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System and method of stepped deployment of prosthetic heart valve

  • US 10,149,758 B2
  • Filed: 04/01/2014
  • Issued: 12/11/2018
  • Est. Priority Date: 04/01/2014
  • Status: Active Grant
First Claim
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1. A system for replacing a heart valve of a patient, the system comprising:

  • a delivery device comprising;

    an inner shaft assembly including an intermediate portion providing a coupling structure,a primary capsule slidably disposed over the inner shaft assembly, anda secondary capsule including a tubular sheath slidably disposed over the inner shaft assembly; and

    a prosthetic heart valve having a stent frame and a valve structure attached to the stent frame, the prosthetic heart valve being expandable from compressed arrangements to expanded arrangements;

    wherein the system is configured to be transitionable between;

    a loaded state in which the prosthetic heart valve engages the coupling structure and an entirety of the prosthetic heart valve is compressively retained within the primary capsule, the primary capsule constraining the prosthetic heart valve in a compressed arrangement;

    wherein the secondary capsule is positioned over the primary capsule in the loaded state,a partially deployed state in which the prosthetic heart valve engages the coupling structure and is compressively retained within the secondary capsule, the partially deployed state including the primary capsule at least partially retracted from over the prosthetic heart valve and the secondary capsule at least partially constraining the prosthetic heart valve to a partially deployed arrangement, the partially deployed arrangement being less compressed than the compressed arrangement and less expanded than a deployed arrangement, wherein the partially deployed state includes the valve structure of the prosthetic heart valve configured to open and close in concert with a heartbeat, anda deployed state in which the primary and secondary capsules are retracted from over the prosthetic heart valve and the prosthetic heart valve is expanded to the deployed arrangement and released from the coupling structure.

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