Chronic subdural haematoma treated by burr holes and closed system drainage: Personal experience in 131 patients

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Abstract
One-hundred and thirty-one patients with chronic subdural haematoma were treated by burr holes and closed system drainage. Four patients died, and in 19 patients postoperative complications were noted: intracranial hypotension in eight, cerebral oedema in four, haematoma recurrence in three, bronchopneumonia in three, and intracerebral haematoma in one. The high risk groups were those in grade III and IV on admission, and the elderly. Follow-up revealed that more than 80% of patients recovered completely, 10% still had neurological or mental deficits and 7% suffered epileptic seizures.