Patent ID: 8636791

Claim:
A stent system comprising a plurality of expandable stents, each of said stents having a wall surface forming an interior and an exterior, each of said stents having a first terminal end and a second terminal end and a length defined by the distance between said first and second terminal ends, each of said plurality of stents, along the length of each of said plurality of stents, when expanded, sized to be greater in diameter than the tubular lumen into which each of said plurality of stents is intended to be deployed, at least one of said plurality of stents (the “interior stent”) terminal ends configured to be placed interior the second terminal end of another of said plurality of stents (the “exterior stent”), where said configuration comprises a reinforced first terminal end on said interior stent, where said reinforcement comprises an expandable helical ring not constrained by a liner, said helical ring being of a length of less than or equal to one-fifth of the length of said interior stent, said reinforced first terminal end providing more expansive spring force than the second terminal end of said exterior stent to prevent the interior stent from sliding with respect to said exterior stent when deployed in said interior stent.