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    应用ROC曲线分析彩色多普勒超声诊断胡桃夹综合征的价值

    Evaluation of color Doppler ultrasonography in diagnosis of nutcracker syndrome by receiver operating characteristic curves

      摘要
    • 摘要: 目的:用受试者工作特征(receiver operating characteristic,ROC)曲线评价彩色多普勒超声诊断胡桃夹综合征(mutcracker syndrome,NCS)的价值。方法:43例NCS患者和23名对照者平卧位分别于肠系膜上动脉(SMA)与腹主动脉(AA)夹角处和AA左侧测量左肾静脉(LRV)内径、血流峰值速度,背部后伸位15 min后重复测量上述指标。以临床诊断结果为"金标准",绘制彩色多普勒超声参数的ROC曲线,并计算曲线下面积(AUC)和最佳诊断分界值。结果:NCS患者SMA与AA夹角处LRV明显偏细,AA左侧LRV明显扩张,平卧位两者内径之比(D2/D1)、峰值流速之比(V1/V2)与对照组比较差异均有统计学意义(P<0.05);背部后伸位患病组上述改变更加明显。D2/D1与V1/V2ROC AUC积分别为0.966、0.969,临床诊断界值分别为3.1和4.3。结论:彩色多普勒超声对NCS的诊断具有一定的临床应用价值。

       

      Abstract: Objective: To evaluate the diagnostic value of color Doppler uhrasonography (CDUS) in nutcracker syndrome by receiver operating characteristic curve (ROC curve).Methods: The left renal vein (LRV) was measured on horizontal decubitus in 43 patients and 23 control subjects by CDUS.The interior diameter (D1) and flow velocit (V1) of LRV between superior mesenteric artery (SMA) and abdominal artery (AA),the interior diameter (D2) and flow velocit (V2) of LRV near the left of AA were recorded and analyzed in order to diferentiate nutcracker syndrome and controls.Repeated measuring the parameters above after 15 minutes keeping back after the extension bit.ROC curve of CDUS diagnosing nutcracker syndrome were drawn.The areas under curves (AUC) and diagnosis cut-off points of parameters in nutcracker syndrome were calculated.Results: D2/D1 and V1/V2 in patients with nutcracker syndrome were higher significantly than those in normal control subjects (P<0.05),the AUC of D2/D1 and V1/V2 were 0.966 and 0.969,respectively.The diagnosis cut-off point of D2/D1 and V1/V2 was 3.1 and 4.3,respectively.Conclusions: CDUS is an effective diagnosis method for nutcracker syndrome.

       

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