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A Thevenon

Publications and source records attributed to A Thevenon.

At least 37 records · Page 2Linked to original sources
PubMed2000

Gait pattern classification of healthy elderly men based on biomechanical data.

OBJECTIVES: To distinguish the gait patterns of young subjects from those of elderly men using three-dimensional (3D) gait data, to determine if elderly subjects displayed other than a typical gait pattern, and to identify which parameters best describe them. DESIGN: Nonrandomized study in which video and force plate data were collected at the subject's own free walking speed and used in a 3D inverse dynamic model. Cluster analysis was chosen to identify the gait families, and analyses of variance were performed to determine which parameters were different. SETTING: A gait laboratory. PARTICIPANTS: The sample of convenience involved a single but mixed group consisting of 16 able-bodied elderly subjects (mean age, 62yrs) and 16 able-bodied young subjects aged between 20 and 35 years. MAIN OUTCOME MEASURES: Phasic and temporal gait parameters, as well as the 3D muscle powers developed in the joints of the right lower limb during the gait cycle. RESULTS: The walking patterns in elderly subjects were found to be different from those of the young adults. Three elderly gait families or groups forming a specific gait pattern were identified, and differences were found in the phasic and temporal parameters as well as in 6 peak muscle powers. Four of the peak powers occurred in the sagittal plane, and half of them were related to the hip. CONCLUSIONS: Biomechanical parameters can be used to classify the gait patterns of young and elderly men using cluster analysis rather than age alone. The muscle powers in elderly subjects are perturbed throughout the gait cycle and not only at push-off. It appears that the plane in which the peak powers occurred was related to their occurrence in the gait cycle. Variability in the gait patterns of elderly subjects could reflect natural adaptations or compensations. These should not be indicative of a deficient gait or be misconstrued as some age-related pathology.

Adult↗
PubMed2000

Heart rate response to two lifting techniques.

OBJECTIVE: To determine the heart rate response to repetitive lifting of light weights employing two techniques, stoop and squat. DESIGN: Randomized cross-over trial. PARTICIPANTS: Twenty healthy volunteers (11 women, 9 men), mean age of 25 years, recruited from the staff of a physical medicine and rehabilitation department. METHODS: Subjects lifted and lowered a box weighing 0, 1, or 3 kg, using the stoop (bent at waist with knees straight) and squat (knees bent) techniques, 20 times in 1 minute. MAIN OUTCOME MEASURES: The heart rate was recorded every 5 seconds during the effort aid 30 seconds and 1 minute after the test. RESULTS: Significantly higher heart rates were found during both the test and recuperation phases of the squat technique with each of the three loads (p < .05). The heart rate increase was also higher with the 3 kg load than with the 1 kg or 0 kg load (p = .0001). CONCLUSION: The heart rate is lower using the stoop technique for lifting. This may explain why individuals choose the more ergonomically risky stoop technique in everyday lifting tasks.

Biomechanical Phenomena↗
PubMed2000

Comparison of two modes of administration of a personalized quality of life scale in a longitudinal study of total hip arthroplasty.

UNLABELLED: Quality of life scales are being increasingly used to evaluate patients. The earliest scales were standardized questionnaire that did not necessarily provide an optimal evaluation of the quality of life of each individual patient. A number of personalized scales are now available, including the SEIQoL, in which the patients nominate the five quality of life areas most important to them. The SEIQoL has been validated. We tested the SEIQoL in patients treated by total hip arthroplasty, a procedure that is expected to improve quality of life. OBJECTIVE: To compare two methods of administration of the SEIQoL several months after total hip arthroplasty. METHODS: The SEIQoL was administered before and after the arthroplasty. During the postoperative test session, the SEIQoL was administered twice, once using the items nominated preoperatively and once after allowing the patient to repeat the nomination procedure. RESULTS: With both methods, significant improvements in quality of life were demonstrated (P < 0.05). There was no significant difference between the two methods. CONCLUSION: Changing the items of the SEIQoL during prospective studies does not modify the overall quality of life score. Keeping the same items throughout the study is nevertheless warranted.

Hip Prosthesis↗
PubMed1999

[Neuromuscular disease: health care accessibility in the Nord-Pas-de- Calais region].

A survey was conducted to estimate accessibility to current diagnostic techniques for patients with neuromuscular disease living in the Nord-Pas-de-Calais. In association with the "Association française contre les myopathies", we invited 200 adults with neuromuscular disease to fill out a questionnaire concerning diagnosis of their neuromuscular disease and medical and paramedical follow-up. Each subject answered the questionnaire anonymously providing data on sociodemographic items, diagnosis and medical and paramedical follow-up. The results showed a lack of follow-up for lung disease whereas respiratory failure is known as a frequent complication of neuromuscular disease. Genetic counselling was not suggested often enough. A large proportion (80 p. 100) of the patients had had physiotherapy. Whereas cardiomyopathy and orthopedic buckling with subsequent decreased autonomy are observed in 90 p. 100 of patients with Duchenne muscular dystrophy, only 42 p. 100 of the patients with this disease were followed by a cardiologist and a physical therapists. We suggest more cooperation between specialists in order to improve medical care for patients with neuromuscular diseases.

Adult↗
PubMed1990

[Original treatment of a supramalleolar pseudarthrosis in an impaired position].

The authors report the case of a nonunited supra-malleolar fracture with severe angulation in an elderly patient. Poor vascular condition and severe osteoporosis prevented the use of either a surgical approach or internal fixation. Gradual realignment and union were nevertheless achieved within 6 months post operatively using the "Sequoïa" external fixation system, while weight-bearing was continued throughout the course of treatment.

Aged↗
PubMed1988

[Movements of the lumbar spine. A biomechanical study].

The lumbar spine presents movements of flexion-extension, lateral inflexions and rotations, which are, in fact, the result of movements within each mobile spinal segment. These mobile segments present six levels of freedom corresponding to translation and rotation movements in the three spacial planes. Lumbar mobility decreases markedly with age. Muscles not only participate in the movement itself, but also in its control and in maintaining spinal stability. Their action also depends on the effect of gravity. The authors report various studies concerning spinal stresses during varied movements and positions. Flexion of the trunk is the most stressing; walking, rotations and lateral inflexions increase only moderately the intradiscal pressure. All of the these results concur with the classic ergonomic notions.

Abdomen↗
PubMed1987

Relationship between kyphosis, scoliosis, and osteoporosis in the elderly population.

In 56 valid subjects 60 years old or more, bone mineral content (BMC) of the second, third, and fourth lumbar vertebrae and of femoral neck was measured by dual-photon absorptiometry. Dorsal kyphosis and lumbar and dorso-lumbar scoliosis were determined from radiographs using the Cobb methods. Kyphosis was positively correlated with low BMC but not with scoliosis. Scoliosis was positively correlated with femoral neck BMC but not with vertebral BMC.

Aged↗
PubMed1987

Current aspects of osteoarticular pathology in patients undergoing hemodialysis: study of 80 patients. Part 1. Clinical and radiological analysis.

Eighty patients undergoing longterm hemodialysis were evaluated for joint function and radiographic abnormalities. Mean age of the population was 53 years, and mean duration of dialysis was 76 months (24 patients underwent dialysis for more than 10 years). Fifty-eight patients (72%) had joint symptoms; nonspecific arthralgia was the most frequent. Fifteen patients had morning stiffness and interrupted sleep due to arthralgias (shoulders 9, fingers 3) and 10 patients had diminished finger mobility. Radiographic evaluation showed 7 classes of lesions which are not characteristic of renal osteodystrophy or degenerative lesions, including erosive arthropathies of the fingers (8%), multiple carpal bone cysts (10%), cysts of the humeral head (9%), cysts of the hip (11%), erosive spondyloarthropathies (9%), cervical spondylolisthesis (5%) and multiple diaphyseal lacunae (1%). Overall, 42 distinct radiological lesions were observed in a total population of 23 patients. Twenty-nine of these lesions occurred in patients undergoing dialysis for at least 10 years. Certain clinical and radiological patterns were frequently combined after dialysis for more than 10 years: carpal tunnel syndrome, inflammatory joint pain, bone cysts and spondyloarthropathies.

Adult↗