Belkin M, Bucknam C A, Giuca J E, Horowitz L M
Arch Surg. 1985 Jul;120(7):809-11. doi: 10.1001/archsurg.1985.01390310047010.
To determine the relative merits of oculopneumoplethysmography (OPG) (Gee) and duplex scanning of the carotid arteries, a retrospective analysis was made of 93 patients in a 12-month period who underwent noninvasive carotid studies followed by carotid angiography. The results for the duplex scan were 91% sensitivity, 86% specificity, and 89% overall accuracy in evaluation of 184 arteries. The OPG results were 59% sensitivity, 90% specificity, and 74% accuracy when applied to individual arteries. The sensitivity of OPG increased to 77% when applied to disease in the patient rather than in individual arteries. Analysis of cases in which the duplex scan and OPG were in agreement and disagreement suggested an important role for the OPG test despite its inferior accuracy compared with the duplex scan alone. The predictive value of an abnormal duplex scan result was 98% when the OPG was also abnormal, whereas it was 81% when the OPG was normal. The predictive value of a normal duplex scan result was 93% when the OPG was also normal, whereas it was 60% in those cases where the OPG was abnormal. We believe that the duplex scan should be the basic noninvasive evaluation of cerebrovascular disease, although the OPG continues to provide important information.
为了确定眼体积描记法（OPG）（吉氏法）和颈动脉双功扫描的相对优点，我们对93例患者进行了回顾性分析，这些患者在12个月内接受了无创颈动脉检查，随后进行了颈动脉血管造影。双功扫描在评估184条动脉时的结果为：敏感性91%，特异性86%，总体准确率89%。当应用于单条动脉时，OPG的结果为：敏感性59%，特异性90%，准确率74%。当应用于患者的疾病而非单条动脉时，OPG的敏感性提高到77%。对双功扫描和OPG结果一致及不一致的病例分析表明，尽管OPG的准确性低于单独的双功扫描，但OPG检查仍具有重要作用。当OPG也异常时，双功扫描异常结果的预测价值为98%，而当OPG正常时，其预测价值为81%。当OPG也正常时，双功扫描正常结果的预测价值为93%，而在OPG异常的病例中，其预测价值为60%。我们认为，双功扫描应作为脑血管疾病的基本无创评估方法，尽管OPG仍能提供重要信息。
