Exoesqueleto de cadera adaptativo para la mejora de la marcha por accidente cerebrovascular
Exoesqueleto de cadera motorizado para sobrevivientes de accidentes cerebrovasculares con deterioro de la marcha
Descripción general del estudio
Estado
Estado
Condiciones
Condiciones
Intervención / Tratamiento
Intervención / Tratamiento
Descripción detallada
Tipo de estudio
Tipo de estudio
Inscripción (Actual)
Inscripción
Fase
Fase
- No aplica
Contactos y Ubicaciones
Estudio Contacto
Estudio Contacto
- Nombre: Aaron Young, Ph.D.
- Número de teléfono: 404-385-5306
- Correo electrónico: aaron.young@me.gatech.edu
Copia de seguridad de contactos de estudio
- Nombre: Kinsey R Herrin, MSPO, C/LPO
- Número de teléfono: 470-578-7600
- Correo electrónico: kinsey.herrin@me.gatech.edu
Ubicaciones de estudio
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Georgia
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Atlanta, Georgia, Estados Unidos, 30332
- Exoskeleton and Prosthetic Intelligent Controls Lab
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Criterios de participación
Criterio de elegibilidad
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Descripción
Criterios de inclusión:
- Historia previa de accidente cerebrovascular con la aprobación de un médico para realizar con seguridad las actividades experimentales.
- El accidente cerebrovascular debe haber ocurrido al menos 6 meses antes de la participación en el estudio.
- Edad entre 18-85 años de edad.
- Puntuación superior a 17 en el mini-examen del estado mental (MMSE).
- Capaz de sentarse sin apoyo durante un mínimo de 30 segundos.
- Capaz de seguir un comando de 3 pasos.
- Debe poder caminar sin apoyo (se permite un riel según sea necesario), con una velocidad de caminata de al menos 0,4 m/s (velocidad ambulatoria comunitaria limitada).
- Debe ser capaz de caminar durante al menos 6 minutos.
- Debe estar dispuesto y ser capaz de participar en un experimento de 1 a 4 horas, con descansos aplicados regularmente y según sea necesario.
- Debe poder transferirse (de sentarse a pararse y de pararse a sentarse) sin apoyo externo (se permite el apoyo de los reposabrazos).
- Debe poder deambular sobre pendientes pequeñas (3 grados) y algunos pasos (6 pasos).
Criterio de exclusión:
- Pérdida de sensibilidad en las piernas, lesión completa de la médula espinal, antecedentes de conmoción cerebral en los últimos 6 meses, antecedentes de afecciones cardiovasculares graves, artritis grave o problemas ortopédicos que limitarían la participación plena en el estudio.
- Diagnóstico de otros trastornos neurológicos como la enfermedad de Parkinson, la esclerosis lateral amiotrófica (ELA), la esclerosis múltiple (EM), la demencia, antecedentes de traumatismo craneoencefálico que no se resolvió por completo (según el informe del participante), amputación de las extremidades inferiores, úlceras que no cicatrizan de un extremidades inferiores, diálisis renal o enfermedad hepática terminal, ceguera legal o discapacidad visual grave.
- Uso de marcapasos o tener implantes metálicos en la región de la cabeza o medicamentos que reducen los umbrales de convulsiones.
- Por último, si usted está participando en otro estudio clínico y/o su condición física se limita a realizar diferentes tareas, en opinión del Investigador Principal (PI), probablemente afectaría el resultado del estudio o confundiría los resultados, será excluido de el estudio.
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Ciencia básica
- Asignación: N / A
- Modelo Intervencionista: Asignación de un solo grupo
- Enmascaramiento: Ninguno (etiqueta abierta)
Número de brazos
Armas e Intervenciones
Grupo de participantes/brazoGrupo de participantes/brazo |
Intervención / TratamientoIntervención / Tratamiento |
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Experimental: Hip Exoskeleton for Stroke Gait Assistance
This study will be conducted on a sample population of stroke subjects (single arm).
Subjects will be tested with the hip exoskeleton and baseline.
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The intervention is an experimental robotic hip exoskeleton in a powered state providing assistance to the user that has been previously developed by the team.
It is used to improve walking gait performance.
The intervention will serve as a baseline where participants will be asked to perform the tasks without wearing a hip exoskeleton.
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¿Qué mide el estudio?
Medidas de resultado primarias
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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Temporal Convolutional Network (TCN) Model Performance (Joint Moment Accuracy)
Periodo de tiempo: 5 Days
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This outcome represents the error with which the deep learning model embedded into our hip exoskeleton's microprocessor predicts hip joint moments in stroke patients.
Specifically, the coefficient of determination (R²) is computed between the predicted hip joint moments and the ground truth measurements.
Ground truth measurements are obtained from a laboratory-grade force plate system and inverse dynamics calculations.
For these measures, higher R² values (closer to 1.0) indicate better correlation between predicted and actual hip joint moments.
This metric provides a comprehensive assessment of the exoskeleton's ability to accurately estimate hip joint moments in stroke patients during tasks, with improved outcomes representing better assistive capabilities for the user.
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5 Days
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Metabolic Cost for Level Ground Walking
Periodo de tiempo: 5 days
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Metabolic energy expenditure will be quantified using an indirect calorimetry system (Parvo Medics, UT) that measures oxygen consumption (VO₂) and carbon dioxide production (VCO₂) during experimental tasks.
Measurements will be collected from each participant during a 5-minute baseline standing period followed by level ground walking trials under three conditions: without the exoskeleton, with the exoskeleton in a powered state, and with the exoskeleton in an unpowered state.
Metabolic cost will be calculated from respiratory gas exchange data using standard equations for energy expenditure.
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5 days
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Biological Joint Work - Level Walking
Periodo de tiempo: 5 days
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Mechanical work performed by the lower limb joints during level walking will be quantified through biomechanical analysis of motion capture data.
Joint moments and angular velocities will be derived through inverse dynamics and kinematics, respectively.
Joint power, calculated as the product of joint moment and angular velocity, will be integrated with respect to time using trapezoidal integration to determine mechanical work.
Positive work will be calculated by integrating positive joint powers, providing comprehensive quantification of joint energy generation at each joint during level walking.
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5 days
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Biological Joint Work - Incline Walking
Periodo de tiempo: 5 days
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Mechanical work performed by the lower limb joints will be quantified during incline walking through biomechanical analysis of motion capture data.
Joint moments and angular velocities will be derived through inverse dynamics and kinematics, respectively.
Joint power, calculated as the product of joint moment and angular velocity, will be integrated with respect to time using trapezoidal integration to determine mechanical work.
Positive work will be calculated by integrating positive joint powers, providing comprehensive quantification of joint energy generation at each joint during the incline walking.
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5 days
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Biological Joint Work - Stair Ascent
Periodo de tiempo: 5 days
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Mechanical work performed by the lower limb joints will be quantified during stair ascent through biomechanical analysis of motion capture data.
Joint moments and angular velocities will be derived through inverse dynamics and kinematics, respectively.
Joint power, calculated as the product of joint moment and angular velocity, will be integrated with respect to time using trapezoidal integration to determine mechanical work.
Positive work will be calculated by integrating positive joint powers, providing comprehensive quantification of joint energy generation at each joint during the stair ascent task.
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5 days
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Biological Joint Work - Sit to Stand
Periodo de tiempo: 5 days
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Mechanical work performed by the lower limb joints will be quantified during sit to stand through biomechanical analysis of motion capture data.
Joint moments and angular velocities will be derived through inverse dynamics and kinematics, respectively.
Joint power, calculated as the product of joint moment and angular velocity, will be integrated with respect to time using trapezoidal integration to determine mechanical work.
Positive work will be calculated by integrating positive joint powers, providing comprehensive quantification of joint energy generation at each joint during the sit to stand task.
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5 days
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Biological Joint Work - go and Grab
Periodo de tiempo: 5 days
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Mechanical work performed by the lower limb joints will be quantified during a go and grab task through biomechanical analysis of motion capture data.
In the go and grab task, participants take several steps, lean forward, and pick up a weighted object from a low surface just above ground level.
Joint moments and angular velocities will be derived through inverse dynamics and kinematics, respectively.
Joint power, calculated as the product of joint moment and angular velocity, will be integrated with respect to time using trapezoidal integration to determine mechanical work.
Positive work will be calculated by integrating positive joint powers, providing comprehensive quantification of joint energy generation at each joint during the go and grab task.
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5 days
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Medidas de resultado secundarias
Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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10 Meter Walk Test (Self-selected)
Periodo de tiempo: 5 days
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This will be measured as the participant walks a distance of 10 meters across a gait mat at their self-selected (or comfortable) walking speed.
This measure will be recorded in seconds with lower values indicating faster speed and higher values indicating slower speeds.
Self-selected walking speed is highly correlated with functional ability and dependence.
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5 days
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The Timed up and go (TUG)
Periodo de tiempo: 5 days
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This will be measured as the time it takes a participant to rise from a chair, walk three meters at a self-selected pace, turn, walk back to the chair and sit down.
The total time taken will be measured in seconds with longer times indicating poorer physical performance.
This test assesses functional mobility and dynamic balance.
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5 days
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6 Minute Walk Test
Periodo de tiempo: 5 days
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This is a measurement of endurance and functional ability that assesses the participants ability to walk a distance over a time period of 6 minutes.
It is measured in distance with greater distances indicating improved levels of endurance and functional ability.
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5 days
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Modified Stroke Impact Scale
Periodo de tiempo: 5 days
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The Modified Stroke Impact Scale (SIS) is a self-report questionnaire that evaluates disability and health-related quality of life after stroke.
Each item is rated in a 5-point Likert scale in terms of the difficulty the patient has experienced in completing each item.
Scores are transformed to a 0-100 scale, with 0 indicating the poorest perceived health status and 100 indicating the best, across domains of disability and health-related quality of life.
Higher scores are indicative of improved quality of life.
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5 days
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Modified Activities-specific Balance Confidence
Periodo de tiempo: 5 days
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The modified activities specific balance confidence is a self-report measure of balance confidence in performing various activities without losing balance or experiencing a sense of unsteadiness.
Confidence is rated for various activities on a scale from 0% to 100% for each activity, with 0% indicative of no confidence and 100% indicative of complete confidence.
Scores reflect balance confidence with higher scores indicative of improved balance confidence.
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5 days
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Fast Self-selected Walking Speed
Periodo de tiempo: 5 days
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This will be measured as the participant walks on a treadmill at their fastest and safest walking speed.
This measure will be recorded in meters/seconds with higher values indicating faster speed and lower values indicating slower speeds.
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5 days
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Colaboradores e Investigadores
Patrocinador
Patrocinador
Colaboradores
Colaboradores
Investigadores
Investigadores
- Investigador principal: Aaron Young, Ph.D., Georgia Institute of Technology
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Inicio del estudio
Finalización primaria (Actual)
Finalización primaria
Finalización del estudio (Actual)
Finalización del estudio
Fechas de registro del estudio
Enviado por primera vez
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Publicado por primera vez
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización publicada
Última actualización enviada que cumplió con los criterios de control de calidad
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
Otros números de identificación del estudio
- H18182
- R03HD097740 (Subvención/contrato del NIH de EE. UU.)
- DP2HD111709 (Subvención/contrato del NIH de EE. UU.)
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Información sobre medicamentos y dispositivos, documentos del estudio
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