Lee T H, Ryu S J, Chen S T, Tseng K J
Department of Neurology, Chang Gung Memorial Hospital, Taipei, Taiwan, R.O.C.
J Formos Med Assoc. 1992 Jun;91(6):575-9.
To determine the diagnostic accuracy of extracranial internal carotid artery (ICA) occlusion by carotid duplex sonography and ophthalmic flow direction, we compared both carotid sonograms and angiograms in 82 cases of ischemic cerebrovascular disease. A total of 157 carotid arteries were available for comparison. The overall diagnostic accuracy of ICA occlusion by duplex scanning was 96% (sensitivity, 83%; specificity, 98%; positive predictive value, 91%), by ophthalmic flow examination, 95% (sensitivity, 79%; specificity, 98%; positive predictive value 86%), and by combined study, 98% (sensitivity, 96%; specificity, 98%; positive predictive value 92%). We recommend that the ophthalmic flow examination should be used in combination with other sonographic methods in detecting extracranial carotid artery disease. The combined study gives higher diagnostic accuracy than the single method. When an occlusion or a tight stenosis is uncertain on carotid sonograms, color Doppler or angiography is indicated for further confirmation.
为了通过颈动脉双功超声和眼血流方向来确定颅外颈内动脉（ICA）闭塞的诊断准确性，我们对82例缺血性脑血管疾病患者的颈动脉超声图像和血管造影进行了比较。共有157条颈动脉可供比较。双功扫描诊断ICA闭塞的总体准确性为96%（敏感性83%；特异性98%；阳性预测值91%），眼血流检查为95%（敏感性79%；特异性98%；阳性预测值86%），联合检查为98%（敏感性96%；特异性98%；阳性预测值92%）。我们建议在检测颅外颈动脉疾病时，眼血流检查应与其他超声方法联合使用。联合检查比单一方法具有更高的诊断准确性。当颈动脉超声图像上的闭塞或严重狭窄不确定时，应进行彩色多普勒或血管造影以进一步确认。
