PROSTHETIC CARDIAC VALVE DEVICES, SYSTEMS, AND METHODS
A heart valve prosthesis for replacing a diseased native valve in a patient, the valve includes an expandable frame structure and an anchor. The anchor comprises a free end and has a flat spiral shape. The anchor comprises a housing, a lumen disposed within the housing, and a plurality of spiral bands translatably disposed within the housing. The valve may further include a valve segment mounted within the frame structure and expanded with the frame structure. The frame structure may be configured for receiving a valve segment.
1 . A system for treating a diseased native valve in a patient, the system comprising:
a frame structure having an unexpanded configuration and an expanded configuration; and
an anchor comprising a free end and having a flat spiral shape, wherein the anchor comprises housing, a lumen disposed within the housing, and a plurality of spiral bands translatably disposed within the lumen;
wherein the frame structure is configured to be actuated from the unexpanded configuration to the expanded configuration adjacent a native valve in a patient; and
wherein the anchor is configured to anchor the frame structure to the native valve when the frame structure is in the expanded configuration adjacent the native valve.
2 . The system of claim 1 , wherein the plurality of spiral bands are slidably disposed within the lumen relative to one another.
3 - 6 . (canceled)
7 . The system of claim 1 , wherein the anchor comprises the flat spiral shape in the expanded configuration.
8 - 9 . (canceled)
10 . The system of claim 1 , wherein the anchor comprises one or more locking mechanisms configured to maintain the anchor in the expanded configuration.
11 . The system of claim 10 , wherein the one or more locking mechanisms comprise a frictional band, a polymer coating, or one or more key and one or more key hole features.
12 . The system of claim 10 , wherein the one or more locking mechanisms comprise a pin on a first spiral band of the plurality of spiral bands and a correspondingly-shaped hole on a second spiral band of the plurality of spiral bands.
13 . The system of claim 10 , wherein the one or more locking mechanisms comprise a plurality of slots on the plurality of spiral bands and a correspondingly-shaped pin.
14 . The system of claim 10 , wherein the one or more locking mechanisms comprise a first feature disposed on a first loop of the anchor and a correspondingly-shaped second feature disposed on a second loop of the anchor, the first and second features configured to nest with one another when the anchor is in the deployed configuration.
15 - 18 . (canceled)
19 . The system of claim, further comprising a delivery device, the delivery device comprising an outer sheath, wherein the anchor is disposed in a lumen of the outer sheath and maintained in the expanded configuration by radial constriction from the outer sheath, and wherein advancement of the anchor out of the lumen of the outer sheath actuates the anchor into the expanded configuration.
20 . The system of claim 19 , wherein the delivery device further comprises an inner shaft, wherein the inner shaft is disposed within the lumen of the outer sheath.
21 . The system of claim 20 , wherein a proximal portion of the frame structure or a proximal end of the anchor is coupled to a distal portion of the inner shaft.
22 . The system of claim 20 , wherein advancement of the inner shaft towards an opening of the lumen of the outer sheath advances the anchor out of the lumen of the outer shaft and actuates the anchor into the expanded configuration.
23 - 27 . (canceled)
28 . The system of claim 19 , wherein the frame structure is detachably coupled to the delivery device in the unexpanded configuration during delivery to the native valve.
29 . The system of claim 19 , wherein expansion of the frame structure to the expanded configuration detaches the frame structure from the delivery device.
30 - 41 . (canceled)
42 . The system of claim 1 , wherein the expanded configuration is a generally tubular expanded shape.
43 - 60 . (canceled)
61 . A method for treating a diseased native valve in a patient, the method comprising:
advancing a frame structure and an anchor having a flat spiral shape from a first side of a native valve to a second side of the native valve, wherein the anchor comprises housing, a lumen disposed within the housing, and a plurality of spiral bands translatably disposed within the lumen;
deploying the anchor adjacent the native valve;
expanding the frame structure within the native valve from an unexpanded configuration to an expanded configuration; and
anchoring the frame structure in the expanded configuration to the native valve with the anchor.
62 . The method of claim 61 , wherein deploying the anchor comprises deploying the anchor from a delivery configuration to a deployed configuration.
63 . The method of claim 62 , wherein the anchor is configured to wrap at least partially around a delivery device in the deployed configuration.
64 . The method of claim 62 , wherein the anchor is configured to wrap at least partially around the frame structure in the deployed configuration.
65 . The method of claim 62 , wherein a central point of the flat spiral shape is co-axial with a longitudinal axis of a delivery device when the anchor is in the deployed configuration.
66 - 105 . (canceled)