Patent ID: 6699256
Filing Date: 2004-03-02
Classification: A61B

Abstract:
Instrumentation for facilitating cutting an opening in a side wall of a body conduit comprising:a tubular structure defining a lumen and having a sharpened distal end portion configured to cut a section of the body conduit to create the opening; and a tissue holding structure axially movable within the lumen of the tubular structure, the tissue holding structure comprising a piercing portion to permit passage of the tissue holding structure through the body conduit from an entrance side adjacent the tubular structure to an exit side thereof, and a retention member to secure the section of the body conduit to the tissue holding structure during movement of the tissue holding structure to approximate the entrance side of the section of the body conduit and the sharpened distal portion of the tubular structure which cuts the section of body conduit, wherein the retention member is a barb that is resiliently biased radially outwardly in order to secure the section of body conduit, wherein the barb is deflected radially inwardly during the distal passage of the tissue holding structure through the section of the body conduit, and wherein the piercing portion comprises a needle catheter having a sharpened distal end portion to permit passage of the tissue holding structure through the section of body conduit.