大学生听觉生理异常与听骨链HRCT扫描结果探讨

College Students' auditory ossicular chain abnormality and HRCT scan results

目的探讨不合理应用音视频终端对大学生听觉生理的影响及听骨链HRCT表现。方法自行设计问卷,对商丘医学高等专科学校2012级1 200名大学生进行调查,对发生耳鸣、听力下降的学生进行音叉试验、纯音测听、声导抗测试和听骨链HRCT扫描。结果 1纯音测听:71人中有119耳听力下降,且多数耳表现为AC低中频,BC 2 000 Hz下降明显;18耳ABG≥30 d B,11耳BC听力曲线图出现Carhart notch;2声导抗测试:55人中有53人鼓室导抗图为A型;3听骨链HRCT扫描显示,14人(鼓室导抗图均为A型)锤砧关节间隙变窄或融合,且听力下降耳与关节改变耳相对应。结论大学生因长期使用音视频终端所导致的听力下降可能与听骨链锤砧关节结构改变有关。

Objective To explore the influences of unreasonable application of audio and video terminal on the hearing physi-ology of college students and HRCT manifestations of ossicular chain.Methods By the use of self -designed questionnaire,a survey was conducted on 1 200 college students of the grade 2012 in Shangqiu Medical College,those who had tinnitus and hearing loss were examined in the tuning fork test,pure tone audiometry,tympanometry and ossicular chain HRCT scanning. Results ① The findings of pure tone audiometry showed that 1 19 ears of 71 students had hearing loss,most of which dis-played significantly decline in low and intermediate frequency of AC and /or high frequency （2 000 Hz）of BC;ABG of 18 ears≥30 dB,and BC hearing curve chart of 11 ears appeared Carhart notch;② The results of tympanometry indicated that the tympa-nograms of 53 subjects derived from 55 students displayed type A;③ The findings of HRCT scan of ossicular chain revealed that 14 people whose tympanograms showed type A had narrowed gap or fusion of hammer anvil joint and the ears suffering hearing loss were corresponding to the ears having joint changes.Conclusion Hearing decline of college students by reason of long -term use of audio and video terminals may be related to the structure changes in hammer anvil joint of ossicular chain.