Polak J F, Donaldson M C, Dobkin G R, Mannick J A, O'Leary D H
Department of Radiology, Harvard Medical School, Boston, MA.
AJR Am J Roentgenol. 1990 Apr;154(4):857-61. doi: 10.2214/ajr.154.4.2107689.
We propose a simple and rapid technique for the postoperative surveillance of developing stenosis in lower extremity saphenous vein arterial bypass grafts that uses color-assisted duplex sonography. Color Doppler flow images are used to identify points of altered flow dynamics. These points are subsequently analyzed by duplex sonography, with doubling of the peak systolic velocity at the point of suspected stenosis considered the diagnostic threshold for significant stenosis. A segment-by-segment comparison made with arteriography in 14 patients (15 grafts, 92 segments) showed this approach to be 95% sensitive (18/19) and 100% specific (73/73) for the detection and localization of focal graft stenoses that involve greater than 50% narrowing of the lumen diameter. We conclude that color-assisted duplex sonography can accurately detect the presence of saphenous vein arterial bypass graft stenoses.
我们提出一种简单快速的技术，用于对下肢大隐静脉动脉搭桥术后发生的狭窄进行监测，该技术采用彩色辅助双功超声检查。彩色多普勒血流图像用于识别血流动力学改变的部位。随后通过双功超声对这些部位进行分析，将疑似狭窄部位的收缩期峰值速度加倍视为显著狭窄的诊断阈值。对14例患者（15条移植物，92个节段）的动脉造影进行逐段比较，结果显示该方法对检测和定位管腔直径狭窄超过50%的局灶性移植物狭窄的敏感性为95%（18/19），特异性为100%（73/73）。我们得出结论，彩色辅助双功超声检查能够准确检测大隐静脉动脉搭桥移植物狭窄的存在。
