CClinicalTrials.gg
WithdrawnNCT04157608Updated Oct 10, 2023

Energy-Harvesting Mesofluidic Impulse Prosthesis: e-MIP

An interventional study of Habitual Prosthesis and Energy-Harvesting Mesofluidic Impulse Prosthesis in Transtibial Amputation and Artificial Limbs, sponsored by Orthocare Innovations, LLC. Withdrawn at 1 site in United States. Open to participants aged 21 Years to 75 Years. Per ClinicalTrials.gov, last updated 2023-10-10.

Sponsored by Orthocare Innovations, LLC · Not applicable, Interventional, and Device feasibility

Why this study was withdrawn
Investigational device under development
Phase
Not applicable
Study type
Interventional
Enrollment
0
Allocation
Non-randomized
Ages
21 Years to 75 Years
Sex
All
01

Study summary

The purpose of this research is to validate the e-MIP design and function by testing the ability of e-MIP to harvest energy and return a sufficient amount of energy to assist the user during gait. The investigators will also evaluate whether prosthetic users are able to wear and use the e-MIP device long-term.

02

Conditions studied

  • Transtibial Amputation
  • Artificial Limbs
03

In context

Lead sponsor

Orthocare Innovations, LLC is the lead sponsor of 7 studies on the registry; 3 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
21 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Unilateral transtibial amputation
  • At least twelve months post-amputation
  • Currently walking on a prosthesis for at least one year
  • Uses modular endoskeletal prosthetic components
  • Has bilateral normal range of motion
  • Ability to walk independently and for an extended length of time (walking ability of each individual will be assessed by the principal investigator or study prosthetist during the recruitment period)
  • Ability to communicate individual perceptions
  • Ability to provide informed consent

Exclusion criteria

Exclusion Criteria:

  • Confounding injury or musculoskeletal problem
  • Pregnancy
  • Lower limb peripheral neuropathy
  • Symptomatic cardiovascular disease or chronic obstructive pulmonary disease
  • Not able to read and understand English
05

Study design

Phase
Not applicable
Primary purpose
Device feasibility
Allocation
Non-randomized
Intervention model
Crossover assignment
Masking
None (open label)
Enrollment
0 participants (actual)

Study arms

  • Active comparator
    Habitual Prosthesis

    Participant's existing baseline prescribed prosthesis

    Device: Habitual Prosthesis

  • Experimental
    e-MIP

    Experimental ankle-foot prosthesis

    Device: Energy-Harvesting Mesofluidic Impulse Prosthesis

Interventions

  • DeviceHabitual Prosthesis

    Habitual baseline prosthesis prescribed by participant's clinician.

  • DeviceEnergy-Harvesting Mesofluidic Impulse Prosthesis

    e-MIP is an experimental lower limb ankle-foot prosthesis.

06

What researchers measure

Primary outcomes

  1. Energy returned

    The amount of energy returned at the ankle joint, calculated from ankle torque and angle sensors with respect to time.

    Time frame: After four weeks with Habitual Prosthesis

  2. Energy returned

    The amount of energy returned at the ankle joint, calculated from ankle torque and angle sensors with respect to time.

    Time frame: After four weeks with e-MIP (system ON and system OFF)

Secondary outcomes

  1. Total Steps

    The number of steps taken by the participant will be recorded over four weeks with a step activity monitor.

    Time frame: After four weeks with Habitual Prosthesis

  2. Total Steps

    The number of steps taken by the participant will be recorded over four weeks with a step activity monitor.

    Time frame: After four weeks with e-MIP (system ON and system OFF)

  3. Step Rate

    The speed of steps taken by the participant will be recorded over four weeks with a step activity monitor.

    Time frame: After four weeks with Habitual Prosthesis

  4. Step Rate

    The speed of steps taken by the participant will be recorded over four weeks with a step activity monitor.

    Time frame: After four weeks with e-MIP (system ON and system OFF)

  5. Step Activity

    The number of continuous steps taken by the participant will be recorded over four weeks with a step activity monitor.

    Time frame: After four weeks with Habitual Prosthesis

  6. Step Activity

    The number of continuous steps taken by the participant will be recorded over four weeks with a step activity monitor.

    Time frame: After four weeks with e-MIP (system ON and system OFF)

  7. Prosthesis Evaluation Questionnaire

    Responses to the psychometrically validated scales of the Prosthesis Evaluation Questionnaire for persons with limb loss, in order to understand the participant's perception of the prosthesis. Questionnaire scores range from 0 to 100. Higher scores indicate a better outcome.

    Time frame: After four weeks with Habitual Prosthesis

  8. Prosthesis Evaluation Questionnaire

    Responses to the psychometrically validated scales of the Prosthesis Evaluation Questionnaire for persons with limb loss, in order to understand the participant's perception of the prosthesis. Questionnaire scores range from 0 to 100. Higher scores indicate a better outcome.

    Time frame: After four weeks with e-MIP (system ON and system OFF)

  9. Spatio-Temporal Gait Parameters

    The spatio-temporal parameters of gait, such as walking speed, will be measured using motion analysis.

    Time frame: After four weeks with Habitual Prosthesis

  10. Spatio-Temporal Gait Parameters

    The spatio-temporal parameters of gait, such as walking speed, will be measured using motion analysis.

    Time frame: After four weeks with e-MIP (system ON and system OFF)

  11. Kinematics during Gait

    Kinematics such as hip, knee, and ankle joint angles will be measured using motion analysis.

    Time frame: After four weeks with Habitual Prosthesis

  12. Kinematics during Gait

    Kinematics such as hip, knee, and ankle joint angles will be measured using motion analysis.

    Time frame: After four weeks with e-MIP (system ON and system OFF)

  13. Kinetics during Gait

    Kinetics such as hip, knee, and ankle joint torques will be measured using motion analysis.

    Time frame: After four weeks with Habitual Prosthesis

  14. Kinetics during Gait

    Kinetics such as hip, knee, and ankle joint torques will be measured using motion analysis.

    Time frame: After four weeks with e-MIP (system ON and system OFF)

07

Study locations

1 site
  • Orthocare Innovations, LLC
    Edmonds, Washington 98020, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 10, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04157608
Lead sponsor
Orthocare Innovations, LLC
Collaborators
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
Responsible party
Sponsor
First posted
Nov 8, 2019
Start date
Oct 2, 2019
Primary completion
Jul 10, 2022
Completion
Jul 10, 2022
Last update
Oct 10, 2023

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

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This study is withdrawn, as verified in Oct 2023. You cannot join it, but the record below documents what was studied.

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