Ward P E, Bradley F B, Brown J G, Kernohan W G, McGivern R C, Mollan R A
Queen's University of Belfast, Department of Orthopaedic Surgery, Musgrave Park Hospital, Northern Ireland.
Clin Orthop Relat Res. 1989 Nov(248):195-9.
Impedance plethysmography (IPG) is a useful noninvasive detection of proximal segment thrombosis. Seven hundred patients treated with total hip arthroplasty were examined preoperatively and several times postoperatively using this technique. Twenty-one abnormal IPG results were obtained, and venography confirmed that 12 of these patients had proximal segment thrombi and five had evidence of calf thrombi. Four venograms were completely clear, demonstrating a false-positive rate of 1.3% (including calf thrombi). Six patients with normal IPG results had calf thrombi. All positive venograms indicating a thrombus in the proximal venous segment were indicated with a positive IPG result, giving a sensitivity of 100%. The standardization of the procedure involving constant leg elevation has assisted in the accuracy of this screening system.
阻抗体积描记法（IPG）是一种用于检测近端节段血栓形成的有用的非侵入性方法。对700例行全髋关节置换术的患者在术前及术后多次使用该技术进行检查。获得了21个异常的IPG结果，静脉造影证实其中12例患者有近端节段血栓，5例有小腿血栓的证据。4份静脉造影片完全正常，显示假阳性率为1.3%（包括小腿血栓）。6例IPG结果正常的患者有小腿血栓。所有显示近端静脉节段有血栓的阳性静脉造影片均伴有阳性IPG结果，敏感性为100%。包括持续抬高腿部在内的操作标准化有助于提高该筛查系统的准确性。
