Patent ID: 8021434

Claim:
A ureteral stent, comprising: (a) an elongated portion defining a lumen extending therethrough and including a length sufficient to extend substantially within the ureter from the kidney to the bladder; (b) a first end portion extending from one end of the elongated portion, defining an interior space in communication with the lumen, and defining at least one opening in communication with the interior space, the first end portion for placement substantially within the kidney and adapted to assume a retaining configuration when placed substantially within the kidney; and (c) a second end portion extending from another end of the elongated portion and flaring outward when placed substantially within the bladder to maintain position substantially within the bladder, the second end portion including a single continuous sheet forming a conical wrapping, the conical wrapping being self-collapsible after implantation to at least partially prevent fluid from passing into the lumen from the bladder, the second end portion remaining proximal of the elongated portion when disposed within the bladder.