Access trocar and related method thereof

摘要

System and method that is directed to medical treatments of organs having anatomical spaces, such as (but not limited to) the heart and the pericardial space. Specifically, an apparatus and method is provided for safely accessing anatomical spaces with surfaces to deliver medical devices or media into such spaces, or to remove fluids from such spaces. The methods and apparatus may include a first elongated member with a sharp tip used to penetrate the surface surrounding the anatomical space with a second elongated member with a helical tine used to engage the surface and lift the surface away from the underlying anatomical space. Once the first elongated member has incised the surface, it is removed, and the incision may be used as a point of entry for delivering media or medical devices into the anatomical space, or for carrying out further medical procedures.

主权项

1. A method for accessing a subject's anatomical space having a surface, the method comprising:
providing a first elongated member comprising a proximal end and a distal end, said distal end comprising a sharp end; providing a second elongated member comprising a proximal end, a distal end, a first middle portion adjacent to said distal end, and a second middle portion adjacent to said proximal end, said second middle portion of said second elongated member including a helical groove, and said distal end comprising a helical tine engaging said surface with said helical tine; providing a third elongated member comprising a longitudinal aperture, a distal end, a middle portion, and a proximal end, wherein said third elongated member at least substantially encloses said first elongated member and said second elongated member; providing a driving mechanism including a driver tab, said driver tab adapted to pass through said longitudinal aperture of said third elongated member and engage said helical groove of said second elongated member; driving the second elongated member in a distal direction by moving the driver tab distally; driving the second elongated member in a proximal direction by moving the driver tab proximally; and turning said helical tine to cause lifting of said surface in a proximal direction, whereby the lifting assists in advancing said surface in contact with said sharp end to cause an incision of the surface by said sharp end.