Patent ID: 8518100

Claim:
A stent construction, comprising: a stent forming a bore and including a first cell pattern at one end of the stent and a second cell pattern at an opposite end of the stent, wherein each cell of the first cell pattern contains a first maximum circular area, each cell of the second cell pattern contains a second maximum circular area, and the second maximum circular area is larger than the first maximum circular area; the first cell pattern extending from the one end to about 20% to 50% of the total stent length; and a first drug carried on a first surface defined by the first cell pattern; wherein the about 20% to 50% of the total stent length carrying the first drug enables the stent to deliver an efficacious amount of the first drug to a vessel area; and wherein the remaining about 80% to 50%, respectively, of the total stent length is occupied substantially by the second cell pattern; a second drug carried on a second surface defined by the second cell pattern; wherein the first drug is not on the second surface and the second drug is not on the first surface; wherein the second cell pattern enables a dialysis needle to penetrate a graft supported by the stent and enter the stent bore by way of the second cell pattern with a substantially lower probability of damaging the stent than if the dialysis needle were to penetrate the graft and enter the stent bore by way of the first cell pattern.