CT血管成像对髂静脉受压综合征及继发血栓形成的诊断价值

目的 探讨CTA对髂静脉受压综合征(IVCS)及继发血栓形成的临床应用价值.方法 回顾性分析80例正常对照组和经DSA证实的31例IVCS患者的CTA资料,测量2组受压髂静脉的前后内径,计算受压程度,并采用t检验和Wilcoxon秩和检验进行比较.以DSA为诊断标准,统计IVCS的CTA诊断符合率.结果 对照组受压左髂总静脉前后内径女性组为(7.0±2.5)mm,小于男性组(8.1±2.5)mm;t值=2.42,P＜0.05);左髂总静脉受压程度男性组(0～61.36%,中位数为26.82%)与女性组(0～65.41%,中位数为28.75%)差异无统计学意义(Z=-0.59,P＞0.05).对照组受压左髂总静脉前后内径为(7.6±2.0)mm,受压程度为0～65.41%,中位数为27.65%;IVCS组受压髂静脉前后径为(2.7±1.1)mm,髂静脉的受压程度为55.18%～100.00%,中位数为76.12%,受压髂静脉前后内径小于对照组(t=12.78,P＜0.05),受压程度大于对照组(Z=-8.18,P＜0.05).31例IVCS中,左髂总静脉受压28例,右侧髂总静脉受压2例,另1例左右髂总静脉分别受到左右髂总动脉压迫.15例继发髂股静脉血栓形成,CTA诊断结果均与DSA结果相符合.结论 CTA能准确测量受压髂静脉前后内径并判断受压程度,CTA还能清楚显示IVCS的继发髂股静脉血栓形成,是诊断IVCS的有效方法.

The diagnostic value of CT angiography in iliac vein compression syndrome and secondary thrombosis

Objective To assess the value of multi-slice spiral CTA in the diagnosis of iliac vein compression syndrome(IVCS)and secondary thrombosis.Methods The CTA data of 80 controls and 31 patients with IVCS conformed by DSA were retrospectively studied.The inner diameters of the compressed iliac vein in two groups were measured and compression ratios were calculated.The data were compared using t test and Wilcoxon test.The findings of CTA were compared with that of DSA and the accuracy of CTA was analyzed.Results For the control group,the inner diameters of left iliac vein in female group(7.0±2.5)mm were significantly less than that in male group(8.1±2.5)mm(t=2.42,P＜0.05).For the control group,the inner diameters of left iliac vein was(7.6±2.0)mm,and the compression ratios were 0 to 65.41%(median 27.65%).The compression ratios were no statistical differences between male group(0 to 61.36%,median 26.82%)and female group(0 to 65.41%,median 28.75%)(Z=-0.59,P＞0.05).For the patients group,the inner diameters of compression iliac vein was(2.7±1.1)mm.The compression ratios were 55.18% to 100%(median 76.12%).Both inner diameters and compression ratios were statistically different between the control and patients group(t=12.78,P＜0.05;Z=-8.18,P＜0.05).Fifteen of 31 cases with IVCS were accompanied with deep vein thrombosis.The left iliac veins were compress in 28 cases,while right iliac veins were compressed in 2 cases.The left and right iliac common veins were compressed by the left and right jliac common arteries in one case.The results of CTA were consistent with that of DSA in all cases.Conclusions CTA can not only measure the inner diameters of iliae vein compression and calculate compression ratios,but also demonstrate secondary thrombosis clearly.CTA is an effective examination in diagnosis of IVCS and secondary thrombosis.