Hollow tubular drug eluting medical devices
First Claim
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1. A method of forming a medical device comprising the steps of:
- forming an outer member over a core member, wherein the outer member has an outer surface and an inner surface, the inner surface defining an outer member lumen such that the core member is disposed within the outer member lumen, the outer and core members forming an elongate composite wire;
shaping the composite wire into a pattern by bending the composite wire into a waveform, wherein the pattern defines a stent lumen;
forming openings through the outer member; and
after the step of shaping the composite wire into the pattern, exposing the composite wire to an etchant that reacts with the core member to remove the core member from the outer member without adversely affecting the outer member.
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Abstract
A method of a forming a hollow, drug-eluting medical device includes providing composite member having an outer member and a core member disposed within a lumen of the outer member. The composite member is shaped into a pattern. Openings are formed through the outer member of the composite member. The composite member is processed to remove the core member from the lumen of the outer member without harming the outer member, leaving a hollow tubular member already formed into the desired pattern. The lumen of the outer member is filled with a therapeutic substance.
143 Citations
20 Claims
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1. A method of forming a medical device comprising the steps of:
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forming an outer member over a core member, wherein the outer member has an outer surface and an inner surface, the inner surface defining an outer member lumen such that the core member is disposed within the outer member lumen, the outer and core members forming an elongate composite wire; shaping the composite wire into a pattern by bending the composite wire into a waveform, wherein the pattern defines a stent lumen; forming openings through the outer member; and after the step of shaping the composite wire into the pattern, exposing the composite wire to an etchant that reacts with the core member to remove the core member from the outer member without adversely affecting the outer member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of forming a medical device comprising the steps of:
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shaping a composite member into a pattern, the composite member including an outer member formed from MP35N and a core member disposed within a lumen of the outer member, wherein the core member is formed from one of tantalum, tungsten, molybdenum, niobium, rhenium, carbon, germanium, and silicon;
forming openings through the outer member; and
after the step of shaping the composite member into the pattern, processing the composite member such that the core member is removed from the outer member without adversely affecting the outer member, wherein the step of processing the composite member comprises exposing the composite member to a xenon difluoride gas that reacts with the core member to remove the core member, wherein the xenon difluoride gas does not react with the outer member. - View Dependent Claims (18, 19, 20)
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Specification
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Current AssigneeMedtronic Vascular, Inc. (Medtronic Plc)
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Original AssigneeMedtronic Vascular, Inc. (Medtronic Plc)
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InventorsBirdsall, Matthew J., Storment, Christopher, Perkins, D. H., Thompson, Dustin
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Primary Examiner(s)Kassa, Tigabu
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Application NumberUS12/500,359Publication NumberTime in Patent Office2,441 DaysField of SearchNoneUS Class Current1/1CPC Class CodesA61B 2017/00526 Methods of manufacturingA61L 31/022 Metals or alloysA61L 31/16 Biologically active materia...A61M 25/0012 with embedded structures, e...A61M 25/0015 Making lateral openings in ...A61N 1/0587 Epicardial electrode system...
