Munjal Sanjay Kumar, Panda Naresh K, Pathak Ashis
Department of Otolaryngology, Head and Neck Surgery, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Brain Inj. 2010;24(3):525-32. doi: 10.3109/02699050903516872.
To find out the relationship between severity of traumatic brain injury (TBI) and extent of auditory dysfunction.
Most of the studies have taken the subjects with TBI as one group without taking into account the extent of head injury viz. mild, moderate and severe. Combining all the three groups has resulted in presenting an incomplete picture of auditory deficits following TBI.
The sample population consisted of 290 subjects with TBI (study group) and 50 otologically normal subjects as controls. The subjects in the study group were further sub-divided into mild (n = 150), moderate (n = 100) and severe (n = 40) TBI. The audiological assessment consisted of pure tone audiometry, speech audiometry, tympanometry, acoustic reflex testing, auditory brainstem response and middle latency response audiometry.
An association was observed between the extent of auditory dysfunction and severity of TBI. This association was more pronounced for hearing status at high frequencies and ABR/MLR components. ABR Wave V absolute latency and I-V interpeak latency increased with severity of TBI. Amplitude of MLR wave Na and Pa decreased with increasing severity. It is suggested that subjects should be evaluated for hearing difficulties based on their severity of TBI.
探究创伤性脑损伤（TBI）的严重程度与听觉功能障碍程度之间的关系。
大多数研究将TBI患者作为一个整体，而未考虑头部损伤的程度，即轻度、中度和重度。将这三组患者合并在一起，导致呈现出TBI后听觉缺陷的不完整情况。
样本包括290例TBI患者（研究组）和50例听力正常的受试者作为对照组。研究组的受试者进一步细分为轻度TBI（n = 150）、中度TBI（n = 100）和重度TBI（n = 40）。听力学评估包括纯音听力测试、言语听力测试、鼓室图、声反射测试、听觉脑干反应和中潜伏期反应听力测试。
观察到听觉功能障碍程度与TBI严重程度之间存在关联。这种关联在高频听力状态和ABR/MLR成分方面更为明显。ABR波V绝对潜伏期和I-V峰间潜伏期随TBI严重程度增加而增加。MLR波Na和Pa的振幅随严重程度增加而降低。建议根据TBI的严重程度对受试者进行听力困难评估。
