The effect of prosthetic alignment on the stump temperature and ground reaction forces during gait in transfemoral amputees

Cárdenas, Álvaro E. Márquez; Uribe, Juliana; Font-Llagunes, Josep M.; Plata, Jesús A.

doi:10.1016/j.gaitpost.2022.04.003

Cited by 7 publications

(4 citation statements)

References 23 publications

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“…The method is intuitive and easy to find the discrepancy between the unaffected and amputated legs. However, the research clarifies that static alignment may not directly relate to ground reaction forces (GRF) due to the compensatory mechanisms adopted by amputees to adapt to alignment changes [ 13 ]. The limitations of static gait analysis and the compensatory mechanisms employed by amputees necessitate the development of novel, clinically applicable gait analysis tools, capable of dynamically assessing joint alignment during walking, to facilitate a comprehensive evaluation of gait parameters in post-prosthetic amputees.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to the traditional static alignment that primarily emphasizes aligning the prosthesis while the user is stationary, dynamic alignment encompasses the complete three-dimensional joint ranges of motion during walking. Traditionally, dynamic alignments have been assessed by prosthetists through observing amputees’ walking patterns and listening to their feedback and concerns [ 12 , 13 , 14 ]. For decades, to acquire dynamic alignments, optical motion capture systems have been regarded as a gold standard.…”

Section: Introductionmentioning

confidence: 99%

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Inertial Measuring System to Evaluate Gait Parameters and Dynamic Alignments for Lower-Limb Amputation Subjects

Han,

Cai,

Pan

2024

Sensors

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The study aims to construct an inertial measuring system for the application of amputee subjects wearing a prosthesis. A new computation scheme to process inertial data by installing seven wireless inertial sensors on the lower limbs was implemented and validated by comparing it with an optical motion capture system. We applied this system to amputees to verify its performance for gait analysis. The gait parameters are evaluated to objectively assess the amputees’ prosthesis-wearing status. The Madgwick algorithm was used in the study to correct the angular velocity deviation using acceleration data and convert it to quaternion. Further, the zero-velocity update method was applied to reconstruct patients’ walking trajectories. The combination of computed walking trajectory with pelvic and lower limb joint motion enables sketching the details of motion via a stickman that helps visualize and animate the walk and gait of a test subject. Five participants with above-knee (n = 2) and below-knee (n = 3) amputations were recruited for gait analysis. Kinematic parameters were evaluated during a walking test to assess joint alignment and overall gait characteristics. Our findings support the feasibility of employing simple algorithms to achieve accurate and precise joint angle estimation and gait parameters based on wireless inertial sensor data.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inertial Measuring System to Evaluate Gait Parameters and Dynamic Alignments for Lower-Limb Amputation Subjects

Han,

Cai,

Pan

2024

Sensors

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“…Notably, for individuals with uTFA, adding the socket extension angle or shifting the socket posteriorly in the sagittal plane increases knee extension moment, while adding the socket abduction angle or laterally moving the socket in the coronal plane increases the knee valgus moment and vice versa [11]. Malalignment significantly alters the magnitude and loading pattern of ground reaction force (GRF) [12,13]. Investigating COP dynamics may aid in optimizing prosthetic alignment to minimize the risk of injuries.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Center of Pressure Trajectory in Gait: Unilateral Transfemoral Amputees Versus Non-Disabled Individuals

He,

Hu,

Jor

et al. 2024

IEEE Trans. Neural Syst. Rehabil. Eng.

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The primary goal of rehabilitation for individuals with lower limb amputation, particularly those with unilateral transfemoral amputation (uTFA), is to restore their ability to walk independently. Effective control of the center of pressure (COP) during gait is vital for maintaining balance and stability, yet it poses a significant challenge for individuals with uTFA. This study aims to study the COP during gait in individuals with uTFA and elucidate their unique compensatory strategies. This study involved 12 uTFA participants and age-matched non-disabled controls, with gait and COP trajectory data collected using an instrumented treadmill. Gait and COP parameters between the control limb (CL), prosthetic limb (PL), and intact limb (IL) were compared. Notably, the mediolateral displacement of COP in PL exhibited significant lateral displacement compared to the CL from 30% to 60% of the stance. In 20% to 45% of the stance, the COP forward speed of PL was significantly higher than that of the IL. Furthermore, during the initial 20% of the stance, the vertical ground reaction force of PL was significantly lower than that of IL. Additionally, individuals with uTFA exhibited a distinct gait pattern with altered duration of loading response, single limb support, pre-swing and swing phases, and step time. These findings indicate the adaptability of individuals with uTFA in weight transfer, balance control, and pressure distribution on gait stability. In conclusion, this study provides valuable insights into the unique gait dynamics and balance strategies of uTFA patients, highlighting the importance of optimizing prosthetic design, alignment procedures, and rehabilitation programs to enhance gait patterns and reduce the risk of injuries due to compensatory movements.

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“…Krishnamoorthy and Karthikeyan [6] have used this prosthetic foot to determine the pressure, weight, position, and movement of the remaining appendage as for the prosthetic attachment, and have create sensors and actuators-based prostheses, which plays an important role in the prosthetic socket fabrication, modification and optimal fit. Instead, Cardenas et al [7] have identified the effect of the transfemoral alignment prosthesis on ground reaction forces and thermal images of the residual limb using Jaipur foot. They found no significant changes in the average temperature of residual limbs and the transfemoral prosthesis misalignment produced an irregular heat diffusion on the anterior, posterior, and lateral sides of the stump contour.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the redesign of a prosthesis joint using finite element analysis

Olaya Mira,

Rivera Velásquez,

Plata Contreras

2023

Ing.USBMed

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El pie de Jaipur es una prótesis ideal para amputados en países en desarrollo porque está hecho de materiales económicos y se centra en la asequibilidad y la funcionalidad. Algunos estudios han examinado las áreas del pie de Jaipur que presentan mayor daño, pero no la unión entre el tubo de polietileno de alta densidad y el pie protésico. Se pretende evaluar diferentes diseños para la unión entre el Pie de Jaipur y el tubo de esta prótesis exoesquelética mediante análisis de elementos finitos. La geometría del pie de Jaipur se modeló utilizando escaneo 3D. Se realizaron múltiples simulaciones utilizando elementos finitos. Los modelos de unión que incluyen pernos múltiples presentaron fallas por esfuerzos máximos sobre el bloque de madera. Por el contrario, el modelo con un solo perno no falló y el modelo adhesivo resultó ser la mejor solución a la unión entre los componentes de la prótesis. La mejor opción de unión es el adhesivo epóxico ya que las cargas están más uniformemente distribuidas. Por lo tanto, se puede controlar más eficientemente el daño en esa zona, alargando así la vida útil de la prótesis.

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The effect of prosthetic alignment on the stump temperature and ground reaction forces during gait in transfemoral amputees

Cited by 7 publications

References 23 publications

Inertial Measuring System to Evaluate Gait Parameters and Dynamic Alignments for Lower-Limb Amputation Subjects

Inertial Measuring System to Evaluate Gait Parameters and Dynamic Alignments for Lower-Limb Amputation Subjects

Dynamics of Center of Pressure Trajectory in Gait: Unilateral Transfemoral Amputees Versus Non-Disabled Individuals

Evaluating the redesign of a prosthesis joint using finite element analysis

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