Salles-Cunha S X, Bernhard V M, Imray T J
Med Instrum. 1978 Mar-Apr;12(2):117-21.
The accuracy of Doppler ultrasound and impedance diagnostic techniques for identifying deep venous thrombosis was determined by comparison with patient venograms. Those patients suspected of having deep venous thrombosis were tested by ultrasound, impedance, and venography, with venography the standard for establishing the accuracy of the noninvasive methods. The deep inspiration, the Valsalva and abdominal pressure maneuvers, and the pneumatic cuff technique were employed with the impedance tests. The incidence of false negative and false positive results were determined for each noninvasive method separately and for both methods used concurrently. When both methods were considered, the number of false positives was high; however, all cases with major thrombosis were detected in the group of patients examined. A positive result with ultrasound or impedance tests should be considered an indication to perform venography, or if venography is contraindicated, to perform other noninvasive tests.
通过与患者静脉造影进行比较，确定了多普勒超声和阻抗诊断技术在识别深静脉血栓形成方面的准确性。那些疑似患有深静脉血栓形成的患者接受了超声、阻抗和静脉造影检查，其中静脉造影是确定非侵入性方法准确性的标准。在进行阻抗测试时采用了深吸气、瓦尔萨尔瓦动作和腹部加压动作以及气袖技术。分别确定了每种非侵入性方法以及同时使用两种方法时假阴性和假阳性结果的发生率。当同时考虑两种方法时，假阳性数量较高；然而，在接受检查的患者组中，所有主要血栓形成病例均被检测到。超声或阻抗测试的阳性结果应被视为进行静脉造影的指征，或者如果静脉造影禁忌，则应进行其他非侵入性检查。
