The clinical evaluation of peripheral nerve regeneration using turns/amplitude analysis system in EMG.

Objective: The aim of this study was to explore the value of turns/amplitude analysis system in EMG in evaluating peripheral nerve regeneration. Methods: Twenty-eight patients were investigated using turns/amplitude analysis system and conventional method in EMG after nerve repair. The patients were grouped according to their muscle power and their parameters in EMG were recorded and compared among groups as well as between the two methods. Results: Statistical differences of recovery percentage were shown among the groups except turns between M3: M4 using turns/amplitude system. However, none of the differences were present among them using conventional method. Among the parameters, amplitude/s advanced the fastest although it was the lowest at early stage and it also got the highest correlation coefficient (r = 0.848). Conclusion: Turns/amplitude system was a reliable and sensitive method for evaluating nerve regeneration during nerve repair, which is more precise than the conventional method, and the amplitude was closely related to muscle function recovery.