Spiral implant for organ pathways, in particular for blood vessels, which is formed from a primary spiral made of metal or a primary tube made of an elastic synthetic material whose anterior end is closed and whose cross-section at a distance of 0.5 to 2 mm from the other end of the primary spiral or...http://www.google.es/patents/US5536274?utm_source=gb-gplus-sharePatente US5536274 - Spiral implant for organ pathways
