Flanged occlusion devices and methods
Implantable occlusion devices that include one or more flanges extending from a tubular body are disclosed. The flange or flanges may assist in retention of the device within a vessel, cavity, appendage, etc. At least one flange on the occlusion device may include a concave surface proximate one end of a body. Because of the shape of the flange, e.g., its concavity, the occlusion device may resist dislocation due to e.g., the forces generated within the left atrial appendage during atrial fibrillation.
1. A medical device for deployment in a body, wherein the device comprises:
a tubular body comprising a first end and a second end, the body defining longitudinal axis extending between the first end and the second end, the body comprising a body width measured transverse to the longitudinal axis; and
a plurality of flanges attached to the body and extending outwardly from the body and around the entire periphery of the body, wherein each flange of the plurality of flanges respectively comprises a concave outer surface facing the first end of the body and a convex surface facing away from the first end of the body, when the device is in a relaxed configuration,
wherein, when the device is in the relaxed configuration, the body width proximate each flange of the plurality of flanges is less than the flange width and the body width is greater proximate to the first end of the body than proximate to the second end of the body.
2. A medical device according to claim 1 , wherein at least one flange of the plurality of flanges is attached to the body proximate the second end of the body.
3. A medical device according to claim 1 , wherein at least one flange of the plurality of flanges comprises a flange lip spaced from the body along a direction transverse to the longitudinal axis, and wherein the flange lip is located between the first end and the second end of the body when the device is in the relaxed configuration.
4. A medical device according to claim 3 , wherein the flange lip is configured to be biased against an interior surface of a left atrial appendage.
5. The medical device of claim 3 , wherein the concave outer surface and the convex surface of the at least one flange meet proximate the flange lip.
6. The medical device of claim 1 , wherein the device comprises a collapsed configuration in which the distance between the first end and the second end is increased such that the body width and the flange width are reduced, enabling passage of the device through a lumen of a catheter, and wherein the device reverts to the relaxed configuration after removal from the lumen.
7. A medical device according to claim 1 , wherein the device comprises a plurality of strands treated to conform in shape to the relaxed configuration of the device, wherein each strand of the plurality of strands comprises a proximal end and a distal end, wherein at least one of the proximal ends and the distal ends of the plurality of strands are secured at a common endpoint.
8. A medical device according to claim 7 , wherein the plurality of strands are arranged into a fabric.
9. A medical device according to claim 8 , wherein the flange comprises two layers of the fabric.
10. A medical device according to claim 7 , further comprising a clamp attached to the device at the common endpoint.
11. A medical device according to claim 10 , wherein the clamp comprises a thread adapted to rotationally receive a delivery device that comprises complementary threads.
12. A medical device according to claim 1 , wherein the body extends proximally towards the first end past a proximal-most flange of the plurality of flanges.
13. A medical device according to claim 12 , wherein a maximum body width of the body is measured at a location of the body proximal of the proximal-most flange.