Prosthetic energy return during walking increases after 3 weeks of adaptation to a new device

Many studies have investigated biomechanical differences between prosthetic limbs, but none of the studies adapted to changes over time. Objective measures are needed to quantify the adaptive process of individuals with tibial cutting. Mechanical dynamics and motion curves are the main focus of modern energy storage and return prostheses and efforts are being made to increase the energy recovery of the prosthesis. The energy stored (ie, negative work and positive work) stored by the prosthesis while standing is directly influenced by the user's load strategy, which may be sensitive to changes during adaptation. The purpose of this study was to investigate the change in the mechanical working curve of the lower limb after acclimation to a new prosthetic for 3 weeks.

A retrospective analysis of 22 patients who underwent unilateral shin fibula amputation was performed. Individuals were given a new prosthesis at the current activity level (K 3 and above) and worn for 3 weeks. Kinematics and kinetic measurements were recorded from ground walking during adaptation 0, 5, and 3 weeks adaptation period. Use artificial deformable segment model and 6 degree of freedom model of knee and hip joints to calculate positive and negative work done by prosthesis and voicemelessness.

After 3 weeks, positive work of prosthetic claudication increased by 1% and claudication increased by 7% (p = 0.041, 0.036). There was no significant change in the negative work of the prosthesis or ankle (p = 0.115, 0.192). Self-selective walking speed also increased 1% after 3 weeks (p = 0.038). Our data shows major interdisciplinary differences, some of which track group trends in job profiles, others have opposite trends in the variables of the results.

After three weeks of adjustment, 14 out of 22 patients undergoing iliac amputation increased prosthesis energy recovery. These findings may indicate that individuals can better utilize the spring-like function of the prosthesis after the adaptation period.

The online version of this article (10.1186 / s 12984-018-0347-1) contains supplemental material that can be used by authorized users.

The purpose of this study was to investigate how the prosthetic design designed to increase energy regression affects the mechanism of walking on various slopes (horizontal, uphill, downhill). We used a conventional energy storage and recovery (ESR) foot (ÖssurVari-Flex) and a new ESR artificial foot (ÖssurPro-Flex) (Figure 1). Pro - Flex is designed to increase the fit to the inclined surface of the prosthesis and to increase the energy of the propulsion return 34. By comparing the two types of prosthesis, our aim was to determine the biomechanical effect of prosthetic energy recovery on limb loads on the horizontal, uphill and downhill terrain.

Increase in energy regression of wrong foot affects whole body mechanics when walking on flat ground and slopes

Prosthesis is designed to accumulate energy during the initial posture and release part of the energy during subsequent attitudes. The usefulness of providing more energy returns depends on whether energy is transmitted to help the body advance. This study investigated how the increase in energy regression of the prosthetic foot affects the walking mechanism of various slopes. Five people who underwent unilateral humeral amputation walked a 1 m / s instrument treadmill in three cases (horizontal plane, + 7.5 °, -7.5 °) while wearing prosthetic brace with a new connecting rod . System and traditional energy storage device Hind legs This new foot shows a wider range of movement (p = 0.0012) and returns more energy (p = 0.023) compared to the traditional foot. These data show that this new type of feet can return more energy than traditional prosthetic feet. And this extra energy is used to boost the body's propulsion.

Increase in energy regression of wrong foot affects whole body mechanics when walking on flat ground and slopes