Effect of prosthetic alignment changes on socket reaction moment impulse during walking in transtibial amputees

JOURNAL OF BIOMECHANICS

卷:47

Article

Kobayashi, Toshiki¹  Orendurff, Michael S.¹  Arabian, Adam K.²  Rosenbaum-Chou, Teri G.¹  Boone, David A.¹ 

[1] Orthocare Innovat, Mountlake Terrace, WA 98043 USA

[2] Seattle Pacific Univ, Dept Comp Sci & Engn, Seattle, WA USA

关键词: Amputation;    Direct measurement;    Gait;    Knee adduction moment impulse;    Osteoarthritis;   

DOI  :  10.1016/j.jbiomech.2014.02.012

来源: Elsevier

【 摘 要 】

The alignment of a lower limb prosthesis affects the way load is transferred to the residual limb through the socket, and this load is critically important for the comfort and function of the prosthesis. Both magnitude and duration of the moment are important factors that may affect the residual limb health. Moment impulse is a well-accepted measurement that incorporates both factors via moment-time integrals. The aim of this study was to investigate the effect of alignment changes on the socket reaction moment impulse in transtibial prostheses. Ten amputees with transtibial prostheses participated in this study. The socket reaction moment impulse was measured at a self-selected walking speed using a Smart Pyramid (TM) in 25 alignment conditions, including a nominal alignment (clinically aligned by a prosthetist), as well as angle malalignments of 2 degrees, 4 degrees and 6 degrees (abduction, adduction, extension and flexion) and translation malalignments of 5 mm, 10 mm and 15 mm (lateral, medial, anterior and posterior). The socket reaction moment impulse of the nominal alignment was compared for each condition. The relationship between the alignment and the socket reaction moment impulse was clearly observed in the coronal angle, coronal translation and sagittal translation alignment changes. However, this relationship was not evident in the sagittal angle alignment changes. The results of this study suggested that the socket reaction moment impulse could potentially serve as a valuable parameter to assist the alignment tuning process for transtibial prostheses. Further study is needed to investigate the influence of the socket reaction moment impulse on the residual limb health. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

Free