Evaluation of the Effects of Geometrical Changes in Prosthetic Socket Towards Transfemoral Residuum via Finite Element Method

Jamaludin, Mohd Syahmi; Hanafusa, Akihiko; Yamamoto, Shuichiro; Agarie, Yukio; Otsuka, Hiroshi; Onishi, Kengo

doi:10.1109/iecbes.2018.8626703

Cited by 4 publications

(7 citation statements)

References 11 publications

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“…The selection of different shapes between the residuum and socket model increased the tendency of the residuum geometrical deformation. During the complete donning stage, a high amount of volume deformation occurred in the proximal area because the prosthetic socket was created using a small cross-section in the proximal area to allow the socket to fit the subject residuum well [11]. The shrinking of the residuum increased the pressure occurring in the proximal area.…”

Section: Discussionmentioning

confidence: 99%

“…A comparison of the results of the proximal and distal areas showed that the pressure distribution on the surface of the proximal area in both the MCCT and UCLA sockets was higher than in the distal area. The results showed that the prosthetic socket was designed to minimize the pressure in the distal area such that the postoperation wound and scars in the residuum would not be affected, while at the same time the pressure in the proximal area was maximized to make the socket properly fit the subject's residuum [11].…”

Section: Discussionmentioning

confidence: 99%

“…The other IRC was a manual compression casting technique (MCCT) socket developed by Agarie. The difference between the two sockets is the following: the stability of the IRC-MCCT socket was improved through an adjustment of the anterolateral and sagittal directions of the IRC-UCLA socket [11]. In this study, an estimation of the pressure distribution during the interaction between the subject's residuum and both sockets was investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Many theoretical analyses use a finite element method (FEM) as a medium in quantitatively evaluating a biomimicking model [1,[5][6][7][8]11]. The FEM is a powerful tool to understand the load transfer in the interaction between human anatomy and a prosthetic device.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Pressure Distribution in Transfemoral Prosthetic Socket for Prefabrication Evaluation via the Finite Element Method

et al. 2019

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In this study, we estimated and validated the pressure distribution profile between the residuum and two types of prosthetic sockets for transfemoral amputees by utilizing a finite element analysis. Correct shaping of the socket for an appropriate load distribution is a critical process in the design of lower-limb prosthesis sockets. The pressure distribution profile provides an understanding of the relationship between the socket design and the level of subject comfortability. Estimating the pressure profile is important, as it helps improve the prosthesis through an evaluation of the socket design before it undergoes the fabrication process. This study focused on utilizing a magnetic resonance imaging (MRI)-based three-dimensional (3D) model inside a predetermined finite element simulation. The simulation was predetermined by mimicking the actual socket-fitting environment. The results showed that the potential MRI-based 3D model simulation could be used as an estimation tool for a pressure distribution profile due to the high correlation coefficient value (R 2 > 0.8) calculated when the pressure profiles were compared to the experiment data. The simulation also showed that the pressure distribution in the proximal area was higher (~30%) than in the distal area of the prosthetic socket for every subject. The results of this study will be of tremendous interest for fabricators through the use of a finite element model as an alternative method for the prefabrication and evaluation of prosthetic sockets. In future prosthetic socket fabrications, less intervention will be required in the development of a socket, and the participation of the subject in the socket-fitting session will not be necessary. The results suggest that this study will contribute to expanding the development of an overall prefabrication evaluation system to allow healthcare providers and engineers to simulate the fit and comfort of transfemoral prosthetics.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of Pressure Distribution in Transfemoral Prosthetic Socket for Prefabrication Evaluation via the Finite Element Method

et al. 2019

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“…The socket was inspired and created based on the standard IRC socket. The difference between the two sockets is that the stability of the IRC-MCCT socket was improved by the adjustment of the anterolateral and sagittal directions of the IRC-UCLA socket [13], as shown in Figure 1 and the method used to produce the IRC-MCCT socket uses MCCT.…”

Section: Methodsmentioning

confidence: 99%

Development of an Evaluation System for Magnetic Resonance Imaging Based Three-Dimensional Modeling of a Transfemoral Prosthetic Socket Using Finite Elements

et al. 2019

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Recent technologies have suggested the utilization of three-dimensional (3D) printing technology to enhance the fabrication accuracy of prosthetics. Accordingly, simulations are used to obtain precise parameters for subject-specified prosthetic socket. This study proposes an evaluation system to measure the accuracy of a subject-specific 3D transfemoral residuum model during the interaction with the socket in conjunction with the application of finite element methods. The proposed system can be used in future validations of socket fabrication. The evaluation is based on the measurement of the residuum’s soft tissue deformation inside two types of prosthetic sockets. In comparison with other studies, the 3D models were constructed with magnetic resonance images (MRI) with the aid of computer-aided design (CAD) software. The measurement of soft tissue deformation was conducted based on the measurement of the volumetric value of fat, muscle and skin in the pre- and post-donning phases. The result yielded a promising correlation coefficient value between the simulation and the experiment in the soft tissue deformation evaluation. The relation of the muscle–fat ratio in the residuum is extremely important in the determination of the ability of the prosthetic to deform. The environment during the socket fitting session was similar to that defined by the set boundary conditions in simulations. In view of the promising results of this study, the evaluation system proposed herein is considered reliable and is envisaged to be used in future research.

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Analyzing the Shear Stress on the Contacting Interface During Ambulation with Transfemoral Prosthesis Socket

et al. 2021

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Evaluation of the Effects of Geometrical Changes in Prosthetic Socket Towards Transfemoral Residuum via Finite Element Method

Cited by 4 publications

References 11 publications

Analysis of Pressure Distribution in Transfemoral Prosthetic Socket for Prefabrication Evaluation via the Finite Element Method

Analysis of Pressure Distribution in Transfemoral Prosthetic Socket for Prefabrication Evaluation via the Finite Element Method

Development of an Evaluation System for Magnetic Resonance Imaging Based Three-Dimensional Modeling of a Transfemoral Prosthetic Socket Using Finite Elements

Analyzing the Shear Stress on the Contacting Interface During Ambulation with Transfemoral Prosthesis Socket

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