BioFLO for Respiratory Recovery in SCI
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT06011876 |
Recruitment Status :
Recruiting
First Posted : August 25, 2023
Last Update Posted : January 3, 2024
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Condition or disease | Intervention/treatment | Phase |
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Spinal Cord Injuries | Other: Acute Intermittent Hypoxia (AIH) Other: Acute Intermittent Hypercapnic-Hypoxia (AIHH) Other: Sham AIH | Not Applicable |
This study will consist of two parts - single-session testing days, and respiratory strength training blocks. If a participant is not eligible to enroll in single-day testing, they will be asked to enroll in only the respiratory strength training blocks.
On single-session testing days, participants will be asked to come in on three separate days they will complete a battery of tests, then be given one of three interventions, and then complete the same battery of tests. The three interventions are acute intermittent hypoxia (AIH), acute intermittent hypercapnic-hypoxia (AIHH), or sham acute intermittent hypoxia (sham AIH). These interventions are explained in more detail below.
During respiratory strength training blocks, participants will receive five days of AIH, AIHH, or sham AIH in combination with respiratory strength training, which uses small hand-held devices to strengthen the muscles used for breathing. Participants will be asked to complete all three blocks to receive all three interventions. In addition to 5 days of interventions and respiratory strength training, the respiratory strength training blocks include testing 1 day, 3 days, and 7 days after the 5 days of respiratory strength training.
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 62 participants |
Allocation: | Randomized |
Intervention Model: | Crossover Assignment |
Masking: | Double (Participant, Investigator) |
Primary Purpose: | Treatment |
Official Title: | Genetic Biomarkers of Intermittent Hypoxia-Induced Respiratory Motor Plasticity in Chronic SCI |
Actual Study Start Date : | December 21, 2023 |
Estimated Primary Completion Date : | July 2027 |
Estimated Study Completion Date : | September 2027 |
Arm | Intervention/treatment |
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Experimental: Single-session testing days
Participants will complete three separate single-session testing days. Baseline testing will be performed, then on each day, participants will receive AIH, AIHH, and sham AIH in random order. Post-testing will occur after each intervention.
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Other: Acute Intermittent Hypoxia (AIH)
AIH (acute intermittent hypoxia) consists of short episodes of low oxygen (9% O2). Other: Acute Intermittent Hypercapnic-Hypoxia (AIHH) AIHH consists of short episodes of low oxygen (9% O2) and elevated carbon dioxide (4% CO2). Other: Sham AIH A single session of sham AIH with episodes of normal room air (21% O2). |
Experimental: Respiratory strength training blocks
Participants will complete three separate respiratory strength training blocks. In each block, participants will receive 5 days of AIH, 5 days of AIHH, and 5 days of sham AIH in random order, followed by respiratory strength training. Each block will include 5 days of intervention and training, and post-testing 1, 3, and 7 days after intervention and training has concluded.
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Other: Acute Intermittent Hypoxia (AIH)
AIH (acute intermittent hypoxia) consists of short episodes of low oxygen (9% O2). Other: Acute Intermittent Hypercapnic-Hypoxia (AIHH) AIHH consists of short episodes of low oxygen (9% O2) and elevated carbon dioxide (4% CO2). Other: Sham AIH A single session of sham AIH with episodes of normal room air (21% O2). |
- Change in motor evoked potential [ Time Frame: Baseline, and 45-60 minutes after intervention on AIH day, AIHH day, and Sham AIH day ]The change in peak-to-peak amplitude of the motor evoked potential of the diaphragm will be tested using transcranial magnetic stimulation.
- Change in maximal inspiratory pressure [ Time Frame: Baseline, 1 day, 3 days, and 7 days after intervention blocks (daily AIH + respiratory strength training, daily AIHH + respiratory strength training, daily sham AIH + respiratory strength training.) ]Maximal inspiratory pressure is a non-invasive measure of the maximal force achieved when breathing in against an occluded airway.
- Change in maximal expiratory pressure [ Time Frame: Baseline, 1 day, 3 days, and 7 days after intervention blocks (daily AIH + respiratory strength training, daily AIHH + respiratory strength training, daily sham AIH + respiratory strength training.) ]Maximal expiratory pressure is a non-invasive measure of the maximal force achieved when breathing out against an occluded airway.
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years to 70 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Adults 18-70 years of age
- Chronic SCI for > 1 year, at or below C-3 to T-12
- Incomplete SCI based on residual sensory or motor function below the level of the injury, or injury classification of B, C, D at initial screening, according to the American Spinal Injury Association Impairment Classification, and the International Standards for the Neurological Classification of SCI
- Medically stable with physician clearance
- SCI due to non-progressive etiology
- 20% impairment in maximal inspiratory or expiratory pressure generation, relative to normative values
Exclusion Criteria:
- Current diagnosis of an additional neurologic condition such as Multiple Sclerosis, Parkinson disease, stroke, or brain injury
- Severe illness or infection, including non-healing decubitus ulcers, untreated bladder or urinary tract infections, cardiovascular disease, lung disease, active heterotopic ossification, or uncontrolled hypertension
- Severe neuropathic pain
- Known pregnancy
- Severe recurrent autonomic dysreflexia
Exclusion for involvement in TMS - History of seizure disorder, uncontrolled migraines, presence of cardiac pacemaker, metal implants in skull, medications that lower seizure threshold.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT06011876
Contact: Emily J Fox, PT, MHS, PhD | 904-742-2500 | ejfox@phhp.ufl.edu | |
Contact: Hannah Snyder, M.S. | 904-345-6910 | Hannah.snyder@brooksrehab.org |
United States, Florida | |
Brooks Rehabilitation | Recruiting |
Jacksonville, Florida, United States, 32216 | |
Contact: Emily J. Fox, MHS, DPT, PhD (904) 742-2500 ejfox@phhp.ufl.edu |
Principal Investigator: | Emily Fox, DPT, MHS, PhD | University of Florida & Brooks Rehabilitation |
Responsible Party: | University of Florida |
ClinicalTrials.gov Identifier: | NCT06011876 |
Other Study ID Numbers: |
IRB202202891 W81XWH2210478 ( Other Grant/Funding Number: US ARMY MED RES ACQUISITION ) |
First Posted: | August 25, 2023 Key Record Dates |
Last Update Posted: | January 3, 2024 |
Last Verified: | January 2024 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
acute intermittent hypoxia spinal cord injury breathing motor function |
Spinal Cord Injuries Spinal Cord Diseases Central Nervous System Diseases |
Nervous System Diseases Trauma, Nervous System Wounds and Injuries |