Expandable radiopaque marker for transcatheter aortic valve implantation
First Claim
1. A method of determining the position of a collapsible prosthetic heart valve in a patient, the method comprising:
- providing a delivery device including a support shaft around which a compartment is defined, a distal sheath adapted to selectively cover and uncover the compartment, and a marker cage having a collapsed condition when the distal sheath covers the compartment and an expanded condition when the compartment is uncovered, the marker cage including a plurality of ribs disposed around a longitudinal axis of the support shaft, each rib having at least one radiopaque marker;
mounting a collapsible prosthetic heart valve in the compartment so that the marker cage is positioned within the valve;
sliding the distal sheath to cover the compartment and the valve, and to maintain the marker cage in the collapsed condition;
inserting the delivery device into the patient;
positioning the delivery device so that the valve is positioned at a target location within the patient;
partially deploying the valve by sliding the distal sheath to partially uncover the compartment and the valve;
determining the position of the at least one marker relative to a native valve annulus of the patient;
fully deploying the valve by continuing to slide the distal sheath to fully uncover the valve, whereupon the marker cage will be in the expanded condition; and
compressing the marker cage to the collapsed condition by sliding the distal sheath to at least partially cover the compartment and the marker cage,wherein the steps of partially deploying and fully deploying include expanding the marker cage with each rib positioned between adjacent leaflets of the valve.
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Accused Products
Abstract
A delivery device for a collapsible prosthetic heart valve includes a support shaft around which a compartment for the valve is defined, a distal sheath adapted to selectively cover and uncover the compartment and the valve, and a marker cage having a collapsed condition when the distal sheath covers the compartment and an expanded condition when the compartment is uncovered. The marker cage includes at least one rib having a radiopaque marker for determining the positioning of the valve as it is deployed. The valve may be assembled around the marker cage so that the marker cage does not interfere with the radial expansion of the valve during deployment.
114 Citations
13 Claims
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1. A method of determining the position of a collapsible prosthetic heart valve in a patient, the method comprising:
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providing a delivery device including a support shaft around which a compartment is defined, a distal sheath adapted to selectively cover and uncover the compartment, and a marker cage having a collapsed condition when the distal sheath covers the compartment and an expanded condition when the compartment is uncovered, the marker cage including a plurality of ribs disposed around a longitudinal axis of the support shaft, each rib having at least one radiopaque marker; mounting a collapsible prosthetic heart valve in the compartment so that the marker cage is positioned within the valve; sliding the distal sheath to cover the compartment and the valve, and to maintain the marker cage in the collapsed condition; inserting the delivery device into the patient; positioning the delivery device so that the valve is positioned at a target location within the patient; partially deploying the valve by sliding the distal sheath to partially uncover the compartment and the valve; determining the position of the at least one marker relative to a native valve annulus of the patient; fully deploying the valve by continuing to slide the distal sheath to fully uncover the valve, whereupon the marker cage will be in the expanded condition; and compressing the marker cage to the collapsed condition by sliding the distal sheath to at least partially cover the compartment and the marker cage, wherein the steps of partially deploying and fully deploying include expanding the marker cage with each rib positioned between adjacent leaflets of the valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification