Effects of prosthetic foot forefoot flexibility on oxygen cost and subjective preference rankings of unilateral transtibial prosthesis users
Effects of prosthetic foot forefoot flexibility on oxygen cost and subjective preference rankings of unilateral transtibial prosthesis users
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DOI：
10.1682/jrrd.2010.01.0003
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发表时间：
2010-01-01
影响因子：
--
通讯作者：
Edwards, Mark
中科院分区：
文献类型：
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作者：
Klodd, Elizabeth;Hansen, Andrew;Edwards, Mark
研究人员进行了一项双盲随机交叉研究，以确定13名单侧经胫骨假体使用者的假肢前足灵活性对氧气消耗和主观偏好排名的影响。制造了五只实验脚用于研究：F1、F2、F3、F4和F5。F1是最灵活的，F5是最不灵活的，和F3的设计，以符合仿生踝足翻转形状。实验脚是仿照Shape&Roll假肢脚（最初由伊利诺斯州芝加哥的西北大学生产;现在在公共领域），但在前脚构件内有不同数量的锯切，允许在行走过程中或多或少的灵活性。参与者在跑步机上以相同的舒适，自由选择的速度行走，每只脚7分钟，同时测量能量消耗。不同足部之间的耗氧量（mL O-2/kg/m）无显著差异（p = 0.17），使用顺序也无显著差异（p = 0.94）。然而，偏好排名受到足部灵活性的显著影响（p = 0.002），最灵活的足部（F1）排名显著低于足部F3（p = 0.003）和F4（p = 0.004）。用户可能更喜欢与完整踝足系统的灵活性相匹配的假肢脚，即使我们没有发现在自由选择的速度下的能量益处。
The investigators conducted a double-blind randomized crossover study to determine the effects of prosthetic foot forefoot flexibility on oxygen cost and subjective preference rankings of 13 unilateral transtibial prosthesis users. Five experimental feet were fabricated for use in the study: F1, F2, F3, F4, and F5. F1 was most flexible, F5 was least flexible, and F3 was designed to conform to a biomimetic ankle-foot roll-over shape. The experimental feet were modeled after the Shape&Roll prosthetic foot (originally produced by Northwestern University, Chicago, Illinois; now in public domain) but had different numbers of saw cuts within the forefoot members, allowing more or less flexibility during walking. Participants walked at the same comfortable, freely selected speed on the treadmill for 7 min with each foot while energy expenditure was measured. No significant difference was found in oxygen cost (mL O-2/kg/m) between the different feet (p = 0.17), and the order of use was also not significant (p = 0.94). However, the preference ranking was significantly affected by the flexibility of the feet (p = 0.002), with the most flexible foot (F1) ranking significantly poorer than feet F3 (p = 0.003) and F4 (p = 0.004). Users may prefer prosthetic feet that match the flexibility of an intact ankle-foot system, even though we did not detect an energetic benefit at freely selected speeds.