نتایج جستجو برای: foot prosthesis

تعداد نتایج: 82007  

Journal: :iranian rehabilitation journal 0
zahra safaeepour university of social welfare and rehabilitation sciences, tehran, iran ali esteki shahid beheshti university of medical sciences, tehran, iranسازمان اصلی تایید شده: دانشگاه علوم بهزیستی و توانبخشی (university of social welfare and rehabilitation sciences) abdollah shamloo islamic azad university, science and research branch, tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) farhad tabatabai university of social welfare and rehabilitation sciences, tehran, iranسازمان اصلی تایید شده: دانشگاه آزاد اسلامی تهران مرکز (islamic azad university of tehran central)

objectives: this paper describes further improvement and preliminarily evaluation of a novel viscoelastic ankle-foot prosthesis prototype. the objective was to control the ankle hysteresis at slow and normal walking speeds. methods: inspired by the ankle biomechanics, in which the hysteresis differs based on the gait speeds, a manually damping control mechanism imbedded in the prosthesis for ad...

2016
Houman Dallali Evandro Ficanha Mohammad Rastgaar Aagaah

The first step to study and develop a two Degrees of Freedom (DOF) prosthesis is to derive a dynamic model for simulation and control design. In this paper, the ankle-foot prosthesis has controllable Dorsi-Plantarflexion (DP) and Inversion-Eversion (IE) DOF. We derive a compliant dynamic model for a recently developed ankle-foot prosthesis followed by identification of the actuators, transmissi...

Journal: :Journal of rehabilitation research and development 1991
S G Kabra R Narayanan

A load deflection and a cyclic loading apparatus capable of measuring dorsiflexion/plantarflexion, pronation/supination, internal/external rotation, and cyclic dorsiflexion (60 cycles per minute) of ankle-foot prostheses are described. A test protocol was developed to assess the functional parameters of the Jaipur ankle-foot prosthesis before and after prolonged cyclic loading, with the simulta...

Journal: :Prosthetics and orthotics international 1983
N E Doane L E Holt

The gait patterns of unilateral below-knee amputees wearing prostheses with either a SACH foot or a single axis foot were compared. A temporary below-knee prosthesis was fabricated for each subject using plaster of Paris and Plastazote for the socket, a pylon and an artificial foot. Eight subjects were filmed at two separate sessions, one in which the SACH foot was worn on their prosthesis and ...

Objectives: This paper describes further improvement and preliminarily evaluation of a novel viscoelastic ankle-foot prosthesis prototype. The objective was to control the ankle hysteresis at slow and normal walking speeds. Methods: Inspired by the ankle biomechanics, in which the hysteresis differs based on the gait speeds, a manually damping control mechanism imbedded in the prosthesis for...

ژورنال: توانبخشی 2019

Objective Diabetic foot ulcers are significant complications of diabetes that can lead to amputation. Partial foot prostheses can be used to redistribute the plantar pressure on the residual limb to alleviate local pressures and prevent re-amputation at more proximal levels. The current study aimed to describe the fabrication of an original silicone foot prosthesis designed for a diabetic patie...

Journal: :Proceedings in applied mathematics & mechanics 2021

In this work, we present a model for human leg with prosthetic foot, consisting of rigid bodies the thigh and shank geometrically exact beam prosthesis. The prosthesis is modelled after Össur Vari-Flex® carbon spring foot. individual are connected by joints imposing constraints, mimicking motions joints. A structure preserving variational integrator used to calculate forward dynamic simulation ...

2017
Sara R Koehler-McNicholas Eric A Nickel Joseph Medvec Kyle Barrons Spencer Mion Andrew H Hansen

In recent years, numerous prosthetic ankle-foot devices have been developed to address the demands of sloped walking for individuals with lower-limb amputation. The goal of this study was to compare the performance of a passive, hydraulic ankle-foot prosthesis to two related, non-hydraulic ankles based on their ability to minimize the socket reaction moments of individuals with transtibial ampu...

Journal: :Journal of rehabilitation research and development 2011
Michael P Dillon Stefania Fatone Andrew H Hansen

Investigations into the gait of persons with partial foot amputation (PFA) suggest that the effective foot length can be restored when the prosthesis incorporates a relatively stiff forefoot, restricts dorsiflexion, and includes a mechanism whereby forces caused by loading the toe lever can be comfortably distributed to the leg (e.g., an anterior tibial shell). The purpose of this investigation...

Journal: :فصلنامه علمی پژوهشی مهندسی مکانیک جامدات واحد خمینی شهر 0
دامون بختیاریان دانشجوی کارشناسی ارشد، دانشکده مکانیک، دانشگاه شهرکرد هادی همایی دانشیار، دانشکده مکانیک، دانشگاه شهرکرد امین ملکی زاده دانشجوی دکتری، دانشکده مهندسی، دانشگاه امیرکبیر مراد شهبازی تک آبی کارشناس ارشد، فارق التحصیل دانشگاه امیر کبیر

the need for simulation of human foot mechanism has made researchers and engineers move towards different patterns to describe this movement. in this regard, optimal solutions such as energy consumption, accuracy, etc. are of utmost importance. in this paper, efforts have been made to present a new solution by designing a fully two-dimensional six-bar mechanism with one degree of freedom so tha...

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