The protective effect of procaine blocking on nerve-electrophysiological study during operation.

OBJECTIVE

To clinically evaluate the protective effect of procaine blocking on nerves.

METHODS

Electrophysiological examination before and after procaine blocking was conducted on 32 nerves during operation, 18 of which were donor nerves and 14 were injured ones.

RESULTS

The latency of somatosensory evoked potentials (SEPs) was lengthened (15.30%) and the amplitude was lowered (18.47) after procaine blocking. Compared with the values before procaine blocking, the differences were significant (P < 0.01 and P < 0.05, respectively). SEP waves disappeared after procaine blocking in some cases (28.13%).

CONCLUSION

Latency of SEP is lengthened and amplitude is lowered after procaine blocking. In some cases, SEPs even disappear.