De Pauw Kevin, Cherelle Pierre, Roelands Bart, Lefeber Dirk, Meeusen Romain
1 Research Group Human Physiology, Faculty of Physical Education and Physical Therapy, Vrije Universiteit Brussel, Brussels, Belgium.
2 Department of Mechanical Engineering, Faculty of Applied Sciences, Vrije Universiteit Brussel, Brussels, Belgium.
Prosthet Orthot Int. 2018 Oct;42(5):504-510. doi: 10.1177/0309364618767141. Epub 2018 Apr 6.
Evaluating the effectiveness of a novel prosthetic device during walking is an important step in product development.
To investigate the efficacy of a novel quasi-passive ankle prosthetic device, Ankle Mimicking Prosthetic Foot 4.0, during walking at different speeds, using physiological determinants in transtibial and transfemoral amputees.
Nonrandomized crossover design for amputees.
Six able-bodied subjects, six unilateral transtibial amputees, and six unilateral transfemoral amputees underwent a 6-min walk test at normal speed, followed by series of 2-min walking at slow, normal, and fast speeds. The intensity of effort and subjective measures were determined. Amputees performed all walking tests on a treadmill with current and novel prostheses. Shapiro-Wilk normality tests and parametric and nonparametric tests were conducted (p < 0.05).
Compared to able-bodied individuals, the rating of perceived exertion levels were significantly elevated in transtibial and transfemoral amputees for both prostheses (p ≤ 0.016). Compared to able-bodied individuals transfemoral amputees also showed significantly elevated heart rate for both prostheses at normal speed (p ≤ 0.043). Within-group comparisons demonstrated that walking with Ankle Mimicking Prosthetic Foot significantly increased the heart rate in transfemoral amputees and transtibial compared to current prosthesis (p = 0.002). Furthermore, transfemoral amputees reached a significantly higher rating of perceived exertion levels.
Intensity of effort during walking with Ankle Mimicking Prosthetic Foot is higher compared to current prostheses. Clinical relevance Ankle Mimicking Prosthetic Foot 4.0 is a novel quasi-passive ankle prosthesis with state-of-the-art technological parts. Subjective measures show the importance of this technology, but the intensity of effort during walking still remains higher compared to current passive prostheses, especially in transfemoral amputees.
评估一种新型假肢装置在行走过程中的有效性是产品开发的重要一步。
利用经胫和经股截肢者的生理指标，研究一种新型准被动踝关节假肢装置——仿踝假肢4.0在不同速度行走时的功效。
针对截肢者的非随机交叉设计。
6名健全受试者、6名单侧经胫截肢者和6名单侧经股截肢者先以正常速度进行6分钟步行测试，随后依次以慢、正常和快速度进行一系列2分钟步行测试。测定用力强度和主观指标。截肢者使用当前和新型假肢在跑步机上完成所有步行测试。进行了夏皮罗-威尔克正态性检验以及参数和非参数检验（p < 0.05）。
与健全个体相比，两种假肢在经胫和经股截肢者中的主观用力程度评分均显著升高（p≤0.016）。与健全个体相比，经股截肢者在正常速度下使用两种假肢时心率也显著升高（p≤0.043）。组内比较表明，与当前假肢相比，使用仿踝假肢行走时经股截肢者和经胫截肢者的心率显著增加（p = 0.002）。此外，经股截肢者的主观用力程度评分显著更高。
与当前假肢相比，使用仿踝假肢行走时的用力强度更高。临床意义 仿踝假肢4.0是一种具有先进技术部件的新型准被动踝关节假肢。主观指标显示了这项技术的重要性，但与当前被动假肢相比，行走时的用力强度仍然更高，尤其是在经股截肢者中。
