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NCT04338815 · ClinicalTrials.gov registry record · NA
Exoskeleton Variability Optimization
A NA study, sponsored by University of Nebraska.
- Terminated
- Registry status
- NA
- Development phase
- 9
- Enrollment target
NCT04338815: Clinical Trial NA study, sponsored by University of Nebraska.
NCT04338815 is a NA study that was terminated before completion, run by University of Nebraska. The registered enrollment target is 9 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (99% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT04338815, a NA study, was terminated before completion, sponsored by University of Nebraska.
- TERMINATED
- Registry status
- NA
- Development phase
- 9 participants
- Enrollment target
Study Summary
Exoskeletons, wearable devices that assist with walking, can improve mobility in clinical populations. With exoskeletons, it is crucial to optimize the assistance profile. Recent studies describe algorithms (i.e., human-in-the-loop) to optimize the assistance profile with real-time metabolic measurements. The needed duration of current human-in-the-loop (HITL) algorithms range from 20 minutes to 1 hour which is longer than the average duration that most patients with peripheral artery disease (PAD) can walk. Because of this limited walking duration, it is often not possible for patients with PAD to reach steady-state metabolic cost, which makes these measurements are not useful for optimizing exoskeletons. In this study, investigators intend to develop and evaluate HITL optimization methods for exoskeletons and use the information to design and evaluate a portable hip exoskeleton. Shorter and more clinically feasible HITL optimization strategies based on experiments in healthy adults might allow utilizing these optimization strategies to become available for patient populations such as patients with PAD.
Primary Outcome
Convergence is determined when the estimated optimal exoskeleton settings vary less than 10%. The time to convergence is measured.
Interventions
- OTHER Exoskeleton Optimization
- OTHER Endurance Evaluation
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 9 participants |
| Start Date | 2022-01-31 |
| Est. Completion | 2025-03-28 |
| Phase | NA |
Why NCT04338815 stopped before completion
NCT04338815 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 9 participants, a relatively small participant target, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (99% lower).
The record links to 0 conditions, and to 2 interventions - of which Exoskeleton Optimization is the first listed.
NCT04338815 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT04338815 about?
NCT04338815 is a clinical study titled "Exoskeleton Variability Optimization". Exoskeletons, wearable devices that assist with walking, can improve mobility in clinical populations. With exoskeletons, it is crucial to optimize the assistance profile. Recent studies describe algorithms (i.e., human-in-the-loop) to optimize the assistance profile with real-time metabolic measure...
What is the current status of trial NCT04338815?
This trial is currently terminated. It is a NA study. The enrollment target is 9 participants. The study started on 2022-01-31. Estimated completion is 2025-03-28.
What interventions are being tested in trial NCT04338815?
The interventions under investigation include: Exoskeleton Optimization (OTHER), Endurance Evaluation (OTHER).
Who is sponsoring clinical trial NCT04338815?
This trial is sponsored by University of Nebraska, which has 407 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT04338815's enrollment target sits among peer trials
9 1975th of 2000 higher than 25 of 2,000 other NA trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other NA trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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