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Biomedical subjects

H Dupuis

Publications and source records attributed to H Dupuis.

34 records · Page 2Linked to original sources
PubMed1980

[Orthostatis stress from standing at work].

The evaluation of different body postures during work needs considering the interactions of anthropometric, physiological, orthopaedic, angiologic and biomechanical criteria on one side and of working conditons on the other. Many professions in industry as well as many tasks of the housewife still have to be done in standing position. But standing for long periods leads to increased strain of the bone and muscle system and to increased complaints and illness of the feet and legs. A comprehending catalogue of the effects of dominating standing posture and a catalogue of preventive measures are presented.

Biomechanical Phenomena↗
PubMed1979

[Animal experiments on the biomechanical vibration behaviour of the bulbus (author's transl)].

Mechanical vibration may have a detrimental effect on visual performance. This particularly seems to be the case if the natural frequency of the bulbus is excited. Experiments with animals were made with the aim of calculating the biomechanic transmission of vibration between the cranium and bulbus. Postmortem experiments using pig crania have shown that in vivo application of the method of sewing miniature accelerometers onto the cornea may be possible. Our experiments with monkeys gave typical resonance curves for the transmission of vibration of the bulbi with maxima between 25 and 31.5 Hz. Transferability of the results to the human eye is discussed.

Animals↗
PubMed1975

[Mechanical factors contributing to the cause of retinal detachment (author's transl)].

There is no doubt that besides the anatomical changes in vitreous and retinal structures mechanical factors are involved in producing retinal detachment. Especially vertical accelerations can produce fast movements of the vitreous, which also can induce the retina. To investigate the effect of various external movements upon the eye a number of experiments were made: 31 variations of movements with and without different vehicles at different speeds have been investigated. As direct measurements of acceleration of the eye are not possible at present, the upper verges of the orbitae were chosen as measuring point. Additionally accelerations were measured nearest to the place of the entrance of vibration to the body in order to examine the transmissibility of vibration to the orbita. The transduced signal of the accelerometer was recorded on a tape. When measuring in vehicles or riding, radiotelemetry of the signal was used. The statistical analysis of the results was performed. Typical frequencies were found in which the amplitude of the induced acceleration even is enlargen on its way through the body to the orbita. The significance of the different results for producing dangerous mechanical stress to the eye is discussed.

Acceleration↗