Systems and methods for delivering a medical implant
The present invention relates to apparatus and methods for endovascularly delivering and releasing a prosthesis, e.g., an aortic prosthesis, within and/or across a patient's native heart valve, referred to hereinafter as replacing the patient's heart valve. In some embodiments the delivery system comprises a plurality of first actuatable element adapted to engage a plurality of second elements in a first configuration to capture the implant within the delivery system, and wherein the plurality of first actuatable element are adapted to engage the plurality of second elements in a second configuration and to release the implant from the delivery system.
1. A system comprising:
an implantable medical device comprising an expandable anchor configured to be implantable within a patient;
a post engaged to a proximal end of the anchor, the post having an outer surface and an inner surface, the inner surface defining a first lumen, the post having at least one ratcheting lock element that extends through the outer surface and is in communication with the first lumen; and
an anchor lock element defining a second lumen, the anchor lock element configured to be disposed about a portion of the outer surface of the post, the anchor lock element further having at least one tab, the at least one tab having a first state and a second state, wherein in the first state the at least one tab extends into the second lumen of anchor lock element and the first lumen of the post thereby securing the anchor lock element to the post, and wherein in the second state the at least one tab does not extend into the first lumen of the post.
2. The system of claim 1 , further comprising an actuator configured to be advanced through the first lumen and the second lumen, wherein the advancement displaces the at least one tab from the first state to a second state and releases the anchor lock element.
3. The system of claim 2 , wherein the actuator comprises a mandrel having a tapered end.
4. The system of claim 1 , wherein the implantable medical device is a replacement valve, the system further comprising:
a valve support structure engaged to the post; and
at least one valve leaflet engaged to the valve support structure.
5. The system of claim 1 , wherein the at least one tab is positioned along a first axis.
6. The system of claim 1 , wherein the at least one ratcheting lock element comprises a plurality of slots.
7. The system of claim 6 , wherein the at least one tab is positioned along a second axis substantially perpendicular to the first axis.
8. The system of claim 7 , wherein the outer surface of the post defines a groove that extends along a longitudinal length of the post and connects the plurality of slots, and wherein the groove is configured to receive a portion of the at least one tab.
9. The system of claim 1 , further comprising at least one attachment element engaged to the post, wherein the at least one attachment element is configured to engage the anchor.
10. The system of claim 1 , wherein the anchor lock element comprises an attachment element configured to engage a portion of the anchor.
11. The system of claim 1 , wherein the anchor comprises a braided wire.