Occlusive implant and methods of making an occlusive fabric having shape memory characteristics

A method of making an occlusive fabric having shape memory characteristics, comprising:

• intertwining a plurality of filaments into an occlusive fabric, wherein the occlusive fabric comprises shape memory characteristics such that the occlusive fabric is configured to shift from a first configuration to a second configuration when exposed to a predetermined stimulus;
• defining a permanent shape of the occlusive fabric in the second configuration;
• and
• heat setting the occlusive fabric in the first configuration, wherein the first configuration defines a temporary shape of the occlusive fabric.

A method of making a shape memory yarn, comprising:

• forming a core filament from a first material comprising a polymer;
• and
• wrapping at least one shape memory filament helically around the core filament, wherein the at least one shape memory filament is formed from a second material comprising a shape memory polymer;
• wherein the at least one shape memory filament is configured to shift from a first configuration to a second configuration when exposed to a predetermined stimulus.