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目的 :研究早期怀疑脑干腔梗 (或小片状梗死 )患者的脑干听觉诱发电位 ( BAEP)变化。方法 :对 2 0例临床以椎一基底动脉缺血为主患者进行 BAEP检查并以 2 0例正常人做对照。结果 :早期怀疑脑干腔梗 (或小片状梗死 )患者中 ,1 3例 BAEP异常 (占 65% ) ,其中 6例经 CT证实为脑干小片状梗死 ,6例经 MRI证实为脑干腔梗 ,这些腔梗和小片状梗死多涉及桥脑被盖侧方 ,1例 MRI未见异常 ,7例 BAEP均属正常范围 (占 35% ) ,其中 CT示桥脑小片状梗死者 3例 ,MRI示桥脑腔梗者 3例 ,这些脑干腔梗和小片状梗死多接近中线部 ,MRI正常者 1例。结论 :BAEP图形的异常改变 ,是脑干梗死患者早期变化的一个指征 ,而正常 BAEP不能排除脑干腔梗或小片状梗死。
Objective: To study the changes of brainstem auditory evoked potential (BAEP) in patients with early suspected brainstem infarction (or small infarction). Methods: Twenty cases of patients with vertebrobasilar ischemia were evaluated by BAEP and 20 normal controls. Results: Thirty-three cases of abnormal BAEP (65%) were suspected early in the diagnosis of brainstem infarcts (or small infarcts), of which 6 were confirmed as small brainstem infarcts by CT and 6 by MRI Dry stalk, these infarcts and small pieces of infarction involving the pons were covered lateral, 1 case of MRI showed no abnormalities, 7 cases of BAEP are within the normal range (35%), CT showed pontine infarction In 3 cases, MRI showed 3 cases of cerebral pituitary infarction, these brain stem and parietal infarcts and more near the midline, normal MRI in 1 case. CONCLUSIONS: Abnormal changes in BAEP patterns are an indication of early changes in brainstem infarction patients, whereas normal BAEP can not rule out brachiocephalic or small infarcts.