Delivery System Having an Integral Centering Mechanism for Positioning a Valve Prosthesis in Situ

摘要

Embodiments hereof relate to a delivery system for a transcatheter valve prosthesis, the delivery system having an integral centering mechanism to circumferentially center both the delivery system and the valve prosthesis within a vessel at the target implantation site. The centering mechanism may include expandable wings that may be selectively aligned with openings formed through a sidewall of an outer shaft of the delivery system, a coiled wing that may be selectively exposed through an opening formed through a sidewall of an outer shaft of the delivery system, a plurality of elongated filaments extending through a plurality of lumens of an outermost shaft of the delivery system that may be selectively deployed or expanded, an outer shaft that includes at least one pre-formed deflection segment formed thereon, a tool having a deployable lever arm, and/or a plurality of loops deployable via simultaneous longitudinal and rotational movement.

主权项

1. A delivery system for a valve prosthesis configured for delivery within a vasculature, the delivery system comprising:
an outer shaft defining a lumen and at least two windows formed through a sidewall thereof; an inner shaft concentrically disposed within the lumen of the outer shaft, the inner shaft having a distal portion being configured to receive the valve prosthesis thereon; and at least one centering mechanism including at least two wings, a first end of each wing being attached to the inner shaft and a second end being free to slide over the inner shaft, wherein when the centering mechanism is in a delivery configuration each wing is offset from one of the windows of the outer shaft and has a straightened profile that is enclosed between the outer and inner shafts and when the centering mechanism is in an expanded configuration each wing has a curved, bowed profile and is aligned with and radially extends through one of the windows of the outer shaft.