A transvesicular drainage device, designed to drain excess fluid from a variety of locations in the human body into the bladder. The device may be used to treat ascites or any fluid collection within the body of a human, or a non human mammal....http://www.google.es/patents/US7335179?utm_source=gb-gplus-sharePatente US7335179 - Vesicular shunt for the drainage of excess fluid
