模式翻转视觉诱发电位和眶部CT检查在外伤性视神经病变中的应用价值

摘要

Objective:To study the applied value of pattenrn reverversal evoked potential(PRVEP) and orbital CT examination in patients with traumatic optic neuropathy(TON) .Methods:55 patients with TON causedby one‐eye injury from April to Octomber 2013 in the ophthalmology wards of our hospital were selected as subjects .PRVEP and orbital CT examinations were conducted and then analyzed compar‐atively .Results:55 cases with PRVEP in injured eyes were abnormal ,the rate being 100% ,of which 25 (45% )were mild ,19(35% )were moderate and 11(20% )were serious .41 orbital CT results were abnor‐mal ,the rate being 75% ,including 23 mild cases(41 .8% ) ,12 moderate(21 .8% ) ,and 6 severe(11% ) . Amplitudes of P100 in traumatic eyes were significantly lower than normal eyes(P<0 .01) ,and the latent periods were significantly prolonged(P<0 .01) .Conclusion:PRVEPs and orbital CT examinations are ob‐jective and non‐invasive.For the facial trauma with blurred vision .voutine examinations should be carried out in order to diagnose TONSO avoid as mis‐diagnosis .%目的：探讨模式翻转视觉诱发电位（PRVEP）和眶部CT检查在外伤性视神经病变（TON）中的应用价值。方法：选择55例我院眼科病房2013年4～10月期间单眼外伤合并视神经病变的患者进行PRVEP和眶部CT检查，统计两项检查的异常结果情况，并比较外伤患者眼与正常眼的PRVEP结果。结果：TON患者的PRVEP结果异常者55例（占100％），其中轻度25例（占45％），中度19例（占35％），重度11例（占20％）。TON患者PRVEP的外伤眼的眶部CT结果异常者为41例，异常率为75％，其中轻度23例（占42％），中度12例（占22％），重度6例（占11％）。外伤眼P100波幅较正常眼明显降低（P＜0．01），潜伏期明显延长（P＜0．01）。结论：PRVEP和眶部CT检查具有客观、无创性的优点，对于头面部外伤尤其是存在视物不清的患者应常规进行检查，有助于外伤性视神经病变的早期诊断，避免漏诊。