Subdural Haematoma (SDH)Created OnMay 4, 2020Last Updated OnMay 4, 2020byadmin You are here: Main Radiology Subdural Haematoma (SDH) < All Topics Table of Contents The cerebral veins are fragil Risk of injury to these veins is increased in elderly and anti-coagulated patients SDH may result from minor trauma. There is often no clear history of trauma at all. A subdural collection is not limited by the attachment points of the dura to bone, as is seen in an extradural haematoma. The result is the formation of a crescent-shaped collection. The arachnoid remains intact and so blood does not pass into the sulci. CT Brain – SDH A large crescent-shaped collection is seen over the left side of the brain The collection is of high-density material due to the presence of clotted blood There is no blood extending into the sulci The sulci on the side of the haematoma are partially effaced indicating ‘mass effect’ CT Brain – Bilateral SDH This CT scan shows subdural haematomas on both sides – larger on the left The blood is of lower density (darker) than the adjacent cerebral cortex, indicating the subdural are chronic A small volume of high density (white) material in the right subdural haematoma indicates relatively recent bleeding *Some of the image photo is taken from web, we do not own this, it’s for knowledge sharing purpose.
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