A ureteral drainage stent is designed to be placed in a patient's ureter and extend into a patient's bladder. An ureteral drainage stent includes a distal region for placement in the ureter and renal cavity, and a proximal region for placement in a urinary bladder and urethra. The distal region includes...http://www.google.ca/patents/US7485150?utm_source=gb-gplus-sharePatent US7485150 - Drainage devices and methods
