Kellner U, Foerster M H
Augenklinik, Universitätsklinikum Benjamin Franklin, Freie Universität Berlin, Germany.
Ger J Ophthalmol. 1996 Jan;5(1):23-5.
The examination of visual evoked cortical potentials (VECPs) prior to vitrectomy has been proposed for selection of patients with good chances for a favorable outcome following surgery. A missing single flash VECP has been considered a contraindication for further surgical treatment. A 64-year-old woman with proliferative diabetic retinopathy suffered from an intensive vitreous hemorrhage in one eye. Preoperatively, the flash VECP was nonrecordable. Intraoperatively, a dense vitreous hemorrhage and retrohyaloidal blood was found. The retina was attached. Postoperatively, the flash VECP was similar in both eyes with normal latencies. The visual acuity improved from light perception to 0.05. Severe vitreous hemorrhage may interfere with preoperative VECP recordings. A nonrecordable VECP has to be judged cautiously so as to prevent false-negative responses in eyes that could regain vision following vitrectomy and removal of the hemorrhage.
有人提出在玻璃体切除术之前检查视觉诱发电位（VECP），以筛选手术预后良好可能性大的患者。缺失单次闪光VECP被视为进一步手术治疗的禁忌症。一名64岁患有增殖性糖尿病视网膜病变的女性，一只眼睛发生严重玻璃体积血。术前，闪光VECP无法记录。术中，发现浓密的玻璃体积血和玻璃体后出血。视网膜是附着的。术后，双眼闪光VECP相似，潜伏期正常。视力从光感提高到了0.05。严重玻璃体积血可能会干扰术前VECP记录。对于无法记录的VECP必须谨慎判断，以防止在玻璃体切除和清除出血后可能恢复视力的眼睛出现假阴性反应。
