An intravascular catheter device for the treatment of atherosclerotic material located within a blood vessel comprising: a flexible catheter tube ; a handle assembly secured to a proximal end of said catheter tube and comprising a control member that is moveably supported thereon; an expandable portion secured to a distal end of said catheter tube and comprising a plurality of struts each defining an outward facing surface, the expandable portion being operable between a closed position, wherein the expandable portion has a first diameter, and an opened position, wherein the expandable portion has a second diameter that is larger than the first diameter; an inner sleeve disposed within the catheter tube wherein said inner sleeve is supported for sliding movement within the catheter tube , is configured to accommodate a guide wire , and is connected between the control member and a distal end of the expandable portion such that the inner sleeve is configured to move the expandable portion between the opened and the closed positions; a tip member forming the distal end of the expandable portion and attached to the inner sleeve 140, 240, 340) and the struts so as to move the struts between the closed position and the opened position when the tip member is extended or retracted relative to the catheter tube ; an incising element provided on and extending from the outward facing surface of at least one of the struts , the incising element having a sharpened edge located along an upper edge thereof wherein said sharpened edge extends in parallel with a longitudinal axis of the expandable portion when the expandable portion is in the closed position; characterised in that an abrasive surface located on at least one of the struts is configured to abrade atherosclerotic material by axial movement of the expandable portion through the blood vessel while the expandable portion is in the opened position. a flexible catheter tube ; a handle assembly secured to a proximal end of said catheter tube and comprising a control member that is moveably supported thereon; an expandable portion secured to a distal end of said catheter tube and comprising a plurality of struts each defining an outward facing surface, the expandable portion being operable between a closed position, wherein the expandable portion has a first diameter, and an opened position, wherein the expandable portion has a second diameter that is larger than the first diameter; an inner sleeve disposed within the catheter tube wherein said inner sleeve is supported for sliding movement within the catheter tube , is configured to accommodate a guide wire , and is connected between the control member and a distal end of the expandable portion such that the inner sleeve is configured to move the expandable portion between the opened and the closed positions; a tip member forming the distal end of the expandable portion and attached to the inner sleeve 140, 240, 340) and the struts so as to move the struts between the closed position and the opened position when the tip member is extended or retracted relative to the catheter tube ; an incising element provided on and extending from the outward facing surface of at least one of the struts , the incising element having a sharpened edge located along an upper edge thereof wherein said sharpened edge extends in parallel with a longitudinal axis of the expandable portion when the expandable portion is in the closed position; characterised in that an abrasive surface located on at least one of the struts is configured to abrade atherosclerotic material by axial movement of the expandable portion through the blood vessel while the expandable portion is in the opened position. <EOS>