An intravascular catheter device (10) for treating a zone of attention located within a blood vessel (50) comprising atherosclerotic material (54), said device (10) comprising:a flexible catheter tube (30, 130, 230, 330)；an expandable portion (32, 132, 232, 332) secured to a distal end of said catheter tube (30, 130, 230, 330) and comprising a plurality of struts (34A, 34B, 134A, 134B, 134C, 134D, 234A, 234B, 334A, 334B) each defining an outward facing surface, the expandable portion (32, 132, 232, 332) being operable between a closed position, wherein the expandable portion (32, 132, 232, 332) has a first diameter, and an opened position, wherein the expandable portion (32, 132, 232, 332) has a second diameter that is larger than the first diameter； anda grating tool (144, 244, 344) located on at least one of the struts (34A, 34B, 134A, 134B, 134C, 134D, 234A, 234B, 334A, 334B), wherein said grating tool (144, 244, 334) is configured to remove atherosclerotic material (54) when the expandable portion (32, 132, 232, 332) is placed in the opened position and moved axially through the blood vessel (50).
