Intraluminar perforated radially expandable drug delivery prosthesis and a method for the production thereof
First Claim
Patent Images
1. A radially expandable prosthesis comprising:
- a tubular wall comprising a plurality of adjacent filaments, each filament having a plurality of adjacent segments, two adjacent segments defining a segment pair, segments of segment pairs having connected ends and unconnected ends, the connected ends connected to one another via a curved section, the curved section comprising a proximal turn or a distal turn, each segment having an inflection point along its length, wherein the segments of the segment pairs are separated from one another, in a circumferential direction, by a greater distance at their connected ends than at their unconnected ends;
a plurality of axial elements joining the adjacent filaments, each axial element consisting of a single continuous curve;
a plurality of reservoirs disposed within the adjacent filaments; and
a titanium nitride coating disposed on the tubular wall, wherein the titanium nitride coating has a thickness between 1 to 10 μ
m.
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Abstract
A radially expandable prosthesis for implantation in a lumen comprises a tubular wall having an inner surface and an outer surface. The tubular wall is provided with cuts to form solid struts which have a thickness and which enables the prosthesis to expand. The solid struts have reservoirs made therethrough in the form of perforating holes for containing a therapeutic agent. The perforating holes each have an inner opening and an outer opening of substantially the same size. The prosthesis, including said perforating holes, has a smooth electrochemically polished surface.
167 Citations
17 Claims
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1. A radially expandable prosthesis comprising:
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a tubular wall comprising a plurality of adjacent filaments, each filament having a plurality of adjacent segments, two adjacent segments defining a segment pair, segments of segment pairs having connected ends and unconnected ends, the connected ends connected to one another via a curved section, the curved section comprising a proximal turn or a distal turn, each segment having an inflection point along its length, wherein the segments of the segment pairs are separated from one another, in a circumferential direction, by a greater distance at their connected ends than at their unconnected ends; a plurality of axial elements joining the adjacent filaments, each axial element consisting of a single continuous curve; a plurality of reservoirs disposed within the adjacent filaments; and a titanium nitride coating disposed on the tubular wall, wherein the titanium nitride coating has a thickness between 1 to 10 μ
m. - View Dependent Claims (2, 3, 4, 5)
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6. A radially expandable prosthesis comprising:
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a tubular wall having an outer surface, an inner surface, and a thickness therebetween, the tubular wall comprising a plurality of interconnected serpentine bands including first bands and second bands, each band comprising adjacent segments, two adjacent segments defining a segment pair, segments of segment pairs having connected ends and unconnected ends, the connected ends connected to one another via a curved section, the curved section comprising a proximal turn or a distal turn, each segment having an inflection point along its length, wherein the segments of the segment pairs are separated from one another, in a circumferential direction, by a greater distance at their connected ends than at their unconnected ends; the bands connected one to another via a plurality of connectors, each connector consisting of a single continuous curve having a first end and a second end, wherein the first end is circumferentially aligned with the second end along a common longitude; the first bands being immediately adjacent to two second bands, the second bands being immediately adjacent to two first bands, each first band being out of phase with each second band; the connectors extending between distal valleys and proximal peaks of immediately adjacent bands; every third distal valley of each of the first and second serpentine bands having one of the connectors attached thereto; the serpentine bands comprising a plurality of reservoirs; wherein the prosthesis has an electrochemically polished surface. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification