Transcatheter prosthetic heart valve delivery device with biased release features

摘要

A delivery system for percutaneously delivering and deploying a stented prosthetic heart valve. The delivery device includes a delivery sheath slidably disposed over an inner shaft, and a capture assembly. The capture assembly includes a spindle and a biasing member. The spindle is attached to the inner shaft and defines slot. The biasing member is disposed within the slot and self-transitions from a deflected condition to a normal condition. In a delivery state, the delivery sheath retains the prosthesis over the inner shaft and coupled to the spindle via the capture slot, including a portion of the prosthetic valve being engaged within the slot and the biasing member forced to the deflected condition. In a deployment state, the delivery sheath is proximally withdrawn and the biasing member self-transitions toward the normal condition to eject the prosthetic valve from the capture slot.

主权项

1. A delivery device for percutaneously deploying a stented prosthetic heart valve including a stent frame to which a valve structure is attached, the device comprising:
a delivery sheath assembly terminating at a distal end and defining a lumen; an inner shaft slidably disposed within the lumen; and a capture assembly for selectively coupling a prosthetic heart valve relative to the inner shaft, the capture assembly including: a spindle attached to the inner shaft, the spindle defining a plurality of circumferentially spaced capture slots, a first biasing member disposed within a first one of the plurality of capture slots and configured to self-transition from a deflected condition to a normal condition, wherein a radial projection of the biasing member relative to a centerline of the inner shaft is greater in the normal condition than in the deflected condition; wherein the delivery device is configured to provide: a delivery state in which the delivery sheath assembly is configured to retain a stented prosthetic heart valve over the inner shaft via the first capture slot, including a portion of the prosthetic heart valve engageable within the first capture slot and the first biasing member forced to the deflected condition, a deployment state in which the distal end of the delivery sheath assembly is withdrawn from the first capture slot, including the first biasing member self-transitioning toward the normal condition to exteriorly close at least a portion of the first capture slot.