Abstract: An implant prosthesis for surgically by-passing the distal portion of the natural urethral tract for the removal of biological liquids, especially urine, consists of one or more artificial ureters disposed in a conical sheath connected with flexible tubing joining a tank forming a bladder replacement which in turn is connected by flexible tubing to the urethra when retained or extends to provide a controlled valved vent at the surface of a patient's body in which the prosthesis is surgically implanted, as for example following the removal of bladder cancer and its associated damaged distal urinary system.