Evaluating and Improving Assistive Robotic Devices Continuously and in Real-time

University of Michigan logo

University of Michigan

Status

Withdrawn

Conditions

Amputation

Treatments

Device: Powered ankle prosthesis

Study type

Interventional

Funder types

Other
NIH

Identifiers

NCT03632252
R03HD092639 (U.S. NIH Grant/Contract)
HUM00139671

Details and patient eligibility

About

The goal of this research is to determine a quick, accurate and unobtrusive way to optimize the performance of powered assistive devices like ankle exoskeleton or prostheses.

Full description

Lower limb assistive robotic devices, such as active prosthesis, orthoses, and exoskeletons have the potential to restore function for the millions of Americans who experience mobility challenges due to injury and disability. Since individuals with mobility challenges have an increased metabolic costs of transport, the benefit of such assistive devices is commonly assessed via the reduction in the metabolic work rate of the individual who is using the device. Currently, metabolic work rate can only be obtained in a laboratory environment, using breath-by-breath measurements of respiratory gas analysis. To obtain a single steady state data point of metabolic work rate, multiple minutes of data must be collected, since the signals are noisy and slow. In addition, the user has to wear a mask and bulky equipment. The investigators propose an improved way to obtain such estimates of metabolic work rate in real-time. In this project, the investigators will use various small sensors to optimize push-off timing for an active ankle prosthesis.

Sex

All

Ages

18+ years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

  • Has a unilateral amputation
  • Has used a prosthesis for at least 6 months

Exclusion criteria

  • History of orthopedic or neurologic disorders to their intact limb
  • History of cardiovascular disease
  • Unable to walk for 30 minutes at a time

Trial design

Primary purpose

Basic Science

Allocation

N/A

Interventional model

Single Group Assignment

Masking

None (Open label)

0 participants in 1 patient group

Powered ankle prosthesis
Experimental group
Description:
We will use data from various sensors to optimize the amount of power provided by custom ankle ankle prosthesis. This is a single session study lasting about 4 hours.
Treatment:
Device: Powered ankle prosthesis

Trial contacts and locations

1

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Data sourced from clinicaltrials.gov

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