PDF(Pubmed)
Abstract：
The BIS value may decrease by cerebral hypoperfusion. We report a case in which the BIS value suddenly decreased during cervical spine surgery, which led us to find cervical screws compressing the vertebral arteries. In a 79-year-old man undergoing cervical spine surgery, the BIS suddenly decreased from about 40 to 10-20, about 4 h after the start of surgery. Intraoperative 3-dementional computed tomography indicated that both the two tips of cervical screws inserted in the 6th cervical vertebra were within bilateral transverse foramens. These cervical screws were removed, and the BIS increased immediately. The cervical screws were re-inserted again thorough the same vertebra into the bilateral transverse foramens, and the BIS decreased immediately. Postoperatively, cerebral hypoperfusion due to compression of bilateral vertebral arteries by two cervical screws was identified. The BIS may be a useful to detect cerebral hypoperfusion due to compression of the vertebral artery by a cervical screw.
摘要：
BIS值可能因脑灌注不足而降低。我们报告了一个病例，其中BIS值在颈椎手术期间突然下降，这导致我们发现颈椎螺钉压迫椎动脉。一名79岁的男子正在接受颈椎手术，手术开始后约4小时，BIS突然从约40降至10-20。术中3代计算机断层扫描显示，插入第6颈椎的颈椎螺钉的两个尖端都在双侧横向孔眼内。这些颈椎螺钉被移除，BIS立即增加。再次将颈椎螺钉穿过同一椎骨重新插入双侧横向孔，BIS立即下降。术后,确定了由于两个颈椎螺钉压迫双侧椎动脉而导致的脑灌注不足。BIS可用于检测由于颈椎螺钉压缩椎动脉而导致的脑灌注不足。
