The Effect of Prosthetic Ankle Dorsiflexion Stiffness on Standing Balance and Gait Biomechanics in Individuals with Unilateral Transtibial Amputation.
The Effect of Prosthetic Ankle Dorsiflexion Stiffness on Standing Balance and Gait Biomechanics in Individuals with Unilateral Transtibial Amputation.
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DOI：
10.1097/jpo.0000000000000451
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发表时间：
2022-10-21
影响因子：
0.6
通讯作者：
Gard, Steven A.
中科院分区：
文献类型：
--
作者：
Vaca, Miguel;Stine, Rebecca;Hammond II, Paul;Cavanaugh, Michael;Major, Matthew J.;Gard, Steven A.
方法10个人与单侧经胫骨截肢和归类为最低K3级的步行者参加。使用College Park Venture足部（College Park Industries，Warren，MI，USA），在三种不同水平的踝关节背屈刚度（软、中和硬）下，以三种自选速度进行站立平衡和步态分析。重复测量方差分析（ANOVA）进行相关的站立平衡，步态时空，翻身形状（ROS）的结果。步态动力学和运动学数据进行了分析，使用一维统计参数analysis.ResultsAnkle背屈刚度影响平衡和步态。总体而言，坚实的背屈刚度提供了一个较小的身体摇摆站立平衡，ROS半径接近健全的个人之一，并减少步行时的步长不对称。此外，步行速度有ROS半径的影响，导致在一个较大的半径为缓慢的步行速度和一个较小的为快速步行speeds.DiscussionThe坚定的刚度似乎提供了最大的优势，平衡和步态。在固定条件下，ROS的半径接近健全人的半径，可能通过压力中心的更大进展导致步长对称性的改善，从而导致假体侧的进一步进展。除了观察到的步行速度对ROS半径的影响外，这些信息还鼓励我们开展研究，以检查步行速度对足部性能的影响，并改进假足设计，以在不同的步行速度下保持相同的步态特征。
MethodsTen individuals with unilateral transtibial amputation and categorized as minimum K3-level ambulators participated. Standing balance and gait analyses at three self-selected speeds were performed at three different levels of ankle dorsiflexion stiffness (Soft, Medium, and Firm) using the College Park Venture foot (College Park Industries, Warren, MI, USA). Repeated-measures analyses of variance (ANOVAs) were performed on relevant standing balance, gait spatiotemporal, and roll-over shape (ROS) outcomes. Gait kinetic and kinematic data were analyzed using a one-dimension statistical parametric analysis.ResultsAnkle dorsiflexion stiffness influenced balance and gait. Overall, the Firm dorsiflexion stiffness provided a smaller body sway on standing balance, a ROS radius close to the one of able-bodied individuals, and reduced step length asymmetry while walking. Furthermore, walking speed had an influence on ROS radii, resulting in a larger radius for slow walking speeds and a smaller one for fast walking speeds.DiscussionThe Firm stiffness appeared to offer the most advantages for balance and gait. The radius of ROS under the Firm condition, close to the radius of able-bodied individuals, could have caused the improvement in step length symmetry by a greater progression of the center of pressure, resulting in further progression of the prosthetic side. This information, in addition to the observed walking speed effect on ROS radii, encourages us to develop studies to examine the effect of walking speed on foot performance and improve prosthetic foot design to maintain the same gait characteristics under different walking speeds.
影响因子：
3.7
作者：
Koehler-McNicholas SR;Nickel EA;Barrons K;Blaharski KE;Dellamano CA;Ray SF;Schnall BL;Hendershot BD;Hansen AH
通讯作者：
Hansen AH