Chronic subdural haematomas and anticoagulation or anti-thrombotic therapy.

Eighty-one cases of chronic subdural haematomas (CSDH) admitted to the neurosurgical unit of the Royal Hobart Hospital, Tasmania, Australia, over a 5-year period were reviewed. The use of anticoagulant therapy as a causative agent in the development of CSDH was investigated. We suspected a high incidence of anticoagulant or anti-thrombotic therapy.