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Investigation of Motorized Lower-limb Prostheses

7 mei 2026 bijgewerkt door: Northern Arizona University

The goal of this clinical trial is to learn if a motorized prosthesis can improve mobility in individuals with amputation. The main question it aims to answer is:

  • Does motorized prosthesis improve ambulation speed, balance, control, or efficiency when performing everyday activities?
  • What problems arise when using a motorized prosthesis? Researchers will compare mobility of the participants when using and not using the motorized prosthesis to see if mobility and/or function improves.

Participants will perform various activities with and without the motorized prosthesis including:

  • Walking at a mild incline/decline (0°-15°) on treadmill or over-ground
  • Ascending or descending stairs
  • Stand to sit and sit to stand transitions
  • All terrain walking over ground
  • Turning
  • Any combination of the above-mentioned activities

Studie Overzicht

Toestand

Nog niet aan het werven

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

Participants will perform ambulation activities (see list below) while using their prescribed prosthesis or the motorized prosthesis in conjunction with their prescribed passive prosthesis. Each ambulation activity will be tested in four different conditions:

  1. Ambulation with their personal (take home) device. This condition acts as a baseline to which the ambulation with the motorized prosthesis can be compared.
  2. Ambulation with the motorized prosthesis in the "off" configuration (i.e., no power is applied to the motor). This condition demonstrates the impact of the device when it is unpowered.
  3. Ambulation with the motorized prosthesis in the "transparent" configuration (i.e., minimal power is applied to the motor, such that the device behaves as a free hinge). This condition demonstrates the impact of the device when it behaves as a free hinge, similar to the participants personal device.
  4. Ambulation with the motorized prosthesis in the "powered" configuration (i.e., substantial electrical power is applied to the motor to replicate the function of the biological joint). This condition assesses the impact of the motorized prosthesis to improve ambulation of the participant.

Trials will take place over-ground and/or on a treadmill. Participants will walk for up to 40 minutes. Frequent breaks will be provided between trials and conditions to avoid fatigue and a maximum of 15 minutes of continuous walking will take place between breaks. When deemed necessary by the research staff or participant, crutches, canes, walkers, an overhead support system, or other ambulation or safety aid will be used to minimize the risk of a severe fall.

List of ambulation activities

  1. Walking at a mild incline/decline (0°-15°) on treadmill or over-ground
  2. Ascending or descending stairs
  3. Stand to sit and sit to stand transitions
  4. All terrain walking over ground
  5. Turning
  6. Any combination of the above-mentioned activities

The above conditions will be assessed using motion capture techniques in the laboratory environment which will include measures of metabolic energy consumption and muscle activity.

All terrain walking over ground will take place on campus and include Engineering, Business, and Learning resource Center buildings, the north and south quads, and campus walkways and urban trails. During all terrain walking, the participant will be attended by research personnel that will monitor subject safety.

Studietype

Ingrijpend

Inschrijving (Geschat)

20

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Locaties

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Ja

Beschrijving

Inclusion Criteria:

  • Individuals age 18 to 85 with or without lower-limb amputation
  • Able to understand and follow simple directions in English based on ability to provide verbal consent
  • Able to walk at least 30 feet with or without a walking aid
  • Able to safely fit into a device configuration and tolerate assistance
  • Individuals with lower-limb amputation must receive physician approval to participate in the study.

Exclusion Criteria:

  • Any neurological, musculoskeletal (other than lower-limb amputation) or cardiorespiratory injury, health condition (including pregnancy), or diagnosis that would affect the ability to walk as directed for short periods of time.
  • Participant or caregiver report that the perspective participant's physician has recommended that they not engage in moderate intensity walking exercise.
  • Subject mass greater than the engineered limit of the device (90 kg or 198 lbs) Note: No exclusions will be made on the basis of race, gender or ethnic background.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: NVT
  • Interventioneel model: Opdracht voor een enkele groep
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Experimental Group

Trials will take place over-ground and/or on a treadmill. Participants will ambulate for up to 40 minutes. Frequent breaks will be provided between trials and conditions to avoid fatigue and a maximum of 15 minutes of continuous ambulation will take place between breaks. When deemed necessary by the research staff or participant, crutches, canes, walkers, an overhead support system, or other ambulation or safety aid will be used to minimize the risk of a severe fall.

List of ambulation activities will include no more than

  1. Walking at a mild incline/decline (0°-15°) on treadmill or over-ground
  2. Ascending or descending stairs
  3. Stand to sit and sit to stand transitions
  4. All terrain walking over ground
  5. Turning
  6. Any combination of the above-mentioned activities

The above activities will be performed with the passive prosthesis and the motorized prosthesis in the "off", "transparent", and "powered" configurations.
Apparaat: Passive prosthesis
The participant will perform the study protocol with their "take home" prosthesis and/or another suitable passive prosthesis.
Andere namen:
  • controle
  • basislijn
  • take home prosthesis
Apparaat: Motorized prosthesis
The motorized prosthesis is an experimental device. The device is constructed from plastic and metal. It has motors, sensors, and electronic systems to control the prosthesis to mimic the behavior of a biological joint. The device is determined non-significant risk by the sponsor's Institutional Review Board.
Andere namen:
  • powered prosthesis

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Joint position
Tijdsspanne: Assessment will be taken on Day 1 (Intervention 1), Day 2 (Intervention 2 - condition 1), Day 3 (Intervention 2 - condition 2), and Day 4 (Intervention 2 - condition 3)
Motion capture measurements will be taken to calculate joint position (degrees) of the ankle, knee, hip, and torso. Participant measurements will be averaged per condition to generate a participant average. Participant averages will be pooled to determine an average per condition.
Assessment will be taken on Day 1 (Intervention 1), Day 2 (Intervention 2 - condition 1), Day 3 (Intervention 2 - condition 2), and Day 4 (Intervention 2 - condition 3)
Joint Velocity
Tijdsspanne: Assessment will be taken on Day 1 (Intervention 1), Day 2 (Intervention 2 - condition 1), Day 3 (Intervention 2 - condition 2), and Day 4 (Intervention 2 - condition 3)
Motion capture will be used to record joint velocity (deg/s) of the ankle, knee, hip, and torso. Participant measurements will be averaged per condition to generate a participant average. Participant averages will be pooled to determine an average per condition.
Assessment will be taken on Day 1 (Intervention 1), Day 2 (Intervention 2 - condition 1), Day 3 (Intervention 2 - condition 2), and Day 4 (Intervention 2 - condition 3)
Ground reaction force
Tijdsspanne: Assessment will be taken on Day 1 (Intervention 1), Day 2 (Intervention 2 - condition 1), Day 3 (Intervention 2 - condition 2), and Day 4 (Intervention 2 - condition 3)
The force a participant exerts on the ground (Newtons) will be measured using a force plate. Participant measurements will be averaged per condition to generate a participant average. Participant averages will be pooled to determine an average per condition.
Assessment will be taken on Day 1 (Intervention 1), Day 2 (Intervention 2 - condition 1), Day 3 (Intervention 2 - condition 2), and Day 4 (Intervention 2 - condition 3)
Muscle Electric Potential
Tijdsspanne: Assessment will be taken on Day 1 (Intervention 1), Day 2 (Intervention 2 - condition 1), Day 3 (Intervention 2 - condition 2), and Day 4 (Intervention 2 - condition 3)
Muscle electric potential will be measured using skin mounted electrodes (surface electromyography) and reported in volts. Participant measurements will be averaged per condition to generate a participant average. Participant averages will be pooled to determine an average per condition.
Assessment will be taken on Day 1 (Intervention 1), Day 2 (Intervention 2 - condition 1), Day 3 (Intervention 2 - condition 2), and Day 4 (Intervention 2 - condition 3)
Gas uptake and exchange
Tijdsspanne: Assessment will be taken on Day 1 (Intervention 1), Day 2 (Intervention 2 - condition 1), Day 3 (Intervention 2 - condition 2), and Day 4 (Intervention 2 - condition 3)
Oxygen consumption and CO2 production will be measured in L/s. Participant measurements will be averaged per condition to generate a participant average. Participant averages will be pooled to determine an average per condition.
Assessment will be taken on Day 1 (Intervention 1), Day 2 (Intervention 2 - condition 1), Day 3 (Intervention 2 - condition 2), and Day 4 (Intervention 2 - condition 3)

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
User Perception
Tijdsspanne: Assessment will be taken on Day 1 (Intervention 1), Day 2 (Intervention 2 - condition 1), Day 3 (Intervention 2 - condition 2), and Day 4 (Intervention 2 - condition 3)
User perception of the device will be assessed using NASA TLX survey. Participants will assess the device on a scale of 1-10 based on a questionnaire. Participant measurements will be averaged per condition to generate a participant average. Participant averages will be pooled to determine an average per condition.
Assessment will be taken on Day 1 (Intervention 1), Day 2 (Intervention 2 - condition 1), Day 3 (Intervention 2 - condition 2), and Day 4 (Intervention 2 - condition 3)

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Northern Arizona University

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Geschat)

16 april 2026

Primaire voltooiing (Geschat)

15 maart 2029

Studie voltooiing (Geschat)

15 maart 2029

Studieregistratiedata

Eerst ingediend

4 maart 2026

Eerst ingediend dat voldeed aan de QC-criteria

7 mei 2026

Eerst geplaatst (Werkelijk)

13 mei 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

13 mei 2026

Laatste update ingediend die voldeed aan QC-criteria

7 mei 2026

Laatst geverifieerd

1 mei 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • 2403974-1

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

ONBESLIST

Beschrijving IPD-plan

Uncertain if will publish in ICMJE journal

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Ja

product vervaardigd in en geëxporteerd uit de V.S.

Nee

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