Transcatheter prosthetic heart valve delivery device with partial deployment and release features and methods

摘要

A delivery device for percutaneously deploying a stented prosthetic heart valve, including a delivery sheath, an inner shaft, and a spindle. The inner shaft is slidably disposed within a lumen of the delivery sheath. The spindle is attached to the shaft and includes a hub defining at least one longitudinal slot sized to slidably receive a post of the stented valve. An outer surface of the hub forms a curved proximal segment. The device provides a loaded state in which the delivery sheath retains the stented valve over the inner shaft and coupled to the spindle via the slot. In a deployed state, the distal end of the delivery sheath is withdrawn from the prosthesis to permit the stented valve to release from the slot, sliding along the curved outer surface of the hub.

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 spindle attached to the shaft, the spindle including: a tubular base, a hub projecting radially outwardly relative to the base, wherein: the hub defines at least one longitudinal slot sized to slidably receive a corresponding post of a prosthetic heart valve stent frame, wherein the at least one longitudinal slot is defined by opposing side walls and a floor, and further wherein the tubular base includes a ring immediately proximal the hub, the ring having a surface aligned with the floor, an outer surface of the hub forms a proximal segment and a distal segment, the proximal segment being curved in extension toward the distal segment and defining a ramp-like face immediately adjacent the base, the distal segment defining a distal face, wherein the at least one longitudinal slot is open at the proximal and distal faces; wherein the device is configured to provide a loaded state in which the delivery sheath assembly retains a stented prosthetic heart valve over the inner shaft and coupled to the spindle via the at least one slot, and a deployment state in which the distal end of the delivery sheath assembly is withdrawn from the prosthetic heart valve to permit the prosthetic heart valve to release from the at least one longitudinal slot.