Changes

!  !! Vessel affected !! History !! Imaging

!  !! Vessel affected !! History !! Imaging

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| Epidural || Middle meningeal artery || High energy impact (e.g. MVA), Lucid interval || Lens shaped (high pressure arterial bleed compresses brain); crosses suture lines

| Epidural || Middle meningeal artery || High energy impact (e.g. MVA), Lucid interval || Lens shaped (high pressure arterial bleed compresses brain); doesn't cross suture lines

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| Subdural || Bridging veins || Old person or alcoholic with a fall || Crescent shaped (low pressure venous bleed doesn't compress); doesn't cross midline

| Subdural || Bridging veins || Old person or alcoholic with a fall (low energy) || Crescent shaped (low pressure venous bleed doesn't compress); may cross suture lines

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