A chronic subdural hematoma is an "old" collection of blood and blood breakdown products between the surface of the brain and its outermost covering (the dura. The chronic phase of a subdural hematoma begins several weeks after the first bleeding.
- ABC protocol
- Trephination of cranium
A chronic subdural hematoma (SDH) is a collection of blood on the brain's surface under the outer covering of the brain (dura).