and introduction of devices or drugs or other materials, performance of medical and surgical procedures, and introducing...http://www.google.es/patents/US7186214?utm_source=gb-gplus-sharePatente US7186214 - Instruments and methods for accessing an anatomic space B???squeda avanzada de patentes N???mero de publicaci???nUS7186214 B2Tipo de publicaci???nConcesi???n N???mero de solicitudUS 10/777,249