BIFURCATION STENT AND BALLOON ASSEMBLIES
First Claim
1. A bifurcated stent having an unexpanded state and an expanded state, the stent constructed of a plurality of interconnected stent members, the stent comprising:
- a generally tubular first body defining a first lumen, the first body having a side opening bounded by a perimeter with an area, a distal region distal to the side opening and having a diameter, a proximal region proximal to the side opening and having a diameter, and a medial region between the distal and proximal regions which defines the side opening, the area of the perimeter defines an opening plane; and
a second body comprising at least one projecting member, the second body in the unexpanded state being positioned substantially within the opening plane;
when in the expanded state, the distal region diameter and proximal region diameter have different sizes, the medial region has a tapering diameter transitioning from a diameter equal to the distal region diameter size to the proximal region diameter size, the at least one projecting member extends obliquely from the first body and defines a second lumen therethrough, and the second lumen is in fluid communication with the first lumen.
1 Assignment
0 Petitions
Accused Products
Abstract
A bifurcated stent that is positionable adjacent to a branched body vessel. The stent includes a tapered middle portion with a side branch assembly for positioning within the deviating branch of a body vessel. The portion of the stent positioned within the first body vessel and the portion positioned within the main branch vessel have largely different sized diameters. The middle region tapers steeply to bridge this diameter differential. The tapered middle region also angles the side branch assembly which can easily be extended at an angle to the main body of the stent.
-
Citations
18 Claims
-
1. A bifurcated stent having an unexpanded state and an expanded state, the stent constructed of a plurality of interconnected stent members, the stent comprising:
-
a generally tubular first body defining a first lumen, the first body having a side opening bounded by a perimeter with an area, a distal region distal to the side opening and having a diameter, a proximal region proximal to the side opening and having a diameter, and a medial region between the distal and proximal regions which defines the side opening, the area of the perimeter defines an opening plane; and a second body comprising at least one projecting member, the second body in the unexpanded state being positioned substantially within the opening plane; when in the expanded state, the distal region diameter and proximal region diameter have different sizes, the medial region has a tapering diameter transitioning from a diameter equal to the distal region diameter size to the proximal region diameter size, the at least one projecting member extends obliquely from the first body and defines a second lumen therethrough, and the second lumen is in fluid communication with the first lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A generally tubular stent extending along a longitudinal axis comprising three longitudinally successive tubular regions, the three regions being a distal region, a proximal region, and a medial region, the medial region extending between two ends, one end being adjacent to the distal region and one end being adjacent to the proximal region,
the distal region and the proximal region each having a wall defined at least partially by at least one undulating expansion column, the medial region comprising a wall and a side branch assembly, the medial region wall defined at least partially by a plurality of undulating expansion columns, the side branch assembly engaged to at least one of the plurality of undulating expansion columns of the medial region and covering an opening in the wall of the medial region with one or more petals capable of twisting away from the wall of the medial region, each of the undulating expansion columns comprising a plurality of struts, each strut being immediately circumferentially adjacent to no more than two other struts, at least some of the struts are connected at a first strut end to one immediately circumferentially adjacent strut by a first bent region which has a length and is connected at a second opposite strut end to another immediately circumferentially adjacent strut by a second bent region which also has a length, said struts and said bent regions thereby forming undulations in the undulating expansion column, each undulating expansion column being engaged to at least one immediately longitudinally adjacent expansion column by at least one connector, more than one of the plurality of undulating columns in the medial region have one attribute progressively increasing from one end to the other end, the increasing attribute being one item selected from the group of: - strut length, bent region length, number of struts per undulating expansion column, and any combination thereof.
Specification