Editor-Postoperative visual loss (PVL) after non-ocular surgery is rare, but a devastating complication.1"3 We report a patient with unexpected PVL after brain tumour removal by frontal craniotomy. The development of PVL was attributed to the bispectral index (BIS) sensor (BIS standard, Aspect Medical Systems) fixed on the forehead. A 38-yr-old female patient was undergoing right frontal brain tumour removal. She had complained of headache and nausea suggesting increased intracranial pressure, but otherwise she was quite healthy.
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机译：非眼科手术后极少发生编辑后的视力丧失（PVL），但具有破坏性的并发症。1“ 3我们报道一名患者额叶开颅手术切除脑肿瘤后出现意外的PVL。PVL的发展归因于双光谱指数（ BIS）传感器（BIS标准，Aspect Medical Systems）固定在前额上，一名38岁的女性患者正在接受右额脑肿瘤切除术，她主诉头痛和恶心，提示颅内压增高，但她很健康。
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