Catheter apparatus to control torque
AssigneeCanon U.S.A., Inc.
InventorsMark Alan Hamm, Albert Harold Dunfee, Badr Elmaanaoui
Life of this patent
Estimating the term…
Abstract
An apparatus includes an elongate member having proximal and distal portions; a rotatable drive cable disposed within the elongate member, the drive cable being connectable to a mechanism to which torque can be applied; and a control assembly mechanically coupled to the drive cable, and configured to disengage the mechanism from the drive cable when the applied torque exceeds a predetermined level, wherein disengagement of the mechanism from the drive cable causes rotation of the drive cable to stop or withdrawal of the drive cable.
Claims18
An apparatus comprising:
- an elongate member having proximal and distal portions;
- a rotatable drive cable disposed within the elongate member, the drive cable being connectable to a mechanism which applies torque;
- and
- a control assembly mechanically coupled to the drive cable, and configured to disengage the mechanism from the drive cable when the applied torque exceeds a predetermined level,
- wherein disengagement of the mechanism from the drive cable causes rotation of the drive cable to stop or withdrawal of the drive cable;
- and
- a short linear segment where the drive cable passes through an unsupported gap within a predetermined length range so the drive cable can wind up in the unsupported gap and be withdrawn from a site of complication or entanglement.
A method comprising:
- inserting, into a subject, an elongate member having proximal and distal portions, and a rotatable drive cable disposed within the elongate member, the drive cable being connected to a mechanism to which torque can be applied, and being mechanically coupled to a control assembly;
- and
- applying torque to the control assembly, wherein the mechanism will disengage from the drive cable when the applied torque exceeds a predetermined level, and
- wherein disengagement of the mechanism from the drive cable causes rotation of the drive cable to stop or withdrawal of the drive cable;
- wherein the drive cable winds up in an unsupported gap such that the drive cable is withdrawn from a site of complication or entanglement.
A system comprising:
- an imaging device;
- a display;
- a controller;
- and
- an apparatus comprising:
- an elongate member having proximal and distal portions;
- a rotatable drive cable disposed within the elongate member, the drive cable being connectable to a mechanism to which torque can be applied;
- and
- a short linear segment where the drive cable passes through an unsupported gap within a predetermined length range;
- and
- a control assembly mechanically coupled to the drive cable, and configured to disengage the mechanism from the drive cable when the applied torque exceeds a predetermined level,
- wherein disengagement of the mechanism from the drive cable causes rotation of the drive cable to stop or withdrawal of the drive cable, and wherein the drive cable can wind up in the unsupported gap and be withdrawn from a site of complication or entanglement.
Dependencies are inferred from the claim text.