Devices, systems, and methods for the treatment of vascular defects

An occlusive device for treating an aneurysm, wherein a neck of the aneurysm opens to a blood vessel, the device comprising:

• a first elongated mesh strip having a low-profile state for intravascular delivery to the aneurysm and an expanded state in which the first elongated mesh strip is curved about a first axis to form a first band encircling at least a portion of a first opening;
• a second elongated mesh strip having a low-profile state for intravascular delivery to the aneurysm and an expanded state in which the second elongated mesh strip is curved about a second axis to form a second band encircling at least a portion of a second opening, wherein a distal end of the second elongated mesh strip is coupled to a proximal end of the first elongated mesh strip;
• and
• a third elongated mesh strip having a low-profile state for intravascular delivery to the aneurysm and an expanded state in which the third elongated mesh strip is curved about a third axis to form a third band encircling at least a portion of a third opening, wherein a distal end of the third elongated mesh strip is coupled to a proximal end of the second elongated mesh strip;
• wherein, when the device is in an expanded, unconstrained state, the first, second, and third openings are aligned with first, second, and third planes, respectively, and the first second and third planes are perpendicular to one another, and wherein the first strip has a length, and wherein the first elongated mesh strip has a generally constant width along the length.

A method for treating an aneurysm with an occlusive device including a first elongated mesh and a second elongated mesh, wherein a neck of the aneurysm opens to a blood vessel, the method comprising:

• pushing the first elongated mesh distally from a delivery catheter into an interior region of the aneurysm, the first elongated mesh having a length and a generally constant width along the length, wherein pushing the first elongated mesh distally includes curving the first elongated mesh back on itself to form a first band that expands against and conforms to an inner surface of the aneurysm wall;
• pushing a second elongated mesh distally from the delivery catheter into the interior region of the aneurysm, wherein a distal end of the second elongated mesh is coupled to a proximal end of the first elongated mesh, and wherein pushing the second elongated mesh distally includes curving the second elongated mesh back on itself to form a second band that expands against and conforms to the inner surface of the aneurysm wall, wherein the first and second bands intersect at first and second overlap regions when the device is in an expanded state;
• and
• positioning the device within the aneurysm such that the first or second overlap region is positioned at the neck of the aneurysm, thereby substantially covering the neck and reducing blood flow from a parent vessel through the neck.