Implantable medical devices with enhanced visibility, mechanical properties and biocompatability
First Claim
Patent Images
1. A stent for insertion into a bodily vessel for treatment of an aneurysm or ischemic diseases,wherein the stent is made from a platinum:
- rhodium;
ruthenium alloy comprising a composition of about 75-80% of platinum, 12-18% of rhodium and 5-10% of ruthenium;
wherein the stent comprises a generally tubular structure having an exterior surface defined by a plurality of interconnected struts having a plurality of interstitial spaces therebetween, the stent having a sidewall thickness between about 0.0012 inches and 0.0028 inches;
wherein the plurality of interstitial spaces have been cut from a sheet of metal forming the stent;
wherein the stent is sized to be positioned entirely within an intracranial vessel; and
wherein the stent comprises a self-expandable latticework of struts, the struts being interconnected to form a plurality of rings, the stent further comprising first ring connectors and second ring connectors, the first ring connectors connecting only two adjacent rings, the two adjacent rings being axially spaced relative to each other, the second ring connectors connecting only three adjacent rings, the three adjacent rings being axially spaced relative to each other, wherein at a given circumferential position of the stent, all of the first and second ring connectors are axially spaced from each other, the struts (i) each having a thickness and width of less than 0.0028 inches, (ii) providing even wall coverage along the length of the stent, and (iii) providing a stent surface to length ratio from 1.1-1.3 mm2/mm, such that the stent expands with a force equal to or less than 4 atm and has a flexibility such that deflection of 1 mm from a neutral line occurs with less than 8 grams of force.
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Accused Products
Abstract
An implantable mechanical device for insertion into a passage, where the device is made from a platinum alloy selected from the group consisting of platinum:iridium alloy, platinum:tungsten alloy, platinum:rhodium:ruthenium alloy, platinum:rhodium alloy and platinum:nickel alloy.
178 Citations
20 Claims
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1. A stent for insertion into a bodily vessel for treatment of an aneurysm or ischemic diseases,
wherein the stent is made from a platinum: - rhodium;
ruthenium alloy comprising a composition of about 75-80% of platinum, 12-18% of rhodium and 5-10% of ruthenium;wherein the stent comprises a generally tubular structure having an exterior surface defined by a plurality of interconnected struts having a plurality of interstitial spaces therebetween, the stent having a sidewall thickness between about 0.0012 inches and 0.0028 inches; wherein the plurality of interstitial spaces have been cut from a sheet of metal forming the stent; wherein the stent is sized to be positioned entirely within an intracranial vessel; and wherein the stent comprises a self-expandable latticework of struts, the struts being interconnected to form a plurality of rings, the stent further comprising first ring connectors and second ring connectors, the first ring connectors connecting only two adjacent rings, the two adjacent rings being axially spaced relative to each other, the second ring connectors connecting only three adjacent rings, the three adjacent rings being axially spaced relative to each other, wherein at a given circumferential position of the stent, all of the first and second ring connectors are axially spaced from each other, the struts (i) each having a thickness and width of less than 0.0028 inches, (ii) providing even wall coverage along the length of the stent, and (iii) providing a stent surface to length ratio from 1.1-1.3 mm2/mm, such that the stent expands with a force equal to or less than 4 atm and has a flexibility such that deflection of 1 mm from a neutral line occurs with less than 8 grams of force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- rhodium;
-
11. A stent for insertion into a bodily vessel for treatment of an aneurysm or ischemic diseases,
wherein the stent is made from a platinum: - rhodium alloy comprising a composition of about 65-75% of platinum and 25-35% of rhodium;
wherein the stent comprises a generally tubular structure having an exterior surface defined by a plurality of interconnected struts having a plurality of interstitial spaces therebetween, the stent having a sidewall thickness between about 0.0012 inches and 0.0028 inches; wherein the plurality of interstitial spaces have been cut from a sheet of metal forming the stent; wherein the stent is sized to be positioned entirely within an intracranial vessel; and wherein the stent comprises a self-expandable latticework of struts, the struts being interconnected to form a plurality of rings, the stent further comprising first ring connectors and second ring connectors, the first ring connectors connecting only two adjacent rings, the two adjacent rings being axially spaced relative to each other, the second ring connectors connecting only three adjacent rings, the three adjacent rings being axially spaced relative to each other, wherein at a given circumferential position of the stent, all of the first and second ring connectors are axially spaced from each other, the struts (i) each having a thickness and width of less than 0.0028 inches, (ii) providing even wall coverage along the stent, and (iii) providing a stent surface to length ratio from 1.1-1.3 mm2/mm, such that the stent expands with a force equal to or less than 4 atm and has a flexibility such that deflection of 1 mm from a neutral line occurs with less than 8 grams of force. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
- rhodium alloy comprising a composition of about 65-75% of platinum and 25-35% of rhodium;
Specification