A surgical cannula system. The surgical cannula system includes a cannula (60) having a proximal end a distal end and a lumen (82) extending therebetween. A tissue attachment ring (110) being configured to be coupled to a biological tissue (74) includes a lumen (117) extending therethrough. A locking mechanism (119) has a first locking state in which the cannula (60) is configured to move with respect to the tissue attachment ring (110) and a second locking state in which movement of the cannula (60) with respect to the tissue attachment ring (110) is resisted.
