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Balloon expandable endoprosthesis

  • US 10,299,948 B2
  • Filed: 11/24/2015
  • Issued: 05/28/2019
  • Est. Priority Date: 11/26/2014
  • Status: Active Grant
First Claim
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1. A medical device, comprising:

  • a stent-graft defining a first free end, a second free end, and an intermediate portion between the first and second free ends, the stent-graft having an undeployed state with an undeployed diameter and an undeployed longitudinal length between the first free end and the second free end and a deployed state with a deployed diameter and a deployed longitudinal length between the first free end and the second free end, the stent-graft including a stent portion and a graft portion; and

    a catheter assembly onto which the stent-graft is assembled in the undeployed state, the catheter assembly including,a balloon, anda cover including a middle portion situated between first and second end portions of the cover, the cover concentrically surrounding the balloon such that the first and second end portions of the cover impart a resistance to expansion of the balloon that exceeds a resistance to expansion imparted to the balloon by the middle portion of the cover, the stent-graft disposed about the cover and the balloon such that the intermediate portion of the stent-graft in combination with the cover imparts a resistance to expansion of the balloon at the intermediate portion of the stent-graft that exceeds the resistance imparted on the balloon by the first and second end portions of the cover, wherein a difference in an expansion rate of the balloon at the first and second free ends of the stent-graft is reduced relative to an expansion rate of the balloon at the intermediate portion of the stent-graft so as to reduce longitudinal compression of the stent-graft as the balloon expands the stent-graft from its undeployed state to its deployed state.

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