Obstructive Sleep Apnea Clinical Trial
Official title:
Pathophysiology of the Upper Airway in Patients With Chronic Obstructive Pulmonary Disease (COPD) and Concomitant Obstructive Sleep Apnea (OSA)
Verified date | May 2020 |
Source | University of California, San Diego |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Interventional |
The purpose of study is to evaluate the physiologic effects of pulmonary tissue/structural
changes associated with COPD and upper airway inflammation on upper airway collapsibility.
Upper airway collapsibility is closely associated with development of obstructive sleep apnea
(OSA), which is a common disease characterized by repetitive collapse of upper airway during
sleep, leading to hypoxemia and arousal. OSA has important neurocognitive and cardiovascular
consequences, especially in patients with COPD.
Participants in this research study will undergo two overnight sleep studies (PSGs),
pulmonary function test, and CT scan of the upper airway and chest. The first sleep study
will evaluate the sleep breathing disorder and the second sleep study will measure the upper
airway collapsibility, called critical closing pressure (Pcrit). Pcrit is measured by a
modified continuous positive airway pressure (CPAP) machine which can provide a wide range of
pressures between 20 and -20 cmH2O in order to modify upper airway pressure.
Status | Terminated |
Enrollment | 24 |
Est. completion date | August 11, 2016 |
Est. primary completion date | August 11, 2016 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | All |
Age group | 40 Years to 70 Years |
Eligibility |
Inclusion Criteria for COPD Subjects: - Age range 40-70 years. - Demonstrated moderate to severe COPD as determined by spirometry (post-bronchodilator spirometry FEV1/FVC < 0.70 for diagnosing CODP and FEV1<80% predicted for staging) - Smoking history of = 10 pack-years Inclusion Criteria for Control Subjects - Age range 40-70 years - Demonstrated no COPD as determined by normal spirometry (post-bronchodilator spirometry FEV1/FVC > 0.70 for diagnosing CODP and FEV1<80% predicted for staging) - No smoking history as defined by less than 100 cigarettes smoked in a lifetime Exclusion Criteria for both COPD and Control Subjects: - Metal objects that may interfere with chest CT quantification including presence of a cardiac pacemaker, defibrillator, metal prosthetic heart valve, metal projectile or metal weapon fragment (bullet, shrapnel, shotgun shot) or metal shoulder prosthesis - Subjects unable to perform spirometry due to: - chest or abdominal surgery in the past three months - a heart attack in the last three months - detached retina or eye surgery in the past three months - hospitalization for any other heart problem in the past month - History of hypersensitivity to Afrin, Lidocaine or albuterol - A psychiatric disorder, other than mild depression; e.g. schizophrenia, bipolar disorder, major depression, panic or anxiety disorders. - More than 10 cups of beverages with caffeine (coffee, tea, soda/pop) per day - Pregnancy or suspected pregnancy |
Country | Name | City | State |
---|---|---|---|
United States | University of California, San Diego | San Diego | California |
Lead Sponsor | Collaborator |
---|---|
University of California, San Diego |
United States,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Critical closing pressure (PCrit) | Measured during overnight sleep study | Baseline | |
Secondary | Pharyngeal lavage cell count distribution | Baseline | ||
Secondary | Minimal later airway dimension (mLAT) | Measured from upper airway CT scan | Baseline | |
Secondary | Minimal anteroposterior airway dimension (mAP) | Measured from upper airway CT scan | Baseline | |
Secondary | Minimal cross sectional airway area (mCSA) | Measured from upper airway CT scan | Baseline | |
Secondary | Lateral airway dimension on hard palate/uvula/epiglottis level | Measured from upper airway CT scan | Baseline | |
Secondary | Anteroposterior airway dimension on hard palate/uvula/epiglottis level | Measured from upper airway CT scan | Baseline | |
Secondary | Cross-sectional airway area on hard palate/uvula/epiglottis level | Measured from upper airway CT scan | Baseline | |
Secondary | Distance between the lower edge of the mandible and the lower edge of the hyoid (MH) | Measured from upper airway CT scan | Baseline | |
Secondary | Upper airway length | Measured from upper airway CT scan | Baseline | |
Secondary | Width of hard palate | Measured from upper airway CT scan | Baseline | |
Secondary | Nasophayngeal/retropalatal/retroglossal pharyngeal cavity volume | Measured from upper airway CT scan | Baseline | |
Secondary | Volume within the cervico-mandibular bony frame | Measured from upper airway CT scan | Baseline | |
Secondary | Volume of retropalatal/retroglossal soft tissue | Baseline | ||
Secondary | Parapharyngeal fat pad volume | Baseline | ||
Secondary | Tongue volume | Baseline | ||
Secondary | Emphysema score | Measured from CT chest scan | Baseline | |
Secondary | Emphysema distribution | Measured from CT chest scan | Baseline | |
Secondary | Lower airway wall thickness on chest CT scan | Measured from CT chest scan | Baseline | |
Secondary | Forced expiratory volume in 1 second (FEV1) | Baseline | ||
Secondary | Total lung capacity (TLC) | Baseline | ||
Secondary | Ratio of residual volume / total lung capacity (RV/TLC) | Baseline | ||
Secondary | Diffusing capacity of the lung for carbon monoxide (DLCO) | Baseline |
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