Maruta Elaine Colombo Sousa, Azevedo Marisa Frasson de
Universidade Federal de São Paulo - UNIFESP - São Paulo (SP), Brasil.
Codas. 2020 Nov 27;32(6):e20190057. doi: 10.1590/2317-1782/20202019057. eCollection 2020.
to determine the functioning of the efferent auditory system in premature newborns with intraventricular hemorrhage.
the sample consisted of 44 newborns, divided into two groups. The study group was composed of 22 premature newborns with intraventricular hemorrhage/and the control group was composed of 22 newborns without intraventricular hemorrhage, matched to the study group for gestational age, correct gestational age and sex. The groups were submitted to the evaluation of the inhibitory effect of auditory efferent in otoacoustic emissions (equipment ILOv6-Otodynamics Ltda®) and auditory evoked potential with and without contralateral noise (equipment SmartEP-Intelligent Hearing Systems®).
newborns with intraventricular hemorrhage exhibited a higher occurrence of central hearing alteration as well as a lesser occurrence of the inhibitory effect of auditory efferent in otoacoustic emissions and auditory evoked potential compared to the newborns without this condition. An association was found between central hearing alteration and a lower occurrence of inhibitory effect. Agreement was found between the inhibitory effect test on otoacoustic emissions and latency of the auditory evoked potential.
premature newborns with intraventricular hemorrhage have a greater occurrence of functional abnormality of the afferent auditory system, which can be effectively identified through an evaluation of the inhibitory effect of auditory efferent in otoacoustic emissions evoked by a transient stimulus and latency parameter in the brainstem auditory evoked potential.
确定患有脑室内出血的早产新生儿传出听觉系统的功能。
样本包括44名新生儿，分为两组。研究组由22名患有脑室内出血的早产新生儿组成，对照组由22名无脑室内出血的新生儿组成，两组在胎龄、矫正胎龄和性别方面相匹配。对两组进行耳声发射中听觉传出抑制效应的评估（使用ILOv6型设备 - Otodynamics Ltda公司生产）以及在有和无对侧噪声情况下的听觉诱发电位评估（使用SmartEP型设备 - Intelligent Hearing Systems公司生产）。
与未患此病的新生儿相比，患有脑室内出血的新生儿出现中枢听觉改变的发生率更高，耳声发射和听觉诱发电位中听觉传出抑制效应的发生率更低。发现中枢听觉改变与较低的抑制效应发生率之间存在关联。耳声发射抑制效应测试与听觉诱发电位潜伏期之间存在一致性。
患有脑室内出血的早产新生儿传入听觉系统功能异常的发生率更高，通过评估瞬态刺激诱发的耳声发射中听觉传出抑制效应以及脑干听觉诱发电位中的潜伏期参数，可以有效识别这种异常。
