A retrieval device for removing clots is provided that includes a shaft carrying an expandable cage. The expandable cage includes a plurality of struts, each strut including proximal and distal ends coupled to non-expandable sections of the shaft distal end and an intermediate region that expands from a collapsed configuration to an expanded configuration. The struts have radial surfaces extending in a radial direction and outer circumferential surfaces in the collapsed configuration, and the intermediate regions of the struts are configured to twist along their lengths when expanded to the expanded configuration, e.g., such that the radial surfaces become oriented substantially circumferentially and the outer surfaces become oriented substantially radially.
