Segal Ava D, Orendurff Michael S, Klute Glenn K, McDowell Martin L, Pecoraro Janice A, Shofer Jane, Czerniecki Joseph M
Center of Excellence for Limb Loss Prevention and Prosthetic Engineering, VA Puget Sound Health Care System, 1660 South Columbian Way, Mail Stop 151, Seattle, WA 98108, USA.
J Rehabil Res Dev. 2006 Nov-Dec;43(7):857-70. doi: 10.1682/jrrd.2005.09.0147.
The C-Leg (Otto Bock, Duderstadt, Germany) is a microprocessor-controlled prosthetic knee that may enhance amputee gait. This intrasubject randomized study compared the gait biomechanics of transfemoral amputees wearing the C-Leg with those wearing a common noncomputerized prosthesis, the Mauch SNS (Ossur, Reykjavik, Iceland). After subjects had a 3-month acclimation period with each prosthetic knee, typical gait biomechanical data were collected in a gait laboratory. At a controlled walking speed (CWS), peak swing phase knee-flexion angle decreased for the C-Leg group compared with the Mauch SNS group (55.2 degrees +/- 6.5 degrees vs 64.41 degrees +/- 5.8 degrees , respectively; p = 0.005); the C-Leg group was similar to control subjects' peak swing knee-flexion angle (56.0 degrees +/- 3.4 degrees ). Stance knee-flexion moment increased for the C-Leg group compared with the Mauch SNS group (0.142 +/- 0.05 vs 0.067 +/- 0.07 N"m, respectively; p = 0.01), but remained significantly reduced compared with control subjects (0.477 +/- 0.1 N"m). Prosthetic limb step length at CWS was less for the C-Leg group compared with the Mauch SNS group (0.66 +/- 0.04 vs 0.70 +/- 0.06 m, respectively; p = 0.005), which resulted in increased symmetry between limbs for the C-Leg group. Subjects also walked faster with the C-Leg versus the Mauch SNS (1.30 +/- 0.1 vs 1.21 +/- 0.1 m/s, respectively; p = 0.004). The C-Leg prosthetic limb vertical ground reaction force decreased compared with the Mauch SNS (96.3 +/- 4.7 vs 100.3 +/- 7.5 % body weight, respectively; p = 0.0092).
C型腿假肢（德国杜德施塔特奥托博克公司生产）是一种由微处理器控制的假肢膝关节，可能会改善截肢者的步态。这项个体内随机研究比较了经股骨截肢者佩戴C型腿假肢与佩戴普通非计算机化假肢——莫克SNS假肢（冰岛雷克雅未克奥索公司生产）时的步态生物力学情况。在受试者对每种假肢膝关节有3个月的适应期后，于步态实验室收集典型的步态生物力学数据。在控制步行速度（CWS）下，与莫克SNS组相比，C型腿组在摆动相的膝关节屈曲峰值角度减小（分别为55.2度±6.5度和64.41度±5.8度；p = 0.005）；C型腿组与对照组受试者的摆动相膝关节屈曲峰值角度相似（56.0度±3.4度）。与莫克SNS组相比，C型腿组在支撑相的膝关节屈曲力矩增加（分别为0.142±0.05和0.067±0.07牛·米；p = 0.01），但与对照组受试者相比仍显著降低（0.477±0.1牛·米）。在CWS时，C型腿组的假肢步长比莫克SNS组短（分别为0.66±0.04米和0.70±0.06米；p = 0.005），这使得C型腿组两下肢之间的对称性增加。与莫克SNS假肢相比，受试者佩戴C型腿假肢时行走速度更快（分别为1.30±0.1米/秒和1.21±0.1米/秒；p = 0.004）。与莫克SNS相比，C型腿假肢的垂直地面反作用力降低（分别为体重的96.3±4.7%和100.3±7.5%；p = 0.0092）。
