A catheter assembly includes a flexible tubular catheter body having a lumen open at a distal end, a negative pressure generating unit adapted to aspirate the lumen of the catheter body, and a puncture wire capable of insertion into the lumen of the catheter body. The puncture wire has at its distal...http://www.google.de/patents/US20070005019?utm_source=gb-gplus-sharePatent US20070005019 - Catheter assembly
