An apparatus for passing a guidewire through a subcutaneous tissue tunnel to enable over-the wire insertion of a catheter through the tissue tunnel. The apparatus comprises an elongated member having a distal end portion having a tip configured to advance through the tissue tunnel and an opening extending...http://www.google.com/patents/US7097635?utm_source=gb-gplus-sharePatent US7097635 - Guidewire retrieval member for catheter insertion
