A ureteral stent is designed to be placed within a patient's ureter to facilitate drainage from the patient's kidneys to the bladder. An elongated portion of the stent includes a length sufficient to extend substantially within the ureter from the kidney to the bladder, and the elongated portion defines...http://www.google.es/patents/US8088170?utm_source=gb-gplus-sharePatente US8088170 - Ureteral stent