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CompletedNCT06150430Updated Jan 29, 2025

An Active Pelvis Orthosis (APO) for Post-stroke Gait Rehabilitation: a Pilot Study

An interventional study of APO in Stroke, sponsored by IUVO S.r.l.. Completed at 1 site in Italy. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-01-29.

Sponsored by IUVO S.r.l. · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Registered 7 months after the study started (first participant enrolled Mar 2023, registered Nov 2023).
Phase
Not applicable
Study type
Interventional
Enrollment
20
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

The primary objective of this study is to evaluate the safety, reliability and short-term effectiveness of APO-based training to increase the self-selected walking velocity (SSV) of stroke patients. The robotic device is the Active Pelvic Orthosis RT v3.1 (IUVO APO) developed bu IUVO S.r.l.

Read the detailed description

The primary objective of this study is to evaluate the safety, reliability and short-term effectiveness of APO-based training to increase the self-selected walking velocity (SSV) of stroke patients. The endpoint to evaluate the APO-based training effectiveness will be the difference in self-selected walking velocity (m/s) comparing post-training session (T4) to baseline sessions (T1\&T2).

Other objective of the study, both secondary and exploratory, have been defined to further investigate the effects of the IUVO APO on post-stroke subjects.

The Investigational Device, Active Pelvis Orthosis RT v3.1 (APO), is a bilateral powered robotic hip orthosis (or exoskeleton) designed to gently assist hip flexion-extension movements by providing smooth assistive torque at the hip level, automatically adapting to natural gait variations.

The study will be an interventional single-arm clinical trial with no control group and will involve up to 20 subjects, that fulfil the inclusion/exclusion criteria. This should be sufficient to provide the input needed to reach the primary and secondary objectives of the trial.

In the protocol, after the screening visit, subjects will take part in 14 experimental sessions: two baseline sessions (T1-T2), three familiarization sessions (F1-F3), six training sessions (E1-E6), two assessment sessions (one pre-training T3 and one post training T4) and one 2-month follow-up session (T5). Depending on the session, the subject will be asked to walk with or without the APO, or both. During the assessment sessions, the subject will be evaluated through different standard tests (such as 10MWTs and 2mWTs) and instrumented gait analysis, with and without APO. In the training sessions, the subject will perform some overground walking practice with APO.

02

Conditions studied

  • Stroke

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Keywords

  • Hip exoskeleton
  • Cerebrovascular Disorders
  • Nervous System Diseases
03

In context

Stroke

7,286 studies on the registry are indexed under Stroke; 2,013 are open to participants now.

This study's enrollment of 20 is below the median of 50 across 5,366 interventional studies indexed under Stroke.

Browse Stroke studies →

Lead sponsor

This is the only study on the registry with IUVO S.r.l. as lead sponsor.

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

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • cerebral stroke;
  • at least 3 months from cerebral event;
  • hemiparesis;
  • age > 18 years;
  • SSV greater than 0.3 (m/s);
  • SSV less than 0.8 (m/s);
  • ability to ambulate with no more than minimal contact assistance;
  • maximum hip width range, i.e., distance between Great Trochanters = 430 mm.

Exclusion criteria

Exclusion Criteria:

  • Modified Ashworth Scale >3 at the hip and/or ankle joints;
  • inability to follow verbal 3 step commands;
  • severe aphasia causing inability to communicate with the investigators;
  • serious medical conditions (recent myocardial infarction in less than 3 months, uncontrolled congestive heart failure (CHF), uncontrolled hypertension, uncontrolled seizures);
  • leg deep vein thrombosis less than 6 weeks ago;
  • other pre-existing neurological disorders (Parkinson's disease, Amyotrophic Lateral Sclerosis, Multiple Sclerosis, Dementia);
  • Severe osteoporosis;
  • severe hip / knee osteoarthritis with limitation of movement or significant pain;
  • use of a colostomy bag;
  • skin wounds, infection or problems at device contact locations;
  • major orthopedic surgery or fractures within the last 90 days (hip, knee, ankle, foot, spine);
  • cardiac surgery within the last 3 months;
  • patient has recently or is currently participating in research that may influence, in PI's opinion, responses to study intervention;
  • pregnancy;
  • breastfeeding woman;
  • implanted cardiac devices (pacemakers, ICDs);
  • use of assistive device that, in the PI's opinion, could interfere with APO;
  • it is recommended that participants treated with anti-spasticity agents (oral, injectable or intrathecal) keep the dosage for these medications constant throughout the study;
  • where medically appropriate, all other concomitant medications being taken by a participant at entry into the study should continue at the same dose until end of study.
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
20 participants (actual)

Study arms

  • Experimental
    Training with APO

    All participants are assigned to the training group with the APO

    Device: APO

Interventions

  • DeviceAPO

    Subjects will take part in 14 experimental sessions: two baseline sessions (T1-T2), three familiarization sessions (F1-F3), six training sessions (E1-E6), two assessment sessions (one pre-training T3 and one post training T4) and one 2-month follow-up session (T5). Depending on the session, the subject will walk with and/or without the APO. During the assessment sessions (T3-T4), the subject will be evaluated through different standard tests (such as 10MWTs and 2mWTs) and instrumented gait analysis, with and without the APO. The goal of each training session (E1-E6) will be to achieve a minimum of 30 minutes of overground walking assisted by the APO, leaving up to 15 minutes to rest if needed. Training sessions will occur 2-3 times a week for 2-3 weeks to complete the training protocol.

06

What researchers measure

Primary outcomes

  1. Incidence of Adverse Device Events (ADEs) and Serious Adverse Device Events (SADEs)

    Safety of the device will be assessed by the number of ADEs and SADEs throughout the duration of the study

    Time frame: Duration of the study participation (estimated 4 weeks, excluding follow-up)

  2. Incidence of Adverse Device Events (ADEs), Serious Adverse Device Events (SADEs) and Device Deficiencies (DDs)

    Reliability of the device will be assessed by the number of ADEs, SADEs and DDs throughout the duration of the study

    Time frame: Duration of the study participation (estimated 4 weeks, excluding follow-up)

  3. 10-Meter Walk Test (10MWT) at Self-Selected walking Velocity (SSV)

    Change in SSV measured without the device

    Time frame: Baseline, Post-Training (estimated 3-4 weeks)

Secondary outcomes

  1. 10-Meter Walk Test (10MWT) at Fast walking Velocity (FV)

    Change in FV measured without the device

    Time frame: Baseline, Post-Training (estimated 3-4 weeks)

  2. 10-Meter Walk Test (10MWT) at Self-Selected walking Velocity (SSV)

    Change in SSV measured without the device

    Time frame: Post-Training (estimated 3-4 weeks), Follow-up (2 months follow up)

  3. 10-Meter Walk Test (10MWT) at Fast walking Velocity (FV)

    Change in FV measured without the device

    Time frame: Post-Training (estimated 3-4 weeks), Follow-up (2 months follow up)

  4. 2-minute Walk Test (2mWT)

    Change in walking endurance measured without the device

    Time frame: Baseline, Post-Training (estimated 3-4 weeks)

  5. 2-minute Walk Test (2mWT)

    Change in walking endurance measured without the device

    Time frame: Post-Training (estimated 3-4 weeks), Follow-up (2 months follow up)

07

Study locations

1 site
  • Ente Ospedaliero Valduce - UOC di Medicina Riabilitativa Villa Beretta
    Lecco, 23845, Italy
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 Jan 29, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06150430
Lead sponsor
IUVO S.r.l.
Collaborators
Össur Iceland ehf, Scuola Superiore Sant'Anna di Pisa
Responsible party
Sponsor
First posted
Nov 29, 2023
Start date
Mar 30, 2023
Primary completion
Oct 31, 2024
Completion
Oct 31, 2024
Last update
Jan 29, 2025

Study contacts

Franco Molteni, MD
principal investigator · Ente Ospedaliero Valduce - UOC di Medicina Riabilitativa Villa Beretta

Oversight

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

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This study is completed, as verified in Jan 2025. You cannot join it, but the record below documents what was studied.

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