The goal of this study was to evaluate biomechanical differences between healthy subjects and those with ankle instability during the gradual onset of lower extremity fatigue from a landing activity. An understanding of these differences is needed in order to prevent future injury to or further debilitation in individuals with ankle instability. A functional fatiguing activity was designed to focus fatigue on the quadriceps muscles, as those are the muscles most frequently fatigued during sport. Measures were taken throughout the progression of fatigue with a force plate and a motion tracking system and included vertical ground reaction force and lower extremity kinetics, kinematics, and energetics. The time required to reach self-reported fatigue and a balance assessment, the Star Excursion Balance Test, before and after the onset of fatigue was also recorded. Significant differences were observed between groups in peak ground reaction force, ground reaction force impulse, and frontal plane ankle joint impulse. Results indicated that subjects with ankle instability not only exhibited a different baseline for most measurements than normal subjects, but also managed the progression of fatigue differently. With this information and information from further studies, recommendations and/ or training schemes could be made and implemented to help those with ankle instability avoid recurrent injuries.

Title Physiotherapy after arthroplasty procedures for rheumatic patients. Defining the problem The main problem this thesis solves is to find and compare findings on the practice of physiotherapy in rheumatic patients, patients with rheumatoid arthritis (RA) who have undergone surgery, joint replacement of lower limb arthroplasty, with a focus on the ankle joint. It will be a comparison of the approaches used in the workplace catchment for the Czech Republic, Institute of Rheumatology (RU) in Prague and the world. Aim The aim is to create a comprehensive overview and comparison of physiotherapy procedures used in rheumatic patients who underwent joint replacement legs, zjm. ankle joint, in the CR is in the hands, and in the world and see whether these practices vary significantly, or are identical. The method of solution The work is prepared by comparing the findings relating to the care of patients with available literature. The findings are grouped and arranged tables are created with recording procedures. The work is written in the form of research. Key worlds revmatoidní artritida totální náhrada hlezenního kloubu (TEP) hlezenní kloub fyzioterapie

Objetivo: Este trabalho tem como objetivo a avaliação dos resultados funcionais, e da incidência da instabilidade articular mecânica, resultantes do tratamento clínico das lesões ligamentares primárias, agudas e graves do tornozelo (associada a instabilidade articular). Esta lesão é extremamente frequente e acomete indivíduos jovens, economicamente e fisicamente ativos, causando prejuízos pessoais e econômicos importantes. Existe dificuldade no adequado diagnóstico e heterogeneidade na escolha da melhor forma de tratamento. Materiais e métodos: Foram incluídos neste estudo 186 pacientes portadores de lesão ligamentar aguda grave do tornozelo. A amostra foi randomizada em dois grupos de tratamento clínico. Os pacientes incluídos no grupo A foram tratados com uso de imobilização suro podálica imediata (RobofootR), carga permitida conforme tolerado, analgesia, gelo, elevação e mobilização leve da articulação do tornozelo por três semanas. Em seguida foram imobilizados com órtese curta funcional (AircastR esportivo) por mais três semanas, e encaminhado para programa de reabilitação fisioterápico. No grupo B os pacientes foram imobilizados no primeiro atendimento com órtese curta funcional (AircastR esportivo), a carga foi permitida conforme tolerado, analgesia, gelo, elevação e mobilização leve da articulação realizadas por três semanas, e em seguida foram encaminhados para programa de tratamento fisioterápico, como no grupo A. Os pacientes são avaliados clínica e radiograficamente para determinar a limitação funcional nas diversas fases do processo cicatricial, e a presença de instabilidade residual nos tornozelos. Resultados: Não encontramos diferença significativa com relação à evolução para instabilidade mecânica entre os grupos. Da mesma forma não houve diferença na incidência de dor, mas a avaliação através do método de pontuação da Associação Americana dos Cirurgiões de pé e tornozelo (AOFAS) mostrou melhores resultados nos pacientes submetidos ao tratamento com órtese funcional (grupo B). Conclusões: O tratamento das lesões ligamentares graves através do uso de órtese funcional tem melhores resultados do que o tratamento com órtese rígida. A incidência de instabilidade crônica foi muito pequena nos dois grupos / Objective: The objective of this study is to investigate functional results and the incidence of mechanical ankle instability, following conservative treatment of the first episode involving severe lateral ankle ligamentar lesions (with articular instability). This common lesion most often affects young, professional and physically active patients, causing serious personal and economic consequences. Adequate diagnosis is challenging and treatment alternatives for these lesions vary considerably. Methods and cases: 186 patients with severe lateral ankle ligamentar lesions were included in this study. Patients were randomized in two conservative treatment option groups. In group A, patients were treated with long ankle orthosis (RobofootR), comfortable weight bearing allowed, pain management, ice and elevation with restricted joint mobilization for three weeks. After this, they were placed in a short, functional orthosis (AircastR) for an additional three weeks period, with rehabilitation program commencing. In group B, patients were initially immobilized using a functional orthosis (sportive AircastR), and followed the above mentioned sequences for patients in group A. Patients were clinically and radiographically evaluated to determine the functional deficit in each phase, and the presence of ankle residual instability. Results: No significant differences were found in relation to the residual mechanical ankle instability between both groups. Additionally no differences were found in pain intensity, however, the functional evaluation using the American Orthopaedic Foot and Ankle Society (AOFAS) ankle and hind foot score system showed better results in the functional orthosis treatment group (group B). Conclusions: The treatment of severe lateral ankle ligamentar lesions, using functional orthosis, has shown better results over those treated with a rigid orthosis, and both methods presented a very low incidence of residual chronic instability

After investigating the injury mechanism, this dissertation aims to design an intelligent sprain-free sports shoe for the prevention of sport-related ankle sprain injury. It consists of a three-step mechanism: (1) Sensing, (2) Identification, and (3) Correction. The progress of this dissertation covers two options of sensing and identification. The first option is to monitor the ankle spraining motion with the ankle inversion angle. A method to employ two tiny inertial and magnetic sensors at the shank and foot segment is adopted as the sensing system. A laboratory study is conducted to obtain ankle inversion magnitude and velocity during various sport motions. Together with the article kinematics reported in the accidental sprain case report, a standard for identifying ankle sprain is established. The second option is to monitor the ankle spraining motion with the ankle supination torque. A feasible method to estimate the complete ground reaction forces with the information from pressure insoles is presented. Then, a tiny in-shoe three-pressure-sensor system is devised to monitor the ankle supination torque during sport motions. With the information of failure torque at the ankle joint reported by previous cadaveric study, an identification system of the ankle supination torque is devised. / Ankle sprain injury is the most common single type of sport-related musculoskeletal trauma which causes rupture and tear to the anterior talofibular ligament and ankle instability. In this dissertation, a new paradigm, "Orthopaedic Sport Biomechanics", is proposed to present the role of biomechanics in the practice of orthopaedics sports medicine, including the analysis of injury mechanism, and the design of prophylactic equipment for injury prevention. To directly investigate the injury, a case report of an accidental injury event in laboratory is presented. It was found that an internally rotated ankle orientation at foot strike may predispose the ankle joint to a supination sprain injury, by triggering lateral drift of the rearfoot and the subsequent vigorous inversion. At injury, the ankle joint reached an inversion of 48 degrees and an internal rotation of 10 degrees. / Future studies on the sensing and identification process, the correction, and the final evaluation are suggested. We hope that we could really invent the sprain-free shoe to help reducing the incidence of ankle sprain injury in sports in future. / Fong, Tik Pui Daniel. / Adviser: Kai-Ming Chan. / Source: Dissertation Abstracts International, Volume: 70-06, Section: B, page: 3635. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2008. / Includes bibliographical references (leaves 102-127). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstracts in English and Chinese. / School code: 1307.

Thesis (Ph. D.)--University of Washington, 2005. / Vita. Includes bibliographical references.

Objetivo: Este trabalho tem como objetivo a avaliação dos resultados funcionais, e da incidência da instabilidade articular mecânica, resultantes do tratamento clínico das lesões ligamentares primárias, agudas e graves do tornozelo (associada a instabilidade articular). Esta lesão é extremamente frequente e acomete indivíduos jovens, economicamente e fisicamente ativos, causando prejuízos pessoais e econômicos importantes. Existe dificuldade no adequado diagnóstico e heterogeneidade na escolha da melhor forma de tratamento. Materiais e métodos: Foram incluídos neste estudo 186 pacientes portadores de lesão ligamentar aguda grave do tornozelo. A amostra foi randomizada em dois grupos de tratamento clínico. Os pacientes incluídos no grupo A foram tratados com uso de imobilização suro podálica imediata (RobofootR), carga permitida conforme tolerado, analgesia, gelo, elevação e mobilização leve da articulação do tornozelo por três semanas. Em seguida foram imobilizados com órtese curta funcional (AircastR esportivo) por mais três semanas, e encaminhado para programa de reabilitação fisioterápico. No grupo B os pacientes foram imobilizados no primeiro atendimento com órtese curta funcional (AircastR esportivo), a carga foi permitida conforme tolerado, analgesia, gelo, elevação e mobilização leve da articulação realizadas por três semanas, e em seguida foram encaminhados para programa de tratamento fisioterápico, como no grupo A. Os pacientes são avaliados clínica e radiograficamente para determinar a limitação funcional nas diversas fases do processo cicatricial, e a presença de instabilidade residual nos tornozelos. Resultados: Não encontramos diferença significativa com relação à evolução para instabilidade mecânica entre os grupos. Da mesma forma não houve diferença na incidência de dor, mas a avaliação através do método de pontuação da Associação Americana dos Cirurgiões de pé e tornozelo (AOFAS) mostrou melhores resultados nos pacientes submetidos ao tratamento com órtese funcional (grupo B). Conclusões: O tratamento das lesões ligamentares graves através do uso de órtese funcional tem melhores resultados do que o tratamento com órtese rígida. A incidência de instabilidade crônica foi muito pequena nos dois grupos / Objective: The objective of this study is to investigate functional results and the incidence of mechanical ankle instability, following conservative treatment of the first episode involving severe lateral ankle ligamentar lesions (with articular instability). This common lesion most often affects young, professional and physically active patients, causing serious personal and economic consequences. Adequate diagnosis is challenging and treatment alternatives for these lesions vary considerably. Methods and cases: 186 patients with severe lateral ankle ligamentar lesions were included in this study. Patients were randomized in two conservative treatment option groups. In group A, patients were treated with long ankle orthosis (RobofootR), comfortable weight bearing allowed, pain management, ice and elevation with restricted joint mobilization for three weeks. After this, they were placed in a short, functional orthosis (AircastR) for an additional three weeks period, with rehabilitation program commencing. In group B, patients were initially immobilized using a functional orthosis (sportive AircastR), and followed the above mentioned sequences for patients in group A. Patients were clinically and radiographically evaluated to determine the functional deficit in each phase, and the presence of ankle residual instability. Results: No significant differences were found in relation to the residual mechanical ankle instability between both groups. Additionally no differences were found in pain intensity, however, the functional evaluation using the American Orthopaedic Foot and Ankle Society (AOFAS) ankle and hind foot score system showed better results in the functional orthosis treatment group (group B). Conclusions: The treatment of severe lateral ankle ligamentar lesions, using functional orthosis, has shown better results over those treated with a rigid orthosis, and both methods presented a very low incidence of residual chronic instability

Background: This study, the first of its kind, originated with the need for a brace (an ankle foot orthosis), to constrain ankle plantarflexion and dorsiflexion within a motion threshold of <5°. A conventional thermoplastic, solid brace failed during a quasi-static loading study, informing the investigation and development of an experimental carbon composite brace, maximizing stiffness and proximity of shank and foot cylindrical shells to provide the required degree of control. Methods: Two experiments were conducted: a quasi-static loading study, using cadaveric limbs (n = 2), and a gait study with healthy subjects (n = 14). Conditions tested were STOP, FREE, and CONTROL. Data for all studies were collected using six motion-capture cameras (Vicon, Oxford, UK; 120 Hz) tracking bone-anchored markers (cadaveric limbs) and skin-anchored markers (subjects). In the quasi-static loading study, loading conditions were congruent with the gait study. Study 1 involved a quasi-static loading analysis using cadaveric limbs, compared motion data from a conventional thermoplastic solid brace and the experimental brace. Study 2 involved quantifying ankle plantarflexion and dorsiflexion in subjects during treadmill walking, in brace STOP, FREE, and CONTROL conditions. Findings: The experimental brace in STOP condition consistently constrained ankle plantarflexion and dorsiflexion below the motion threshold of <5°, across all studies. Interpretation: Collectively, these findings demonstrate (1) that a conventional thermoplastic, solid brace was ineffective for clinical applications that required significant motion control, and (2) that ankle motion control is most effective when considered as a relationship between the brace, the ankle-foot complex, and the external forces that affect them both.

No description available.

Yes / Passive prosthetic devices are set up to provide optimal function at customary walking speed and thus may function less effectively at other speeds. This partly explains why joint kinetic adaptations become more apparent in lower-limb amputees when walking at speeds other than customary. The present study determined whether a trans-tibial prosthesis incorporating a dynamic-response foot that was attached to the shank via an articulating hydraulic device (hyA-F) lessened speed-related adaptations in joint kinetics compared to when the foot was attached via a rigid, non-articulating attachment (rigF). Eight active unilateral trans-tibial amputees completed walking trials at their customary walking speed, and at speeds they deemed to be slow-comfortable and fast-comfortable whilst using each type of foot attachment. Moments and powers at the distal end of the prosthetic shank and at the intact joints of both limbs were compared between attachment conditions. There was no change in the amount of intact-limb ankle work across speed or attachment conditions. As speed level increased there was an increase on both limbs in the amount of hip and knee joint work done, and increases on the prosthetic side were greater when using the hyA-F. However, because all walking speed levels were higher when using the hyA-F, the intact-limb ankle and combined joints work per meter travelled were significantly lower; particularly so at the customary speed level. This was the case despite the hyA-F dissipating more energy during stance. In addition, the amount of eccentric work done per meter travelled became increased at the residual knee when using the hyA-F, with increases again greatest at customary speed. Findings indicate that a trans-tibial prosthesis incorporating a dynamic-response foot reduced speed-related changes in compensatory intact-limb joint kinetics when the foot was attached via an articulating hydraulic device compared to rigid attachment. As differences between attachment conditions were greatest at customary speed, findings indicate a hydraulic ankle-foot device is most effectual at the speed it is set-up for.

Yes / Background Previous research has shown that use of a dynamic-response prosthetic foot (DRF) that incorporates a small passive hydraulic ankle device (hyA-F), provides certain biomechanical benefits over using a DRF that has no ankle mechanism (rigA-F). This study investigated whether use of a hyA-F in unilateral trans-tibial amputees (UTA) additionally provides metabolic energy expenditure savings and increases the symmetry in walking kinematics, compared to rigA-F. Methods Nine active UTA completed treadmill walking trials at zero gradient (at 0.8, 1.0, 1.2, 1.4, and 1.6 of customary walking speed) and for customary walking speed only, at two angles of decline (5° and 10°). The metabolic cost of locomotion was determined using respirometry. To gain insights into the source of any metabolic savings, 3D motion capture was used to determine segment kinematics, allowing body centre of mass dynamics (BCoM), differences in inter-limb symmetry and potential for energy recovery through pendulum-like motion to be quantified for each foot type. Results During both level and decline walking, use of a hyA-F compared to rigA-F significantly reduced the total mechanical work and increased the interchange between the mechanical energies of the BCoM (recovery index), leading to a significant reduction in the metabolic energy cost of locomotion, and hence an associated increase in locomotor efficiency (p < 0.001). It also increased inter-limb symmetry (medio-lateral and progression axes, particularly when walking on a 10° decline), highlighting the improvements in gait were related to a lessening of the kinematic compensations evident when using the rigA-F. Conclusions Findings suggest that use of a DRF that incorporates a small passive hydraulic ankle device will deliver improvements in metabolic energy expenditure and kinematics and thus should provide clinically meaningful benefits to UTAs’ everyday locomotion, particularly for those who are able to walk at a range of speeds and over different terrains. / Engineering and Physical Sciences Research Council(EPSRC, reference EP/H010491/1).