Retractable drug delivery system and method

摘要

A system for treating a vascular condition includes a catheter having an inner member and an outer member, the outer member concentrically arranged about the inner member and a retractable drug delivery device disposed at a distal end of the inner member. A coating disposed on at least a portion of an outer surface of the retractable drug delivery device includes at least one therapeutic agent.

主权项

1. A system for treating a vascular condition, the system comprising:
a catheter including an inner member and an outer member, the outer member being concentrically arranged and slideably disposed about the inner member; a retractable drug delivery device disposed around a distal end of the inner member extending through the retractable drug delivery device, the retractable drug delivery device comprising a plurality of scaffold struts and a plurality of transition struts extending from the plurality of scaffold struts, wherein the scaffold struts of the retractable drug delivery are configured to expand radially from the inner member forming an open passageway wherein the distal end of the scaffold struts are unattached to the inner member; an attachment, wherein proximal ends of the plurality of transition struts are secured to the attachment and wherein the attachment is formed integrally with the inner member; a coating disposed on at least a portion of an outer surface of the retractable drug delivery device; and in at least one therapeutic agent within the coating; wherein the inner member and the outer member are operable to collapse the retractable drug delivery device from an expanded configuration to a compressed configuration about the inner member within the outer member when the inner member is moved slideably relative to the outer member.