微导管栓塞剂的类型

 普通栓塞剂 Conventional agents

 水溶性合成聚合物 Water-soluble synthetic polymer

 形态不规则 Irregular shape

 不均匀粒径分布 Inhomogeneous size distribution

 容易获得并价格低廉 Easily available and inexpensive

 自1975年，广泛用于各种适应症 Since 1975, widely used for various indications

颗粒本身并不能完全阻塞血管腔
Particles alone do not completely occlude vessel lumen

不规则形状的颗粒聚集并附着在血管壁-血流停滞
Irregular shaped particles aggregate and adhere to the vessel wall --- blood flow stagnation

在颗粒中血栓形成导致完全血管闭塞
Complete vessel occlusion by thrombus formation among particles

再通可能通过organized 的血栓发生

封闭水平与粒径无关 Occlusion level is not correlated with particle size

- 形状不规则导致的近端聚集 Proximal aggregation due to irregular shape

微导管注射过程中阻塞 Microcatheter occlusion during injection

不均匀粒径分布 Inhomogeneous size distribution

Pelage JP, et al. Radiology 2002;224:436–445