There is provided a computer-executed method of freeing memory. Images and sensed data are obtained regarding an upper airway of a patient. The aperture 15 is positioned in axial alignment with the outer cylindrical wall 18 of the mid-portion 14. A plurality of fastening members is attached to the upper surface of the canopy for selectively fastening objects to the canopy. The termination fixture provides an interface that exposes portions of the drive member to direct movement by an external system that may include a manipulator and a sterile barrier.