duroplasty

Duroplasty, also known as duraplasty, is a neurosurgical procedure in which the dura mater, the outer protective covering of the brain and spinal cord, is repaired or augmented with a patch graft. The goal is to close a dural defect and, in cases of swelling or large dissections, to increase the dural space to accommodate cerebrospinal fluid and brain tissue while reducing the risk of leakage and constriction.

Indications for duroplasty include repair of dural defects after cranial or spinal surgery, management of traumatic or tumoral processes that disrupt the dura, and procedures such as decompressive craniectomy where swelling necessitates a durable, watertight closure. It may be performed during craniotomies, after tumor resections, or in cases of persistent cerebrospinal fluid leaks.

Techniques typically involve placing a patch graft over the exposed dural edge and securing it to healthy dura using sutures, often supplemented by adhesive sealants to achieve a watertight seal. Graft materials may be autologous tissue (for example, fascia lata or pericranium), allografts, xenografts, or synthetic dural substitutes such as collagen matrices or expanded polytetrafluoroethylene. In some settings, especially after decompression, the patch is combined with a staged cranioplasty.

Complications can include cerebrospinal fluid leaks, infection, graft intolerance or failure, pseudomeningocele formation, and seizures. When performed with appropriate technique and materials, duroplasty aims to restore dural integrity and reduce postoperative CSF-related complications. See also cranioplasty, dura mater, and decompressive craniectomy.