20 Participants Needed

Hybrid Prosthetic Leg for Amputation

SF
LH
Overseen ByLevi Hargrove, PhD
Age: 18+
Sex: Any
Trial Phase: Academic
Sponsor: Shirley Ryan AbilityLab
No Placebo GroupAll trial participants will receive the active study treatment (no placebo)
Approved in 1 JurisdictionThis treatment is already approved in other countries

What You Need to Know Before You Apply

What is the purpose of this trial?

This trial tests a new type of prosthetic leg called the Hybrid Leg. The goal is to determine if this lightweight, powered leg can enhance the lives of people with lower limb amputations by evaluating its use in both lab settings and daily life. Participants will either try the Hybrid Leg or continue using their current prosthetic leg. Ideal candidates for the trial are those who have had one or both legs amputated and are already using a prosthesis for mobility. As an unphased trial, this study offers participants the chance to contribute to innovative research that could improve mobility solutions for amputees.

Will I have to stop taking my current medications?

The trial information does not specify whether you need to stop taking your current medications.

What prior data suggests that the Hybrid Prosthetic Leg is safe?

Research has shown that robotic prostheses, such as the Hybrid Leg, help people walk faster and with less effort. These devices are generally safe, especially when tested and used in controlled settings. Users of these prosthetic legs have a lower chance of falling compared to some other types of prosthetic knees. As a result, the Hybrid Leg is well-accepted and may offer a safer experience for users.12345

Why are researchers excited about this trial's treatments?

Researchers are excited about the Hybrid Leg because it combines advanced technology to improve mobility for amputees. Unlike traditional passive prosthetic legs, which rely on the user's own motion to function, the Hybrid Leg integrates active components that can provide powered assistance and more natural movement. This innovative approach could lead to better balance, increased walking speed, and reduced fatigue for users, making daily activities easier and more comfortable.

What evidence suggests that this trial's prosthetic legs could be effective for amputation?

Research has shown that robotic prostheses like the Hybrid Leg, which participants in this trial may receive, help people walk faster and use less energy. Studies also indicate that these devices lower the risk of falling. The Hybrid Leg employs advanced controls to make walking smoother and more natural. Recent improvements in smart prosthetic limbs allow them to adjust to different walking speeds and needs. This technology aims to make walking more efficient and safe for users. Meanwhile, another group in this trial will use their currently prescribed passive prosthesis, serving as a comparison to evaluate the benefits of the Hybrid Leg.13678

Who Is on the Research Team?

Levi Hargrove, PhD

Levi Hargrove, PhD

Principal Investigator

Shirley Ryan AbilityLab

Are You a Good Fit for This Trial?

This trial is for individuals with a single or double lower limb amputation who currently use a prosthesis and can walk at various speeds (K2/K3/K4 level). Participants must speak English to understand the study and give feedback. Those with cognitive impairments, other serious health issues, or new injuries that prevent prosthesis use cannot join.

Inclusion Criteria

I have had one or both of my legs amputated.
English speaking
I can walk with a prosthesis.

Exclusion Criteria

I understand and can follow the study's requirements.
Significant other comorbidity: Any other medical issues or injuries that would preclude completion of the study, use of the prostheses, or that would otherwise prevent acquisition of useable data by researchers.
I can wear a prosthesis and do daily tasks without major new injuries.

Timeline for a Trial Participant

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

In-lab Therapy

Participants are fit with the Hybrid Leg and receive in-lab therapy to learn how to ambulate with the device

Duration not specified
Multiple in-lab visits

Ambulation and Community Mobility Training

Subjects complete extensive ambulation and community mobility training to learn optimal use of their own passive device or the Hybrid Leg

Duration not specified
Multiple in-lab visits

Home Trial

Subjects complete 4-week trials using their assigned prosthesis (Condition A or B) at home and within their community

4 weeks
Home-based monitoring

Follow-up

Participants are monitored for safety and effectiveness after treatment

4 weeks

What Are the Treatments Tested in This Trial?

Interventions

  • Hybrid Leg
  • Prescribed Passive Prosthesis
Trial Overview The study tests an advanced powered prosthetic leg called 'Hybrid Leg' against the standard passive prosthesis prescribed to patients. The Hybrid Leg uses a special system designed to recognize the user's movement intentions in both lab settings and everyday life scenarios.
How Is the Trial Designed?
2Treatment groups
Experimental Treatment
Group I: Condition B: Passive LegExperimental Treatment1 Intervention
Group II: Condition A: Hybrid LegExperimental Treatment1 Intervention

Find a Clinic Near You

Who Is Running the Clinical Trial?

Shirley Ryan AbilityLab

Lead Sponsor

Trials
212
Recruited
17,900+

Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

Collaborator

Trials
2,103
Recruited
2,760,000+

Published Research Related to This Trial

The new robotic leg prosthesis effectively mimics the biomechanics of a biological leg while matching the weight, size, and battery life of traditional prostheses, making it more practical for daily use.
Preclinical tests with three individuals showed that this prosthesis allows for natural walking movements and includes a passive mode for unlimited walking on level ground without needing to recharge, which is a significant advancement over existing powered prosthetics.
A lightweight robotic leg prosthesis replicating the biomechanics of the knee, ankle, and toe joint.Tran, M., Gabert, L., Hood, S., et al.[2023]
The experimental adaptive controlled knee prosthesis significantly improved walking performance in amputees compared to a normal prosthesis, showing a 50% increase in hip moment peaks and a 37% reduction in hip muscular effort.
Additionally, the adaptive knee reduced the need for compensatory movements and enhanced walking symmetry, indicating its potential for better functional outcomes in amputees.
Evaluation of AK prostheses comparing conventional with adaptive knee control devices.Ishai, G., Bar, A.[2019]
In a pilot study involving two participants with Syme amputation, crossover prosthetic feet demonstrated increased ankle range of motion and energy return compared to traditional energy-storing feet, suggesting a more natural gait pattern.
Both participants preferred the crossover feet, indicating potential benefits in user satisfaction, although changes in patient-reported outcomes were not statistically significant.
Effects of high-profile crossover feet on gait biomechanics in 2 individuals with Syme amputation.Slater, C., Hafner, BJ., Morgan, SJ.[2023]

Citations

Hybrid Prosthetic Leg for AmputationThis trial is for individuals with a single or double lower limb amputation who currently use a prosthesis and can walk at various speeds (K2/K3/K4 level).
Virtual Constraint Control of a Powered Prosthetic LegThis paper employs the method of virtual constraints on a powered prosthetic leg to unify the stance period, coordinate ankle and knee control, and accommodate ...
Recent progress on smart lower prosthetic limbsThis review paper explores recent advancements in the integration of EEG and fNIRS modalities for smart lower prosthetic limbs for rehabilitation applications.
Design and clinical implementation of an open-source ...In individuals with lower-limb amputations, robotic prostheses can increase walking speed, and reduce energy use, the incidence of falls and ...
A cost-effective prosthetic leg: Design and developmentThis research aims to address this issue by developing a fully mechanical trans-femoral prosthetic leg that is accessible to low-income people.
A Review of Current State-of-the-Art Control Methods for ...In this paper, we present a review of existing control strategies for lower-limb powered prostheses, including the control objectives, sensing capabilities, ...
Degree of Safety Against Falls Provided by 4 Different ...Fluid-controlled prosthetic knees expose inpatients with transfemoral amputation to higher incidence of falling than MPK during rehabilitation training.
Recent progress on smart lower prosthetic limbsThis review paper explores recent advancements in the integration of EEG and fNIRS modalities for smart lower prosthetic limbs for rehabilitation applications.
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