Abstract: A rotational atherectomy device for cutting or abrading tissue. The atherectomy device comprises a rotatable drive shaft (120) having a longitudinal axis and comprising one or more internal guiding tracks (121) extending along the length of the drive shaft (120). The rotational atherectomy device further comprises one or more flexible shafts (111, 113) arranged to be longitudinally moveable along a respective internal guiding track, and an abrasive head (110) disposed at the distal end of the one or more flexible shafts (111, 113). The abrasive head (110) comprises one or more abrasive elements (111), each abrasive element connected to a respective flexible shaft (111, 113). The one or more guiding tracks (121) are arranged such that distal movement of the one or more flexible shafts (111, 113) causes the abrasive head (110) to move from a radially contracted configuration to a radially expanded configuration.

Abstract: A control handle for an atherectomy device comprising a housing and a drive module for rotating an abrasive head of the atherectomy device. The drive module is moveable relative to the housing in a longitudinal stroke motion. The control handle further comprises a rotary indexing mechanism connected to the drive module. The rotary indexing mechanism is configured to rotate the drive module by a pre-determined amount after a longitudinal stroke.