Motor Plasticity, Intermittent Hypoxia and Sleep Apnea

NCT ID: NCT04017767

Last Updated: 2025-09-08

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2021-07-16

Study Completion Date

2025-07-01

Brief Summary

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The purpose of this study is to learn about the effect of sleep apnea and low oxygen on muscle strength and lung function in people with chronic spinal cord injury.

Detailed Description

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Conditions

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Sleep Apnea, Obstructive Spinal Cord Injuries Hypoxia

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

subjects with OSA compared to subjects without OSA based on their response to IH (intermittent hypoxia) exposure
Primary Study Purpose

OTHER

Blinding Strategy

NONE

Study Groups

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Moderate to Severe Obstructive Sleep Apnea (OSA)

Individuals with moderate to severe OSA defined as having an Apnea-hypopnea Index (AHI) that is greater than or equal to 15.

Group Type EXPERIMENTAL

Induced Acute Intermittent Hypoxia (AIH)

Intervention Type PROCEDURE

AIH will be administered on days 1-3. Each day entails 15 and 90 second hypoxic intervals (Fraction of Inspired Oxygen (FIO2) = 0.09) alternating with 60-second normoxic intervals (FIO2 = 0.21).

AIH mask

Intervention Type DEVICE

Induced Intermitted hypoxia will be delivered via the AIH mask. The mask has two one-way valves restricting inspiration to the top valve and expiration to the bottom valve. Hypoxic and normoxic gas mixtures will be delivered through the top valve.

Without OSA

Individuals without OSA defined as having AHI less than 5.

Group Type ACTIVE_COMPARATOR

Induced Acute Intermittent Hypoxia (AIH)

Intervention Type PROCEDURE

AIH will be administered on days 1-3. Each day entails 15 and 90 second hypoxic intervals (Fraction of Inspired Oxygen (FIO2) = 0.09) alternating with 60-second normoxic intervals (FIO2 = 0.21).

AIH mask

Intervention Type DEVICE

Induced Intermitted hypoxia will be delivered via the AIH mask. The mask has two one-way valves restricting inspiration to the top valve and expiration to the bottom valve. Hypoxic and normoxic gas mixtures will be delivered through the top valve.

Interventions

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Induced Acute Intermittent Hypoxia (AIH)

AIH will be administered on days 1-3. Each day entails 15 and 90 second hypoxic intervals (Fraction of Inspired Oxygen (FIO2) = 0.09) alternating with 60-second normoxic intervals (FIO2 = 0.21).

Intervention Type PROCEDURE

AIH mask

Induced Intermitted hypoxia will be delivered via the AIH mask. The mask has two one-way valves restricting inspiration to the top valve and expiration to the bottom valve. Hypoxic and normoxic gas mixtures will be delivered through the top valve.

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

1. Age 18 or older,
2. Chronic (≥ 1-year post-injury), non-progressive SCI,
3. Asia Impairment Scale (AIS) C or D,
4. Resting Saturated oxygen (SaO2) ≥ 95%,
5. Cervical injury (C5-C8)

Exclusion Criteria

1. Currently hospitalized,
2. Resting heart rate ≥120 Beats per minute (BPM),
3. Resting systolic blood pressure \>180 mmHg,
4. Resting diastolic Blood Pressure \>100 mmHg,
5. Self-reported history of unstable angina or myocardial infarction within the previous month,
6. OSA that is being treated with positive airway pressure therapy,
7. Women who know or suspect they may be pregnant or who may become pregnant,
8. Known underlying lung disease,
9. Pregnant Women,
10. Prisoners,
11. Unable to consent
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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The Craig H. Neilsen Foundation

OTHER

Sponsor Role collaborator

University of Miami

OTHER

Sponsor Role lead

Responsible Party

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Shirin Shafazand

Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Shirin Shafazand, MD

Role: PRINCIPAL_INVESTIGATOR

University of Miami

Locations

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University of Miami

Miami, Florida, United States

Site Status

Countries

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United States

Other Identifiers

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20190415

Identifier Type: -

Identifier Source: org_study_id

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