Uncoupled LAA device
A medical device for treating an LAA is presented. The device includes a cap, a bulb and a joint assembly therebetween. The cap is a three layer mesh structure with a retaining hub securing the layers together. A plurality of proximal wire loops extend from the base layer to a proximal post of the joint assembly. The bulb has a plurality of distal wire loops that extend between a terminal post and a distal post of the joint assembly. The joint assembly comprises a first ball joint, a second ball joint and a housing. Each ball joint is retained in the housing independent ball and socket relationships. Each ball joint and post defines a longitudinal axis. The housing defines a housing longitudinal axis. By way of the ball and socket relationship each ball joint longitudinal axis may form an angle of between about 0 to about 35 degrees with the housing longitudinal axis in any direction.
1. A medical device to treat the LAA, the medical device having a deployed state and a confined state, the medical device comprising:
a cap, a bulb and a joint assembly therebetween;
the cap having a plurality of layers, the plurality of layers comprising a base layer, a petal layer and a securement layer, the securement layer being immediately adjacent to an engagement hub, a portion of the engagement hub extending through an opening defined by each of the layers to secure each of the layers to one another to form the cap, a plurality of proximal wire loops extending from the cap to a proximal post of the joint assembly;
the bulb having a plurality of distal wire loops that extend between a terminal post and a distal post of the joint assembly, adjacent distal wire loops being connected one to another by at least one connection collar;
the joint assembly comprising a first ball joint, a second ball joint and a housing, the proximal post extending proximally from the first ball joint, the distal post extending distally from the second ball joint, the housing having a proximal collar and a distal collar, the proximal collar retaining the first ball joint in a first ball and socket relationship, the distal collar retaining the second ball joint in a second ball and socket relationship;
the housing having a housing longitudinal axis extending therethrough, a proximal longitudinal axis extending through the first ball joint and the proximal post, a distal longitudinal axis extending through the second ball joint and the distal post, the first ball and socket relationship allowing the proximal longitudinal axis to form an angle of between about 0 to about 35 degrees with the housing longitudinal axis in any direction, the second ball and socket relationship allowing the distal longitudinal axis to form an angle of between about 0 to about 35 degrees with the housing longitudinal axis in any direction.
2. The medical device of claim 1 wherein in the confined state the device is folded into the interior of a delivery catheter.
3. The medical device of claim 2 wherein the distal wire loops of the bulb are constructed and arranged to self-expand from the confined state to the deployed state within an LAA, the bulb having a diameter, in the deployed state the diameter of the bulb being greater than the diameter in the confined state.
4. The medical device of claim 3 , wherein in the deployed state the bulb does not distort the inherent shape of the LAA.
5. The medical device of claim 3 wherein the distal wire loops are constructed of a plurality of strands of shape memory material.
6. The medical device of claim 5 wherein the shape memory material is nitinol.
7. The medical device of claim 3 wherein at least some of the distal wire loops include barbs, the barbs constructed and arranged to engage tissue of the LAA when the bulb is in the deployed state.
8. The medical device of claim 1 wherein the LAA defines an ostium, in the deployed state the cap extending across and completely covering the ostium.
9. The medical device of claim 1 wherein the base layer is constructed of a mesh material, the base layer comprising at least two sections of mesh material immediately adjacent to one another.
10. The medical device of claim 9 wherein the petal layer is comprised of a plurality of continuous and overlapping petals of a mesh material, the mesh material of the petal layer being the same or different than the mesh material of the base layer.