Epidemiology and aetiology
- The trauma may be so minor / so long ago that none can be recalled!
- Elderly patients are particularly at risk due to shrinkage of the brain with age as a result of atherosclerosis
Signs and Symptoms
- Symptoms often fluctuate over time, e.g.:
- Personality change
- Other signs include:
- Late signs include focal neurological signs (e.g. unequal pupils, hemiparesis). Typical time from injury to onset of focal symptoms is 63 days!
- CT / MRI – typically a cresent of blood around the outer edge of the brain. Also look for midline shift of brain structures. In acute bleeds, blood will be hyperdense relative to brain tissue. In chronic bleeds, it will be hypodense. There is an intervening period where densities are similar, and visualising a bleed can be difficult.
- In acute-on-chronic bleeds, there may be a hypodense chronic bleed, as well as a hyperdense acute bleed
- Starts with the basics – ABCDE. Start oxygen. Maintain SBP >90mmHg
- Irrigation / evacuation / Burr hole craniostomy – via a burr twist drill – basically a hole is drilled into the skull
- Craniotomy – flap of bone is cut and temporarily left open to relieve high ICP. Used less often that burr hole
- Try to find cause of trauma – e.g. the cause of falls, cataracts alcohol, etc