Atherectomy devices and methods

A rotational atherectomy apparatus comprising:

• a torque-transmitting coil slidably and rotatably disposed within a lumen of a sheath such that at least one eccentric diamond-coated element fixedly mounted to a distal end portion of the torque-transmitting coil is positioned distally of a distal end of the sheath;
• and
• a rotational atherectomy control handle configured to control rotation of the torque-transmitting coil, including:
• a handle housing having a front housing portion coupled to the sheath and a rear housing portion, the handle housing containing a slidable carriage that is coupled with the torque-transmitting coil, the slidable carriage being slidably translatable in a longitudinal direction relative to both the front housing portion of the handle housing and the sheath so as to longitudinally translate the torque-transmitting coil relative to both the front housing portion of the handle housing and the sheath;
• a user interface button configured to activate rotation of the torque-transmitting coil and being mounted with the slidable carriage such that both the user interface button and the slidable carriage are simultaneously translatable in the longitudinal direction while the user interface button is accessible along the upper side of the handle housing;
• a carriage lock actuator that is movable relative to the handle housing and is configured to releasably lock the slidable carriage in a locked position relative to the handle housing;
• a guidewire access port positioned at the rear housing portion of the handle housing;
• and
• a fluid delivery tube extending from the front housing portion of the handle housing at a location distal of the user interface button and proximal of the sheath, wherein the fluid delivery tube is in fluid communication with the lumen of the sheath.