An anatomic space of the body, particularly the pericardial space, is accessed in a minimally invasive manner from a skin incision by an access instrument to facilitate visualization and introduction of devices or drugs or other materials, performance of medical and surgical procedures, and introducing...http://www.google.com/patents/US20050182465?utm_source=gb-gplus-sharePatent US20050182465 - Instruments and methods for accessing an anatomic space
