Systems and methods for embolization of body structures

A device for treatment of a vascular defect within a patient's vasculature, comprising:

• a shell comprising a braided mesh formed from a plurality of filaments and having a radially compressed configuration and a radially expanded configuration;
• the shell having a proximal end, a distal end, and a longitudinal axis extending through the proximal end and distal end;
• wherein in the radially expanded configuration, the mesh forms a plurality of lobes that each are aligned with the longitudinal axis and that each curve outward from the longitudinal axis to increased resistance to bending;
• wherein each of the plurality of circumferentially-arrayed lobes comprises a first side having a first radius of curvature, a second side having a second radius of curvature, and a central portion between the first side and the second side comprising a third radius of curvature;
• and wherein the third radius of curvature is greater than each of the first radius of curvature and the second radius of curvature.

A device for treatment of a vascular defect within a patient's vasculature, comprising:

• a shell comprising a woven mesh formed from a plurality of filaments and having a radially compressed configuration and a radially expanded configuration;
• the shell having a proximal end, a distal end, and a longitudinal axis extending through the proximal end and distal end;
• the filaments being connected together at the proximal end;
• the proximal end having a detachment device that selectively detaches from a delivery device;
• wherein in the radially expanded configuration, the mesh forms a plurality of lobes that each are aligned with the longitudinal axis and that each curve outward from the longitudinal axis to increased resistance to bending;
• wherein each of the plurality of circumferentially-arrayed lobes comprises a first side having a first radius of curvature, a second side having a second radius of curvature, and a central portion between the first side and the second side comprising a third radius of curvature;
• and wherein the third radius of curvature is greater than each of the first radius of curvature and the second radius of curvature.