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Achilles tendon rupture
Published in Maneesh Bhatia, Essentials of Foot and Ankle Surgery, 2021
Manuel Monteagudo, Pilar Martínez de Albornoz
Nonoperative management is only be indicated in low-demand patients or in those who cannot tolerate surgery. In those cases, a carbon composite ankle-foot orthosis may allow for keeping the foot up during swing phase, a soft heel strike, and stability in stance and a better toe-off.
The paralysed knee
Published in Benjamin Joseph, Selvadurai Nayagam, Randall Loder, Ian Torode, Paediatric Orthopaedics, 2016
A floor-reaction orthosis (FRO) (Figure 55.4a) or a knee-ankle–foot orthosis (KAFO) with a knee lock (Figure 55.4b) can be used to stabilise the knee. Carbon-composite orthoses are much lighter that traditional metal and leather orthoses and this reduces the energy expenditure while walking.3 The FRO has the advantages of leaving the knee unlocked during the swing phase of gait and permitting knee flexion while sitting down without having to manipulate a knee lock.4
The effect of Knee-Ankle-Foot orthosis stiffness on the parameters of walking
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2018
Sayed Mohammad Ali Abtahi, Nima Jamshidi, Aram Ghaziasgar
It is impossible to enhance the energy storage capacity of carbon by using carbon composite materials. Such a design would improve the strength of the orthosis, resulting in a lighter device. As a result, the upper level in the dynamic response is optimized and the energy return in the third rocker is significantly increased (Danielsson and Sunnerhagen 2004; Wolf et al. 2008; Bregman et al. 2012). The energy cost of walking is obtained by measuring the oxygen consumption (Bleyenheuft et al. 2008). The accurate model in human walking based on anthropometric variables can be adapted to reach a reliable biomechanical model of human body. The net force and the net torque resulting from the performance of the muscles that lead to a specific movement are considered by this model. These variables are not directly measurable. The force of each muscle is obtained by a mathematical model of the muscle (Jamshidi et al. 2009a, 2009b).