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

NCT ID: NCT06150430

Last Updated: 2025-01-29

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 20 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2023-03-30
• Study Completion Date: 2024-10-31

Brief 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.

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.

Conditions

Stroke

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

Training with APO

All participants are assigned to the training group with the APO

Group Type: EXPERIMENTAL

APO

Intervention Type: DEVICE

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.

Interventions

APO

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.

Intervention Type: DEVICE

Eligibility Criteria

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

• 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.

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Össur Iceland ehf

INDUSTRY

Sponsor Role: collaborator

Scuola Superiore Sant'Anna di Pisa

OTHER

Sponsor Role: collaborator

IUVO S.r.l.

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Franco Molteni, MD

Role: PRINCIPAL_INVESTIGATOR

Ente Ospedaliero Valduce - UOC di Medicina Riabilitativa Villa Beretta

Locations

Ente Ospedaliero Valduce - UOC di Medicina Riabilitativa Villa Beretta

Lecco, , Italy

Countries

Italy

Other Identifiers

Ortesi_Pelvica_Attiva_02

Identifier Type: -

Identifier Source: org_study_id