Robotic catheter systems and methods
First Claim
1. A method of controlling a robotic instrument system, the system comprising an elongate sheath instrument and an elongate catheter instrument positioned within a working lumen of the sheath instrument, the method comprising:
- operating an instrument driver coupled to the catheter instrument to place a control element extending through the catheter instrument in tension, and thereby articulate at least a distal end portion the catheter instrument; and
automatically compensating for a torsional force exerted on the sheath instrument in a first direction due to articulation of the distal end portion of the catheter, by urging the sheath instrument to twist in a second direction opposite of the first direction.
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Accused Products
Abstract
A robotic instrument system having an elongate sheath instrument and an elongate catheter instrument positioned within a working lumen of the sheath instrument is controlled by selectively operating an instrument driver coupled to the catheter instrument to place a control element extending through the catheter instrument in tension, and thereby articulate at least a distal end portion the catheter instrument, while automatically compensating for a torsional force exerted on the sheath instrument in a first direction due to articulation of the distal end portion of the catheter, by urging the sheath instrument to twist in a second direction opposite of the first direction.
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Citations
11 Claims
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1. A method of controlling a robotic instrument system, the system comprising an elongate sheath instrument and an elongate catheter instrument positioned within a working lumen of the sheath instrument, the method comprising:
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operating an instrument driver coupled to the catheter instrument to place a control element extending through the catheter instrument in tension, and thereby articulate at least a distal end portion the catheter instrument; and automatically compensating for a torsional force exerted on the sheath instrument in a first direction due to articulation of the distal end portion of the catheter, by urging the sheath instrument to twist in a second direction opposite of the first direction. - View Dependent Claims (2, 3, 4)
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5. A robotically controlled medical instrument system, comprising:
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a controller; an instrument driver operatively coupled to the controller; a sheath instrument operatively coupled to the instrument driver; and a catheter instrument operatively coupled to the instrument driver, wherein the catheter instrument is positioned in a working lumen of the sheath instrument, the catheter instrument having a control element extending there through for controllably articulating a distal end portion of the catheter instrument, wherein placing the control element in tension places a torsional force on the sheath instrument that urges the sheath instrument to twist in a first direction, and wherein the controller is configured to automatically compensate for the torsional force exerted on the sheath instrument by urging the sheath instrument to twist in a second direction opposite of the first direction through selected operation of the instrument driver. - View Dependent Claims (6)
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7. A method of controlling a robotic instrument system, the system comprising an elongate flexible sheath instrument and an elongate flexible catheter instrument positioned within a working lumen of the sheath instrument, the method comprising:
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determining a length of a distal end portion of the catheter instrument that extends beyond a distal end opening of the sheath instrument; and selectively actuating one or more motors in an instrument driver to thereby cause articulation of a distal end portion of the catheter instrument extending through a distal end opening of the sheath instrument, wherein actuation of the motors is based at least in part on the determined length so that the resulting articulation of the distal end portion of the catheter instrument is scaled. - View Dependent Claims (8, 9, 10, 11)
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Specification