Medical device for modification of left atrial appendage and related systems and methods
Devices, methods and systems are provided for occluding an opening within the tissue of a body, such as a left atrial appendage. In one embodiment, a medical device includes an occluder portion and an anchor portion. The occluder portion includes a hub that defines an axis, the occluder portion extending between a proximal end coupled to the hub and a distal end defining an occluder eyelet adjacent thereto. The anchor portion extends between a first end and a second end, the first end coupled to an anchor hub and the second end defining an anchor eyelet adjacent thereto and hingeably coupled to the occluder eyelet. With this arrangement, the anchor hub is moveable along the axis to move the anchor portion between a retracted position and a deployed position upon the occluder portion being in an expanded position.
1. A medical device for implantation in a left atrial appendage of a heart, the medical device comprising:
first frame segments extending from a hub and defining an axis, the first frame segments extending between a proximal end coupled to the hub and a distal end defining first coupling portions adjacent thereto; and
second frame segments extending between a first end and a second end, the first end coupled to a secondary hub and the second end operably coupled to the hub;
wherein, upon the first frame segments being in an expanded position, the secondary hub is moveable along the axis to move the second frame segments between a retracted position and a deployed position; and
wherein the hub includes a hub distal end that remains proximal the distal end of the first frame segments.
2. The medical device of claim 1 , wherein the second frame segments include anchoring tines extending therefrom.
3. The medical device of claim 2 , wherein the anchoring tines each extend with an acute angle relative to the second frame segments, the acute angle having a range between about 25 degrees and about 60 degrees.
4. The medical device of claim 2 , wherein the anchoring tines each extend with a height relative to the second frame segments, the height having a range between about .020 inches and about .050 inches.
5. The medical device of claim 2 , wherein the anchoring tines extending from a single strut are spaced a distance from adjacent tines within a range between about .060 inches and .015 inches.
6. The medical device of claim 1 , wherein the second frame segments comprise anchoring tines aligned with and extending from struts defining the second frame segments, the struts being non-aligned relative to the axis.
7. The medical device of claim 1 , further comprising a polymeric member coupled to the first frame segments along at least a proximal side of the first frame segments.
8. The medical device of claim 1 , further comprising a tissue growth member coupled to the first frame segments along at least a proximal side of the first frame segments.
9. The medical device of claim 1 , wherein the proximal end of each of the first frame segments is coupled to the hub with a hinge arrangement.
10. The medical device of claim 1 , wherein the first coupling portions comprise first segment eyelets.
11. The medical device of claim 10 , wherein the second end of the second frame segments define second segment eyelets that are hingeably coupled to corresponding ones of the first segment eyelets.
12. The medical device of claim 1 , wherein the first coupling portions of the first frame segments comprise a clip.
13. The medical device of claim 1 , wherein the first frame segments are interconnected to the second frame segments such that, upon the second frame segments being moved to the deployed position, the second frame segments are configured to anchor to tissue.