[Assessment of musculoskeletal load in refuse collectors]. / Ocena obciazenia ukladu ruchu uladowaczy nieczystosci stalych.

BACKGROUND: The aim of this work was to assess the load on the musculoskeletal system and its effects in the collectors of solid refuse. The rationale behind this study was to formulate proposals how to reduce excessive musculoskeletal load in this group of workers. MATERIAL AND METHODS: The study group comprised 15 refuse collectors aged 25 to 50 years. Data about the workplace characteristics and subjective complaints of workers were collected by the free interview and questionnaire. During the survey the photorecording of the workpostures, the distance and velocity by GPS recorders, measurements of forces necessary to move containers, energy expenditure (lung ventilation method), workload estimation using the Firstbeat system and REBA method and stadiometry were done. RESULTS: The distance walked daily by the collectors operating in terms of 2 to 3 in urban areas was about 15 km, and in rural areas about 18 km. The most frequent musculoskeletal complaints concerned the feet (60% subjects), knees, wrists and shoulders (over 40% subjects). After work-shift all examined workers had vertebral column shorter by 10 to 14 mm (11.4 mm mean). CONCLUSIONS: The results of our study show that the refuse collectors are subjected to a very high physical load because of the work organization and the way it is performed. To avoid adverse health effects and overload it is necessary to undertake ergonomic interventions, involving training of workers to improve the way of their job performance, active and passive leisure, technical control of the equipment and refuse containers, as well as the renegotiation of contracts with clients, especially those concerning non-standard containers.

[Work performance as a risk factor for carpal tunnel syndrome]. / Sposób wykonywania pracy jako czynnik ryzyka zespolu ciesni nadgarstka.

Certification of carpal tunnel syndrome (CTS) as an occupational disease should be based on evidence that the job performance is a dominant factor responsible for its development. Features of the way the job is performed, which can increase the constriction in carpal tunnel and their quantitative analysis are presented. They include a specific position of the hand during the job performance (dorsal bending, alternate bending and extension), e.g., overcoming resistance with fingers, pincher grip, object catching and holding, exerting pressure on the hand, repeated movements or work with vibratory tools. These features characterize work of persons employed in meat processing, fitting of sub-assemblies, packing of products, or employed as supermarket cashiers. CTS occurrence in persons working with computers and thus using a keyboard or a mouse is now greatly limited owing to the improvement in ergonomic parameters of computer-equipped workposts. The paper indicates CTS risk factors (carpal tunnel size, post-traumatic lesions, rheumatoid arthritis, female gender, hormonal changes during menopause and pregnancy, and other hormonal disorders like hypothyreosis, diabetes, obesity, hypercholesterolemia, cigarette smoking, high alcohol consumption), which have been very well evidenced. In the summary, the attention was also paid to improper estimation of burden to upper limbs by listing jobs performed and stressing the need to quantitatively define hand burdening factors and estimate duration of such burdens.