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

Claim 8:
9. 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 sensor, wherein the sensor provides 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;
discontinue rotation of the motor if the position signal indicating the home position for the cutting tip drive mechanism is received, and otherwise rotate the motor in a second direction opposite the first direction until the position signal indicating the home position for the cutting tip drive mechanism is received; and
after the position signal indicating that the home position for the cutting tip drive mechanism is received, calibrating cutting tip drive mechanism so that a zero position of the motor corresponds to the current position of the cutting tip drive mechanism.