METHOD AND SYSTEM FOR REVERSIBLY CONTROLLED DRILLING OF LUMINAL OCCLUSIONS
First Claim
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1. A method for advancing an elongate member across an occlusion in a body lumen, said method comprising:
- advancing a distal end of the elongate member into the occlusion;
rotating a drive shaft having a drill tip extending distally from the distal end of the elongate member in one direction as the elongate member is advanced into the occlusion;
measuring a rotational load on the drive shaft; and
reversing the rotational direction of the drive shaft whenever the measured load meets or exceeds a threshold value.
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Abstract
A luminal drilling system includes a drilling device and a control unit. The drilling device includes an elongate member having a drive shaft with a drill tip. The control unit includes a motor connectable to the drive shaft and control circuitry which rotationally oscillates the drive shaft with the direction of rotation automatically reversing whenever the load on the motor and/or drive shaft exceeds a threshold value.
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Citations
26 Claims
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1. A method for advancing an elongate member across an occlusion in a body lumen, said method comprising:
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advancing a distal end of the elongate member into the occlusion; rotating a drive shaft having a drill tip extending distally from the distal end of the elongate member in one direction as the elongate member is advanced into the occlusion; measuring a rotational load on the drive shaft; and reversing the rotational direction of the drive shaft whenever the measured load meets or exceeds a threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A luminal drilling system comprising:
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a rotational penetrating device including an elongate member, and a drive shaft extending through said member and having a drill tip which emerges distally from a distal end of the drilling device; a motor connectable to a proximal portion of the drive shaft to rotational drive the drive shaft; a load sensor coupled to the motor or to the drive shaft, wherein the sensor produces an output signal which is representative of the rotational load on the drill tip as said tip is rotated and advanced through occlusive material in a body lumen; motor control circuitry which reverses the direction of rotation of the motor when the sensed rotational load meets or exceeds a threshold value. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A rotational driver for a luminal rotational penetrating device which includes an elongate body and a drive shaft extending through said body and having a drill tip which emerges distally from a distal end of the elongate body, the driver comprising:
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a motor adapted to rotational drive the drive shaft; a load sensor coupled to the motor or to the drive shaft, wherein said sensor produces an output signal which is representative of the rotational load on the drill tip as said tip is rotated and advanced through occlusive material in a body lumen; and motor control circuitry which reverses the direction of rotation of the motor when the sensed rotational load meets or exceeds a threshold value. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification