Analysis of effects on conduction velocity of the peripheral nerve and biological indexes in workers exposed to lead

Objective The aim is to study the effect on the conduction velocity of the peripheral nerve and biological indexes in workers exposed to lead. Methods In 66 observed subjects and 40 persons as the control group, the conduction velocity of peripheral nerve was examined by electromyography and several biological indexes were tested. Results The sense conduction velocity (MCV,SCV) of the median nerve and ulnar nerve was much slower and the distal sense latency( SL) of sural nerve was longer in 10 years workers than in 10 years controls (P 0. 05). Biological indexes PbB ,ZPP,EFP, Hb and PbU were different between 10 years and 0 years groups. The abnormal rate of the conduction velocity of the peripheral nerves and biological indexes in 10 years group has no more significant difference than in 10 years group, but the relative risk is 4. 1 and 5.3 times higher, respectively. Conclusion Lead is harmful to the peripheral nerve system in workers exposed for a long term.