Influence of Shoe-heel Height of the Trans-tibial Prosthesis on Static Standing Biomechanics

Li, Xiaobing; Jia, Xin; Peng, Dou; Fang, Lidan

doi:10.1109/iembs.2005.1615657

Cited by 1 publication

(1 citation statement)

References 9 publications

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“…limiting alignment perturbations to avoid undue risk of injury). The magnitude of this deliberately subtle alignment perturbation was also within the "range of acceptable" alignment in other studies 2,3,[24][25][26][27][28] and was therefore believed to not affect subjects in the baseline condition, but when they were exerted. Set screw rotations that produced a 2° plantar-flexion change to each subject's foot were documented and used to rapidly perturb alignment during subsequent experiments.…”

Section: Methodsmentioning

confidence: 81%

Effects of physical exertion on trans-tibial prosthesis users’ ability to accommodate alignment perturbations

Fiedler

Slavens

O’Connor

et al. 2016

Prosthetics &Amp; Orthotics International

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Background It has long been reported that a range of prosthesis alignments is acceptable in trans-tibial prosthetics. This range was shown to be smaller when walking on uneven surfaces. It has also been argued that findings on gait with prostheses that were obtained under laboratory conditions are limited in their applicability to real-life environments. Objectives This study investigated the hypothesis that efforts to compensate for suboptimal alignments by active users of trans-tibial prostheses become less effective when levels of physical exertion increase. Study design A 2 × 2 repeated-measures analysis of variance was conducted to compare the effects of physical exertion and subtle alignment perturbations on gait with trans-tibial prostheses. Methods The gait of eight subjects with trans-tibial amputation was analyzed when walking with two different prosthesis alignments and two different physical exertion levels. The main and interaction effects were statistically evaluated. Results Bilateral step length symmetry and measures of step variability within the same leg were found to be affected by the intervention. There was no significant effect on index variables that combined kinematic or kinetic measures. Conclusion Findings showed that persons with trans-tibial prostheses responded heterogeneously to the interventions. For most variables, the research hypothesis could not be confirmed.

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