Abstract：
The inferior petrosal sinus (IPS) is the transvenous access route for neurointerventional surgery that is occasionally undetectable on digital subtraction angiography (DSA) because of blockage by a clot or collapse. This study was aimed at analyzing the distance from the jugular bulb (JB) to the IPS-internal jugular vein (IJV) junction and proposing a new anatomical classification system for the IPS-IJV junction to identify the non-visualized IPS orifice.
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.
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.
摘要：
背景：岩下窦（IPS）是神经介入手术的经静脉入路，在数字减影血管造影术（DSA）中由于凝块或塌陷而偶尔无法检测到。本研究旨在分析从颈静脉球（JB）到IPS-颈内静脉（IJV）交界处的距离，并提出一种新的IPS-IJV交界处解剖分类系统，以识别非可视化的IPS孔口。
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。
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。
