不易重复。因此，这些成分的临床应用仍值得怀疑。
