Rose S C, Zwiebel W J, Nelson B D, Priest D L, Knighton R A, Brown J W, Lawrence P F, Stults B M, Reading J C, Miller F J
Department of Radiology, University of Utah Medical Center, Salt Lake City 84132.
Radiology. 1990 Jun;175(3):639-44. doi: 10.1148/radiology.175.3.2188293.
Color duplex flow imaging (CDFI) permits pain- and risk-free direct imaging of the deep venous system of the lower extremities. To prospectively ascertain the accuracy and limitations of this technique, CDFI was performed in 75 lower limbs of 69 consecutive patients referred for venographic evaluation of clinically suspected lower extremity deep venous thrombosis (DVT). The CDFI study was obtained within 24 hours of the contrast venogram. Both studies were interpreted without knowledge of the patient's clinical findings or the results of the other test. Contrast venography was regarded as the standard for diagnosis of DVT. Accuracy was 99% for detection of DVT above the knee and 81% below the knee. Sonographic evaluation of the calf veins was technically adequate in 60% of limbs; accuracy was 98% in this group. In the 40% of limbs with technically limited CDFI studies of the calf, accuracy decreased to 57%. Although small nonocclusive thrombi occurred infrequently in this series of symptomatic patients, CDFI missed three of four such thrombi. It is concluded that CDFI, when not technically compromised, is sufficiently accurate to definitively diagnose symptomatic lower extremity DVT.
彩色双功血流成像（CDFI）能够对下肢深静脉系统进行无痛且无风险的直接成像。为前瞻性地确定该技术的准确性和局限性，对连续69例因临床怀疑下肢深静脉血栓形成（DVT）而转诊进行静脉造影评估的患者的75条下肢进行了CDFI检查。CDFI检查在造影剂静脉造影的24小时内完成。两项检查的解读均不知晓患者的临床发现或另一项检查的结果。造影剂静脉造影被视为DVT诊断的标准。膝上DVT检测的准确率为99%，膝下为81%。60%的肢体小腿静脉的超声检查技术上是充分的；该组准确率为98%。在40%小腿CDFI检查技术受限的肢体中，准确率降至57%。尽管在这组有症状的患者中，小的非闭塞性血栓很少见，但CDFI漏诊了四例此类血栓中的三例。结论是，当技术上没有问题时，CDFI对于明确诊断有症状的下肢DVT足够准确。
