Mobility function of a prosthetic knee joint with an automatic stance phase lock

被引:31
作者
Andrysek, Jan [1 ]
Klejman, Susan [1 ]
Torres-Moreno, Ricardo [1 ]
Heim, Winfried [2 ]
Steinnagel, Bryan [1 ]
Glasford, Shane [1 ]
机构
[1] Holland Bloorview Kids Rehabil Hosp, Toronto, ON M4G 1R8, Canada
[2] Sunnybrook Ctr Independent Living, Toronto, ON, Canada
基金
加拿大健康研究院;
关键词
Developing countries; gait; prosthetic design; rehabilitation of amputees; stance phase control; MICROPROCESSOR CONTROL; AMPUTEES; WALKING; GAIT; PERFORMANCE; TECHNOLOGIES; CONSUMPTION; PREFERENCE; LEVEL; COST;
D O I
10.1177/0309364611408495
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
摘要
Background: There is a need for a prosthetic knee joint design that is technologically and functionally appropriate for use in developing countries. Objectives: To develop and clinically evaluate a new type of stance phase controlled prosthetic knee joint that provides stance phase stability without inhibiting swing phase flexion. Study design: A crossover repeated measures study design comparing the new knee joint to the participant's conventional low- or high-end prosthetic knee joint. Methods: The new knee joint was fitted to fourteen individuals aged 15 to 67 years with unilateral lower limb amputations. Walk tests were performed to measure walking speed. Energy expenditure was estimated using the physiological cost index (PCI). Results: Walking speeds with the new knee joint were on average 0.14 m/s faster than conventional low-end knees (p < 0.0001), but 0.07 m/s slower than conventional high-end prosthetic knees (p = 0.008). The PCI was similar across all three knee joint technologies (p = 0.276). Conclusions: Mobility function with the new knee joint, in terms of walking speed, was more closely matched to high-end than low-end prosthetic knee joints. Therefore, given its relatively simple design, the new stance phase control mechanism may offer a functional and cost effective solution for active transfemoral amputees.
引用
收藏
页码:163 / 170
页数:8
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