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Stentzel, Christian, Volker Waurich, and Frank Will. "Miniature hydraulics for a mechatronic lower limb prosthesis." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71230.
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In Germany alone, 10,000 to 12,000 transfemoral amputations occur every year. Persistent rehabilitation efforts and advanced medical devices like prosthetic knee joints are crucial to reintegrating amputees into daily life successfully. Modern knee joints represent a highly integrated mechatronic system including special kinematics, a lightweight design, various sensors, microprocessors and complex algorithms to control a damping system in the context of the given situation. A knee joint is a passive system and normally has no actuator for an active movement. To enable a natural gait pattern, dampers decelerate the swinging speed of the prosthesis depending on the walking speed and situation. The invention of a novel knee joint called VarioKnie provides two kinematics - a monocentric and a polycentric one. Both kinematics have diametrical advantages and the user can choose the preferred setting through an electromechanical switching unit. With this knee joint in mind, a special hydraulic damper is developed to support both kinematics. Requirements and technical data are provided in the present paper. State of art are microprocessor-controlled knee joints with only one kinematic and either a hydraulic, a pneumatic, or a rheological damper.
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Hillery, Siobham Catherine. "The evaluation and development of a composite lower limb prosthesis." Thesis, University of Ulster, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336225.
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Tee, Kian Sek. "A mechatronic system for achieving optimum alignment of lower limb prosthesis." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.574609.
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Misalignment in the lower limb prosthesis can cause great discomfort in the stump- socket interface and disturbance to gait function. In the long run, it could deteriorate the musculoskeletal system. In practice, the assessment still depends heavily on the verbal feedback of an amputee and experiences of a prosthetist. Moreover it is inconsistent amongst the prosthetists. Prosthetic alignment involves the adjustment of the prosthetic components relative to the gait quality. Some methods were proposed, including symmetry index, variation in a step-to-step transition, stability within the zone of integrated balance, matching roll-over shape eROS) to an ideal ROS and etc. It is not clear if the optimum alignment could be achieved. These methods exhibit a few limitations, i.e. limited use of gait variables in a single comparison and non-uniform results when different gait variables are applied. There is a need to provide an objective assessment method that processes high dimensional gait variables and presents them in a simple form. In addition, it could be impractical and expensive clinically to spend excessive time on a patient. An ambulatory gait measurement system could achieve this objective to a certain extent. This research investigates a potential engineering solution that is able to provide an assistive and objective assessment of the lower limb prosthetic alignment that provides optimal gait quality. The effort includes a development of a low-cost ambulatory gait measurement system which could be reliably used during indoor and outdoor trials. Human walking trials using the designed ambulatory system are designed and performed to justify the proposed solution. A novel gait analysis method using Principle Component Analysis and Self-Organizing Feature Map is proposed to process high dimensional gait data into a simple plot and a decision guide. The proposed methodology could help to collect sufficient gait data during indoor and outdoor gaits and could provide an objective gait assessment during the application of lower limb prosthetic alignments.
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Ballit, Abbass. "Design and manufacturing process optimization for prosthesis of the lower limb." Thesis, Compiègne, 2020. http://www.theses.fr/2020COMP2589.
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Le socket prothétique (dit aussi emboiture prothétique), élément d'interface essentiel entre le moignon du patient et le dispositif prothétique, est le plus souvent le lieu où se définit le degré de réussite prothétique. C'est la partie la plus critique de la prothèse, personnalisée pour s'adapter au membre résiduel unique de l'amputé. Sans une forme et un ajustement approprié du socket, la prothèse devient inconfortable, voire inutilisable, et provoque des douleurs et des problèmes de peau. La production prothétique actuelle manque encore de normes numériques universelles pour concevoir un socket. La pratique actuelle est coûteuse et repose sur les raffinements manuels du technicien orthopédiste, et la qualité de l'ajustement est strictement corrélée à ses compétences ainsi qu'aux retours subjectifs du patient lors des phases d’essai de la prothèse fabriquée. La thèse vise à mener une analyse approfondie d'une conception optimale de l'emboîture prothétique en étudiant un processus alternatif de conception assistée par ordinateur. Ce processus est entièrement basé sur le modèle virtuel du membre résiduel du patient et repose sur le calcul de l’interaction emboîture-moignon. Un calcul rapide est favorable dans ce cas, c'est pourquoi nous proposons d'utiliser le système Mass-Spring (MSS) au lieu de la méthode FE largement utilisée pour modéliser les tissus mous du membre résiduel. Une nouvelle configuration du modèle MSS est proposée pour respecter la propriété de non compressibilité des tissus mous en ajoutant des « ressorts correctifs » non linéaires. Le modèle numérique doit être généré à partir du modèle scanné du moignon. À cette fin, nous proposons un schéma de fusion de quatre capteurs de profondeur à bas coût pour un scan rapide et économique avec des techniques de réduction des erreurs. Enfin, le membre résiduel virtuel est utilisé dans la phase de conception du socket. Une méthode de conception paramétrique est proposée et étudiée. Le problème de conception est transformé en problème de satisfaction des contraintes dérivées du calcul inverse de l'interaction socket-moignon. L'approche inverse a été choisie pour éliminer le besoin d'une formulation de contact coûteuse. Ce fait conduit à des calculs rapides, et par conséquent, permet de fournir des retours numériques en temps réel pendant le processus de conception. Le système a été implémenté pas programmation C++ avec une interface graphique où les retours numériques sont donnés sous forme d’une carte de radar. La validation a été faite en comparant les résultats de notre système avec la sortie des simulations FE. Le système a été implémenté avec une interface graphique conviviale et virtuellement testé et validé numériquement. Ce système réduit les limites des pratiques actuelles. Cependant, de nombreux travaux sont encore en cours pour affiner et développer le système et le valider par des expériences cliniques<br>The prosthetic socket, an essential interface element between the patient's stump and prosthetic device, is most often the place where the degree of prosthetic success is defined. It is the most critical part of the prosthesis, customized to fit with the unique residual limb of the amputee. Without a proper socket shape and fit, the prosthesis becomes uncomfortable, or even unusable, and causes pain and skin issues. The state-of-the-art prosthetic production is still missing universal numerical standards to design a socket. The current practice is expensive and relies on the manual refinements of the orthopedic technician, and the fit quality strictly correlates with his skills as well as the subjective feedback of the patient. The thesis aims to conduct a deep analysis of an optimal design of the prosthetic socket by studying and developing an alternative computer-aided design process. This process is fully based on the virtual model of the patient’s residual limb and relies on the calculation of the socket-stump interaction. A fast calculation is favorable in this case, that’s why we propose to use the Mass-Spring System (MSS) instead of the widely used FE method to model the soft tissues of the residual limb. A new configuration of the MSS model is proposed to respect the non-compressibility property of the soft tissues by adding non-linear “Corrective Springs”. The numeric model is to be generated from the scanned model of the stump. For this purpose, we propose a fusion scheme of four RGB-Depth sensors for a rapid and low-cost scan with error reduction techniques. Finally, the virtual residual limb is used in the socket designing phase. A parametric design method is proposed and investigated. The design problem is transformed into a constraint-satisfaction-problem whose constraints are derived from the inverse calculation of the stump-socket interaction. The inverse approach has been chosen to eliminate the need for expensive contact formulation. This fact leads to rapid calculations, and consequently, allows to provide real-time numerical feedback during the designing process. The validation was done by comparing the results of our system with the output of FE simulations. The system has been implemented with a user-friendly graphical interface and virtually tested and numerically validated. This system reduces the limitations of the current practices. However, a lot of works is still ahead to refine and develop the system and validate it with clinical experiments
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Gailey, Robert Stuart. "The amputee mobility predictor : a functional assessment instrument for the prediction of the lower limb amputee's readiness to ambulate." Thesis, University of Strathclyde, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367028.
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Warner, Holly E. "Optimal Design and Control of a Lower-Limb Prosthesis with Energy Regeneration." Cleveland State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=csu1439422794.
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Mpezeni, Stella. "Community experiences of persons with lower limb amputations in Malawi." University of the Western Cape, 2018. http://hdl.handle.net/11394/7062.
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>Magister Scientiae - MSc<br>Persons with lower limb amputations (LLA) experience different challenges in the community. These challenges include the physical, psychological and social function of an individual. Little is known in Malawi on what persons with lower limb amputations go through in the communities where they live. Therefore, the study aimed at exploring and determining community experiences of persons with LLA in Malawi. The study sought to address the following objectives: 1) To determine the functional and psychological status of persons with LLA in the community; 2) To explore and describe experiences on social participation of persons with LLA in the community; 3). To explore experiences on community re-integration following LLA.
A mixed method approach was applied where quantitative and qualitative data were collected simultaneously to provide a more holistic overview of the experiences of persons with LLA at one point in time. The study setting was Queen Elizabeth Central Hospital (QECH) and Kamuzu Central Hospitals (KCH) (500 miles), located in Malawi. A sample of 180 participants was recruited to participate in the study. Three self-administered questionnaires (socio-demographic questionnaire, OPUS module of lower extremity functional status, and a Beck’s depression inventory scale) and a semi-structured interview guide were used for data collection. Thematic data analysis was used to analyze qualitative data, while quantitative data was analyzed using descriptive and inferential statistics. Ethical clearance was obtained from the University of the Western Cape Biomedical Research Ethics Committee (BMREC) and College of Medicine Research Ethics Committee (COMREC). Permission to conduct the study was obtained from KCH (500 miles) and QECH. Privacy andconfidentiality was strictly observed such that data obtained was anonymous. It was kept in a secure place, and electronic data was secured using a password.
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Yu, Tian. "Actuation and control of lower limb prostheses." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760933.
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Millions of people are suffering from lower limb loss all around the world. Passive ankle prostheses in the market cannot fully restore ankle function and will cause asymmetrical walking gaits. Several powered ankle prostheses, which provide net power in the stance phase to assist walking, have been developed by the researchers, but their walking range is significantly limited by the power requirement. In this thesis, an electrohydrostatic actuator (EHA) powered ankle prosthesis is proposed. This is intended to actively assist walking at certain points in the gait cycle, namely the plantarflexion (PF) before toe-off and dorsiflexion (DF) in the early swing phase for toe-lifting. In the rest of the gait, the ankle prosthesis actuation system can operate passively with controllable damping. This approach can increase the working time range compared to a continually powered ankle and ensure safe passive prosthetic function after the battery discharged. A prototype of the EHA powered ankle prosthesis has been developed. A 100 W brushless DC motor is used driving a 0.45 cc/rev bi-directional gear pump. The damping ratios of the ankle PF and DF are controlled by bypass restriction valves. The EHA system and the foot springs at the ankle joint weigh 2.2 kg. The controller and a 2 Ah battery are held in a backpack. Walking characteristics with a passive ankle were studied in an amputee trial to gather ankle sensor signals for the controller design. A timing control method is proposed which uses the foot spring strain gauge signals to detect heel strike. A middle stance time delay is added between the end of the heel strike and the start of the powered PF phase. This delay time length can be adjusted to fit different walking speeds. Heel strike detection using hydraulic pressure signals is also studied. The EHA powered ankle prosthesis and its controller has been tested by a 70 kg transtibial amputee. According to the amputee trial results, the EHA can provide sufficient power to assist walking in the terminal stance and the energy consumption in the passive phases are proximately zero. The on-board battery is able to power over 5500 level walking steps. In the amputee trial, the ankle prosthesis controller correctly recognises the heel strike and triggers the powered PF phase. According to feedback from the amputee, the EHA powered ankle prosthesis provided beneficial level walking assistance and a very natural walking gait. The characteristics of the powered ankle prosthesis are analysed by comparing with the healthy ankle and by testing at different walking speeds. A simulation model was developed to help analyse the performance characteristics of the EHA. This includes a brushless DC motor model and a symmetric hydraulic actuation model. The laboratory-based experiment results and amputee trial results are used to analyse and validate the simulation model. The model can be used for future development and refinement of EHA powered ankle prostheses.
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Prodanov, Dimiter Petkov. "Morphometric analysis of the rat lower limb nerves anatomical data for neural prosthesis design /." Enschede : University of Twente [Host], 2006. http://doc.utwente.nl/51110.
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Yang, Lang. "The influence of limb alignment on the gait of above-knee amputees." Thesis, University of Strathclyde, 1988. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21359.
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Alignment of the above-knee prostheses is one of the important factors affecting the success of patient/prosthesis matching. It has been found that the prosthetist and the patient can accept a number of alignments which produce different intersegmental loads and it has been suggested that it is possible to obtain an 'optimal' alignment satisfying certain criteria. In order to enhance the efficiency of the alignment procedure, it is necessary to understand how alignment affects the amputee's gait and the patient compensations for changes in the alignment. Biomechanical gait tests on above-knee amputees were conducted in which the alignment of the prosthesis was changed systematically. The Strathclyde television-computer system was used to record the kinematic data of the amputee, and the ground reactions were measured by two Kistler forceplates. An 8-segment biomechanical model of the above-knee amputee was developed and implemented by a suit of FORTRAN computer programs to analyze and present 3-D kinematic and kinetic data obtained. The effects of alignment changes on the above-knee amputees' gait were studied in terms of the temporal-distance parameters, angular displacements of the lower limbs and the trunk, ground reactions and intersegmental moments. It was found that the angular displacement at the hip joint on the prosthetic side showed compensatory actions of the amputee for the alignment changes. The ground reaction force was sensitive to alignment changes, and in particular, the changes in the characteristics of the fore-aft ground force could be related to the alignment changes. The antero-posterior intersegmental moments about the prosthetic ankle and knee joints were evidently influenced by alignment.
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Fan, Richard E., Christopher R. Wottawa, Marilynn P. Wyatt, Todd C. Sander, Martin O. Culjat, and Martin O. Culjat. "A Wireless Telemetry System to Monitor Gait in Patients with Lower-Limb Amputation." International Foundation for Telemetering, 2009. http://hdl.handle.net/10150/606038.
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ITC/USA 2009 Conference Proceedings / The Forty-Fifth Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2009 / Riviera Hotel & Convention Center, Las Vegas, Nevada<br>Even after rehabilitation, patients with lower-limb amputation may continue to exhibit suboptimal gait. A wireless telemetry system, featuring force sensors, accelerometers, control electronics and a Bluetooth transmission module was developed to measure plantar pressure information and remotely monitor patient mobility. Plantar pressure characterization studies were performed to determine the optimal sensor placement. Finally, the wireless telemetry system was integrated with a previously developed haptic feedback system in order to allow remote monitoring of patient mobility during haptic system validation trials.
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Zahedi, Saeed. "The study of alignment of lower limb prostheses." Thesis, University of Strathclyde, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436095.
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Whitmore, Sigrid Ilona. "Realization of a Measuring Device for Recordning the Relative Movement between Residual Limb and Prosthetic Socket." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/84478.
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Relative motion between residual limb and prosthetic socket is an indication of poor fit. Both the fabrication and fitting processes are highly subjective and a favorable result depends upon the technician's expertise. Although numerous methods exist to measure the relative motion, all have limitations and are not well suited for clinical use. A measurement system using optical sensors has been proposed by students at the Technische Universität Darmstadt and evaluations of a functional model have yielded promising results. In this thesis, the existing functional model is improved and expanded to use an array of sensors. A new microcontroller is selected and incorporated into the system. The software and data communication are optimized for fast, reliable performance and the system is then evaluated on a test rig to determine favorable calibration settings and quantify performance. System frequencies up to 1299 Hz are achieved. It is found that the surface microstructure has a dominant effect over short measurement distances; calibrations performed over longer distances are to be preferred. For the chosen calibration factors, the greatest relative errors over a 40 mm distance are found to be 0.90% ± 0.51% in the X direction and -4.76% ± 1.61% in the Y-direction. A systematic drift is also identified. The final system accommodates up to eight sensors and is controlled from a feature-rich MATLAB GUI.<br>Master of Science
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Khademi, Gholamreza. "Design and Optimization of Locomotion Mode Recognition for Lower-Limb Amputees with Prostheses." Cleveland State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=csu1568747409603973.
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Mulvana, Helen. "The potential for parametric acoustic radiation force generation for elasticity estimation to aid in lower limb prosthesis fitting." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501649.
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Tissue elasticity assessment is is used in clinical applications from cancer diagnosis to prosthesis fitting. Elastography, using ultrasound to image tissue elasticity to replace digital palpation, includes methods which measure small volume tissue response to high-frequency acoustic excitation and bulk responses following quasi-static loading. Such techniques are well explored and used clinically; however, the goal of quantitative elasticity estimation remains unfulfilled. Additionally, tissue's elastic nonlinearity prevents either approach from providing elasticity information relevant to low-frequency loading as applied by a prosthesis on the lower-limb residuum during gait. This thesis presents research towards the development of a technique utilising the parametric array to exert an acoustic radiation force over small tissue areas under loading frequencies similar to those of gait. The resulting acoustic field magnitude is shown to depend on the elastic properties of the tissue it is developed within. An approach is presented which provides the foundations for a possible medical device to provide high resolution, low frequency, quantitative tissue elasticity information, to aid the prosthetist during fitting or offer the opportunity for automation.
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Hákonardóttir, Stefanía. "Prosthetic Control using Implanted Electrode Signals." Thesis, KTH, Skolan för teknik och hälsa (STH), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147699.
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This report presents the design and manufacturing process of a bionic signal messagebroker (BSMB), intended to allow communication between implanted electrodes andprosthetic legs designed by Ossur. The BSMB processes and analyses the data intorelevant information to control the bionic device. The intention is to carry out eventdetection in the BSMB, where events in the muscle signal are matched to the events ofthe gait cycle (toe-o, stance, swing).The whole system is designed to detect muscle contraction via sensors implantedin residual muscles and transmit the signals wireless to a control unit that activatesassociated functions of a prosthetic leg. Two users, one transtibial and one transfemoral,underwent surgery in order to get electrodes implantable into their residual leg muscles.They are among the rst users in the world to get this kind of implanted sensors.A prototype of the BSMB was manufactured. The process took more time thanexpected, mainly due to the fact that it was decided to use a ball grid array (BGA)microprocessor in order to save space. That meant more complicated routing and higherstandards for the manufacturing of the board. The results of the event detection indicatethat the data from the implanted electrodes can be used in order to get sucient controlover prosthetic legs. These are positive ndings for users of prosthetic legs and shouldincrease their security and quality of life.It is important to keep in mind when the results of this report are evaluated that allthe testing carried out were only done on one user each.
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Blessing, Victoria Myriam Patricia. "User innovation of medical technologies in a developing country setting : the case of lower limb prostheses in Malawi." Thesis, University of Sussex, 2014. http://sro.sussex.ac.uk/id/eprint/54506/.
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As is well known, users can make significant contributions to innovations, including innovating themselves. However, much work on user innovation has focussed on developed countries. The question remains whether and how users innovate in a developing country setting. Bodies of literature that explicitly consider innovations in such settings emphasise the influence of limitations. This thesis therefore investigates how limitations shape the creation and sharing of innovations by users. This issue is analysed for medical technologies, because these can have different user groups, including patients, who have been little focussed on, even in developed countries. In this setting, a focus on innovation as defined relatively inclusively is most suitable, and therefore the term 'changes' is often used rather than 'innovations' to express this inclusiveness. By comparing the changes made to the same kind of technology by different groups of users in different settings with different limitations, the influence of these limitations can be analysed. Therefore, data were collected on changes made by patients as well as orthopaedic technicians to lower limb prostheses in two orthopaedic centres in Malawi. First, observations were conducted of the production process for prostheses, followed by semi-structured interviews with orthopaedic technicians and patients, and with additional experts to understand the broader context. It was found that patients and orthopaedic technicians did make many changes. Three kinds of limitations were identified, that influence these changes by users. Like users in developed countries, patients and orthopaedic technicians make these changes to fulfil their needs because available products and services are not satisfactory. Limitations both restrict what products and services are available to users, and also influence the characteristics of the creation and sharing of changes by users. Many users reported on efforts to share their changes with others despite the limitations, often due to a sense of professional collegiality and solidarity. In summary, limitations help to explain how changes by users occur in developing countries, but also how any accumulation of such changes users make is restricted. Improving this situation could help less developed countries in making better use of any user innovations that do occur, and thus contribute to their development more generally.
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Bulva, Ondřej. "Aktivní protéza dolní končetiny." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316811.
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This thesis deals with the current state of development of active lower limb prostheses and focuses mainly on own design of active prostheses. The introduction deals with the anatomy of lower limb and briefly describes the walk cycle. In other chapters are summarized amputation techniques in the lower limb, followed by a description of the allocation of prostheses according to the level of amputation, which were described in earlier chapters. The thesis also deals with the division of prostheses according to the patient's activity level and briefly describes the structural differences in these individual cases. Chapter describing the actual development in the field of active prostheses initiates part dealing with the detailed description of the part of the prosthesis. The following chapters deal with the design and implementation of a prototype of active transfemoral prosthesis. The penultimate chapter deals with the software description of all parts of the prosthesis. This chapter is followed by an evaluation of the achieved results.
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Grimmer, Martin [Verfasser], Andre [Akademischer Betreuer] Seyfarth, and Thomas [Akademischer Betreuer] Sugar. "Powered Lower Limb Prostheses / Martin Grimmer. Betreuer: André Seyfarth ; Thomas Sugar." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2015. http://d-nb.info/1110980876/34.
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Murillo, Jaime. "Design of a Pneumatic Artificial Muscle for Powered Lower Limb Prostheses." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/24104.
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Ideal prostheses are defined as artificial limbs that would permit physically impaired individuals freedom of movement and independence rather than a life of disability and dependence. Current lower limb prostheses range from a single mechanical revolute joint to advanced microprocessor controlled mechanisms. Despite the advancement in technology and medicine, current lower limb prostheses are still lacking an actuation element, which prohibits patients from regaining their original mobility and improving their quality of life.
This thesis aims to design and test a Pneumatic Artificial Muscle that would actuate lower limb prostheses. This would offer patients the ability to ascend and descend stairs as well as standing up from a sitting position. A comprehensive study of knee biomechanics is first accomplished to characterize the actuation requirement, and subsequently a Pneumatic Artificial Muscle design is proposed. A novel design of muscle end fixtures is presented which would allow the muscle to operate at a gage pressure surpassing 2.76 MPa (i.e. 400 psi) and yield a muscle force that is at least 3 times greater than that produced by any existing equivalent Pneumatic Artificial Muscle. Finally, the proposed Pneumatic Artificial Muscle is tested and validated to verify that it meets the size, weight, kinetic and kinematic requirements of human knee articulation.
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Perrotti, Tracy Ann. "An exploration of the lumbar loads and affective responses to lumbar pain on lower limb amputees who use a prosthesis." [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001327.
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Laszczak, Piotr. "Interfacial pressure and shear sensor systems for lower limb prosthetic applications." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/393746/.
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Lower limb prosthetic socket provides the interface for the transfer of loads between the ground and the stump. During daily physical activities, the stump has to endure mechanical stresses in normal (pressure) and tangential (shear) directions to the stump/socket interface, both of which may cause discomfort, pain, and a host of stump health problems. Despite the importance of the issues, there is currently no clinically-friendly sensor technology available to monitor both pressure and shear at the stump/socket interface. In this thesis, two sensor systems were developed - both capable of simultaneously measuring dynamic pressure and shear at the lower limb stump/socket interface. In particular, two thin, capacitive sensors based on flexible elastomers (3D-printed and silicone) were designed and fabricated. To acquire sensor signals, appropriate data acquisition circuitries and PC software were produced. A viscoelastic model for real-time processing of the sensor signals was developed, to improve their dynamic response. The sensor systems were characterised in research lab settings, and their performance was verified against comprehensive design requirements. The characterised sensor systems were validated at the stump/socket interface in a series of amputee walking tests, and a range of clinical factors were investigated. Pressure and shear were measured at up to three discrete locations of a trans-femoral stump. Their temporal profiles when walking on level and inclined surfaces were obtained. The results suggest that ankle flexion resistance may have an effect on both the magnitudes and the temporal profiles of pressure and shear at the stump/socket interface. The thesis delivers a tool for measuring pressure and shear at the stump/socket interface in a clinically-friendly manner. What is more, it contributes to the prosthetic field by bringing an insight into the pressure and shear at the trans-femoral stump/socket interface, thus enhancing the understanding of its biomechanics. In the future such a sensor technology could potentially aid daily monitoring of socket fit, assist prosthetists with socket fitting, support research on the stump/socket interface biomechanics, etc.
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Musilová, Kateřina. "Deformačně-napěťová analýza protézy dolní končetiny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229249.
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This master thesis deals with lower-limb prosthesis. The aim of the first part of this work is stress-strain analysis of trans-tibial prosthesis, which is understand without prosthetic socket and the foam prosthetic feet. Analysis is made using finite element method in ANSYS Workbench 12.0 software. For the purpose of setting up the computational model it is necessary to make few partial models. Model of geometry of the prosthesis is made in SolidWorks 2009. Based on the outputs of stress-strain analysis and the results evaluation, the critical component is chosen and this one is evaluated according to limite state for fatigue. The algorithm of evaluation of named component in the state of high cycle fatigue is discussed in the second part of this thesis.
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Malátková, Hana. "Design protézy dolní končetiny pro děti." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254228.
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The topic of this master’s thesis is design of human leg prosthesis for children. The thesis concerns own design of transbinal prosthesis for children that meet the basic technical, ergonomical and social requi¬rements and also brings a new look and shape as solution to the main topic. The infant incubator is designed in regard to modern materials and technologies.
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Beckerle, Philipp [Verfasser]. "Human-machine-centered design and actuation of lower limb prosthetic systems / Philipp Beckerle." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2014. http://d-nb.info/1110980264/34.
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Unwin, Paul Simon. "Investigation of improved fixation in massive endo-prosthetic replacements of the lower limb." Thesis, University College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299921.
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Geil, Mark Daniel. "Effectiveness Evaluation and Functional Theoretical Modeling of Dynamic Elastic Response Lower Limb Prosthetics." The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1391593663.
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Chagas, Maurício Pereira. "Plataforma instrumentada para alinhamento de prótese de membro inferior /." Ilha Solteira, 2018. http://hdl.handle.net/11449/182009.
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Orientador: Marcelo Augusto Assunção Sanches<br>Resumo: Neste trabalho é apresentado o desenvolvimento de um sistema de alinhamento referenciado de prótese de membro inferior, denominado PASyLL (Prosthesis Alignment System of Lower Limbs). A qualidade do alinhamento e ajuste de próteses de membros inferiores é fundamental no processo de reabilitação, principalmente porque contribui para que não ocorra o abandono do uso da prótese. Atualmente, muitos alinhamentos de próteses ainda são realizados de forma subjetiva, sem auxílio de equipamentos, ou seja, apenas com base na experiência e conhecimento do profissional de saúde. Diante disso, desenvolveu-se o PASyLL, um sistema para auxiliar o profissional da saúde no alinhamento de prótese. Este equipamento mede parâmetros importantes para um alinhamento adequado, fornece ao terapeuta dados objetivos, auxiliando-o na tomada de decisão. Com este sistema é possível medir e realizar ajustes no comprimento, medir a distribuição do peso no membro protetizado e não protetizado, verificar a posição do centro de pressão do paciente (COP), desta forma auxiliar no ajuste médio lateral e anteroposterior. O sistema possui fachos laser na horizontal e vertical, permitindo assim um alinhamento referenciado. O erro percentual na medição do peso foi inferior a 1% e na medida do COP, inferior a 5%.<br>Abstract: In this work the development of a referenced alignment system of lower limb prosthesis, called PASyLL (Prosthesis Alignment System of Lower Limbs), is presented. The quality of the alignment and adjustment of lower limb prostheies is fundamental in the rehabilitation process, mainly because it contributes to the abandonment of prosthesis use. Currently, many prosthesis alignments are still performed subjectively, without the aid of equipment, that is, only based on the experience and knowledge of the health professional. Therefore, the PASyLL, a system to assist the health professional in the prosthesis alignment, was developed. This equipment measures important parameters for proper alignment, provides the therapist with objective data, assisting him in decision making. With this system it is possible to measure and adjust the length, measure the weight distribution in the amputated and not amputated limb, verify the position of the patient pressure center (COP) in this way assist in the lateral lateral and anteroposterior adjustment. The system has horizontal and vertical laser beams, allowing a referenced alignment. The percentage error in weight measurement was less than 1% and in the COP, less than 5%.<br>Mestre
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Bulea, Thomas Campbell. "Design of a sensor based data collection system for lower limb prosthetic gait analysis." Connect to this title online, 2005. http://hdl.handle.net/1811/321.
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Thesis (Honors)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formattted into pages: contains iv, 31 p.; also includes graphics. Includes bibliographical references (p. 30-31). Available online via Ohio State University's Knowledge Bank.
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Lohrer, John. "Smart Prosthetic for Lower Limb Amputees Utilizing a Novel Shear and Normal Force Sensor." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504803734497035.
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Christie, Breanne P. "Multisensory Integration of Lower-Limb Somatosensory Neuroprostheses: from Psychophysics to Functionality." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1575564218875779.
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Eby, Wesley R. "Feasibility Analysis of a Powered Lower-Limb Orthotic for the Mobility Impaired User." Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/952.
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Powered orthotic devices can be used to restore mobility to the impaired user, and may thereby assist them in daily living tasks. An investigation is performed herein to examine the feasibility of a powered lower-limb orthotic in assisting the sit-to-stand task by 50% of the required torque. Feasibility is considered via simulation.
A three-link sit-to-stand model, which is driven by kinematic data, is developed. Models of a Pneumatic Muscle Actuator and a DC motor are used to determine which of the two technologies can make a more appropriate contribution to the sit-to-stand task. Simulation revealed that both the Pneumatic Muscle Actuator and the DC motor are reasonable actuator choices, and neither limited the ability to achieve 50% torque assistance. The ability to assist the task was, however, limited by the ability to derive a control signal for the actuator from the user-orthotic interface.
It was concluded that the user-orthotic interface requires further investigation. It was also found that while both actuator technologies are suitable for contributing 50% of the required torque, the Pneumatic Muscle Actuator is preferable due to its ability to scale to greater torques.
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Callaghan, Brian G. "Cognitive representations and attitudes as predictors of prosthetic use and recovery following lower limb amputation." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501916.
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Dyer, Bryce T. J. "An insight into the acceptable use and assessment of lower-limb running prostheses in disability sport." Thesis, Bournemouth University, 2013. http://eprints.bournemouth.ac.uk/21069/.
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Sports technology can be any product or system used to facilitate, train or influence an athlete’s performance. The role of prostheses used for disability sport was initially to help facilitate exercise and then ultimately, competition. In able-bodied sport, controversy has occasionally been caused through the adoption or introduction of sports technology. However, scant attention has been paid to sport with a disability with respect to such concerns. This research project provides a novel contribution to knowledge by investigating the use of lower-limb running prostheses in competition by trans-tibial amputees. A novel study using a mixed method approach has investigated the nature, use and assessment of lower-limb running prostheses. It has proposed that the unchecked introduction of such technology has affected the sport negatively. From this, the study conducted a stakeholder assessment of the sport and provided a proposed series of guidelines for lower-limb prostheses technology inclusion. Finally, the recommendation was made that a proactive approach to such technologies’ inclusion in the future should be implemented. These guidelines were further developed by assessing symmetrical and nonsymmetrical lower-limb function and proposed that single and double lowerlimb amputees should be separated in competition in the future. To this end, it was proposed that lower-limb symmetry, stiffness and energy return were important means of monitoring prosthesis performance. Ultimately, a dynamic technique which assesses these qualities was proposed as an assessment strategy for further development in the future.
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Perius, Tiago Faria. "Geração de diretrizes de projeto com o uso do Design For X para o desenvolvimento de prótese de membro inferior de baixo custo." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/116624.
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A presente pesquisa teve por objetivo a geração de diretrizes de projeto para o desenvolvimento de Próteses de Membros Inferiores, que atendesse as necessidades funcionais dos usuários que resulte na simplificação do objeto. Para isso, investigou-se o usuário, percebendo suas necessidades físicas e psicológicas, com conhecimento de leis federais existentes para o auxílio a esse público. Também, foram examinados a anatomia humana e os procedimentos cirúrgicos para a amputação de membros inferiores, a fim de compreender sua influência na concepção de uma prótese. Outro enfoque da pesquisa foi o estudo da biomecânica para reconhecer os movimentos realizados por uma pessoa sadia durante a deambulação, observando-se as etapas da sua marcha em comparação à marcha de indivíduos amputados que utilizavam próteses. Ainda foram analisados distintos tipos de próteses de membros inferiores e a tecnologia empregada em cada uma de suas partes: sistema de encaixe ao coto, joelho protético e sistema pé-tornozelo. Esses estudos originaram dados empregados na aplicação da metodologia do Design for X, para avaliar as próteses atuais em seus aspectos e construção, com o objetivo de gerar diretrizes de projeto para a elaboração de próteses simplificadas. Constatou-se que a aplicação do método originou diretrizes de projeto que poderão ser empregados durante o desenvolvimento de projetos de próteses de membros inferiores, visando à redução de custo do produto.<br>This research aims to generate design requirements for the development of Lower Limb Prosthetics that meet the functional needs of users, leading to a simplification of the object. For this, we investigated the users regarding their physical and psychological needs, with full knowledge of the existence of federal laws in order to help people. Human anatomy and surgical procedures for lower limb amputation were also examined in order to understand their influence on the design of a prosthesis. Another focus of the research was the study of biomechanics to recognize the movements performed by a healthy person when walking, observing the steps of their march comparing them with the march of amputees who used prosthesis. For the simplified development of prosthesis different types of prosthetic legs have been examined, technology has been employed in each of its parts such as fitting the stump prosthetic knee and the ankle-foot system. These studies yielded useful data used in the application of the methodology of Design for X to assess current prosthetic aspects and construction, to achieve design requirements for the development of simplified prosthesis. It was found that the application of the method originated design requirements that may be employed during the development of lower limb prosthesis projects, aiming to reduce product cost.
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Buckley, John G. "Variable speed walking and running in physically active lower-limb amputees : gait biomechanics and prosthetic design influences." Thesis, Manchester Metropolitan University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343457.
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Sagawa, Yoshimasa. "Vers une approche multidimensionnelle de l'évaluation motrice du sujet amputé." Thesis, Valenciennes, 2012. http://www.theses.fr/2012VALE0018/document.
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Les personnes amputées de membre inférieur (PAMI) sont très diversifiées. Ils’agit d’une population hétérogène, tant par ses origines que par ses niveaux d’amputation, ses capacités et ses projets de vie. A ces profils variés s’ajoutent une multitude de composants prothétiques ainsi que les différentes combinaisons possibles entre ces composants. Il est également important de prendre en compte les différents environnements auxquels la PAMI est confrontée quotidiennement. La Classification Internationale du Fonctionnement (CIF 2001) a été créée par l’Organisation Mondiale de la Santé et repose sur un modèle multidimensionnel. Elle est constituée de deux grandes parties : le fonctionnement d’une part et les facteurs contextuels d’autre part. Ce modèle est capable de décrire de manière globale les modifications de fonctionnement (handicap) à partir d’un problème de santé quelconque. Ainsi, une grande quantité d’informations peut être obtenues à partir du modèle de la CIF. Néanmoins, il demeure nécessaire de développer de nouveaux outils pour mieux exploiter ce modèle afin de le rendre plus intelligible et utilisable en pratique clinique courante. Pour cela, nous nous proposons d’utiliser l’Extraction de Connaissances à partir des Données (ECD). L’ECD est un processus non trivial d'identification des structures inconnues, valide et potentiellement exploitable dans les bases de données, qui permet de transformer un maximum d’informations en connaissances facilement exploitables. A partir du modèle de la CIF et conjointement avec des méthodes d’ECD, l’objectif de cette thèse est de caractériser un groupe de PAMI expertes en termes de capacités locomotrices. Ce groupe et sa liste d’indicateurs pertinents reposant sur le modèle de la CIF ont été déterminés. Ils servent de référence pour la comparaison d’autres PAMI et peuvent guider la prise en charge de cette population particulière<br>The subjects with a lower-limb amputation (LLA) compose a heterogeneouspopulation, by their amputation origins, by their amputation levels, by their abilities and by their life projects. To these various LLA’s profiles we could add a multitude of prosthetic components and the combination of these components. It is also important to take into account the different environments, which the LAA are confronted daily. The International Classification of Functioning, Disability and Health (ICF 2001) was created by the Word Heath Organization and is based on a multidimensional model. The ICF is constituted by two domains: the functioning on one hand and the contextual factors on the other hand. This comprehensive-global model is able to describe the functioning (disability) from any health problem. However it remains necessary to develop new tools to better use the ICF model making it more intelligible and useful in clinical practice. For this, we proposed to use the Knowledge Discovery in Database (KDD). KDD is a non-trivial process of identification of unknown, valid and potentially-exploitable structures in database. KDD permits to transform a maximum of information in easy-exploitable knowledge. From the ICF model conjoint with KDD methods, the aim of this thesis was to characterize an expert group of LLA in terms of locomotion capacity. This group and its list of relevant indicators, based on the ICF model, were determined. They can be used as a reference to compare with others LLA improving making decision of this particular population
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Tsai, Hoi Yan Amy. "Aided prosthetic gait of people with lower-limb amputations, comparison of four-footed and two-wheeled walkers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63561.pdf.
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De, Asha Alan R. "Biomechanical adaptations of lower-limb amputee-gait: Effects of the echelon hydraulically damped foot. Segmental kinetic and kinematic responses to hydraulically damped prosthetic ankle-foot components in unilateral, trans-tibial amputees." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/7271.
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The aim of this thesis was to determine the biomechanical adaptations made by active unilateral trans-tibial amputees when they used a prosthesis incorporating a hydraulically-damped, articulating ankle-foot device compared to non-hydraulically attached devices. Kinematic and kinetic data were recorded while participants ambulated over a flat and level surface at their customary walking speeds and at speeds they perceived to be faster and slower using the hydraulic device and their habitual foot.
Use of the hydraulic device resulted in increases in self-selected walking speeds with a simultaneous reduction in intact-limb work per meter travelled. Use of the device also attenuated inappropriate fluctuations in the centre-of-pressure trajectory beneath the prosthetic foot and facilitated increased residual-knee loading-response flexion and prosthetic-limb load bearing during stance. These changes occurred despite the hydraulic device absorbing more, and returning less, energy than the participants’ habitual ankle-foot devices. The changes were present across all walking speeds but were greatest at customary walking speeds.
The findings suggest that a hydraulic ankle-foot device has mechanical benefits, during overground gait, for active unilateral trans-tibial amputees compared to other attachment methods. The findings also highlight that prosthetic ankle-foot device ‘performance’ can be evaluated using surrogate measures and without modelling an ‘ankle joint’ on the prosthetic limb.
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Johansson, Malin, and Lisa Felixon. "Activity and Participation in individuals who have received lower limb prostheses from Exceed : A qualitative study conducted in Cambodia." Thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ, Avd. för rehabilitering, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-44609.
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Background: Cambodia has one of the highest percentages of persons living with disability in the world. Disabled people often encounter stigma in the community, and they do not have the same access to a range of services as the rest of the population. A prosthetic device can enable a disabled person and help them to become more active and participating. Aim: The aim of this study was to investigate the perception of individuals who have received lower limb prosthesis from Exceed regarding factors that affect their level of activity and participation. Method: The study is based on recorded qualitative interviews with semi-structured questions. 10 participants between the age of 22-68 who had a prosthesis were included in the study. An inductive content analysis was performed on the data. Results:The study yielded two main categories which affected the participants activity and participation; Prosthetic limb and a Psychosocial environment. Conclusion: This study gives a deeper understanding of facilitators and barriers affecting activity and participation for individuals with a prosthesis. The results of this study highlight the complexity of the issue and the importance of both the prosthetic device and psychosocial environment. The study gives an insight into factor contributing to different levels of activity and participation and it can help to improve the outcome for prosthetic users.<br>Bakgrund: Kambodja är ett av de länder i världen med störst andel personer med funktionshinder. De stöter ofta påstigma och har inte samma tillgång till en del av de tjänster som resten av befolkningen. En protes kan göra det möjligt för en person med funktionsnedsättning att övervinna svårigheter och att bli mer aktiv och deltagande. Syfte: Syftet med denna studie var att undersöka hur protesanvändare som mottagit sin protes från Exceed uppfattar sin aktivitet och delaktighet och vilka faktorer de anser påverkar detta. Metod: Inspelade kvalitativa intervjuer med semi-strukturerade frågor användes i studien. 10 deltagare i åldrarna 22–68 deltog i studien. En induktiv content-analys användes för att bearbeta den insamlade datan. Resultat:Studien resulterade i två huvudkategorier; Protes och Psykosocial miljö, som enligt deltagarna påverkade deras aktivitet och delaktighet Slutsats: Denna studie ger en djupare förståelse för vad som underlättar och hindrar protesanvändare att vara aktiva och delaktiga i vardagen. Studien lyfter också fram ämnets komplexitet där protesen spelar en viktig roll men där även den psykosociala miljön har stor betydelse. Resultatet av denna studie kan hjälpa till att förstå de bakomliggande orsakerna till olika nivåer av aktivitet och deltagande och hjälpa till att förbättra situationen för protesanvändare.
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De, Asha Alan Richard. "Biomechanical adaptations of lower-limb amputee-gait : effects of the echelon hydraulically damped foot : segmental kinetic and kinematic responses to hydraulically damped prosthetic ankle-foot components in unilateral, trans-tibial amputees." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/7271.
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The aim of this thesis was to determine the biomechanical adaptations made by active unilateral trans-tibial amputees when they used a prosthesis incorporating a hydraulically-damped, articulating ankle-foot device compared to non-hydraulically attached devices. Kinematic and kinetic data were recorded while participants ambulated over a flat and level surface at their customary walking speeds and at speeds they perceived to be faster and slower using the hydraulic device and their habitual foot. Use of the hydraulic device resulted in increases in self-selected walking speeds with a simultaneous reduction in intact-limb work per meter travelled. Use of the device also attenuated inappropriate fluctuations in the centre-of-pressure trajectory beneath the prosthetic foot and facilitated increased residual-knee loading-response flexion and prosthetic-limb load bearing during stance. These changes occurred despite the hydraulic device absorbing more, and returning less, energy than the participants’ habitual ankle-foot devices. The changes were present across all walking speeds but were greatest at customary walking speeds. The findings suggest that a hydraulic ankle-foot device has mechanical benefits, during overground gait, for active unilateral trans-tibial amputees compared to other attachment methods. The findings also highlight that prosthetic ankle-foot device ‘performance’ can be evaluated using surrogate measures and without modelling an ‘ankle joint’ on the prosthetic limb.
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Svensk, Elin, and Josefin Lång. "Activity and participation at home and in the community for individuals using lower limb prostheses : A qualitative study conducted in Kiribati." Thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ, Avd. för rehabilitering, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-40468.
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Background: Kiribati has one of the highest rates of diabetes in the world. A major consequence of diabetes is amputation which creates a demand for prosthetic and orthotic services. It is well established that people with amputations who do not have access to a prosthesis experience difficulties with their mobility and participation in society. Aim: To describe activity and participation at home and in the community for individuals who have received a lower limb prosthesis in Kiribati. Method: This study is based on qualitative interviews using a semi-structured approach with seven participants from Kiribati who have been fitted with lower-limb prostheses. Recorded interviews were performed. Results: The study yielded two main categories which led to the participants becoming more independent: the effect of mobility and the importance of relationships. Conclusion: Activity and participation increased in individuals who use a prosthesis as a result of diabetes type 2, compared to those who do not use a prosthesis. Prosthetic use contributes to increased mobility, which affects activity and participation, in turn leading to greater satisfaction in life. Caution should be taken with regard to these conclusions because the gender distribution did not meet the requirements for variation, making it difficult to generalize the results to the population.<br>Bakgrund: Kiribati har en av den högsta prevalensen av diabetes i världen. En stor konsekvens av diabetes är amputation vilket leder till behov av protes- och ortos service. Svårigheter med mobilitet och delaktighet i samhället har visats för personer som är amputerade men inte har tillgång till protes. Syfte: Beskriva aktivitet och delaktighet i hemmet och i samhället för individer som har fått en protes till nedre extremiteten. Metod: Denna studie är baserad på kvalitativa intervjuer och använder ett semi-strukturerad metod. Sju deltagare från Kiribati med nedre extremitets protes deltog. Inspelade intervjuer genomfördes. Resultat: Studien resulterade i två huvudkategorier, effekten av mobilitet och vikten av relationer. Mobilitet möjliggjorde aktivitet och delaktighet vilket ledde till att deltagarna blev mer självständiga. Nära relationer och hjälp från familjen visade sig viktig efter tillgång till protes. Slutsats: Aktivitet och delaktighet ökade hos individer som till följd av diabetes typ 2 använder sig av protes, i jämförelse med dem som inte använder protes. Protesanvändning bidrar till en ökad mobilitet som påverkar aktivitet och delaktighet vilket leder till högre tillfredställelse i livet. Dessa slutsatser skall dock tas med aktsamhet med anledning av att könsfördelningen inte mötte upp kraven på variation, vilket gör det svårt att generalisera resultatet till populationen.
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Rexhaj, Behar, and Theresia Danielsson. "Patients with Lower Limb Amputation in Vietnam : A quantitative study on Patients’ Satisfaction with their given Prosthetic Device and Service." Thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ. Ortopedteknisk plattform, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-36072.
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Aim: The aim of this thesis is to evaluate patients’ satisfaction with prosthetic device and service on lower limb amputations in Danang, Vietnam and to implement comparisons between the subgroups gender, living area, amputation cause and level. Method: A cross-sectional study design was conducted using the Quebec User Evaluation of Satisfaction with assistive Technology (QUEST) 2.0 questionnaire to measure patients’ satisfaction. Fifty patients were recruited through the International Committee of the Red Cross (ICRC) and the data collection was performed in the patients own homes with an interpreter. The collected data was statistically analyzed with suitable tests using Statistical Package for the Social Sciences (SPSS). Result: The patients were quite satisfied with their prosthetic devices (mean 4.16 SD ± 0.561) and more or less satisfied with their given services (mean 2.83 SD ± 1.213). Significant differences were found between genders regarding the patients’ satisfaction with prosthetic device. There were no significant differences between the remaining subgroups; living area, amputation cause and amputation level. Conclusion: This thesis demonstrates that the patients in Danang appear to be quite satisfied with their prosthetic device, even though they reported problems with the durability of the device. Furthermore, the patients were more or less satisfied with their prosthetic services. The findings in this thesis also reveals that women were less satisfied compared to men regarding the prosthetic device. These conclusions should however be taken with caution, since the reliability and validity was lower than desired and it’s difficult to generalize the results to the population.<br>Syfte: Syftet med denna studie är att evaluera patienters nöjdhet med deras utgivna protes och service på nedre extremitetsamputerade i Danang, Vietnam och att implementera jämförelser mellan subgrupperna kön, bostadsområde, amputations- orsak och nivå. Metod: En cross-sectional studiedesign blev utförd genom användning av Quebec User Evaluation of Satisfaction with assistive Technology (QUEST) 2.0 enkäten för att mäta patienters nöjdhet. Femtio patienter blev rekryterade genom International Committee of the Red Cross (ICRC) och datainsamlingen blev utförd i patienternas egna hushåll med en tolk. Den insamlade datan blev statistiskt analyserad med lämpliga tester genom användning av Statistical Package for the Social Sciences (SPSS). Resultat: Patienterna var ganska nöjda med deras utgivna proteser (medelvärde 4,16 SD ± 0,561) och mer eller mindre nöjda med deras utgivna service (medelvärde 2,83 SD ± 1,213). Signifikanta skillnader hittades mellan kön gällande patienters nöjdhet med deras utgivna protes. Det fanns inga signifikanta skillnader mellan de resterande subgrupperna; bostadsområde, amputationsorsak och amputationsnivå. Slutsats: Den här studien demonstrerar att patienterna i Danang verkar vara ganska nöjda med deras utgivna proteser, fastän de rapporterade problem med protesens hållbarhet. Dessutom var patienterna mer eller mindre nöjda med deras utgivna service. Fynden i denna studie påvisar också att kvinnorna var mindre nöjda gällande protesen jämfört med männen. Dessa slutsatser skall dock tas med aktsamhet, eftersom reliabiliteten och validiteten blev lägre än önskat och det var svårt att generalisera resultaten till populationen.
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Omasta, Milan. "Pevnostní analýza protézy dolní končetiny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228770.
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This masters´s thesis deals with computational modeling of transtibial lower-limb prosthesis. For assesment of loading character and geometrical configuration, the gait analysis of an amputee, including ground reaction force measurement, strain gauge analysis and motion analysis, was accomplished. Information on geometry was obtained using 3D optical scanning procedure. Material model was gathered using non-destructive mechanical testing and mimicked in a FEA software. For loading conditions the static structure analysys using FEM was accomplished. The critical poins in construction was found. Recognition of agreement about experimental and computational model was accomplished.
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Scopes, Judy. "Outcome measures of physical function in adult unilateral lower limb amputees during prosthetic rehabilitation : use in clinical practice and psychometric properties." Thesis, Queen Margaret University, 2016. https://eresearch.qmu.ac.uk/handle/20.500.12289/7422.
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The aim of this thesis is to inform clinicians and researchers of the reliability and responsiveness of the most commonly used outcome measures in prosthetic rehabilitation in the UK. In addition, this thesis supports the call for more studies of high methodological quality to provide evidence of the psychometric properties of outcome measures of physical function in lower limb amputees. A survey (study I) of Allied Health Professionals established that the outcome measures used most often during prosthetic rehabilitation in the UK were: the Timed Up and Go (TUG), a timed walk test, the Locomotor Capability Index (LCI) and its modified version (LCI-5), the Socket Comfort Score (SCS) and the Special Interest Group in Amputee Medicine (SIGAM) Mobility Grades. A standardised quality checklist (COSMIN) was used in a systematic review (study II) to measure the methodological quality and strength of evidence of the published literature that reported on the psychometric properties of outcome measures used to measure physical function during prosthetic rehabilitation. The review found mixed methodological quality ratings and many studies with small sample sizes rendering the strength of the evidence indeterminate. A limited number of studies commented on limits of agreement and measurement error when reporting on reliability. Even fewer studies reported on responsiveness with only one reporting minimally clinically important difference (MCID) values. Values for consistency, agreement and measurement error, were calculated for the top five commonly used outcome measures as identified from the survey, using a test-retest study design with a period of 7 days between tests (study III). Minimum detectable change (MDC) values were calculated for the SIGAM, LCI-5, TUG and 2MWT. The EQ-5D-5LTM, a measure of the global health of the respondent, was also included as knowledge of its psychometric properties in a population of pwLLA is unknown. However, reliability could not be confirmed for the EQ-5D-5L or the SCS in this population. A longitudinal study (study IV), based during the early rehabilitation period (mean 84 days) following provision of a primary prosthesis, gathered data to calculate indices of responsiveness for the same six outcome measures. Effect sizes were presented for five measures: SIGAM, LCI-5, TUG, 2MWT, SCS and EQ-5D-5L. Minimal clinically important difference values were also presented for the first time for all the outcome measures in this population. A patient reported change questionnaire was used as the anchor in a Receiver Operator Characteristic (ROC) curve analysis to establish the MCID values.
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Gharechaie, Arman Tommy, and Omid Darab. "Achieving New Standards in Prosthetic Socket Manufacturing." Thesis, Mälardalens högskola, Innovation och produktrealisering, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-45231.
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Preface: The research about product development of a prosthetic socket was conducted by two students from Mälardalen University, department of Innovation, Design, and Technology. Background: The most recent public survey shows that an estimated 5 million people in China are amputees, out of which a significantly large portion are below-elbow amputees. Sockets sold to below-elbow amputees are equipped with only two surface electromyography sensors, has low comfortability, has problems with perspiration, and a high weight. The current standard for socket manufacturing has not changed in decades. Research Questions: The following research questions have determined the direction of the research: (1) What measurable factors contribute to a convenient and ergonomic feature design in prosthetic socket from the end-user’s perspective? (2) How can the weight and functionality be improved to achieve a prosthetic socket more suited to the end-user, with respect to the existing prosthetic socket? (3) Which material and manufacturing method is suitable for producing cost-effective and customized prosthetic sockets? Research Method: The research was guided by the 5th edition of Product Design and Development by Ulrich & Eppinger (2012) where the product development process described in five of the six phases from planning to test and refinement were utilized. The data collection and analysis techniques performed in this research was guided by Research Methods for Students, Academics and Professionals by Williamson & Bow (2002). Interviews were conducted with five different stakeholders to find specifications of requirements and concretize subjectivism of what defines quality and ergonomics. Implementation: Currently, below-elbow amputees order sockets from orthopedic clinics. The socket was identified as a product of Ottobock. Investigations were made to find optimal solutions to the specification of requirements. Results: The development of a socket concept was designed for additive manufacturing using a multi-jet fusion printer. Analysis: This concept had significant improvements to parameters: higher grade of customizability, 30 % reduced weight, 48 % cost reduction, a new production workflow with 93,5 % automation, and a 69 % reduction in manual work hours. Conclusions: The data of the research strongly indicate existing potentials in enhancing socket design techniques and outputs by implementation of additive manufacturing processes. This can prove to be beneficial for achieving more competitive prosthetics and associated services.<br>Förord: Denna forskning om produktutvecklingsprocessen av en armprotes genomfördes av två studenter från Mälardalens universitet, avdelningen för innovation, design och teknik. Bakgrund: Den senaste offentliga undersökningen visar att cirka 5 miljoner människor i Kina är amputerade, varav en betydligt stor del är under-armbågsamputerade. Armproteser som säljs till underarmsamputerade individer är utrustade med endast två yt-elektromyografiska sensorer, har låg komfort, har problem med perspiration och hög vikt. Den nuvarande standarden för armproteser har inte förändrats under årtionden. Forskningsfrågor: Följande forskningsfrågor har bestämt riktningen för forskningen: (1) Vilka mätbara faktorer bidrar till en praktisk och ergonomisk funktionsdesign i underarmsproteser ur slutanvändarens perspektiv? (2) Hur kan vikten och funktionaliteten förbättras för att åstadkomma en underarmsprotes som är bättre anpassad för slutanvändaren med avseende på den befintliga underarmsprotesen? (3) Vilket material och tillverkningsmetod är lämpligt för att producera kostnadseffektiva och anpassade underarmsproteser? Forskningsmetod: Forskningsmetoden styrdes av den femte upplagan av Product Design and Development av Ulrich & Eppinger (2012) där produktutvecklingsprocessen är uppdelad i sex faser. I denna forskning användes de fem första faserna från planering till testning och justering. Tekniker för datainsamling och analys som användes i denna forskning styrdes av Research Methods for Students, Academics and Professionals av Williamson & Bow (2002). Intervjuer genomfördes med fem olika intressenter för att hitta kravspecifikationer och för att konkretisera subjektivitet för vad som definierar kvalitet och ergonomi. Implementering: Underarmsamputerade individer beställer för närvarande armproteser från ortopediska kliniker. Armprotesen identifierades som en produkt av Ottobock. Undersökningar gjordes för att hitta optimala lösningar för kravspecifikationen. Resultat: Konceptutvecklingen av en armprotes utformades för additiv tillverkning med hjälp av en multi-jet-fusion-skrivare. Analys: Det här konceptet hade betydande förbättringar av parametrar: högre grad av anpassningsbarhet, 30 % minskad vikt, 48 % kostnadsreduktion, ett nytt produktionsflöde med 93,5 % automatisering och en 69 % minskning av manuella arbetstider. Slutsatser: Data från denna forskning indikerar att det finns starkt potential för att förbättra designtekniker och utgångar av underarmsproteser genom implementering av additiva tillverkningsprocesser. Detta kan visa sig vara fördelaktigt för att uppnå mer konkurrenskraftiga proteser och tillhörande tjänster.
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Kaur, Subhpreet. "Additive manufacturing of upper and lower prosthetic limbs." Thesis, California State University, Long Beach, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10038435.
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<p>Touch 3D Bionics is a start-up prostheses company that will use additive manufacturing methods to produce prosthetic limbs. The company will provide patients with affordable, sustainable, customized, and durable 3D printed robotic prosthetics. Additive manufacturing usage can offer several benefits, such as personalized and modified medical devices and products, lower cost, improved throughput, and improved teamwork. </p><p> Furthermore, there are, approximately, 2 million amputees living in the United States. Therefore, the target market of the company will be state-approved hospitals all around California. The company will contract with hospitals in California and provide hospitals’ patients with more affordable options of prosthetic limbs. Engineers will use plaster impression of limbs, reverse engineer the impression to form a 3D model of the limb and, eventually, print the limb using additive manufacturing methods. Due to very small market competition, the company seeks to make significant profit from the new additive manufacturing techniques. </p>
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Märtson, Aare. "Lower limb lengthening : /." Tartu : Tartu University Press, 2006. http://dspace.utlib.ee/dspace/bitstream/10062/118/1/martson.pdf.
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Hultgren, Rebecka. "Lower limb ischemia in women /." Stockholm, 2004. http://diss.kib.ki.se/2003/91-7349-798-3.
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Howd, Alison. "The critically ischaemic lower limb." Thesis, University of Newcastle Upon Tyne, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241411.
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