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Assessment of the lower limb biomechanics in patients after tibiofibular syndesmosis injury treatment

Klepacki Krzysztof, Kowal Igor, Konieczny Grzegorz, Tomczyk Łukasz, Ciszewski Mariusz, Reichert Paweł, Morasiewicz Piotr

Acta of Bioengineering and Biomechanics

2021

Vol. 23, no. 4

183--190

Purpose: There is no consensus as to the number of bone cortices engaged in tibiofibular syndesmosis treatment. The purpose of our study was to assess the weight distribution on the lower limbs after tricortical or quadricortical syndesmosis fixation and different timing of screw removal. Methods: A total of 55 patients who underwent treatment for acute tibiofibular syndesmosis injury were analyzed in this study. The Zebris pedobarographic platform was used to measure the distribution of body weight on the lower limbs. The study population was stratified by the time to syndesmotic screw removal (8–15 weeks versus 16–22 weeks) and the number of bone cortices involved in fixation (three [tricortical fixation] versus four [quadricortical fixation]). Results: The weight distribution on the operated and healthy limbs in patients with tricortical syndesmosis fixation was asymmetrical, with the mean load on the operated and healthy limbs of 48.38% and 51.62%, respectively. The patients who underwent quadricortical syndesmosis fixation exhibited a symmetrical distribution of weight on the operated and healthy limb. There was a symmetrical distribution of the load of body weight on the operated and healthy limbs both in the group with different times to syndesmotic screw removal. Conclusion: Tricortical syndesmosis fixation is associated with an asymmetrical weight distribution on the operated and healthy limbs. In treating tibiofibular syndesmosis injuries, based on our pedobarographic research, quadricortical syndesmosis fixation and leaving the syndesmotic screw in place for up to 15 weeks, seems more beneficial to the patient.

Bezpieczeństwo pracy platform roboczych

Rokita T.

Bezpieczeństwo Pracy i Ochrona Środowiska w Górnictwie

2017

nr 9

27--34

Artykuł dotyczy bezpieczeństwa pracy platform roboczych. Platformy tego typu wykorzystywane są przy różnych pracach wykonywanych zarówno na wysokości, jak i w szybach górniczych i stanowią zawsze zagrożenie dla bezpieczeństwa osób na nich przebywających. Właściwe zaprojektowanie tych obiektów oraz opracowanie zasad ich poprawnej eksploatacji to kluczowe aspekty ich bezpieczeństwa [3]. Artykuł powstał na bazie ekspertyzy wykonywanej dla ustalenia przyczyn wypadku platformy roboczej, w wyniku którego śmierć poniosło czterech pracowników obsługujących platformę.

The paper deals with the safety of operation of work platforms. Platforms of this type used in various works executed both at height and in the mining shafts always constitute hazard for the safety of the persons present at these platforms. The proper designing of these structures and development of the principles for their proper operation is the key aspect of their safety. The paper was based on the expert opinion provided to determine the causes of an accident of a work platform, as a result of which four employees operating the platform were dead. The platform used to dismantle the chimney was to be pulled up to the crown of the chimney with four BYGGING hoists. In the developed technology, the methods of installation was used with the walking hoists by Bygging. Lifting up was to be executed on 4 ropes running with four lifting jacks. It can be concluded with high probability, that the direct cause of the disaster was slipping out of 2 ropes from the wedge symmetric thimble clamps. As it was proven during the test described in the paper, several simultaneous factors contributed to the wrong running of the ropes in the clamps, including the use of severely worn out clamps, the unconducting load tests for particular clamps after their installation and the lack of inspection of the clamps during a long-time operation of lifting the platform up.

Lifter, a Computerized Lifting Analysis Technique

Gilad I., Boughanim D.

International Journal of Occupational Safety and Ergonomics

2002

Vol. 8, No. 4

525--537

A computer driven technique to analyze lifting forces, in non-homogeneous load situations, is described and tested. Analysis is based on a dynamic algorithm aimed to evaluate unconstrained lifting posture and non-homogeneous content of loads. For inputs we use actual geometrical body postures in the form of 3-dimensional co-ordinates obtained from pictures taken at a work site. The outputs show a good match between the findings and pre-study assumptions for balanced and non-balanced load lifting practice. The results of the experiments show a good degree of correlation with results reported by researchers for symmetrical lifting tasks and with National Institute for Occupational Health (NIOSH) lifting guidelines. It is believed that the technique can serve as the proper choice for industrial and safety analysts of lifting activities.