So an acute subdural hematoma causes symptoms within 2 days.

急性硬膜下血肿通常在2天内出现症状。

Subdural hematomas can also happen after an acceleration-deceleration injury like speeding on the road and then suddenly slamming on the brakes.

硬膜下血肿也常发生于加速-减速损伤中，比如在加速行驶后突然急刹时。

A subacute subdural hematoma causes symptoms between 3 and 14 days, and a chronic subdural hematoma causes symptoms after 15 days.

亚急性硬膜下血肿在3到14天内出现症状；慢性硬膜下出血在15天后出现症状。

Small subdural hematomas are drained by placing a small tube called a catheter through a drilled hole in the skull.

小型的硬膜下血肿可经由颅脑钻孔，通过导管引流治疗。

So on a CT scan, subdural hematomas follow the contour of the brain and form a crescent shape and cross suture lines.

所以在CT上，硬膜下血肿的轮廓和大脑轮廓一致，呈新月形，跨过颅缝。

A blow to the head? A subdural hematoma?

头部受到过袭击? 硬脑膜下血肿?

A chronic subdural hematoma, on the other hand, shows up as a hypodense mass, which is less white than the surrounding brain tissue.

而慢性硬脑膜下血肿，则显示为低密度区域，意味着比正常脑组织亮度更低。

He has a subdural hematoma, which is bleeding in the brain.

他硬膜下血肿 导致脑部出血。

Large subdural hematomas require a craniotomy, which is when part of the skull bone is removed in order to remove the accumulated blood below.

大型的硬膜下血肿则需要开颅手术，即取下部分颅骨，来清除积聚的血液。

On a CT scan, an acute subdural hematoma shows up as a hyperdense mass, meaning that it looks more white than the surrounding healthy brain tissue.

在CT上，急性硬膜下血肿为高密度区域：也就是说那块区域比旁边的正常脑组织亮度更高。

A large subdural hematoma on one side of the skull can cause a midline shift, which is the displacement of the whole brain toward the opposite side of the skull.

大量的单侧硬膜下血肿会造成中线移位，即整个大脑都向另一侧偏移。

Subdural hematomas cross suture lines and follow the contour of the brain forming a crescent shape, unlike epidural hematomas which don't cross suture lines and push on the brain and form a bi-convex shape.

硬膜下血肿可跨过颅缝，与大脑轮廓一致，呈新月形；相形之下，硬膜外血肿不跨过颅缝，而且压迫大脑呈双凸镜形。

Subdural hematomas are common in head traumas like falling in a wet bathtub and whacking your head, or in Shaken Baby Syndrome, where a baby is violently shaken, making their head whip back and forth, which damages the bridging veins.

硬膜下血肿在头部外伤中很常见，比如在浴缸中摔倒撞到头，或是婴儿摇晃综合征：即当婴儿受到强力摇晃时，其大脑来回的摇晃，损伤了桥静脉。

The official cause of death was ruled as a subdural hematoma, or a traumatic brain injury, but it was established that Nance was alone in his home.

官方的死因被裁定为硬膜下血肿或脑外伤，但可以确定南斯独自一人在家中。