Outcomes for inclusion in the summary of findings table	Score
Muscle strength, measured by BMRC grading in selected muscles (abductor digiti minimi for ulnar nerve, palmar abduction for median nerve)	Score 0–5 (0 = no movement, 5 = normal)
Sensory recovery, measured by BMRC grading	Score S0–S4 (S0 = no sensation, S4 = normal)
Integrated functional outcome, measured by Rosén Model Instrument	Score 0 to 3 (0 = no demonstrable function, 3 = normal)
Touch threshold, measured by Semmes‐Weinstein monofilament	Score 0–15 (0 = no sensory function, 5 = normal)
Impact on daily living, measured by DASH PROM	Score 0–100 (0 = no disability, 100 = most severe disability)
Adverse events	Proportion of participants experiencing an adverse event per group
Serious adverse events: further surgery (device removal or revision)	Proportion of participants requiring further surgery (device removal or revision)