SPY Angiography To Assist With Ulnar Nerve Transposition at the Elbow

The purpose of this study is to use laser imaging to determine the extent of nerve decompression (release) while patients are still in surgery. Commonly, this is determined by electrodiagnostic tests or physical examination. The researchers will use the SPY elite device along with an injection of a drug called SPY Agent green (indocyanine green) in an imaging procedure called fluorescence angiography to visualize the change in blood supply to the nerve, following the nerve decompression surgery and assess if SPY is a useful tool for evaluating the success of nerve decompression surgery. The use of fluorescence angiography with the SPY elite device and SPY agent green is Food and Drug Administration (FDA) approved.