SUPPORT CATHETERS FOR USE IN CROSSING AND TREATING AN OCCLUSION

摘要

A device and method for treating a patient with total or near total occlusion is provided. The device can be positioned in a blood vessel at a treatment site. An occlusion at the treatment site is enlarged by a catheter. The catheter can be advanced over a guidewire into the occlusion. One or more of [a] compression or torsion applied to the guidewire or [b] compression or torsion applied to the catheter body expands or creates a path through the occlusion. The expansions or creation of the access path can be by cutting or abrading the occlusion or by a shoe-horn effect.

主权项

1. A support catheter, comprising:
a proximal portion to be disposed outside a patient in use; a distal portion to be advanced from outside a patient to a proximal face of an occlusion; an elongate body extending between the proximal portion and the distal portion, the elongate body having a lumen extending therethrough with an inner diameter configured for sliding and supporting interaction with a guidewire, the elongate body being sufficiently stiff to transmit torque applied to the proximal end 1:1 to the distal end; a rigid ring disposed at the distal portion, the rigid ring having a occlusion reducing feature disposed at a distal end thereof, a side surface juxtaposed with a distal end of the elongate body; an interface disposed between the elongate body and rigid ring, the interface comprising at least one opening disposed in the rigid ring and a radial projection extending into the opening such that the projection is axially overlapping with at least a portion of the opening; and a handle coupled with the proximal portion; wherein the support catheter is configured such that rotation or translation of the handle is transmitted to the occlusion at least partially along or through the interface.