DSA of 708 IPSs of 375 consecutive patients were retrospectively investigated to calculate the distance from the top of the JB to the IPS-IJV junction, and a simple classification system based on this distance was proposed.
The median distance from the top of the JB to the IPS-IJV junction was 20.8 ± 14.7 mm. Based on the lower (10.9 mm) and upper (31.1 mm) quartiles, IPS-IJV junction variants were: type I, 0-10 mm (22.3%); type II, 11-30 mm (45.8%); type III, > 31 mm (23.9%); and type IV, no connection to the IJV (8.0%). Bilateral distances showed a positive interrelationship, with a correlation coefficient of 0.86. The bilateral symmetry type (visualized IPSs bilaterally) according to our classification occurred in 267 of 300 (89.0%) patients.
In this study, the IPS-IJV junction was located far from the JB (types II and III), with a higher probability (69.6%). This distance and the four-type classification demonstrated high degrees of homology with the contralateral side. These results would be useful for identifying the non-visualized IPS orifice.
方法:对375例连续患者的708例IPSs的DSA进行回顾性调查,以计算从JB顶部到IPS-IJV交界处的距离,提出了一种基于该距离的简单分类系统。
结果:从JB顶部到IPS-IJV交界处的中值距离为20.8±14.7mm。基于下四分位数(10.9毫米)和上四分位数(31.1毫米),IPS-IJV连接变体为:I型,0-10mm(22.3%);II型,11-30毫米(45.8%);III型,>31毫米(23.9%);和IV型,与IJV没有联系(8.0%)。双边距离显示出积极的相互关系,相关系数为0.86。根据我们的分类,双侧对称类型(双侧可视化IPSs)发生在300例患者中的267例(89.0%)。
结论:在这项研究中,IPS-IJV交界处远离JB(II型和III型),概率更高(69.6%)。该距离和四型分类显示出与对侧的高度同源性。这些结果对于识别非可视化IPS孔口将是有用的。