Devices and methods for the treatment of vascular defects

An apparatus, comprising:

• a first porous member having a first end and a second end, the first porous member having a collapsed configuration for insertion through a blood vessel, the first porous member being substantially elongate and having a first width in its collapsed configuration, the first porous member having an expanded configuration for occupying a sac of an aneurysm, the first porous member having a second width in its expanded configuration, the second width greater than the first width;
• and
• a second porous member having a first end and a second end, the second porous member coupled to the first porous member, the second porous member having a collapsed configuration for insertion through the blood vessel, the second porous member being substantially elongate and having a third width in its collapsed configuration, the second porous member having an expanded configuration for occupying the sac of the aneurysm, the second porous member having a fourth width in its expanded configuration, the fourth width greater than the third width.

A method, comprising:

• positioning a distal portion of a catheter adjacent an aneurysm of a blood vessel, the catheter defining an elongate lumen;
• moving an expandable implant from a first position inside the catheter to a second position outside the catheter, the expandable implant including a first portion and a second portion, each of the first portion and the second portion having a first configuration when in the first position and a second configuration when in the second position, in the second configuration the first portion substantially overlaps the second portion.

An apparatus, comprising:

• a first porous member having a first end and a second end, the first porous member having a collapsed configuration for insertion through a blood vessel, the first porous member being substantially elongate in its collapsed configuration, the first porous member having an expanded configuration for occupying a sac of an aneurysm, the first porous member in its expanded configuration having a three-dimensional shape including a first segment configured to overlap with a second segment and defining an interior region;
• and
• a second porous member having a first end and a second end, the second porous member having a collapsed configuration for insertion through the blood vessel, the second porous member being substantially elongate in its collapsed configuration, the second porous member having an expanded configuration for occupying the sac of the aneurysm, the second porous member configured to be disposed in the interior region of the first porous member when each of the first porous member and the second porous member are in their expanded configurations.