A catheter assembly is provided with a flexible tubular body having two lumens. A solid slidable member with a sharp distal end is disposed within one of the lumens. The slidable member is capable of sliding within the lumen of the tubular body between an exposed position in which the sharp distal end...http://www.google.com.au/patents/US7959595?utm_source=gb-gplus-sharePatent US7959595 - Catheter assembly
