正常成人下腔静脉的CT测量
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CT measurement of inferior vena cava in normal adults
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    摘要:

    目的:测量100例正常成人下腔静脉(IVC)的各条径线及其位置,并探讨其临床应用意义-方法:分别测量右心房水平及第一肝门水平下腔静脉,并计算长短径的比值-在第一肝门水平的层面上,沿椎体的前缘做一水平线作为X轴,并紧贴该椎体右缘做与X轴垂直的Y轴,分别测量IVC中心距离X-Y轴的长度及IVC长轴与X轴角度-所有数据经统计学处理-结果:在右心房水平,IVC的短径无显著的年龄和性别差异(P > 0.05),各性别-年龄组95%上限均<30 mm-IVC长径存在显著的性别和年龄差异(P < 0.05)-第一肝门水平,IVC短径无年龄差异(P > 0.05),但存在性别差异(P < 0.05),但两者95%上限均<22 mm;而IVC长径以及IVC长径/短径不仅存在年龄差异,还存在性别差异(P < 0.05)-IVC至X-Y轴距离无显著的年龄和性别差异(P > 0.05),各性别-年龄组95%上限均<2.5 cm和<1.0 cm-IVC长轴与X轴的夹角为31°±5°,无显著的年龄差异(P > 0.05),但存在性别差异(P < 0.05),但两者95%上限均<60°-结论:右心房水平IVC短径是判断IVC增粗与否的敏感指标-CT可确定第一肝门水平正常IVC的位置及与X轴的夹角范围,为肝肾间隙病变对IVC推移的判断提供诊断参考-

    Abstract:

    Objective:To investigate diameters and location of inferior vena cava in 100 normal adults by CT,and evaluate its the values on clinical application. Methods:The maximum and minimum diameters of inferior vena cava of 100 normal adults were measured. The distance from the X-axis(in first liver hilar level,along foreside of vertebra drawing a horizontal) or Y-axis(along starboard of vertebra drawing a perpendicular) to inferior vena cava was measured. The angle between the maximum diameter of inferior vena cava and the X-axis was measured also. All datum were dealed with statistics. Results:At the level of right atrium,the minimum diameters of IVC was relative invariablenes according to age and gender(P > 0.05). The upper limits of 95% cases were less than 3.0 cm in different groups disparted on age and gender. The maximum diameters of IVC and the ratio of the maximum and minimum diameters were variable in different groups(P < 0.05). At the level of the first liver hilar,the minimum diameters of IVC didn’t change with age(P > 0.05),but changed with the genders(P < 0.05). But the upper limits of 95% were less than 22 mm. Moreover the maximum diameters of IVC and the ratio of the maximum and minimum diameters were variable in different groups disparted on age and gender(P < 0.05). The distances from the X-axis and Y-axis to inferior vena cava had no changes in the different groups on age or gender(P > 0.05). The upper limits of 95% were less than 2.5 cm and 1.0 cm,respectirely. The angle between the maximum diameter of inferior vena cava and the X-axis was 31°±5°,without diffences in groups divided by age(P > 0.05),but changed with gender(P < 0.05). But the upper limits of 95% were less than 60°. Conclusion:The minimum diameter of IVC can be taken as a sensitive indexe to evaluate the size of IVC. The range of the location of normal IVC and the angle conseructed with the X-axis were ascertainable in CT. It can offer reference for judgement of the change of IVC’s location induced by hepaorenal recess disease.

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王 东,张追阳,胡春洪.正常成人下腔静脉的CT测量[J].南京医科大学学报(自然科学版),2009,29(7):1017-1021

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