Patent ID: 9138307
Filing Date: 2015-09-22
Classification: A61B,A61F,A61M

Abstract:
1. An assembly for treatment of a stricture in a body vessel, the assembly comprising: an inner catheter having a tubular body portion; an outer catheter having a distal end through which the inner catheter is disposed for deployment in the body vessel; and an expandable device coaxially disposed within the inner catheter for treatment of the stricture in the body vessel, the device comprising: a tubular portion including a proximal end and a distal end extending from the proximal end, the tubular portion having a lumen formed therethrough between the proximal and distal ends, the tubular portion having a longitudinal axis, wherein the tubular portion maintains flexibility as it is disposed through a tortuous body vessel; and an expandable member formed helically about the tubular portion in a plurality of member portions arranged in continuous windings, the expandable member formed integrally with the tubular portion, the expandable member being configured to helically close, defining a collapsed state for delivery of the device, the expandable member being configured to helically open, defining an expanded state, in which the expandable member forms an outermost periphery of the expandable device, for treatment of the stenotic lesion in the body vessel, the plurality of member portions helically extending from the tubular portion at a predetermined angle at the outermost periphery defining a proximally faced opening having a concave shape with the predetermined angle forming a greater opening angle than an opening angle adjacent the tubular member when the expandable member is in the expanded state, the predetermined angle being between about 40 and 70 degrees, the plurality of member portions having a solid one-piece construction.