Tissue accessing and anchoring device and method

A tissue accessing and anchoring device, comprising:

• a. an elongated shaft having a distal end, a proximal end and at least a distal portion having an oblong transverse cross section along the length thereof;
• b. a tissue cuffing member at or beyond the distal end of the shaft to provide access to a target site;
• c. a plurality of movable sheaths each having a distal end at or near the distal end of the shaft, a port in the distal end of the sheath and an inner bore leading to and in fluid communication with the port in the distal end;
• and
• d. a plurality of elongated anchoring elements, each of which is configured to move within the inner bore of a sheath, to extend from the port in the distal end of the movable sheath along the portion of the elongated shaft having an oblong transverse cross section, to extend beyond the distal end of the shaft and which is configured to extend into tissue at the target site to thereby anchor the device.

A node accessing and anchoring device comprising:

• an elongated shaft having a longitudinal axis, a distal end and a proximal end;
• a tissue cutting member at the distal end of the shaft;
• a movable sheath having an inner bore;
• at least one radially extending anchoring element which is configured to extend into tissue at a target site and which is disposed within said inner bore of said movable sheath at or near the distal end of the shaft, the at least one radially extending anchoring element having a retracted configuration and a deployed configuration extending from the distal end of the shaft;
• and
• a deployment actuator disposed proximal of the distal end of the elongate shaft and configured to deploy the radially extending anchoring element from a retracted configuration to an extended configuration.