Patent ID: 11864789
Assignee: THE SPECTRANETICS CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 13:
14. A device for removing an implanted object from a body vessel, the device comprising:
a sheath comprising a cutting tip having a cutting surface;
a cutting tip drive mechanism comprising a motor configured to rotate the cutting tip, wherein, upon actuation of the motor, the cutting tip rotates and translates longitudinally within the sheath;
a current sensor configured to provide an alert signal when a motor current exceeds a threshold;
a sensor configured to provide a position signal indicating that the cutting tip drive mechanism is in a home position within the sheath; and
a controller comprising a non-transitory computer-readable medium comprising instructions that, when executed, cause the controller to:
rotate the motor in a first direction until either the position signal is received from the sensor or the alert signal is received from the current sensor;
if the alert signal from the current sensor is received, rotate the motor in a second direction opposite the first direction until the position signal is received from the sensor; and
after the position signal indicating that the home position for the cutting tip drive mechanism is received from the sensor, calibrating the cutting tip drive mechanism so that a zero position of the motor corresponds to the current position of the cutting tip drive mechanism.