Patent ID: 8308789
Filing Date: 2012-11-13
Classification: A61B,A61F

Abstract:
1. A delivery system for an endoprosthesis comprising a self-expanding endoprosthesis having a length, a proximal end and a distal end, a first, small diameter for insertion into a body conduit and a second, larger deployed diameter, said endoprosthesis being constrained at the first smaller diameter by a removable tubular sheath having corrugations and extends over substantially the entire length of the endoprosthesis, wherein a continuing portion of the removable tubular sheath that has been formed into a tether extends proximally beyond the proximal end of the endoprosthesis, wherein said delivery system does not include a balloon, and wherein a tensile force applied to the tether in the proximal direction causes the corrugations to pull out sequentially such that after the corrugations have all been pulled out, the length of the sheath is extended by at least about 10% and axial displacement of the tubular sheath has occurred in the proximal direction.