Haire W D, Lynch T G, Lieberman R P, Lund G B, Edney J A
Department of Internal Medicine, University of Nebraska Medical Center, Omaha 68198-3330.
J Ultrasound Med. 1991 Sep;10(9):493-6. doi: 10.7863/jum.1991.10.9.493.
Asymptomatic thrombosis of the subclavian vein is common after placement of indwelling catheters. The sequelae of these thrombi are not known. Investigation is hampered by the requirement for venography for diagnosis; consequently, a noninvasive method of diagnosis would be welcome in this context. We have studied prospectively 32 subclavian catheters to determine the usefulness of duplex ultrasound in diagnosing asymptomatic thrombosis. Sixteen arm venograms were normal and all gave normal duplex scans. No false-positive scans were obtained. Eleven venograms demonstrated nonocclusive mural thrombi. Only three of these were seen with duplex ultrasound. Five totally occlusive thrombi were seen on venography, of which only two were detected with duplex sonography. The three thrombi not found with duplex ultrasound were short proximal venous occlusions. The insensitivity of this technique to asymptomatic subclavian thrombi limits its usefulness as a screening tool.
锁骨下静脉无症状性血栓形成在留置导管后很常见。这些血栓的后遗症尚不清楚。静脉造影诊断的要求阻碍了研究；因此，在这种情况下，一种非侵入性诊断方法将是受欢迎的。我们前瞻性地研究了32根锁骨下导管，以确定双功超声在诊断无症状性血栓形成中的作用。16例上肢静脉造影正常，所有双功扫描均正常。未获得假阳性扫描结果。11例静脉造影显示为非闭塞性壁血栓。其中只有3例在双功超声检查中被发现。静脉造影发现5例完全闭塞性血栓，其中双功超声仅检测到2例。双功超声未发现的3例血栓为近端静脉短段闭塞。该技术对无症状锁骨下血栓的不敏感性限制了其作为筛查工具的作用。
