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Stent-valves for valve replacement and associated methods and systems for surgery

  • US 10,265,167 B2
  • Filed: 01/18/2017
  • Issued: 04/23/2019
  • Est. Priority Date: 12/22/2005
  • Status: Active Grant
First Claim
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1. A method for implanting a stent-valve at an implantation site for cardiac valve replacement, comprising the steps of:

  • providing a stent-valve and a delivery device, the delivery device including a stent-holder and an outer-sheath;

    removably attaching the stent-valve to the delivery device by way of the stent-holder and the outer sheath, wherein;

    the stent-valve comprises a valve component, and a stent component including at least two integral attachment elements provided therewith,the stent component and the valve component configured with a collapsed configuration for delivery and an expanded configuration after implantation,the at least two attachment elements are matably attached to the stent-holder, such that the stent-valve is held in position with respect to the delivery device by the stent-holder,in a closed position, the outer sheath encompasses the stent-valve and constrains expansion of the stent-valve, andthe outer sheath is configured for distal movement relative to the stent holder in order to transition from the closed position, to a partially-open position, to an open position;

    delivering the stent-valve to the implantation site in the collapsed condition;

    partially expanding the stent-valve while maintaining attachment of the at least two attachment elements to the stent-holder, such that the stent-holder holds the stent-valve in position with respect to the delivery device;

    determining whether the partially expanded stent-valve is positioned correctly at the implantation site;

    wherein upon the determination being positive, allowing the at least two attachment elements to detach from the stent-holder to cause the stent-valve to expand from the partially expanded configuration to the expanded configuration; and

    wherein upon the determination being negative, returning the stent-valve to the collapsed configuration and repositioning the stent-valve at the implantation site.

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