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Experiences with preventing carpal tunnel syndrome in an automotive plant

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Žídková V., Nakládalová M., Zapletalová J., Nakládal Z., Kollárová H.

International Journal of Occupational Medicine and Environmental Health

2017

vol. 30

issue 1

45-54

Objectives Carpal tunnel syndrome (CTS) is a common occupational disease. The aim was to assess the effect of preventive measures in automotive assembly workers. Material and Methods The analysis summarizes data from annual crosssectional studies. The 7-year analysis of data was based on medical records obtained from an occupational physician and inspections carried out at the workplace where targeted preventive measures were introduced, including better ergonomic arrangement of the workplace, technical adjustments facilitating the work, preventive nerve conduction studies (NCS) testing of the median nerve once a year, switching of workers and their targeted rotation within the workplace. The NCS testing of median nerve conduction at the wrist was the basic objective method for assessment of the prevalence and severity of CTS. Over the study period, the sample comprised 1804 workers at risk for repetitive overuse of the upper extremities, of whom 281 were females with a mean age of 38.5 years and 1523 were males with a mean age of 31.4 years. Results Over the study period, a total of 13 cases of CTS were recognized as an occupational disease in the plant, 8 of which occurred within the first 2 years from the initiation of production. Introduction of preventive measures decreased the prevalence of median neuropathy from 18.3% of examined extremities in 2011 to 10.5% in 2013 (p = 0.003). In early 2014, the production pace increased and this was accompanied by a rise in abnormal NCS findings to 16.9%. Over the study period, the rate of sensorimotor neuropathy decreased in favor of merely sensory neuropathies, which have been most frequent since 2013. The percentage of employees whose contracts were terminated due to median neuropathy decreased steadily from 5.5% to 0.4%. Conclusions Targeted prevention of work-related CTS is effective as evidenced by the decrease in the prevalence of median neuropathy detected by NCS. Int J Occup Med Environ Health 2017;30(1):45–54

Factors determining the effectiveness of conservative treatment in patients with carpal tunnel syndrome

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Zwolińska J., Kwolek A.

International Journal of Occupational Medicine and Environmental Health

2019

vol. 32

issue 2

197-215

Objectives The study aims to assess selected factors contributing to the long-term effects of the conservative treatment of carpal tunnel syndrome (CTS). Material and Methods Forty-nine individuals diagnosed with CTS were enrolled in the study. The symptoms resulted from occupational hand overuse in 37 patients. The assessment involved 78 hands before the therapy (study 1) and 1 year after the end of the therapy (study 2). The clinical symptoms assessed included: pain, numbness, tingling, morning stiffness, vegetative disorders and difficulties in activities of daily living (ADL). The range of motion (ROM) in the hand joints and the pressure generated during the cylindrical grip were measured. Phalen’s tests, an electrodiagnostic test and a 2-point discrimination study were performed. Results A significant reduction of symptoms and improvement in tested parameters were found in study 2. The largest ROM in the hand, the lowest level of pain and the largest reduction in the frequency of daytime tingling were found in the oldest patients in study 2. In subjects with better initial electrodiagnostic test results, a significant reduction in daytime numbness and daytime tingling was obtained. In individuals previously subjected to conservative therapy, a significant improvement in the ROM of the hand and a better quality of sensation were noted in study 2. A higher level of pain, a lower reduction in the frequency of daytime tingling, and a smaller improvement in ADL capacity were noted in individuals who overused their hands at work after the therapy. Conclusions The effects of conservative CTS treatment after 1 year, expressed as the reduction of subjective symptoms, were independent of the patient’s age. A worse initial electrodiagnostic test result is a predictor of less favorable therapy results. Hand overuse during occupational activity may negatively affect the effects of conservative treatment in individuals with CTS. A change in the nature of occupational activity positively influenced the long-term maintenance of the effects of conservative treatment. Int J Occup Med Environ Health. 2019;32(2):197–215

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2 International Journal of Occupational Medicine and Environmental Health

1 Kollárová H.

1 Kwolek A.

1 Nakládal Z.

1 Nakládalová M.

1 Zapletalová J.

1 Zwolińska J.

1 Žídková V.

1 2019

1 2017

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Experiences with preventing carpal tunnel syndrome in an automotive plant

Factors determining the effectiveness of conservative treatment in patients with carpal tunnel syndrome