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Devices and methods for excluding the left atrial appendage

  • US 9,943,315 B2
  • Filed: 03/10/2014
  • Issued: 04/17/2018
  • Est. Priority Date: 03/13/2013
  • Status: Active Grant
First Claim
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1. A left atrial appendage occlusion device, comprising:

  • an expandable, open cell foam body having a proximal end for facing the left atrium following implantation in the left atrial appendage, a distal end for facing into the left atrial appendage following implantation, and a side wall;

    a guidewire lumen extending through the foam body;

    a layer having an inner portion extending from within the guidewire lumen and an outer portion everting out around the proximal end of the foam body to form a seamless proximal face for facing the left atrium and continuing over an outer side of the side wall and at least partially over the distal end of the foam body, with a first end of the inner portion of the layer disposed distally of the distal end of the foam body and concentrically within a second end of the outer portion of the layer, with the first end and the second end connected together with an attachment structure;

    wherein the foam body can be compressed within a delivery catheter having an inside diameter of no more than about 20F and can self-expand to a diameter of at least about 25 mm when released from the delivery catheter; and

    wherein the outer portion of the layer has at least one opening to permit contact of left atrial appendage tissue with the foam body to permit tissue ingrowth into the foam body.

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