Patent ID: 8333798

Claim:
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 mm 2 /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.