Stent with elongating struts

摘要

A stent includes a plurality of rings which form a tubular scaffold. The rings include an elongation mechanism which allows for further expansion of the stent.

主权项

1. A stent comprising:
a plurality of rings, each ring including an alternating series of bars and hinges, each hinge configured to bend inward to allow the ring to be radially compressed from a manufactured state to a crimped state, each hinge configured to bend outward to allow the ring to radially expand from the crimped state to a deployed state; and a plurality of links connecting the rings together, wherein the rings and links form a tubular scaffold having a central axis, and wherein at least one of the bars includes an elongation mechanism having a folded configuration when the ring is in the manufactured state and the crimped state and having an unfolded configuration when the ring is in the deployed state, wherein the elongation mechanism includes a plurality of cuts, a first cut of the plurality of cuts is formed in a first side surface of a bar, a second cut of the plurality of cuts is formed in a second side surface of the bar, each of the cuts has a cut radial depth that is at least 70% of a bar radial thickness of the bar, and the cut radial depth and the bar radial thickness are in a direction perpendicular to the central axis of the tubular scaffold.