A New Porcine Skull Base Model Fibrin Glue Improves Strength of Cerebrospinal Fluid leak Repairs

OBJECTIVES: Fibrin glue is used in addition to grafts and flaps to repair cerebrospinal (CSF) leaks. We designed a porcine model to test the hypothesis that fibrin glue increases biomechanical strength.STUDY DESIGN: A randomized experimental animal study.METHODS: Ten pigs underwent craniotomy with creation of a fistula through the cribriform plate into the nasal cavity. CSF leaks were endoscopically confirmed and repaired using pericranial grafts. The animals were randomized into a fibrin glue group (n = 5) and a control group (n = 5). Seven days later, endoscopic examination assessed for CSF leaks. The skull bases were harvested and examined for the degree of graft adherence (graded I-V) and subjected to burst pressure testing and histopathological analysis.RESULTS: Eight animals survived, four in each group. There were no CSF leaks in the fibrin glue group and one in the control group. The fibrin glue group showed greater graft adherence (P = 0.029) and higher burst pressures (13.8 ± 5.4 vs 4.6 ± 3.1 ps...