Patent ID: 7497863

Claim:
An apparatus comprising: a device for advancing a surgical instrument, the device including: a base; a first stage moveably coupled to the base; a guide tube stop coupled with the first stage, wherein the guide tube stop includes at least one guide tube lumen, an outer ring having a notch, a rocker shaped to fit within the outer ring, the rocker including a stud, a seat received between an inner surface of the ring and the rocker, the seat having legs extending through the outer ring, and a thumbscrew passing through the notch and engaging the stud, the thumbscrew operable to move the rocker; and a guide tube coupled with the guide tube stop, wherein the guide tube has an outer perimeter dimensioned and configured to snugly couple with a surface defining the guide tube lumen of the guide tube stop, and a guide tube flange adapted to engage with the guide tube stop.