Endoluminal device exhibiting improved endothelialization and method of manufacture thereof
First Claim
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1. A method of manufacturing an implantable endoluminal device capable of radially expanding from a first diameter to a second diameter comprising the steps of:
- a. vacuum depositing a device-forming metal onto an unpatterned, exterior surface of a generally cylindrical substrate at a deposition rate that controls a formation of heterogeneities in the metal to form a generally tubular, unpatterned, substantially homogeneous metal film on the exterior surface of the substrate;
b. forming a pattern of openings through the deposited generally tubular, unpatterned, substantially homogeneous metal film to form the implantable endolumina) device, whereby the pattern of openings provide a plurality of geometric deformation regions that permit radial expansion of the implantable endoluntinal device; and
c. removing the iniplantable endoiwninal device from the substrate.
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Abstract
An implantable endoluminal device which is fabricated from materials which present a blood or body fluid and tissue contact surface which has controlled heterogeneities in material constitution. An endoluminal stent which is made of a material having controlled heterogeneities in the stent material along the blood flow surface of the stent and the method of fabricating the stent using vacuum deposition methods.
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Citations
14 Claims
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1. A method of manufacturing an implantable endoluminal device capable of radially expanding from a first diameter to a second diameter comprising the steps of:
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a. vacuum depositing a device-forming metal onto an unpatterned, exterior surface of a generally cylindrical substrate at a deposition rate that controls a formation of heterogeneities in the metal to form a generally tubular, unpatterned, substantially homogeneous metal film on the exterior surface of the substrate;
b. forming a pattern of openings through the deposited generally tubular, unpatterned, substantially homogeneous metal film to form the implantable endolumina) device, whereby the pattern of openings provide a plurality of geometric deformation regions that permit radial expansion of the implantable endoluntinal device; and
c. removing the iniplantable endoiwninal device from the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of making an implantable medical device comprising the steps of:
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a. providing a substrate having a shaped exterior surface capable of accommodating metal deposition thereupon;
b. vacuum depositing a biocompatible material onto the shaped exterior surface of the substrate at a deposition rate, with a substrate temperature, and at a deposition chamber pressure that controls a formation of heterogeneities on a surface of a biocompatible material layer; and
c. forming the implantable medical device from the, deposited biocompatible material, wherein the deposition rate is at least about 20 nm/sec. the deposition chamber pressure is less than about 2×
10−
7 torr, and the substrate temperature is between about 300 and 1100°
C.
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13. A method of making an implantable medical device comprising the stens of:
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a. providing a substrate having a shaped exterior surface capable of accommodating metal deposition thereupon;
b. vacuum depositing a a biocompatible material onto the shaped exterior surface of the substrate at a deposition rate, with a substrate temperature, and at a deposition chamber pressure that controls a formation of heterogeneities on a surface of a biocompatible material layer; and
c. forming the implantable medical device from the deposited biocompatible material, wherein the deposition rate is between about 10-100 microns/hour, the deposition chamber pressure is less than about 2×
10−
7 torr, and the substrate temperature is between about 300 and 1100°
C.- View Dependent Claims (14)
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Specification