Cent Eur J Public Health 2016, 24(1):58-67

Evaluation of Lumbar Spine Load by Computational Method in Order to Acknowledge Low-back Disorders as Occupational Diseases

Jana Hlávková1, Tomáš Lebeda1, Tomáš Tichý1, Petr Gaďourek4, Pavel Urban1,3, Marie Nakládalová2, Andrea Laštovková3, Zdenka Fenclová3, Petr Ridzoň3,7, Edvard Ehler5, Milan Richter6, Lenka Pešáková8, Daniela Pelclová3
1 National Institute of Public Health, Prague, Czech Republic
2 Department of Occupational Medicine, Medical Faculty, University of Palacký in Olomouc and General University Hospital in Olomouc, Olomouc, Czech Republic
3 Department of Occupational Medicine, First Medical Faculty, Charles University and General University Hospital, Prague, Czech Republic
4 GETA Centrum, Prague, Czech Republic
5 Department of Neurology, Regional Hospital, Pardubice, Czech Republic
6 1st Department of Orthopaedics, First Medical Faculty, Charles University and Motol University Hospital, Prague, Czech Republic
7 Thomayer's Hospital, Prague, Czech Republic
8 Regional Public Health Institute, Olomouc, Czech Republic

Aim: The aim of the study was to develop a computational module for the prediction of compressive force on the L4/L5 disc suitable for use in field settings.

Method: The value of compressive force is intended to be used as a proxy measure of the mechanical burden of low-back when performing work activities. The compressive force predicted by the module in a particular worker should be compared with the NIOSH limit value of 3,400 N for the assessment of lumbar spine load during manual lifting tasks. Exceeding the limit will be considered as the fulfilment of "hygienic criterion" that should be met to acknowledge low-back disorder as an occupational disease. To develop the computational module we used the ergonomic software TECNOMATIX Classic Jack taking into account the anthropometric parameters of a worker and ergonomic parameters of his/her work activity.

Results: We calculated compressive forces on the L4/L5 disc in about 1,300 simulated combinations of various factors influencing compressive force. Parameters which turned out to be crucial for the compression of L4/L5 disc were included in the computational algorithm.

Conclusion: Our study was primarily aimed at the assessment of lumbar disorders as occupational diseases. Moreover, the study can contribute to the recommendation of preventive measures to decrease health risks in occupations associated with the overload of low-back region. The graphic maps generated by the computational module enable a fast and exact analysis of particular job.

Keywords: low-back disorders, low-back pain, compressive force, manual lifting, lumbar spine load assessment, biomechanical analysis, ergonomic software, trunk posture, evaluation, prediction, time, frequency, criteria, prevention

Received: March 5, 2015; Revised: August 6, 2015; Accepted: August 6, 2015; Published: March 1, 2016  Show citation

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Hlávková J, Lebeda T, Tichý T, Gaďourek P, Urban P, Nakládalová M, et al.. Evaluation of Lumbar Spine Load by Computational Method in Order to Acknowledge Low-back Disorders as Occupational Diseases. Cent Eur J Public Health. 2016;24(1):58-67. PubMed PMID: 27070971.
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