モデル解析による股関節疾患患者の歩行の力学的解析(3部運動の解析)

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Mathematical model analysis was carried out on the gait of patients with hip diseases in order to clarify the patients' gait characteristics which were not obtainable by usual techniques. Motion in the sagittal plane was noted, and a two-dimensional mathematical model developed by Yamazaki was used. For the anthropometrical measurements, 'contour maps' were used bucause patients' body proportions were different from the norm. Displacement was measured by PSD camera simultaneous to floor reaction force measurements and these were transmitted to mini-computer by on-line real-time processing. Subjects were 17 patients with hip osteoarthritis (11 for total hip replacement, 1 for hemi-prosthetic reconstruction, 3 for osteotomy, and 2 for arthrodesis of the hip); 4 normal subjects were measured for control. Joint moments, muscle forces, and joint reaction forces were assumed by mathematical model analysis. In order to investigate the validity of measurements and analysis, joint reaction forces of normal subjects were compared with results of other researchers and good agreement was obtained. For the patients with total hip replacement, the maximum value of hip joint reaction force was almost the same as that of the normal subjects, but the duration for which the large force was transmitted was longer than for normal subjects. Also, it became evident that the large force was transmitted to the knee joint in the push-off phase. These were common characteristics of patients for hemi-prosthetic reconstruction and osteotomy, and it can be said that they provide compensation for the instability of hip and knee joints. In patients with arthrodesis of the hip, the maximum values of reaction force with contralateral hip joint and bilateral knee joints revealed about twice the normal value. Thus, it is evident that it is necessary to discuss the durability of these joints when the procedure for arthrodesis of the hip is applied.
バイオメカニズム学会の論文
1984-04-25

モデル解析による股関節疾患患者の歩行の力学的解析(3部運動の解析)

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モデル解析による股関節疾患患者の歩行の力学的解析(3部 運動の解析)

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モデル解析による股関節疾患患者の歩行の力学的解析(3部運動の解析)