Patent ID: 7901446

Claim:
A self-sealing graft comprising: i) a first tubular structure formed from ePTFE tape helically wound such that adjacent turns of the ePTFE tape overlap and wherein said tubular structure has a wall thickness of 0.2 mm or less; ii) a second tubular structure formed from ePTFE by: (a) wrapping a layer of unsintered ePTFE tape helically around a mandrel such that adjacent turns of the ePTFE tape overlap, at least two adjacent layers of the ePTFE tape wrapped in a different helical angle to each other; (b) sintering the tape by heating above the crystalline melting point of ePTFE to form a sintered tubular structure; and (c) removing the sintered ePTFE tubular structure from the mandrel; and (iii) a resealable polymer layer disposed between said first tubular structure and said second tubular structure.