Surgery – Blood vessel or graft preparation
Patent
1988-03-11
1989-09-26
Cannon, Alan W.
Surgery
Blood vessel or graft preparation
623 66, 156643, 1566591, 156668, 20419234, 20419235, 20419236, A61F 204, C23C 1400, B44C 122, B29C 3700
Patent
active
048697141
ABSTRACT:
A method is provided for forming a mold surface with microscopic upstanding pillars for molding the inside surface of a vascular prostheses (synthetic blood vessel). The mold article is formed from a quantity of Teflon (polytetrafluoroethylene) which has a polished, flat surface on which a gold film has been sputter deposited. A photoresist layer, which cannot adhere directly to Teflon, adheres to the gold. The photoresist is exposed and developed leaving a sputter resistant mask defining the desired pillar locations, and the resulting workpiece is ion etched to form the pillars in the Teflon. A synthetic blood vessel material is cast against the Teflon mold to form blind recesses on the inside of the synthetic blood vessel, with the recesses being of predetermined uniform cross section and present in a predetermined uniform pattern.
REFERENCES:
patent: 4064030 (1977-12-01), Nakai et al.
patent: 4114983 (1978-09-01), Maffitt et al.
patent: 4325998 (1982-04-01), Chapman
patent: 4502916 (1985-03-01), Umezaki et al.
patent: 4614706 (1986-09-01), Matsuzawa et al.
Deininger William D.
Gabriel Stephen B.
California Institute of Technology
Cannon Alan W.
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