Bio Leg: Advancing Mobility (BAM) (BAM)
Adaptive Mobility Technology: A Comparative Study of C-Leg and Bio Leg
Descripción general del estudio
Estado
Estado
Condiciones
Condiciones
Intervención / Tratamiento
Intervención / Tratamiento
Descripción detallada
Although microprocessor-controlled knees (MPK) such as the C-Leg have demonstrated clear benefits over non-microprocessor-controlled prosthetic knees, it remains unclear whether powered knee assistance provides additional advantages in movement quality, metabolic efficiency, and limb loading during walking adaptability tasks.
This study directly addresses this gap by comparing mobility using the Bio Leg to mobility with the C-Leg using outcome measures that reflect real-world mobility challenges.
By generating objective evidence on whether powered knee assistance improves biomechanics, efficiency, and stability beyond that achieved with an established MPK, this study will inform prosthetic prescription, rehabilitation strategies, and payer decision-making. Given the growing population of individuals living with transfemoral amputation, identifying technologies that support safe, efficient, and confident mobility has important implications for community participation, long-term musculoskeletal health, and quality of life.
This study uses a within-subject repeated-measures design in which each participant is assessed under two conditions: current prosthesis and the Bio Leg prosthesis. All primary and secondary outcomes will be analyzed as within-participant differences, with each participant serving as their own control.
Tipo de estudio
Tipo de estudio
Inscripción (Estimado)
Inscripción
Fase
Fase
- No aplica
Contactos y Ubicaciones
Estudio Contacto
Estudio Contacto
- Nombre: Emily J Fox, PT, DPT, MHS, PhD
- Número de teléfono: 904-742-2500
- Correo electrónico: ejfox@phhp.ufl.edu
Copia de seguridad de contactos de estudio
- Nombre: Joshua C Encarnacion, BS
- Número de teléfono: 904-345-8969
- Correo electrónico: Joshua.Encarnacion@brooksrehab.org
Ubicaciones de estudio
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Florida
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Jacksonville, Florida, Estados Unidos, 32216
- Reclutamiento
- Brooks Rehabilitation
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Criterios de participación
Criterio de elegibilidad
Criterio de elegibilidad
Edades elegibles para estudiar
- Adulto
- Adulto Mayor
Acepta Voluntarios Saludables
Descripción
Inclusion Criteria:
- Adults 40 to 70 years of age
- Unilateral transfemoral amputation > 1 year
- K3 or K4 ambulator (based on the K classification system) and able to walk with no greater assistances than a single point cane
- Current microprocessor-controlled prosthesis (C-leg) user with > 6 months experience and able to walk without a device of using a single point cane
- Able to give informed consent
Exclusion Criteria:
- Severe cardiovascular condition or other disease limiting study participation
- Skin lesions or wounds, acute or unstable fracture, diagnosis of osteoarthritis or bone impairments affecting safe participation in walking activities
- Residual limb dysfunction (i.e. joint contracture) limiting mobility or study participation
- Pain that limits walking of participation in walking activities
- Current participation in rehabilitation to address walking function
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Tratamiento
- Asignación: No aleatorizado
- Modelo Intervencionista: Asignación cruzada
- Enmascaramiento: Ninguno (etiqueta abierta)
Número de brazos
Armas e Intervenciones
Grupo de participantes/brazoGrupo de participantes/brazo |
Intervención / TratamientoIntervención / Tratamiento |
|---|---|
|
Sin intervención: C-Leg
The first assessment will involve testing the participant with their current C-leg microprocessor prosthesis.
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Experimental: Bio Leg
After the Bio Leg fitting, the participant will exclusively wear the Bio Leg knee component for an acclimation period that will be a minimum of 4 weeks and up to 6 depending on participant's schedule and comfort/ease of using the device.
Each participant will complete a minimum of 2 and up to 4 physical therapy sessions during the acclimation period.
These physical therapy sessions will involve standard physical therapy training for use of a prosthetic limb after amputation.
Following the acclimation period, the participant will complete the second assessment, which will mirror the first assessment.
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After completing biomechanics and clinical testing at Pre Assessment with their C-Leg, participants will be fitted with a Bio-Leg prosthesis at the prosthetist clinic.
The participant will train and use the Bio-Leg prosthesis during a 4-6 week acclimation period.
The participant will then complete the same biomechanics and clinical testing at Post Assessment.
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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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Change in 6-Minute Walk Test (6MWT)
Periodo de tiempo: Baseline, 4-6 weeks
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The distance that a patient should walk based on their height, weight, age, and gender.
Performance assessment of walking endurance for 6 minutes.
An increase in the number of meters walked during this assessment reflects an improvement in walking endurance.
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Baseline, 4-6 weeks
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Change in Interlimb Symmetry (Ground Reaction Forces)
Periodo de tiempo: Baseline, 4-6 weeks
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A direct measure of vertical ground reaction forces during the rising phase of a sit-to-stand task (measured in Newtons) using standard force plates embedded in the floor.
Increased symmetry in ground reaction forces between the lower limbs reflects improved equalization of weight distribution between the limbs.
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Baseline, 4-6 weeks
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Change in Metabolic Efficiency (O2/kg/m)
Periodo de tiempo: Baseline, 4-6 weeks
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A direct measure assessed during the six-minute walk test.
Metabolic efficiency is determined by the energy cost of transport, defined as oxygen consumption per unit body weight and distance walked (O₂/kg/m), which accounts for the individual's weight and walking speed.
Improved metabolic efficiency reflects enhanced oxygen delivery and utilization during walking.
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Baseline, 4-6 weeks
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Colaboradores e Investigadores
Patrocinador
Patrocinador
Colaboradores
Colaboradores
Investigadores
Investigadores
- Investigador principal: Emily J Fox, PT, DPT, MHS, PhD, University of Florida & Brooks Rehabilitation
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Inicio del estudio
Finalización primaria (Estimado)
Finalización primaria
Finalización del estudio (Estimado)
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
Otros números de identificación del estudio
Otros números de identificación del estudio
- IRB202600203
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
producto fabricado y exportado desde los EE. UU.
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