J Neurol Surg B Skull Base 2012; 73(05): 302-307
DOI: 10.1055/s-0032-1321506
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

New Dried Human Amniotic Membrane Is Useful as a Substitute for Dural Repair after Skull Base Surgery

Takahiro Tomita
1   Departments of Neurosurgery, University of Toyama Graduate School of Medicine and Pharmaceutical Sciences, Toyama, Japan
,
Nakamasa Hayashi
1   Departments of Neurosurgery, University of Toyama Graduate School of Medicine and Pharmaceutical Sciences, Toyama, Japan
,
Motonori Okabe
2   Departments of Regenerative Medicine, University of Toyama Graduate School of Medicine and Pharmaceutical Sciences, Toyama, Japan
,
Toshiko Yoshida
2   Departments of Regenerative Medicine, University of Toyama Graduate School of Medicine and Pharmaceutical Sciences, Toyama, Japan
,
Hideo Hamada
1   Departments of Neurosurgery, University of Toyama Graduate School of Medicine and Pharmaceutical Sciences, Toyama, Japan
,
Shunro Endo
1   Departments of Neurosurgery, University of Toyama Graduate School of Medicine and Pharmaceutical Sciences, Toyama, Japan
,
Toshio Nikaido
2   Departments of Regenerative Medicine, University of Toyama Graduate School of Medicine and Pharmaceutical Sciences, Toyama, Japan
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Publikationsverlauf

12. Januar 2011

25. April 2011

Publikationsdatum:
30. Juli 2012 (online)

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Abstract

Objectives Cerebrospinal fluid (CSF) leakage is an undesirable complication of skull base surgery. We used dried human amniotic membrane (AM) as a patch graft for dural repair to determine its efficacy in preventing CSF leakage.

Design Frontoparietal craniotomy and removal of dura were performed in 20 Wistar rats. A dried AM was placed to cover the dural defect without suturing in 16 animals. In four animals, an expanded polytetrafluoroethylene was implanted. At 2 weeks and 1, 3, and 6 months, histological examination was performed. Dried AM was also used as a substitute in 10 patients who underwent skull base surgery, after approval by the Ethics Committee of the University of Toyama.

Results At 2 weeks after implantation, thick connective tissue completely enclosed the dried AM. At 1 month after implantation, the connective tissue became thin and the implanted AM shortened. At 3 and 6 months after implantation, histological examination revealed disappearance of the dried AM and formation of membranous tissue. In the clinical study, neither CSF leakage nor clinical adverse reactions directly related to the dried AM were observed.

Conclusion Dried human AM appears to be an ideal substitute for dura, since it is replaced by natural tissue.