Atherectomy motor control system
AssigneeBoston Scientific Scimed, Inc.
InventorsCorydon Carlson, David Gordon Spangler, Daniel Frank Massimini, Laszlo Trent Farago
Life of this patent
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Abstract
An atherectomy system includes a drive mechanism that is adapted to rotatably actuate an atherectomy burr and a controller that is adapted to regulate operation of the drive mechanism. In some cases, the drive mechanism includes a drive cable that is coupled with the atherectomy burr and an electric drive motor that is adapted to rotate the drive cable. The controller is adapted to regulate operation of the electric drive motor such that the drive mechanism emulates one or more performance parameters of an air turbine.
Claims17
An atherectomy system, comprising:
- an electric drive mechanism adapted to rotatably actuate an atherectomy burr, the electric drive mechanism including:
- a drive cable coupled with the atherectomy burr;
- and
- an electric drive motor adapted to rotate the drive cable;
- and
- a controller adapted to regulate operation of the electric drive mechanism such that the electric drive mechanism emulates one or more performance characteristics of an air turbine including the torque versus speed performance characteristic of an air turbine.
An atherectomy system, comprising:
- a drive mechanism adapted to rotatably actuate an atherectomy burr, the electric drive mechanism including:
- a drive cable coupled with the atherectomy burr;
- and
- an electric drive motor adapted to rotate the drive cable;
- and
- a control system adapted to regulate operation of the drive mechanism, the control system including:
- a reference block for providing a speed reference value;
- and
- a controller operably coupled to the reference block for receiving the speed reference value, the controller adapted to utilize the speed reference value, a Proportional (P) gain value, an Integral (I) gain value, a Derivative (D) gain value and a K offset value in determining an output signal for the drive mechanism;
- wherein the controller is further adapted to initiate actuation of the drive mechanism using an initial value for the I gain value and a value of zero for the K offset value;
- wherein the controller is further adapted to reduce the I gain value and calculate a non-zero value for the K offset value once a speed of the drive mechanism reaches the speed reference value;
- and
- wherein the controller is further adapted to regulate operation of the electric drive mechanism such that the electric drive mechanism emulates the torque versus speed performance characteristic of an air turbine.
An atherectomy system, comprising:
- an electric drive motor adapted to actuate an atherectomy burr;
- and
- a controller adapted to regulate operation of the electric drive motor, the controller adapted to utilize a speed reference value, a Proportional (P) gain value, an Integral (I) gain value, a Derivative (D) gain value and a K offset value in determining an output signal for the electric drive motor in order to emulate the torque versus speed performance characteristic of an air turbine.
Dependencies are inferred from the claim text.