title: Vibration upshot of operating mechanical sewing machine: an insight into common peroneal nerve conduction study.
abstract: BACKGROUND
  Most of the people associated with tailoring occupation in Nepal are still using mechanical sewing machine as an alternative of new technology for tailoring. Common peroneal nerves of both right and left legs are exposed to strenuous and chronic stress exerted by vibration and paddling of mechanical sewing machine.
  
  
  METHODS
  The study included 30 healthy male tailors and 30 healthy male individuals. Anthropometric variables as well as cardio respiratory variables were determined for each subject. Standard Nerve Conduction Techniques using constant measured distances were applied to evaluate common peroneal nerve (motor) in both legs of each individual. Data were analyzed and compared between study and control groups using Man WhitneyUtest setting the significance levelp≤ 0.05.
  
  
  RESULTS
  Anthropometric and cardio respiratory variables were not significantly altered between the study and control groups. The Compound muscle action potential (CMAP) latency of common peroneal nerves of both right [(11.29 ± 1.25 vs. 10.03 ± 1.37),P< 0.001] and left [(11.28 ± 1.38 vs. 10.05 ± 1.37),P< 0.01] legs was found to be significantly prolonged in study group as compared to control group. The Amp-CMAP of common peroneal nerves of both right [(4.57 ± 1.21 vs. 6.22 ± 1.72),P< 0.001] and left [(4.31 ± 1.55 vs. 6.25 ± 1.70),P< 0.001] legs was found significantly reduced in study group as compared to control group. Similarly, the motor nerve conduction velocity (MNCV) of common peroneal nerves of both right [(43.72 ± 3.25 vs. 47.49 ± 4.17),P< 0.001] and left [(42.51 ± 3.82 vs. 46.76 ± 4.51),P< 0.001] legs was also found to be significantly reduced in study group in comparison to control group.
  
  
  CONCLUSIONS
  Operating mechanical sewing machine by paddling chronically and arduously could have attributed to abnormal nerve conduction study parameters due to vibration effect of the machine on right and left common peroneal nerves. The results of present study follow the trend towards presymptomatic or asymptomatic neuropathy similar to subclinical neuropathy.
authors.affiliation: Department of Physiology, Chitwan Medical College, Bharatpur, Nepal.
authors.forename: Prakash Kumar
authors.initials: PK
authors.lastname: Yadav
authors.affiliation: Department of Physiology, Chitwan Medical College, Bharatpur, Nepal.
authors.forename: Ram Lochan
authors.initials: RL
authors.lastname: Yadav
authors.affiliation: Department of Physiology, Chitwan Medical College, Bharatpur, Nepal.
authors.forename: Deepak
authors.initials: D
authors.lastname: Sharma
authors.affiliation: Department of Physiology, Chitwan Medical College, Bharatpur, Nepal.
authors.forename: Dev Kumar
authors.initials: DK
authors.lastname: Shah
authors.affiliation: Department of Physiology, Chitwan Medical College, Bharatpur, Nepal.
authors.forename: Niraj Khatri
authors.initials: NK
authors.lastname: Sapkota
authors.affiliation: Department of Physiology, BP Koirala Institute of Health Sciences, Dharan, Nepal.
authors.forename: Dilip
authors.initials: D
authors.lastname: Thakur
authors.affiliation: Department of Physiology, BP Koirala Institute of Health Sciences, Dharan, Nepal.
authors.forename: Nirmala
authors.initials: N
authors.lastname: Limbu
authors.affiliation: Department of Physiology, Chitwan Medical College, Bharatpur, Nepal.
authors.forename: Md Nazrul
authors.initials: MN
authors.lastname: Islam
keywords: Amplitude; Latency; Mechanical sewing machine; Neuropathy; Peroneal nerve; Vibration