durotomy
The surgical opening or incision of the dura mater, the tough outer membrane covering the brain.
Full Definition
Durotomy refers to the deliberate surgical incision of the dura mater, the thick, fibrous membrane that forms the outermost protective layer around the brain and spinal cord. This procedure is an essential step in most neurosurgical operations, allowing surgeons to access underlying brain tissue safely. The dura must be opened carefully to prevent cerebrospinal fluid leaks and minimize risk of infection. Following the procedure, the dura is typically closed with sutures to restore the protective barrier. Accidental durotomy during surgery is considered a complication requiring immediate repair.
Usage
Usage note: Distinguish from craniotomy, which refers to opening the skull bone, not the dural membrane.
In Context
- "After the craniotomy, a careful durotomy was performed to expose the tumor." — surgical report
- "The inadvertent durotomy was immediately repaired with a fascial graft." — complication note