Intravascular imaging catheter system with force error detection and automatic remediation via pullback and rotation
AssigneeInfraReDx, Inc.
InventorsDavid Barone, Todd Bitner, John N. Beck
Life of this patent
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Abstract
An intravascular imaging system includes a catheter with an elongate outer sheath and a torque cable axially translatable and rotatable in the elongate outer sheath, a pullback and rotation unit for axially translating and rotating the torque cable, a sensor configured to provide an output indicative of an axial force exerted by the torque cable on a rotor in the pullback and rotation unit, and a controller configured to cause the pullback and rotation unit to operate in a remedial mode if the output exceeds a predetermined threshold.
Claims10
A pullback and rotation unit for axially translating and rotating a torque cable in an elongate outer sheath of a catheter, the pullback and rotation unit comprising:
- a housing with a longitudinal axis;
- a rotor disposed in the housing and mounted to rotate and linearly translate relative to the longitudinal axis of the housing, the rotor further being configured to be coupled with a proximal end of the torque cable;
- at least one sensor provided on the rotor and configured to provide an output indicative of an axial force exerted by the torque cable on the rotor;
- wherein the rotor includes a main body and a coupling mounted on the main body of the rotor, wherein the coupling is configured to couple with the proximal end of the torque cable, and wherein the at least one sensor is mounted between the coupling and the main body of the rotor;
- wherein the coupling is mounted to be movable longitudinally relative to the main body of the rotor;
- and
- a controller configured to, when the output exceeds a predetermined threshold, cause the rotor to automatically perform a remedial action to relieve at least a portion of the axial force, wherein the controller is configured to cause the rotor, when performing the remedial action, to retract proximally a predetermined distance.
Dependencies are inferred from the claim text.