- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02922894
Treatment of Sleep Apnea in Patients With Cervical Spinal Cord Injury
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Patients with cervical spinal cord injury demonstrate central sleep disordered breathing manifesting as central sleep apnea or a periodic breathing pattern. Understanding the causes of central sleep apnea may be critically important to understanding upper airway obstruction in susceptible individuals, given the critical role of ventilatory motor output in maintaining upper airway patency as evidenced by upper airway narrowing or occlusion at the nadir of ventilator drive during periodic breathing. This study is likely to identify therapeutic strategies that could be tested in large clinical trials, with the ultimate goal of improving quality of life among patients with cervical SCI who also experience central sleep disordered breathing.
To this end the research proposal is aimed as follows:
Specific Aim 1: Test the hypothesis that patients with cervical SCI will demonstrate greater magnitude of long-term facilitation (LTF) following episodic hypoxia during sleep, compared to patients with thoracic Spinal cord injury. This aim will be accomplished by measuring the effect of acute episodic hypoxic ventilation and upper airway mechanics in both groups.
Specific Aim 2: Test the hypothesis that dampening peripheral chemoreceptor activity in patients with cervical SCI and central sleep disordered breathing (SDB) with supplemental oxygen will reduce central respiratory events and decrease respiratory variability during sleep. The aim will be accomplished by providing supplemental oxygen to participants with cervical SCI and central SDB.
Specific Aim 3: Test the hypothesis that administration of trazodone, in patients with cervical spinal cord injury and central SDB will decrease respiratory related arousals and central apnea index, and the propensity to develop central apnea, compared to placebo. To accomplish this aim, the investigators will test the acute effect of trazodone on respiratory related arousals and central sleep apnea, and the chronic effect on central apnea indices and the CO2 reserve.
The investigators will study subjects with SCI at T6 or above who are not on artificial ventilation. To characterize the sleep and breathing state of each subject, polysomnography and upper airway collapsibility will be measured at baseline. Then the following experiments will be conducted: an episodic hypoxia protocol vs normoxia will be used to determine whether cervical SCI will demonstrate greater magnitude of LTF. Experiments will be conducted to see whether dampening peripheral chemoreceptor activity in cervical SCI by giving supplemental oxygen will reduce the central respiratory events and reduce the breathing variability during sleep. A cross over experiment will be done to see whether administration of trazodone in patients with cervical SCI and central SDB decreases respiratory-related arousals and central apnea. The participant will be given the drug/placebo for one week then cross over after a 1 week wash out period to placebo.
Study Type
Enrollment (Estimated)
Phase
- Phase 4
Contacts and Locations
Study Contact
- Name: M Safwan Badr, M.D.
- Phone Number: 313-576-3548
- Email: m.badr@va.gov
Study Locations
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Michigan
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Detroit, Michigan, United States, 48201
- Recruiting
- John D. Dingell VA Medical Center
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Contact:
- M. Safwan Badr, MD
- Phone Number: 313-576-3548
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- healthy adults between the ages of 18 - 89
- chronic spinal cord injury patients (T6 and above), > 3 months since injury and not on mechanical ventilation, and have not received mechanical ventilation via tracheostomy in the past.
Exclusion Criteria:
- subjects ≤ 17 yrs old
- Pregnant and lactating females
- History of head trauma that resulted in neurological symptoms or loss of consciousness
- advanced heart, lung, metabolic, liver or chronic kidney disease.
- severe obstructive or restrictive respiratory defect by PFTs or history of tracheostomy
- extreme obesity defined for this protocol as BMI ≥ 40 kg/m2 (to avoid the effect of morbid obesity on ventilation).
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Other
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Acute episodic hypoxia
To test development of ventilatory augmentation following episodic hypoxia, defined as increased Hypoxic Ventilatory Response (HVR) from early to late hypoxic exposure episodes.
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The subjects will undergo 30 minutes of baseline monitoring followed by 15 episodes of one minute of episodic hypoxia with supplemental CO2 to maintain isocapnia.
This is followed by a 45 minute recovery period.
Room air will be administered instead of episodic hypoxia or supplemental oxygen..
|
Experimental: Supplemental oxygen
To use supplemental oxygen to decrease peripheral chemoreceptor activity in patients with SCI and central SDB.
In addition, perform a repeat evaluation after treatment with supplemental oxygen or sham O2 for 6 weeks to determine if correction of chronic intermittent hypoxia, which mitigates sensory LTF, results in decreased propensity to central apnea.
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Room air will be administered instead of episodic hypoxia or supplemental oxygen..
Supplemental oxygen therapy for 6 weeks
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Experimental: Trazodone or placebo
examine the effect of trazodone on breathing during sleep
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100mg before bedtime
One placebo pill before-bedtime
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in Tidal Volume
Time Frame: 1 Week
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Change in tidal volume from baseline to recovery period.
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1 Week
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Change in CO2 reserve (Delta-PETCO2-AT)
Time Frame: 1 Week
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CO2 reserve is the requisite change to induce central apnea is referred to as the CO2 reserve, which can be positive or negative
|
1 Week
|
Change in Apnea Hypopnea Index (AHI)
Time Frame: 1 week
|
AHI is used to indicate the severity of sleep apnea.
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1 week
|
Change in hypocapnic apneic threshold
Time Frame: 1 week
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The nadir pressure in the upper airway (supra-glotic pressure) prior to the occurrence of an arousal.
This is a physiological parameter.
|
1 week
|
Collaborators and Investigators
Collaborators
Investigators
- Principal Investigator: M Safwan Badr, M.D., John D. Dingell VA Medical Center
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimated)
Study Record Updates
Last Update Posted (Estimated)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Central Nervous System Diseases
- Nervous System Diseases
- Respiratory Tract Diseases
- Respiration Disorders
- Sleep Disorders, Intrinsic
- Dyssomnias
- Sleep Wake Disorders
- Trauma, Nervous System
- Signs and Symptoms, Respiratory
- Spinal Cord Diseases
- Sleep Apnea Syndromes
- Apnea
- Wounds and Injuries
- Spinal Cord Injuries
- Physiological Effects of Drugs
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Central Nervous System Depressants
- Tranquilizing Agents
- Psychotropic Drugs
- Neurotransmitter Uptake Inhibitors
- Membrane Transport Modulators
- Serotonin Agents
- Antidepressive Agents
- Anti-Anxiety Agents
- Antidepressive Agents, Second-Generation
- Selective Serotonin Reuptake Inhibitors
- Trazodone
Other Study ID Numbers
- 1607015110
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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