Nerve Protection Evaluation: Revision Cubital Tunnel Syndrome Decompression

The objectives of this study are: 1. To evaluate the use and characterize the performance of Axoguard HA+ Nerve Protector to protect the ulnar nerve in a first revision cubital tunnel decompression by understanding post-operative outcomes (pain level, QoL, PROMs, and ulnar nerve specific functional outcomes) compared to baseline (pre-revision operative levels). 2. To summarize the safety of Axoguard HA+ Nerve Protector, an FDA-cleared device, in first revision cubital tunnel decompression procedures. 3. To characterize the feasibility of Axoguard HA+ Nerve Protector to prevent the recurrence of compressive neuropathy of the ulnar nerve at the elbow and resulting need for future revision procedures. 4. To characterize the feasibility of imaging the ulnar nerve pre- and post-operatively to assess nerve and tissue bed health. The study population includes participants 18 years of age or older presenting for evaluation of surgery for compressive ulnar nerve neuropathy at the elbow following a primary cubital tunnel syndrome decompression. Data will be collected from available medical records and patient reported outcomes questionnaires using approved data collection forms (paper or electronic). The following data will be collected at the respective study visits: demographics, primary decompression details, revision decompression details, baseline assessments, health-related QoL questionnaires, functional assessments, and recovery assessments. There will be a total of nine (9) study visits (Pre-op Screening/Baseline and Operative Day visits plus seven (7) study follow-up events).