A device (700, 900, 1400) for removing an occlusion within a biological vasculature, comprising: a treatment portion (100, 200, 400, 500) coupled with a delivery wire, said treatment portion comprising: a substantially cylindrical, self-expandable cage capable of being shifted between a compact delivery configuration and an expanded treatment configuration; wherein said self-expandable cage comprises a plurality of interconnected, elongate-rectangular, twisted cage struts (122, 124) configured to form a series of substantially diamond-shaped repeat units along a long axis of said cage in said expanded treatment configuration; wherein intersecting corners of said diamond-shaped repeat units are configured to capturingly engage a portion of said occlusion for removal from said biological vasculature; wherein when said cage is in said expanded configuration, proximal and distal end portions of said cage converge inwardly to form substantially close-ended proximal and distal cage end portions respectively; wherein a hollow catheter configured for housing said treatment portion and said delivery wire, and delivering said treatment portion in said delivery configuration to an occlusion site within said biological vasculature; and wherein the treatment portion is coupled with a distal portion of the delivery wire; characterized in that the delivery wire includes a bulbous terminal portion configured to prevent the treatment portion (100, 200, 400, 500) from being removed from the delivery wire. a treatment portion (100, 200, 400, 500) coupled with a delivery wire, said treatment portion comprising: a substantially cylindrical, self-expandable cage capable of being shifted between a compact delivery configuration and an expanded treatment configuration; wherein said self-expandable cage comprises a plurality of interconnected, elongate-rectangular, twisted cage struts (122, 124) configured to form a series of substantially diamond-shaped repeat units along a long axis of said cage in said expanded treatment configuration; wherein intersecting corners of said diamond-shaped repeat units are configured to capturingly engage a portion of said occlusion for removal from said biological vasculature; wherein when said cage is in said expanded configuration, proximal and distal end portions of said cage converge inwardly to form substantially close-ended proximal and distal cage end portions respectively; a substantially cylindrical, self-expandable cage capable of being shifted between a compact delivery configuration and an expanded treatment configuration; wherein said self-expandable cage comprises a plurality of interconnected, elongate-rectangular, twisted cage struts (122, 124) configured to form a series of substantially diamond-shaped repeat units along a long axis of said cage in said expanded treatment configuration; wherein intersecting corners of said diamond-shaped repeat units are configured to capturingly engage a portion of said occlusion for removal from said biological vasculature; wherein when said cage is in said expanded configuration, proximal and distal end portions of said cage converge inwardly to form substantially close-ended proximal and distal cage end portions respectively; wherein a hollow catheter configured for housing said treatment portion and said delivery wire, and delivering said treatment portion in said delivery configuration to an occlusion site within said biological vasculature; and wherein the treatment portion is coupled with a distal portion of the delivery wire; characterized in that the delivery wire includes a bulbous terminal portion configured to prevent the treatment portion (100, 200, 400, 500) from being removed from the delivery wire.