Type I Low-flow pelvic varicocele 低速盆腔静脉曲张
a. Non-cross-pelvic. 非跨越盆腔
b. Cross-pelvic. 跨越盆腔
Type II High-flow pelvic varicocele 高速盆腔静脉曲张 a. Non-cross-pelvic (high-outflow through the ipsilateral hypogastric vein). 非跨越盆腔（通过同侧的髂静脉） 
b. Cross-pelvic varicocele 跨越盆腔静脉曲张
1. High-outflow through the contralateral hypogastric vein. 通过对侧髂内静脉的高血流
2. High-outflow through both hypogastric veins. 双侧髂内静脉高血流
3. High-outflow through the contralateral ovarian vein. 通过对侧卵巢静脉高血流
4. High-outflow through all of the above veins. 通过以上所有静脉的高血流
什么是高流速？目前没有客观标准，这就像AVM，没有客观标准。高流速给静脉硬化带来一定的困难，主要是硬化剂的逸出。技术上需要阻断逸出的路径，用球囊的方法只是其中之一。
“Clearly, the fewer the veins to be treated…the lower the radiation dose.”
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