Occlusive medical device with fixation members

1. An occlusive implant, comprising:

an expandable framework configured to shift between a collapsed configuration and an expanded configuration, wherein the expandable framework includes a plurality of strut members circumferentially spaced around a longitudinal axis of the expandable framework,

wherein in the collapsed configuration, the plurality of strut members of the expandable framework is free of twists,

wherein in the expanded configuration one or more of the plurality of strut members includes a first twisted portion, a second twisted portion, and a face portion,

wherein the face portion is positioned between the first twisted portion and the second twisted portion;

a plurality of fixation members directed radially away from a longitudinal axis of the expandable framework and disposed along each face portion of one or more of the plurality of strut members; and

a transverse portion of an occlusive member disposed over a proximal region of the expandable framework,

wherein in the collapsed configuration, a first plurality of fixation members disposed along one face portion are longitudinally offset and circumferentially interdigitated with a second plurality of fixation members disposed along an adjacent second face portion.

2. The occlusive implant of claim 1 , wherein the expandable framework comprises a shape-memory material.

3. The occlusive implant of claim 1 , wherein in the expanded configuration, the expandable framework defines an enclosed volume.