上矢状窦旁桥静脉注入口的显微解剖学观察及其意义

目的通过显微解剖观察上矢状窦旁桥静脉注入口的形态特点,为脑静脉血栓形成发病机理的解释提供形态学依据。方法 30例(60侧)成人头颅湿性标本,观测记录注入口的数目、分布、类型及走行。结果上矢状窦旁桥静脉共有注入外口367个(桥静脉与硬脑膜连接处,位于上矢状窦腔外),注入内口(桥静脉在上矢状窦腔内的开口)375个,其中有8个注入外口分别对应两个注入内口。注入口集中分布在上矢状窦前段和后段,分直接注入和间接注入(注入外口经脑膜静脉或硬膜旁窦走行一段距离后到达注入内口)两种类型。37%的上矢状窦后段注入口为间接注入,其中85%使得桥静脉由逆行注入上矢状窦变为垂直或顺行注入。结论上矢状窦旁桥静脉注入口复杂多样,且常使桥静脉逆行、垂直和顺行注入上矢状窦内的方式发生改变,在一定程度上可以对抗脑静脉血栓形成的发生。

Microanatomy of the orifice of cerebral bridging veins into the suprior sagittal sinus

Objective To perform a microanatomy of the orifice of cerebral bridging veins (BVs)into the superior sagittal sinus (SSS),in orderto provide a morphologic basis forthe mechanism of cerebral venous thrombosis. Methods Thirty cadaveric head specimens were used in this study. The number,location,types and distribution of the orifice were recorded. Results A total of 367 outer orifices and 375 inner orifices were found. The outer orifice was the junction outside of the SSS between BV and dural mater. The inner ...