Hansen Medical, Inc. develops, manufactures and markets a generation of medical robotics designed for accurate positioning, manipulation and stable control of catheters and catheter-based technologies. The Company�s products include Sensei Robotic Catheter System, or Sensei system, Magellan Robotic System, Artisan Control Catheter, or Artisan catheter, Lynx Robotic Ablation Catheter, or Lynx catheter and CoHesion 3D Visualization Module, or CoHesion Module. During the year ended December 31, 2011, the Company had shipped a total of 109 Sensei systems, of which 63 were shipped in the United States and 46 were shipped to the rest of the world. During 2011, it had recognized revenue on a total of 103 of these Sensei systems. As of December 31, 2011, it had shipped one Magellan Robotic System in Europe and one vascular research system in the United States. As of December 31, 2011, 76 Sensei systems the Company had shipped were configured with the CoHesion Module.