Strik F
Department of Neurology, Hospital HdK, Oldenzaal, The Netherlands.
Clin Neurol Neurosurg. 1988;90(3):227-33. doi: 10.1016/0303-8467(88)90026-1.
The results of the combination of CW-Doppler ultrasonography and OPG-Gee are described in 68 patients. The Doppler examination had a sensitivity of 92% and a specificity of 89%, the percentages for the OPG-Gee were 69 en 79. The combination of the Doppler examination with the OPG-Gee improves our positive predictive value from 83 to 94%, the negative predictive value from 95 to 98% in concordant results. OPG-Gee fails especially in low-graded (50-74%) stenoses. Since there is no correlation between the degree of the stenosis and the pathophysiological changes of the cerebral circulation, OPG-Gee is of complementary value for the evaluation of the hemodynamic significance of a stenosis, established with the Doppler method.
本文描述了68例患者经连续波多普勒超声检查（CW-Doppler ultrasonography）与OPG-Gee联合检查的结果。多普勒检查的敏感度为92%，特异度为89%；OPG-Gee的相应百分比分别为69%和79%。多普勒检查与OPG-Gee联合应用时，结果一致时阳性预测值从83%提高到94%，阴性预测值从95%提高到98%。OPG-Gee尤其在低度狭窄（50%-74%）时判断失败。由于狭窄程度与脑循环的病理生理变化之间不存在相关性，OPG-Gee对于评估经多普勒方法确定的狭窄的血流动力学意义具有补充价值。
