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Medial plantar nerve conduction velocities among patients with vibration syndrome due to chain-saw work
M Hirata1, H Sakakibara, S Yamada
1Department of Occupational Health, Osaka Prefectural Institute of Public Health, Nakamichi 1-3-69, Higashinari-ku, 537-0025, Osaka, Japan. hirata@iph.pref.osaka.jp
Objective:
The present study examined the effect of the vibration syndrome (VS) on the peripheral nervous system in the lower extremities.
Methods:
Thirty-eight patients with VS due to previous exposure to vibration from chain-saw work and 55 age-matched controls were examined for sensory nerve conduction velocities in the medial plantar nerve (SCV-P). The patient group was divided into two subgroups, one with (n=19) and the other without vibration-induced white finger (VWF; n=19).
Results:
Analysis of variance of SCV-P for the three groups showed significant difference (F(2,89)=10.65, P < 0.0001). A significant difference was found between the controls and the VWF(+) group (P < 0.0001) but not between the controls and the VWF(-) group (P=0.0508) by multiple comparison using Scheffe's method.
Conclusion:
These findings suggest that VS affects the peripheral nervous system function in the lower extremities via mediation of circulatory disturbance manifested as VWF.