A surgical apparatus for removing deposits from an interior of a vessel (V) including an outer member (20) and a rotatable shaft (22) positioned for rotational movement within the outer member, the rotatable shaft having a lumen (36) extending therethrough dimensioned to receive a guidewire (G) and a distal opening communicating with the lumen, the lumen having a cross-sectional dimension to enable fluid injection between an inner diameter of the roatatble shaft and an outer diameter of the guidewire. A rotatable tip (30, 30') having a longitudinal axis is mounted to the rotatable shaft for rotation about its longitudinal axis upon rotation of the rotatable shaft, the rotatable tip mounted to a distal portion of the rotatable shaft such that the distal opening of the rotatable shaft is axially spaced from a distal internal surface of the rotatable tip such that fluid injected through the lumen of the rotatable shaft contacts the distal internal surface of the rotatable tip and is redirected proximally to direct in a proximal direction deposits removed by the rotational movement of the rotatable tip. The rotatable tip includes a guidewire lumen for receiving a guidewire to enable over the wire insertion of the apparatus.
