A self-expanding endovascular stent formed of stainless steel wire which is bent into an elongated zigzag pattern. The zigzag pattern has a plurality of substantially straight wire sections of various lengths separating a plurality of bends. The zigzag pattern is helically wound about a central axis...http://www.google.com.au/patents/US5507767?utm_source=gb-gplus-sharePatent US5507767 - Spiral stent
