Arthroscopic-assisted exploration of the axillary nerve through a posterior open approach: A novel technique

Introduction Previous studies have described a segment of the axillary nerve (AN) that cannot be surgically explored through standard open surgical approaches (blind zone). This study aimed to evaluate the feasibility of combining the standard posterior approach to the AN by using an arthroscope to visualize all segments of the AN. Material and methods Four fresh-frozen shoulders in two adult human torsos were included in the study. A standard posterior approach was performed on each shoulder, and a dry arthroscopy was performed through the surgical opening in an attempt to visualize all the segments of the AN. A surgical clip was placed at the most proximal and anterior segment of the AN that could be visualized with the arthroscope. A standard open deltopectoral approach was then performed to determine the exact location of the surgical clip and its relation to the origin of the AN. Results All segments of the AN (including the blind zone) were visualized from the quadrilateral space to their origin from the posterior cord in all four specimens. The surgical clip was found at an average of 1 cm (range from 0.5 to 1.5 cm) from the origin of the AN from the posterior cord. Conclusions This cadaveric study shows that it is feasible to visualize all segments of the AN (including the blind zone) using this novel approach that combines the use of the standard posterior approach to the AN with dry arthroscopic exploration. Clinical studies are necessary to evaluate the utility of this novel approach.