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Biomedical subjects

R Gentaz

Publications and source records attributed to R Gentaz.

22 records · Page 2Linked to original sources
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[Posturographic study of total prostheses in the leg. Apropos of 88 patients examined].

By suppressing certain articular sensory receptors, the reconstructive surgery of joints using total prostheses modifies tonic postural activity and, by this means, alters the regulation of balance in the subjects of operation. This doubtless explains certain discrepancies between the apparently excellent results in respect of joint movement and muscle strength and poor utilisation of the joint in every day life (instability, use of sticks or failure to use the joint in walking). Drawing on the experience and basic work of specialists in posture, the authors have undertaken a study of tonic postural activity in patients who had received a total prosthesis in the lower limb, both from the clinical aspect and by graphic measurement using an electronic apparatus, the statokinesiometer. Fourteen normal subjects were tested to calibrate the apparatus and 8 patients suffering from established osteoarthritis of the hip were studied as controls. Analysis of tonic postural activity was made in 66 patients who had received total prostheses in the lower limb. The results showed significant disturbance in balance in ankle prostheses, minimal disturbance in knee prostheses and not significant disturbance in hip prostheses. Certain therapeutic implications are derived from this study.

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[Normal gait and its changes after total arthroplasty of the lower extremity. Study on 200 subjects of the support phase of the step and its impulse].

The authors have studied the normal gait of 50 individuals using a dynamometric platform. Measurements have been made of the impulse at each step, the weight bearing phase and the forces transmitted by the foot to the floor. The results have been compared with those obtained from a study of the gait of 150 patients treated by total prostheses (133 hips, 10 knees, 7 ankles). This type of study leads to a better appreciation of operative results.

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