Comparison of assessment tools to score recovery of function after repair of traumatic lesions of the median nerve

In this paper the recovery after repair of the median nerve has been used to compare different assessment tools for evaluation of peripheral nerve function: touch ( moving 2-point discrimination (2PD); Semmes-Weinstein ( SW) monofilament, motor ( Medical Research Council (MRC) scale), combined motor and sensory (Dellon modification of the Moberg pick up test; Moberg Recognition test), and pain ( visual analogue scale; pinprick-test). The mean (SD) age of our 28 patients was 28 ( 12) years. The mean ( SD) follow-up period was 5 years, 2 months ( 2 years, 8 months). On the operated side three patients (11%) had a moving 2PD of less than 4 mm. The results of the moving 2PD were compared with those of the SW monofilaments, but with a poor correlation. The MRC score correlated well with opposition movement of the thumb and muscle wasting (p <0.01). We recommend a number of tests to evaluate ( the chronological return of) peripheral nerve function.