THE PROTECTIVE EFFECT OF PROCAINE BLOCKING ON NERVE-ELECTROPHYSIOLOGICAL STUDY DURING OPERATION

Objective To clinically evaluate the protective effect of procaine blo cking on nerves. Methods Electrophysiological examination before and a fter procaine blocking was conducted on 32 nerves during operation, 18 of which were donor nerves and 14 were injured ones. Results The late ncy of somatosensory evoked potentials (SEPs) was lengthened (15.30%) and the amplitude was lowered (18.47) after procaine blocking. Compare d with the values before procaine blocking, the differences were signi ficant (P< 0.01 and P <0.05, respectively). SEP waves disappeared afte r procaine blocking in some cases (28.13%). Conclusion Latency of SEP is lengthened and amplitude is lowered after procaine blocking. In som e cases, SEPs even disappear.