Atherectomy system with anterograde and retrograde ablation

An atherectomy system, comprising:

• an advancer assembly;
• a drive assembly adapted to translate relative to the advancer assembly;
• a control knob extending from the drive assembly such that translating the control knob results in the drive assembly translating relative to the advancer assembly;
• a drive shaft operably coupled with the drive assembly, the drive shaft translating relative to the advancer assembly as the drive assembly translates relative to the advancer assembly;
• and
• a feedback modifier operably coupled between the drive assembly and the advancer assembly, the feedback modifier adapted to provide a user of the atherectomy system with similar feedback via the control knob regardless of whether the user is moving the drive assembly in an anterograde ablation direction or a retrograde ablation direction;
• wherein the feedback modifier comprises:
• an electro hydraulic coupler having hydraulic fluid that can pass through an orifice having an adjustable diameter;
• a sensor adapted to provide a condition signal indicative of a current driveshaft condition;
• and an electro hydraulic controller operably coupled with the sensor and the electro hydraulic coupler, the electro hydraulic controller adapted to provide an instruction signal, based at least upon the condition signal, to the electro hydraulic coupler to adjust the diameter of the orifice to modify a force felt by the user.