Controller for an atherectomy device

A method, comprising:

• establishing communications between a controller and an external system, the controller comprising a processor in communication with each of a storage medium, a plurality of inputs, a plurality of outputs, and a data input port;
• configuring the controller for operating an atherectomy device, the device comprising:
• an elongated flexible drive shaft, comprising an abrasive element proximate a distal end thereof;
• and
• an electric motor rotatably coupled with a proximal end of the drive shaft;
• inserting the distal end of the drive shaft into a vasculature;
• positioning the abrasive element proximate a stenosis within the vasculature;
• delivering saline along the drive shaft to the abrasive element by operating a saline pump with the controller;
• rotating the abrasive element by operating the motor with the controller;
• advancing the rotating abrasive element through the stenosis;
• removing at least a portion of plaque at the stenosis with the rotating abrasive element;
• monitoring a cumulative time for which the device is powered on;
• inhibiting the device from being used when the cumulative time equals a threshold;
• monitoring and regulating:
• a rotational speed of the motor between a maximum threshold and a minimum threshold;
• a motor current between a maximum threshold and a minimum threshold;
• a motor voltage between a maximum threshold and a minimum threshold;
• and
• a torque delivered by the motor between a maximum threshold and a minimum threshold;
• and
• detecting a status of the stenosis by monitoring a change in at least one of the rotational speed of the motor, the motor current and the motor voltage.