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Predicting Pressure Distribution Between Transfemoral Prosthetic Socket And Residual Limb Using Finite Element Analysis
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Book Synopsis Predicting Pressure Distribution Between Transfemoral Prosthetic Socket and Residual Limb Using Finite Element Analysis by : Rajesh Surapureddy
Download or read book Predicting Pressure Distribution Between Transfemoral Prosthetic Socket and Residual Limb Using Finite Element Analysis written by Rajesh Surapureddy and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, a non-linear Finite Element (FE) model was created and analyzed to determine the pressure distribution between the residual limb and the prosthetic socket of a transfemoral amputee. This analysis was performed in an attempt to develop a process allowing healthcare providers and engineers to simulate the fit and comfort of transfemoral prosthetics to reduce the number of re-fittings needed for the amputees. The analysis considered the effects of interference due to insertion of the limb into the prosthesis, referred to as donning, and also the effects due to the body weight of the amputee. A non-linear finite element static implicit analysis method was utilized. This analysis implemented multiple finite element techniques, including geometric non-linearity due to large deflections, non-linear contacts due to friction between the contact surfaces of the residual limb and the socket, and non-linear hyper-elastic material properties for the residual limb's soft tissue. This non-linear static analysis was carried out in two time-steps. The first step involved solving the interference fit analysis to study the pre-stresses developed due to the effect of donning. The donning process results in soft tissue displacement to accommodate the internal geometry of the prosthesis. In the second load application time-step, an additional load of half the person's body weight was applied to the femur. The maximum normal stress (contact pressure) of 84 kPa was observed due to the combined effect of the donning procedure and body weight application, comparable to the studies performed by other researchers. The procedure developed through this work can be used by future researchers and prosthetic designers in understanding how to better design transfemoral prosthesis.
Book Synopsis Design and Verification of a Finite Element Analysis Model for Predicting Deflection of Actively Actuated Prosthetic Sockets by : Rafael Rodriguez
Download or read book Design and Verification of a Finite Element Analysis Model for Predicting Deflection of Actively Actuated Prosthetic Sockets written by Rafael Rodriguez and published by . This book was released on 2011 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: A lower limb prosthesis provides assistance to its user in both ambulation and stationary support. The lower limb prosthesis consists of a socket, which interfaces with the residual limb, a pylon, attachment hardware to secure the pylon to the socket, and a prosthetic foot. For the prosthesis to be effective, the socket must be comfortable, functional and aesthetically appealing, usually in that order. Lack of comfort and fit can cause movement problems and health issues. The residual limb of the amputee changes its volume throughout the day and in order to maintain comfort a socket must be able to adapt to these volume changes. Previous research has resulted in the development of concepts for inflatable prosthetic sockets capable of addressing this need. The concepts rely on laser sintering (LS) to manufacture the parts. This research focuses on the development of a finite element analysis (FEA) method to assist in the design of adaptive sockets. The FEA can be used to predict the pressure-deflection curve of a given socket design. The FEA method was verified by experiments using LS manufactured test specimens. Results from FEA simulations indicate that the LS-manufactured sockets will achieve the desired deflection (~0.1 in) for relatively low pressures (
Book Synopsis Development of a Biomechancial Model of the Interface Between the Residual Limb and Prosthesis for Trans-femoral Amputees by : V.S.P Lee
Download or read book Development of a Biomechancial Model of the Interface Between the Residual Limb and Prosthesis for Trans-femoral Amputees written by V.S.P Lee and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stress Distribution and Optimum Design of Polypropylene and Laminated Transtibial Prosthetic Sockets. FEM and Experimental Implementations by : Hayder Al-Shuka
Download or read book Stress Distribution and Optimum Design of Polypropylene and Laminated Transtibial Prosthetic Sockets. FEM and Experimental Implementations written by Hayder Al-Shuka and published by GRIN Verlag. This book was released on 2018-02-08 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific Study from the year 2017 in the subject Medicine - Other, , language: English, abstract: This study presents analyses for below knee prosthetic socket of a human. Socket stress distribution is performed on three types of socket, polypropylene (5mm), polypropylene (3mm) and a standard laminate (3mm) sockets to determine the stresses path through the prosthetic socket during the gait cycle. It is found that heel strike phase is the critical phase. The stresses increase at the socket base while the maximum deflection is maximum at the patellar region of the socket. This work is achieved by finite element program, ANSYS. The development of design specifications of a below the knee prosthetic socket is presented in this study for successful ambulation and comfort. Seven different design models are created by changing the socket wall thickness and the material. Polypropylene socket gives the best results with regard to the allowable deflection for the regions of the pressure relief areas of the stump. The effect of varying the modulus of elasticity on the polypropylene socket is considered in this study. Three models are analyzed with different tensile creep moduli during different periods. It is found that the polypropylene socket will enlarge in size with time. An experimental study is conducted to compare the strength of five prosthetic sockets made of different materials. Compression, three-point flexural and tensile tests are implemented by the Testometric machine. The laminate sockets have larger compressive stiffness than polypropylene while polypropylene has larger flexural stiffness than the tested laminates except for socket No.5.
Book Synopsis Finite Element Formulation of Contact Between a Residual Limb and a Trans-tibial Prosthetic Socket by : Rohan Goud Chandrashekar
Download or read book Finite Element Formulation of Contact Between a Residual Limb and a Trans-tibial Prosthetic Socket written by Rohan Goud Chandrashekar and published by . This book was released on 2006 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Academy of Orthopaedic Surgeons Publisher :Amer Academy of Orthopaedic ISBN 13 :9780892032754 Total Pages :930 pages Book Rating :4.0/5 (327 download)
Book Synopsis Atlas of Limb Prosthetics by : American Academy of Orthopaedic Surgeons
Download or read book Atlas of Limb Prosthetics written by American Academy of Orthopaedic Surgeons and published by Amer Academy of Orthopaedic. This book was released on 2002-01-01 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt: Newly available after being out of print for several years, this is the definitive reference on the surgical and prosthetic management of acquired or congenital limb loss. Covers indications for amputation vs. limb salvage for trauma, peripheral vascular disease, and tumours; indications for prostheses for amputation levels; and rehabilitation approaches.
Book Synopsis Journal of Rehabilitation R & D by :
Download or read book Journal of Rehabilitation R & D written by and published by . This book was released on 1997 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Use of a Novel Residuum Model to Design a Variable-impedance Transtibial Prosthetic Socket by : David Moinina Sengeh
Download or read book The Use of a Novel Residuum Model to Design a Variable-impedance Transtibial Prosthetic Socket written by David Moinina Sengeh and published by . This book was released on 2016 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: For people living with limb amputation, the prosthetic socket - the interface between the residuum and prosthesis - is the most critical component. When a socket is uncomfortable, especially due to poor fit, the quality of life for a patient is greatly hindered. However, conventional design of sockets is largely artisan, with limited input of quantitative data. Current computer-aided and manufacturing (CAD/CAM) designs are still not clinically applicable solutions. Due to model identification procedures that employ non patient-specific and incomplete data sets, today's finite element (FE) models of the residuum are not predictive, leading to suboptimal socket designs. As such, there exists a need for a comprehensive biomechanical model of the residuum for the quantitative design and computational evaluation of patient-specific prosthetic sockets. This thesis presents a combined experimental-numerical approach to evaluate and validate a transtibial residuum biomechanical model. The central hypothesis of the work is that a single biomechanical model can predict the large non-linear response at various sites on a residuum under load. To evaluate this hypothesis, a non-linear, two-tissue model was formulated where tissue geometries were defined using MRI data of the residuum. The non-linear viscoelastic material parameters of the model were identified through inverse FEA-based optimization using in-vivo indentation experimental data at four locations. Using optimized model tissue parameters, the mean percentage error (mean absolute error/ maximum experimental force) between the experimental and simulation force-time curves at 14 other locations across the evaluated transtibial residuum was 7 ± 3%. Using this same modeling methodology and a single set of material constants to describe the bulk soft tissue biomechanical response of seven distinct transtibial residual limb models, the average percentage error for indentations at multiple locations across all seven limbs was 7 ± 1%. From these predictive models of residuum limbs, one rigid novel socket and two multimaterial transtibial sockets were designed, fabricated and evaluated through an entirely quantitative, automated and repeatable methodology. In a preliminary clinical investigation, the novel sockets were shown to reduce peak contact pressures at the tibia and fibular head regions on the residuum by significant amounts during standing compared to a conventional socket interface designed and fabricated by a trained prosthetist.
Book Synopsis Journal of Rehabilitation Research & Development by :
Download or read book Journal of Rehabilitation Research & Development written by and published by . This book was released on 2001 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Synergistic Approach to Transtibial Socket Interface Mechanics by : Amy Lorraine Lenz
Download or read book A Synergistic Approach to Transtibial Socket Interface Mechanics written by Amy Lorraine Lenz and published by . This book was released on 2017 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Finite Element Analysis of the Interfaces Between the Muscles of the Residual Limb in Trans-femoral Amputees by : Peer Gross
Download or read book A Finite Element Analysis of the Interfaces Between the Muscles of the Residual Limb in Trans-femoral Amputees written by Peer Gross and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rehabilitation R & D Progress Reports by :
Download or read book Rehabilitation R & D Progress Reports written by and published by . This book was released on 1997 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Digital Human Modeling by : Sofia Scataglini
Download or read book Advances in Digital Human Modeling written by Sofia Scataglini and published by Springer Nature. This book was released on 2023-07-18 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on advances in human modeling techniques, covering cutting-edge algorithms and their practical implementation in health and medicine, automotive, clothing, virtual reality simulations, robotics, and assistive technologies. Gathering the proceedings of the 8th International Digital Human Modeling Symposium, held on September 4-6, 2023, in Antwerp, Belgium, it offers a timely snapshot on interdisciplinary, applied research, at the interface between computer science, ergonomics, engineering, design, health and technologies.
Book Synopsis Two-dimensional Finite Element Analysis of the Transfemoral Residual Limb by : Stuart Andrew Taylor Griffiths
Download or read book Two-dimensional Finite Element Analysis of the Transfemoral Residual Limb written by Stuart Andrew Taylor Griffiths and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparison of the Compression Release and Ischial Containment Transfemoral Prosthetic Socket Designs Using Gait Analysis by : Mohammed Mustafa Kamil
Download or read book Comparison of the Compression Release and Ischial Containment Transfemoral Prosthetic Socket Designs Using Gait Analysis written by Mohammed Mustafa Kamil and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traditional transfemoral prosthetic socket designs share many challenges. Prosthetic sockets enclose the residual limb and connect to other parts of the prosthesis to facilitate control and promote a more natural gait pattern by the user. One of the main challenges is to create stability between the residual femur and the prosthetic socket, thus improving efficiency and comfort whilst reducing gait deviations.Established designs such as the ischial containment socket (ICS); purport to reduce femoral abduction by containing the medial aspect of the ischium in counterforce to the greater trochanter and femoral shaft. This design relies on a proximal 'bony lock' to limit femoral abduction at mid stance within the prosthesis. A new design of socket named the compression/release socket (CRS), however, uses three or more 'compression' regions between the femoral bone and the socket walls to minimise femoral motion. The CRS design claims to improve the gait pattern of the user through enhanced distal femoral stability and socket control. Despite minimal evidence being available, the design is currently being introduced in clinics worldwide.The aim of this research is to compare the stabilisation achieved in two transfemoral prosthetic socket designs by identifying and measuring the effect on the user using appropriate gait parameters. Initially, a literature review was conducted to establish understanding of normal and prosthetic gait. Literature was then examined to establish historical prosthetic transfemoral socket concepts and the biomechanics underpinning currently accepted designs. Due to the difficulty in obtaining participants appropriately fitted with the CRS sockets, this project has been presented as a feasibility study. Two designs of sockets were then compared: ICS versus CRS design. The gait of one subject with transfemoral amputation was assessed whilst wearing both sockets in a gait laboratory. Important kinematic and spatial temporal parameters, identified in the literature review, were compared for both socket designs under a variety of challenging walking conditions (level, downhill, uphill and cross slope walking). Comparison was also made between the amputated and contralateral side for each socket design. Results indicate that, kinematic parameters did not demonstrate large variations, but that some variation was found between prostheses when measuring hip abduction, hip flexion, knee flexion and ankle plantar flexion in both the prosthetic and contralateral limbs. When using the CRS design, user range of motion for the hip joint appeared to be greater than that of the ICS. Step length and step width on both sides were closely matched in both socket designs. Preliminary study results indicate that alteration in the step length or width did not reduce the velocity of gait, but was more likely to result from change of strategy by the participant to ensure greater control over balance or stability. Further research with a greater number of participants is required to investigate the effect of socket design on stability and gait parameters in the future.
Book Synopsis Journal of Rehabilitation Research and Development by :
Download or read book Journal of Rehabilitation Research and Development written by and published by . This book was released on 1997 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Prediction and Experimental Verification of Residual Limb/prosthetic Socket Interface Pressures for Below-knee Amputees by : M. Barbara Silver-Thorn
Download or read book Prediction and Experimental Verification of Residual Limb/prosthetic Socket Interface Pressures for Below-knee Amputees written by M. Barbara Silver-Thorn and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
