Patent ID: 11931063
Assignee: MEDTRONIC VASCULAR, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 9:
10. A tissue-removing catheter for removing tissue in a body lumen, the tissue-removing catheter comprising:
an elongate body having an axis and proximal and distal end portions spaced apart from one another along the axis, the elongate body being sized and shaped to be received in the body lumen;
a tissue-removing element mounted on the distal end portion of the elongate body, the tissue-removing element being configured to remove the tissue as the tissue-removing element is rotated by the elongate body within the body lumen;
a motor operatively engaging the elongate body for driving rotation of the elongate body and tissue-removing element mounted on the elongate body; and
a controller operatively connected to the motor and configured to monitor a speed of the motor, the controller deactivating the motor in response to a change in the monitored speed being greater than a predetermined amount for a predetermined period of time, wherein the controller determines the change in the monitored speed by calculating a sum of multiple measured speed changes within the predetermined period of time.