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轻微头外伤(minor head trauma,MHT)缺乏神经系统体征,诊断主要依靠病史,如有短暂意识丧失(不超过2小时)伴逆行性遗忘(不超过24小时)诊断即可成立。有时可有头痛、恶心呕吐等症状。作者对15例 MHT 和35例健康人进行脑干听觉诱发电位(BAEP)测试。首次测试在伤后24小时内,10例 MHT 于2个月后复测。测试除用常规的重复刺激速率为10次/秒的短声外,还用加速刺激速率(incrcasedstimulus rate,ISR)为55次/秒的短声。分别分次计算两种刺激速率测试的波间(Ⅴ～Ⅰ,Ⅴ～Ⅲ,Ⅲ～Ⅰ)潜伏期差值及加速刺激速率之纯净效果(以加速刺激速率测试的波间潜伏
Mild head trauma (MHT) lacks neurological signs. The diagnosis depends primarily on medical history, and may be diagnosed with brief loss of consciousness (no more than 2 hours) with retrograde amnesia (no more than 24 hours). Sometimes there may be headache, nausea and vomiting and other symptoms. The authors tested brainstem auditory evoked potentials (BAEP) in 15 MHT patients and 35 healthy individuals. The first test within 24 hours after injury, 10 cases of MHT retest after 2 months. The test was performed using a short sound with an incredased stimulation rate (ISR) of 55 beats / second in addition to the conventional short-beating rate of 10 beats / second. The difference of latency (Ⅴ ~ Ⅰ, Ⅴ ~ Ⅲ, Ⅲ ~ Ⅰ) and the pure effect of accelerating stimulation rate (Ⅴ ~ Ⅰ, Ⅴ ~ Ⅲ, Ⅲ ~ Ⅰ)