Patent ID: 8617337
Filing Date: 2013-12-31
Classification: A61F,Y10S,Y10T

Abstract:
1. A method of making an implantable medical device, comprising: extruding a first expanded polytetrafluoroethylene tube at a first extruded diameter; extruding a second expanded polytetrafluoroethylene tube at a second extruded diameter; cutting a plurality of slits in the first expanded polytetrafluoroethylene tube at the first extruded diameter; subsequent to the cutting, positioning a radially expandable support layer between the first and second expanded polytetrafluoroethylene tubes so that the slits span portions of the support layer; and laminating the first expanded polytetrafluoroethylene tube to the second expanded polytetrafluoroethylene tube through openings in the support layer.