Guidance system mounts for surgical introducers

A delicate tissue retraction system for use with a navigation probe having a probe shaft and a probe tip at a distal end of the probe shaft, the delicate tissue retraction system comprising:

• a retractor comprising a hollow tubular retractor passage extending along a longitudinal axis from a proximal retractor end to a distal retractor end;
• an introducer comprising an introducer wall forming a hollow introducer channel extending from a proximal introducer end to a distal introducer end, the introducer being configured to be removably installed within the retractor such that the proximal introducer end and distal introducer end are located along the longitudinal axis and the distal introducer end extends beyond the distal retractor end;
• a probe shaft receptacle suspended from the introducer wall at a location within and spaced from the introducer wall, the probe shaft receptacle having a probe passage formed by an interior wall of the probe shaft receptacle, the probe passage being axially aligned with the introducer channel and dimensioned to receive the probe shaft therethrough;
• the interior wall of the probe shaft receptacle comprising a slot extending along the longitudinal axis and intersecting the probe passage at a first portion of the probe passage;
• and
• a clamp configured to selectively reduce a size of the slot to compress the probe shaft receptacle at the slot and hold the probe shaft at a fixed location with respect to the probe shaft receptacle.