About this trial
This study will investigate potential therapeutic approaches for sleep-disordered breathing (SDB) in patients with chronic cervical spine injury (\>6 months post-injury).
Eligibility criteria
This trial accepts healthy volunteersQualifiers
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.
Disqualifiers
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.
Trial design
Crossover
Treatments tested in this trial
Acute episodic hypoxia
Procedure/SurgeryThe 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.
Supplemental oxygen
Procedure/SurgerySupplemental oxygen therapy for 6 weeks
Trazodone
Drug100mg before bedtime
Placebo
DrugOne placebo pill before-bedtime
Sham
Procedure/SurgeryRoom air will be administered instead of episodic hypoxia or supplemental oxygen..
Treatment groups
Trial outcomes
Primary outcomes
Change in Tidal Volume
Change in tidal volume from baseline to recovery period.
Change in CO2 reserve (Delta-PETCO2-AT)
CO2 reserve is the requisite change to induce central apnea is referred to as the CO2 reserve, which can be positive or negative
Change in Apnea Hypopnea Index (AHI)
AHI is used to indicate the severity of sleep apnea.
Change in hypocapnic apneic threshold
The nadir pressure in the upper airway (supra-glotic pressure) prior to the occurrence of an arousal. This is a physiological parameter.
Sponsors and contacts
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John D. Dingell VA Medical Center
Lead sponsor
United States Department of Defense
Collaborator