Endoscopic repair of high-flow cranial base defects using a bilayer button

Area of Science:

• Neurosurgery
• Skull Base Surgery
• Cerebrospinal Fluid (CSF) Leak Repair

Background:

• Dural defect repair is a critical step in skull base surgery.
• High-flow cerebrospinal fluid (CSF) leaks pose a significant challenge.
• Traditional repair methods have associated high complication rates.

Purpose of the Study:

• To introduce and evaluate a new button graft technique for primary dural defect repair.
• To assess the efficacy of the button graft in reducing CSF leak complications in high-flow defects.
• To compare the outcomes of the button graft technique with previous repair methods.

Main Methods:

• Retrospective review of 20 cases utilizing the primary button graft technique.
• Comparison with 20 historical cases of high-flow open-cistern CSF leaks.
• Button graft construction involves an intradural inlay and extradural onlay, sutured together.

Main Results:

• The button graft technique resulted in a significant reduction in CSF leak complications to 10% (2/20).
• This represents a substantial improvement compared to the 45% leak rate in the pre-button graft group (P < .03).
• Two leaks in the button graft group were successfully repaired using the same technique as salvage surgery.

Conclusions:

• The button graft is an effective method for repairing high-flow dural defects.
• It can be used with or without a nasoseptal flap, achieving a 10% postoperative leak rate.
• This technique offers a significant advancement in managing CSF leaks in skull base surgery.