Patent ID: 8434489

Claim:
A system for occluding a tubular body lumen comprising: a deployment sheath; an occlusion device at least partially disposed within the deployment sheath, the occlusion device comprising: an expandable implant having a proximal end and a distal end, wherein a portion of the expandable implant comprises hydrogel; and tissue in-growth promoting agent on the expandable implant, wherein the expandable implant comprises an outer coil, an inner coil, a flexible tip, a distal solder joint connecting the outer coil, inner coil and flexible tip at the distal end and a detachable release joint at the proximal end; and a hydrophobic material at a distal end of the deployment sheath, wherein the distal end of the occlusion device extends beyond the distal end of the deployment sheath while the hydrophobic material protects the hydrogel from swelling upon exposure of the distal end of the deployment sheath to a physiological environment, and the hydrophobic material is pierceable by the occlusion device to deliver the occlusion device through the distal end of the deployment sheath.