Endovascular Catheters with Tuned Control Members and Associated Systems and Methods

摘要

Endovascular catheters and control wires for operating the catheters and associated systems, apparatuses, and methods are disclosed include a catheter apparatus having an elongated shaft, a therapeutic assembly at a distal portion of the shaft, and a handle at a proximal portion of the shaft. An actuator is located at the handle and operably coupled to the therapeutic assembly via a tuned control member extending through the shaft. The tuned control member includes a control wire and a tuning component attached to one another within the shaft. The tuned control member is configured to achieve a desired tuned force-displacement response by modifying the stress-strain response that a non-tuned control wire would ordinarily provide without the intervening tuning component.

主权项

1. A catheter apparatus, comprising:
an elongated tubular shaft having a proximal portion and a distal portion; a therapeutic assembly at the distal portion of the elongated shaft and transformable between a delivery state and a deployed state; a handle coupled to the proximal portion of the shaft; an actuator carried by the handle; and a tuned control member operably coupled between the actuator and the therapeutic assembly, wherein the tuned control member comprises a control wire extending through a lumen in the shaft and a tuning component coupled to the wire, wherein, when subjected to a tensile force—
the control wire alone has a first force/displacement curve having a first superelastic response plateau at a first displacement along the first force/displacement curve,the tuned control member has a second force/displacement curvehaving a second superelastic response plateau at a second displacement along the second force/displacement curve less than the first displacement.