Bennett R L, DeCamp C E, Flo G L, Hauptman J G, Stajich M
Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing 48824, USA.
Am J Vet Res. 1996 Jul;57(7):966-71.
To define alterations of movement in dogs with hip dysplasia by use of noninvasive, 3-dimensional, computer-assisted kinematic gait analysis.
Kinematic and force plate data were collected at the trot from clinically normal dogs and from dogs with hip dysplasia.
12 large adult dogs of various breeds with clinical and radiographic evidence of hip dysplasia, and 12 clinically normal adult large dogs of various breeds with body weight similar to that of the dogs with hip dysplasia.
Dynamic flexion and extension angles and angular velocities were calculated for the coxofemoral, femorotibial, and tarsal joints. Temporal and distance variables were also computed. Essential Fourier coefficients were determined and used to reconstruct mean dynamic flexion and extension curves for all joints, and to compare differences in movement between dogs with hip dysplasia and clinically normal dogs.
Dogs with hip dysplasia had subtle characteristic changes in dynamic flexion and extension angles and angular velocities of each joint, verified by significant differences in essential Fourier coefficients between the 2 study groups. Stride length was increased and peak vertical force was decreased in dogs with hip dysplasia. Subject velocity, maximal foot velocity, stance duration, stride frequency, and impulse area did not differ between the 2 groups.
Kinematic gait analysis indicated that hip dysplasia is associated with alterations in movement of the coxofemoral, femorotibial, and tarsal joints. Computer-assisted kinematic gait analysis provided a noninvasive, objective tool with which to evaluate these complex motion alterations.
The information obtained may be useful in future evaluations of various modes of treatment for hip dysplasia.
通过使用非侵入性的三维计算机辅助运动步态分析来确定患有髋关节发育不良的犬类运动的改变。
在小跑时收集临床正常犬和患有髋关节发育不良犬的运动学和测力板数据。
12只不同品种的成年大型犬，有髋关节发育不良的临床和放射学证据，以及12只临床正常的成年大型犬，品种各异，体重与患有髋关节发育不良的犬相似。
计算髋关节、股胫关节和跗关节的动态屈伸角度和角速度。还计算了时间和距离变量。确定基本傅里叶系数，并用于重建所有关节的平均动态屈伸曲线，以及比较患有髋关节发育不良的犬和临床正常犬之间的运动差异。
患有髋关节发育不良的犬在每个关节的动态屈伸角度和角速度上有细微的特征性变化，这通过两个研究组之间基本傅里叶系数的显著差异得到证实。患有髋关节发育不良的犬步长增加，垂直峰值力降低。两组之间的受试者速度、最大足部速度、站立持续时间、步频和冲量面积没有差异。
运动步态分析表明，髋关节发育不良与髋关节、股胫关节和跗关节的运动改变有关。计算机辅助运动步态分析提供了一种非侵入性的客观工具，可用于评估这些复杂的运动改变。
所获得的数据可能对未来评估髋关节发育不良的各种治疗方式有用。
