Patent ID: 8142386
Filing Date: 2012-03-27
Classification: A61F,A61M

Abstract:
1. A ureteral stent comprising: an elongated member having a distal end comprising a first retention structure extending away from a longitudinal axis defined by the elongated member and a proximal end comprising a second retention structure, the elongated member having an inner surface defining a lumen between the distal end and the proximal end; and a protrusion, having a first portion and a second portion extending circumferentially from the inner surface into the lumen to partially occlude the lumen, wherein the protrusion is shaped and positioned to introduce turbulence into urine flow from the proximal end during voiding of a bladder when the distal end is disposed in a kidney and the proximal end is disposed in the bladder, the protrusion extending more than one continuous revolution around the inner surface, the first portion of the protrusion having a first height, the second portion of the protrusion having a second height different from the first height, the first height being greater than a radius of the lumen such that the first portion of the protrusion overlaps the second portion of the protrusion, the first portion of the protrusion extending from a first location of the inner surface, the second portion of the protrusion extending from a second location of the inner surface opposite the first location.