Extradural haemorrhage Flashcards

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1
Q

Cause

A

Almost always the result of trauma

Low impact

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2
Q

Location

A

Often in temporal region as thin skull at pterion

Middle meningeal artery vulnerable to injury

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3
Q

Presentation

A

Loses, briefly regains and loses consciousness again after low-impact head injury

Brief regain is lucid interval

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4
Q

Loss of lucid interval

A

Due to expanding haematoma and brain herniation

As haematoma expands, uncus of temporal lobe herniates around tentorium cerebelli and patient develops fixed and dilated pupil

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5
Q

Pupils

A

One fixed and dilated due to compression of parasympathetic fibres of third cranial nerve

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6
Q

Imaging

A

Biconvex hyperdense collection around the surface of the brain

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7
Q

Treatment

A

Craniotomy and evacuation of the haematoma

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