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Modulating Locomotor-Respiratory Coupling Through Adaptive Exoskeleton Assistance in Patients With COPD

8 juli 2026 uppdaterad av: Farahnaz Fallahtafti, University of Nebraska
1) Purpose: To improve pulmonary rehabilitation outcomes for individuals with COPD by evaluating the effectiveness of a hip-assisted exoskeleton during a single pulmonary rehabilitation session. 2) Eligibility criteria: Participants must be between 45-75 years old, any gender, but must have a BMI of less than 35 kg/m^2, free from co-morbidities that may affect walking patterns, and must have moderate to severe COPD with no other pulmonary or cardiac issues. (Eligible participants will undergo a screening process which includes 6-minute walking test, medical history exam, and spirometry evaluation.) 3) Intervention and evaluation: The experimental collection will be conducted at the Biomechanics Research Building at the University of Nebraska at Omaha. Participants are required to participate in two sessions on two separate days, both including a 30-minute walking session with one session wearing the hip exoskeleton and the other session without the device.

Studieöversikt

Status

Har inte rekryterat ännu

Betingelser

Intervention / Behandling

Studietyp

Interventionell

Inskrivning (Beräknad)

10

Fas

  • Inte tillämpbar

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

  • Vuxen
  • Äldre vuxen

Tar emot friska volontärer

Nej

Beskrivning

Inclusion Criteria:

  • COPD Diagnosis & Severity: Documented FEV1/FVC ratio of < 0.7 and a post-bronchodilator FEV1% predicted between 30% and 80% (classifying as moderate to severe COPD).
  • Age Requirement: Must be between 45 and 75 years old.
  • Body Mass Index (BMI): Must have a BMI of less than 35 kg/m^2.
  • Medical Clearance & Screening: Must undergo post-bronchodilator spirometry, successfully pass the screening protocol, and receive formal clearance for participation from a physician.

Exclusion Criteria:

  • Failing to pass the initial spirometry test.
  • Not being formally cleared for participation by a physician.
  • Having a diagnosed pulmonary or cardiac issue that would pose a safety hazard during the laboratory treadmill exercise trials.

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Enhetens genomförbarhet
  • Tilldelning: Randomiserad
  • Interventionsmodell: Enskild gruppuppgift
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Inget ingripande: Standard Walking (No Hip Exoskeleton)
Subjects will walk on a treadmill at a preferred speed.
Experimentell: Hip Exoskeleton-Assisted Walking
Subjects will walk on a treadmill while wearing a hip exoskeleton providing them assistance.
Enhet: Hip Exoskeleton-Assisted Walking
The intervention is a wearable hip exoskeleton designed to provide assistive torque during treadmill walking. During the assisted walking condition, participants will wear the exoskeleton secured around the waist and thighs. The device will provide powered assistance to the hip joints during walking to reduce the physical demand of locomotion. Participants will complete a 30-minute treadmill walking session at an individualized workload determined during an initial exercise calibration visit. The effects of hip exoskeleton assistance will be evaluated by comparing physiological, respiratory, biomechanical, and exercise tolerance outcomes with a standard walking condition performed without exoskeleton assistance.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Respiratory Rate and Timing
Tidsram: Continuous assessment during the 30-minute treadmill walking bout within each single-day experimental session.
Measured continuously in real-time using Respiratory Inductance Plethysmography bands worn around the chest and abdomen.
Continuous assessment during the 30-minute treadmill walking bout within each single-day experimental session.
Locomotor-Respiratory Coupling (LRC) Ratios
Tidsram: Continuous assessment during the 30-minute treadmill walking bout within each single-day experimental session.
Quantifies the frequency coupling and synchronization between breathing cycles (via RIP bands) and walking cycles (via an SMTEC footswitch system to detect heel strikes).
Continuous assessment during the 30-minute treadmill walking bout within each single-day experimental session.
Dyspnea (Perceived Breathlessness)
Tidsram: Assessed at the end of each treadmill walking bout during the 30-minute exercise session.
Evaluated at the end of each exercise bout using the Modified Borg Scale, ranging from 0 (no breathlessness) to 10 (maximum breathlessness)
Assessed at the end of each treadmill walking bout during the 30-minute exercise session.
Dynamic Hyperinflation
Tidsram: Measured via spirometry at baseline (pre-exercise) and immediately following the treadmill walking session.
Evaluated by monitoring the reduction in Inspiratory Capacity (the maximum volume of air inhaled after a regular, calm exhalation) via baseline and post-exercise spirometry.
Measured via spirometry at baseline (pre-exercise) and immediately following the treadmill walking session.
Walking Kinematics
Tidsram: Continuously recorded during the active 30-minute treadmill walking period in each session.
Captured at 100 Hz using a 17-camera high-speed digital motion capture system with reflective anatomical markers placed on the lower limbs.
Continuously recorded during the active 30-minute treadmill walking period in each session.
Total Walking Time
Tidsram: Recorded as the exact cumulative duration of all active walking bouts during the 30-minute session.
Measured precisely using digital stopwatches to record the exact duration of walking bouts during the 30-minute session.
Recorded as the exact cumulative duration of all active walking bouts during the 30-minute session.
Metabolic Cost / Metabolic Equivalents of Task (METs)
Tidsram: Continuous assessment during the 30-minute treadmill walking bout within each single-day experimental session.
Determined by measuring net O2 consumption and CO2 production using indirect calorimetry.
Continuous assessment during the 30-minute treadmill walking bout within each single-day experimental session.

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

University of Nebraska

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Beräknad)

1 september 2026

Primärt slutförande (Beräknad)

1 september 2027

Avslutad studie (Beräknad)

1 september 2028

Studieregistreringsdatum

Först inskickad

8 juli 2026

Först inskickad som uppfyllde QC-kriterierna

8 juli 2026

Första postat (Faktisk)

14 juli 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

14 juli 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

8 juli 2026

Senast verifierad

1 juli 2026

Mer information

Termer relaterade till denna studie

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • COPD

Plan för individuella deltagardata (IPD)

Planerar du att dela individuella deltagardata (IPD)?

NEJ

IPD-planbeskrivning

As this is a pilot study intended to generate preliminary data and establish feasibility, individual participant data (IPD) will not be publicly shared at this stage. Data sharing will be re-evaluated during future, fully powered randomized clinical trials.

Läkemedels- och apparatinformation, studiedokument

Studerar en amerikansk FDA-reglerad läkemedelsprodukt

Nej

Studerar en amerikansk FDA-reglerad produktprodukt

Nej

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