A device for capturing an embolus within a vessel of a patient's body has at least one helix made of a mesh material. The at least one helix has a plurality of turns helically arranged around a longitudinal axis. The mesh material has a plurality of pores therein and the pores have a size ≧120 μm....http://www.google.com.au/patents/US20060020286?utm_source=gb-gplus-sharePatent US20060020286 - Device for filtering blood in a vessel with helical elements
