โ Scribed by Leidner, Jacob ;Wong, Edward W. C. ;MacGregor, David C. ;Wilson, Gregory J.
No coin nor oath required. For personal study only.
A novel process has been developed for the manufacture of porous vascular grafts from solutions or melts of polymers. It allows the manufacture of grafts w-ith controllable porosity, pore size, and mechanical properties. In this process, the polymer melt or polymer solution is extruded through fine orifices; the fibers are then stretched and wound on a rotating mandril. Fiber-fiber bonding takes place, resulting in the formation of stable porous tubes. The effects of the process variables on the physical properties of the resulting graft have been studied and preliminary in vizw evaluation in dogs has demonstrated graft patency with a thin, stable neointima in both small (4 mm) and large (10 mm) caliber configurations.
๐ SIMILAR VOLUMES
## Abstract The development of a mathematical model to be used in a simulation software for the description of rubber extrusion operating points is presented. A discrete model for the flow has been introduced, which considers the flow in the main direction and in the cross section of the screw chan
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