Aortic valve positioning systems, devices, and methods

摘要

Systems, devices, and methods for locating a geometric plane within a patient's vasculature, for example, an entry plane to a valve, are disclosed. In one example, a medical device can include a body member and an expandable element. The body member can extend along a longitudinal axis of the medical device and at least partially define a lumen. The body member can include at least one opening disposed in fluid communication with the lumen. The expandable element can include at least two radiographic markers and can be movable between at least a first configuration and a second configuration. The at least two radiographic markers can be disposed within the lumen when the expandable element is in the first configuration. The at least two radiographic members can be disposed outside of the lumen and can be radially offset from the longitudinal axis when the expandable element is in the second configuration.

主权项

1. A medical device, comprising:
a body member extending along a longitudinal axis and defining a lumen having an opening; an expandable element, at least partially disposed within the lumen, extending from a proximal end portion to a distal end portion and including a plurality of flexible members and radiographic markers, a distal tip portion of each flexible member including a pigtail shape or a J-shape having a distal most curvature to which a radiopaque marker is disposed or integrated; and a knob engaged with the proximal end portion of the expandable element, the knob, when actuated, configured to move the expandable element back and forth between a first configuration, in which the plurality of radiographic markers are disposed within the lumen, and a second configuration, in which the plurality of radiographic markers are disposed outside of the lumen, wherein the plurality of radiographic markers pass through the opening of the body member when the expandable element moves between the first configuration and the second configuration.