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  • Title: Collagen sponge repair of small cerebrospinal fluid leaks obviates tissue grafts and cerebrospinal fluid diversion after pituitary surgery.
    Author: Kelly DF, Oskouian RJ, Fineman I.
    Journal: Neurosurgery; 2001 Oct; 49(4):885-9; discussion 889-90. PubMed ID: 11564250.
    Abstract:
    OBJECTIVE: Repair of a cerebrospinal fluid (CSF) leak created at the time of transsphenoidal surgery typically involves placement of a fat, fascial, or muscle graft and sellar floor reconstruction. In this report, a simplified repair for small, "weeping" CSF leaks using collagen sponge is described. METHODS: All patients underwent an endonasal transsphenoidal procedure using the operating microscope. At the completion of tumor removal, if a small CSF leak was noted but no obvious large arachnoidal defect was present, a piece of collagen sponge was fashioned to cover the exposed diaphragma sellae. Titanium mesh was then wedged into the intrasellar, extradural space and a larger piece of collagen was placed over the reconstructed sellar floor. Nasal packing was removed within 24 hours. RESULTS: During an 18-month period, 62 consecutive transsphenoidal procedures were performed for tumor removal. Of 20 patients with a small CSF leak (18 pituitary adenomas, 1 Rathke's cleft cyst, and 1 chordoma), all had successful repair with collagen sponge. At follow-up examinations at 1 to 18 months, no patient had required a lumbar drain or had developed meningitis. One other patient had a large intraoperative arachnoidal defect that was unsuccessfully repaired with the collagen sponge technique; in this patient, a second operation was required with a fat graft, sellar floor reconstruction, and lumbar drainage. CONCLUSION: A simplified repair of small CSF leaks after transsphenoidal surgery using a two-layered collagen sponge technique with sellar floor reinforcement is thought to be safe and effective and obviates the need for tissue grafts, fibrin glue, or lumbar drain placement.
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