preclude [Neurosurgery Wiki]

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PRECLUDE® Dura Substitute is indicated for use as a temporary or
permanent prosthesis for repair of dura mater during neurosurgery.
It is contraindicated for cardiovascular defects.
Description
The Second Generation PRECLUDE® Dura Substitute combines the
proven performance of inert expanded polytetrafluoroethylene
(ePTFE) with a comparably inert elastomeric fluoropolymer in a
three-layer construct. The outer ePTFE layers have a node and fibril
microstructure with an average porosity of less than one micron.
This porosity provides excellent conformability and handling while
minimizing fibrous tissue ingrowth. The elastomeric layer facilitates
a watertight seal at the suture line. Supplied as a 0.3 mm thick
membrane, PRECLUDE® Dura Substitute serves as a watertight, full
thickness dural graft which minimizes tissue attachment between
the neural structures and other tissues.