The subdural space plays a major role in venous blood drainage in the brain.

硬膜下隙在大脑静脉回流中起重要作用。

So the main cause of a subdural hemorrhage is a rupture of the bridging veins located in the subdural space.

硬膜下出血的主要原因就是硬膜下隙中的桥静脉破裂。

The internal layer of the dura mater lies above the arachnoid mater and the two are separated by the subdural space.

硬脑膜的内层在蛛网膜之上，这两层中间的腔隙叫做硬膜下隙。

Regardless of the mechanism, once a bridging vein is torn, the blood pools in the subdural space and creates a hematoma.

无论何种机制，一旦桥静脉破裂，血液就会积聚在硬膜下隙形成血肿。

These veins travel through the arachnoid mater, pass through the subdural space and penetrate the inner layer of the dura mater to drain into the dural venous sinuses located between the two layers of the dura mater.

这些静脉穿过蛛网膜，经过硬膜下隙，穿过硬脑膜内层，使血液回流至两层硬脑膜中间的静脉窦中。