Jha Indira, Alam Md Kabir, Kumar Chandan, Sinha Niska, Kumar Tarun
Department of Physiology, IGIMS, Patna, Bihar, India.
Department of Psychiatry, IGIMS, Patna, Bihar, India.
Ann Afr Med. 2024 Oct 1;23(4):684-687. doi: 10.4103/aam.aam_93_24. Epub 2024 Sep 14.
In past 20 years, there is increase in mobile phone users from 12.4 million to about 5.6 billion i.e 70 % of the world's population.[1] Electromagnetic radiations emitted from mobile phone damages inner ear, cochlea and outer hair cells of inner ear and auditory pathway (AP).[2].
Case control study. Group 1, N=30 subjects, using mobile smart phones since past 1-5 years and exposure time more than 2 hours per day. Group II included 30 subjects, using mobile smart phones for more than 5 years and exposure time more than 2 hours per day. Headache, tinnitus, or sensations of burning around phone-using were excluded. Brainstem auditory evoked potential (BAEP) done. Student Unpaired t test was used for analysis and chisquare test.
Mean ± SD of absolute latencies (AL) of Brainstem evoked response auditory. (BERA) waves III, V and all interpeak latencies at 80 dB and 4,6,8 KHz in group 2 were delayed and significant as compared to group 1. All parameters were highly significant at 8KHz as compared to 4KHz in group 2.
Brain stem evoked response audiometry (BERA) detects hearing loss in smart mobile phone using subjects at higher frequencies i.e at 8 KHz early. Hence central neural axis involvement can be detected early by BERA.
在过去20年中，手机用户从1240万增加到约56亿，即占世界人口的70%。[1]手机发出的电磁辐射会损害内耳、耳蜗以及内耳的外毛细胞和听觉通路（AP）。[2]
病例对照研究。第一组，N = 30名受试者，在过去1至5年使用智能手机，每天使用时间超过2小时。第二组包括30名受试者，使用智能手机超过5年，每天使用时间超过2小时。排除有头痛、耳鸣或使用手机周围有烧灼感的受试者。进行脑干听觉诱发电位（BAEP）检测。采用学生非配对t检验进行分析和卡方检验。
与第一组相比，第二组在80分贝以及4、6、8千赫兹时脑干诱发反应听觉（BERA）波III、V的绝对潜伏期（AL）均值±标准差以及所有峰间潜伏期均延迟且具有显著性。与4千赫兹相比，第二组在8千赫兹时所有参数均具有高度显著性。
脑干诱发反应听力测定（BERA）能早期检测出使用智能手机的受试者在较高频率即8千赫兹时的听力损失。因此，通过BERA可早期检测出中枢神经轴受累情况。
