Torburn L, Schweiger G P, Perry J, Powers C M
Rancho Los Amigos Medical Center, Pathokinesiology Laboratory, Downey, California 90242.
Clin Orthop Relat Res. 1994 Jun(303):185-92.
The purpose of this study was to compare the stride characteristics provided by four of the new dynamic elastic response prosthetic feet and the SACH foot to determine if any of them provided an increased performance during stair ambulation. Ten traumatic below-knee amputees were studied; each of them tested all five prosthetic feet (Flex-Foot, Carbon Copy II, Seattle, Quantum, and SACH). Compression closing footswitches were used to calculate stride characteristics while ascending and descending a four-step staircase. The only significant difference between feet was found during the initial double-limb support (IDLS) phase of stair ascent, with the Flex-Foot providing a more symmetrical amputated:sound limb IDLS ratio compared with the SACH foot (1.03 versus 1.30). The increased IDLS time seen with the SACH foot reflects the inability to adequately advance the tibia and body weight over the prosthetic foot to achieve progression. This lack of progression and symmetrical gait pattern between limbs may be a function of the limited dorsiflexion range inherent with the SACH foot.
本研究的目的是比较四种新型动态弹性响应假肢脚和SACH脚所提供的步幅特征，以确定它们在楼梯行走过程中是否能提高性能。对10名创伤性膝下截肢者进行了研究；他们每人都测试了所有五种假肢脚（Flex-Foot、Carbon Copy II、Seattle、Quantum和SACH）。在上下四级楼梯时，使用压缩闭合脚踏开关来计算步幅特征。在楼梯上升的初始双支撑期（IDLS）阶段，发现不同假肢脚之间唯一显著的差异是，与SACH脚相比，Flex-Foot提供了更对称的截肢侧与健侧IDLS比率（1.03对1.30）。SACH脚出现的IDLS时间增加反映了无法将胫骨和体重充分向前推进到假肢脚上以实现前进。四肢之间这种缺乏前进和对称步态模式可能是SACH脚固有的背屈范围有限的结果。
