Devices for therapeutic vascular procedures

A device for treatment of an aneurysm within a patient's vasculature, comprising:

• a distal self-expanding resilient permeable shell having a proximal end, a distal end, and a longitudinal axis, the distal permeable shell comprising a first plurality of elongate resilient filaments having a braided structure with a plurality of openings formed between the braided filaments, wherein the first plurality of filaments are gathered at least at the proximal end thereof, wherein the distal permeable shell has a radially constrained elongated state configured for delivery within a microcatheter and an expanded state with an axially shortened configuration relative to the radially constrained state, wherein the expanded state of the distal permeable shell has a convex shape at the distal end of the distal permeable shell;
• a proximal self-expanding resilient permeable shell having a proximal end, a distal end, and a longitudinal axis, the proximal permeable shell comprising a second plurality of elongate resilient filaments having a braided structure with a plurality of openings formed between the braided filaments, wherein the second plurality of filaments are gathered at least at the proximal end thereof, wherein the proximal permeable shell has a radially constrained elongated state configured for delivery within the microcatheter and an expanded state with an axially shortened configuration relative to the radially constrained state, wherein the expanded state of the proximal permeable shell has an outer surface with a generally convex shape at the proximal end of the proximal permeable shell;
• and
• a rigid support means to maintain a longitudinal axis of the expanded state of the distal permeable shell at a fixed angle to a longitudinal axis of the expanded state of the proximal permeable shell,
• wherein the expanded states of the distal and proximal permeable shells define a toroidal cavity through which the rigid support means extends, and wherein at least a portion of a proximal-most surface of the expanded state of the distal permeable shell is in contact with at least a portion of a distal-most surface of the expanded state of the proximal permeable shell.