Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 37 for “"transtibial"”.
-
Design and Efficacy of a Variable Thickness Transtibial Prosthetic Liner
Significant advancements in the socket design process have improved fit and comfort, however, the prosthetic liner remains a largely unaltered component with the potential to mitigate socket pain, discomfort, and irritation. During periods of prolonged knee flexion a conventional liner can cause …
-
Design and Clinical Evaluation of a Digital Transtibial Prosthetic Interface
… algorithm to create subject-specific transtibial liner and socket components that can be additively manufactured at low cost. The residual limb is imaged using a magnetic resonance imaging (MRI) device, and the image set is segmented into a three-dimensional model. This approach is …
-
Development of a powered transtibial prosthesis for ball room dancing
Research on lower extremity prostheses has primarily focused on activities of daily living, such as walking and running, but has largely overlooked less common activities. As a result, traditional prosthetic devices are designed for a walking/running gait, and are difficult to use for other …
-
A Patient Education Packet for Transtibial Amputees Including Instructional DVD and Booklet
The file named "SestoLaura.pdf" is the primary dissertation file. All other files ("*.pdf") are supplemental files and may be viewed individually.
-
Development and evaluation of biarticular transtibial prostheses for level-ground amputee walking
… strides have been made toward the development of transtibial prostheses that match the functionality of their corresponding biological structures. However, these devices are fundamentally limited because they only emulate the biological ankle-foot complex. In contrast, the gastrocnemius calf …
-
Segmental Movement Compensations in Patients with Transtibial Amputation Identified Using Angular Momentum Separation
<p>Patients with unilateral dysvascular transtibial amputation (TTA) adopt movement compensations that are required to maintain balance and achieve ambulation in the absence of ankle plantar flexion, and result in increased and asymmetric joint loading patterns. As a result, this population is at …
-
Hip and Knee Biomechanics for Transtibial Amputees in Gait, Cycling, and Elliptical Training
<p>Transtibial amputees are at increased risk of contralateral hip and knee joint osteoarthritis, likely due to abnormal biomechanics. Biomechanical challenges exist for transtibial amputees in gait and cycling; particularly, asymmetry in ground/pedal reaction forces and joint kinetics is well …
-
Resting State Neurophysiology of Agonist-Antagonist Myoneural Interface in Persons with Transtibial Amputation
… state functional connectivity in patients with transtibial AMI (n=12) and traditional (n=7) amputations, as well as biologically intact control subjects (n=10). We hypothesized that the AMI surgery will induce functional network reorganization that significantly differs from the traditional …
-
COMPENSATORY HIP AND KNEE MECHANICS IN TRANSTIBIAL AMPUTEES DURING STAIR DESCENT AND DIRECTIONAL TASK
… compared lower limb mechanics in unilateral transtibial amputees and able bodied controls during strenuous activities of daily living (ADL). Seven unilateral transtibial amputee and five matched-abled bodied control participants executed stair descent on a four-step rehabilitation staircase …
-
Human Knee FEA Model for Transtibial Amputee Tibial Cartilage Pressure in Gait and Cycling
… higher for persons who have suffered a transtibial amputation. Abnormal cartilage stress can cause higher OA risk, however it is unknown if there is a connection between exercise type and cartilage stress. To help answer this, a tibiofemoral FEA model was created. Utilizing linear …
-
Biomechanics and quality of life in transtibial amputees during and following rehabilitation : a longitudinal study
… and quality of life (QOL) characteristics of transtibial amputees. However, no studies to date have outlined how these characteristics develop over time. The aim of this thesis, therefore, was to investigate the longitudinal changes that occurred in unilateral transtibial amputee movement, …
-
The use of a novel residuum model to design a variable-impedance transtibial prosthetic socket
… approach to evaluate and validate a transtibial residuum biomechanical model. The central hypothesis of the work is that a single biomechanical model can predict the large non-linear response at various sites on a residuum under load. To evaluate this hypothesis, a non-linear, …
-
Effect of prosthetic alignment on muscle activity for people with a unilateral transtibial amputation during sit-to-stand, The
… on muscle activity for people with a unilateral transtibial amputation (TTA) during sit-to-stand. Characterizing this muscle activity will contribute to the understanding of altered motion strategies associated with TTA and how they may contribute secondary conditions. Further, this work will …
-
Biomechanical and psychological factors that distinguish fallers from non-fallers : a comparative study of transtibial amputees and able bodied individuals
Transtibial amputees are at a higher risk of falling than age-matched able-bodied individuals. In order to make recommendations for falls prevention and treatment programmes, it is important to have a sound understanding of the underlying biomechanical function in persons at high risk of falling. …
-
Performance evaluation of an ensemble neural network system of estimating transtibial prosthetic socket pressures during standing, walking and condition perturbation.
… dynamic situations. A wireless system estimating transtibial socket pressure distribution was produced. When supplied with simulated socket loads, an estimate produced from a group of networks (an ensemble) demonstrated improved accuracy and reduced variance. Work was undertaken to identify …
-
Prosthetic socket design : from a multi-indenter device for in vivo biomechanical tissue measurement to a quasi-passive transtibial socket interface
… and a quasi-passive variable-impedance transtibial socket interface. An active indenter platform called the FitSocket is presented. To assess residual-limb tissue biomechanics, the FitSocket comprised 14 position and force controllable actuators that circumferentially surround a …
-
Achieving Near-Natural Locomotion in Transfemoral Amputees - A Control Theoretic Approach
… conditions. Among lower limb amputations, transtibial amputations are the most common. The loss of the ankle joint for transtibial amputees causes several constraints during gait, such as lower walking speed, increased metabolic energy expenditure, and reduced power in the amputated limb …
-
Design and Evaluation of a Quasi-Passive Variable Stiffness Ankle-Foot Prosthesis to Improve Biomechanics Across Walking Speeds
… and general deconditioning [2]. For people with transtibial (below-knee) amputation, prevalence of knee osteoarthritis in the contralateral limb is 17x higher than in the general population, with 27% of people with unilateral amputation developing knee osteoarthritis [3]. This large increase in …
-
Powered ankle-foot prosthesis for the improvement of amputee walking economy
… positive work. Clinical studies indicate that transtibial amputees using conventional prostheses exhibit higher gait metabolic rates as compared to intact individuals. Researchers believe the main cause for the observed increase in metabolism is due to the inability of conventional prostheses …
Page 1 of 2