Subdural haematoma (SDH) age
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Subdural haematoma (SDH) age
- This patient with a subdural haematoma had three CT scans - one at the time of injury, one at 1 month and another at 2 months post injury
- Initially the subdural haematoma is higher in density or 'hyperdense' (whiter) when compared to the adjacent brain cortex
- At 1 month the collection is difficult to see because it is identical in density or 'isodense' to the adjacent brain cortex
- At 2 months the subdural is 'hypodense' (darker) when compared to the adjacent brain cortex
Clinical information
- Memory loss following a fall
Chronic SDH with rebleeding
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Chronic SDH with rebleeding
- Subdural haematomas may be bilateral - as in this image
- The low density material in these subdural collections is due to a chronic subdural haematoma
- The higher density layered material is due to more recent haemorrhage
Clinical information
- Traumatic bilateral subdural haematomas seen on a previous CT several weeks earlier
- Recent increased drowsiness
- Note: Chronic subdurals can present without a clear history of trauma
Hyperacute subdural haematoma
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Hyperacute subdural haematoma
- This crescent-shaped subdural haematoma contains mixed high density and low density material
- The dense (white) material represents recently clotted blood
- The less dense blood (grey) is not due to a chronic haematoma, it is hyperacute blood which has not yet had time to clot
- (The bone windows did not demonstrate a skull fracture)
Clinical information
- Alcoholic with poor liver function and deranged clotting
- Reduced consciousness following minor head injury