Surgical access device including dual lumen cannula for anchor inflation and deflation

A surgical access device comprising:

• an elongated shaft having a first inner surface and an outer surface, the first inner surface defining an access lumen through the elongated shaft;
• grooves defined in the outer surface of the elongated shaft, each groove having:
• a first wall and a second wall, the first wall being aligned along a first axis and substantially parallel to the second wall;
• and
• a third wall interconnecting a first end of the first wall and a first end of the second wall, the third wall being aligned along a second axis and substantially orthogonal to the first wall and the second wall, wherein the second axis intersects the access lumen and the outer surface;
• an outer tube disposed over the elongated shaft, the outer tube including a second inner surface;
• and
• inflation channels defined by each groove and a respective portion of the second inner surface, each respective portion of the second inner surface interconnecting a second end of the first wall and a second end of the second wall of each groove.

A surgical access device comprising:

• a cannula including an elongated shaft having a first inner surface and an outer surface, the first inner surface defining an access lumen through the elongated shaft;
• a groove defined in the outer surface of the elongated shaft, the groove having:
• a first wall and a second wall, the first wall and the second wall being substantially planar and substantially parallel to one another, wherein the first wall and the second wall are each aligned along a respective plane that does not intersect the access lumen;
• and
• a third wall interconnecting a first end of the first wall and a first end of the second wall, the third wall being substantially orthogonal to the first wall and the second wall and aligned along a plane that intersects the access lumen and the outer surface;
• an outer tube disposed over the elongated shaft, the outer tube including a second inner surface interconnecting a second end of the first wall and a second end of the second wall;
• an inflation channel defined by the second inner surface and the groove;
• and
• an expandable anchor coupled to the elongated shaft and in fluid communication with the inflation channel.