- ICH GCP
- US Clinical Trials Registry
- Klinisk forsøg NCT00936481
Study to Assess the Changes in Blood Clotting Factors and Blood Vessel Wall Function in Obstructive Sleep Apnea
Variability of Fibrinolytic Markers and Endothelial Function in Obstructive Sleep Apnea
Obstructive sleep apnea is a condition in which people have decreased breathing during their sleep. Untreated sleep apnea has been linked to increased risk for cardiovascular diseases.
This research study is looking at blood clotting factors and blood vessel function in health volunteers and patients with newly diagnosed or untreated obstructive sleep apnea to better understand the underlying mechanisms for increased cardiovascular risk.
Studieoversigt
Status
Betingelser
Detaljeret beskrivelse
Cardiovascular disease (CVD), which includes strokes, has been the number one killer in the United States.Each year about 700,000 people experience a new or recurrent stroke, which translates into about one stroke every 45 seconds. Apart from traditional risk factors for stroke such as hypertension, smoking and atrial fibrillation, obstructive sleep apnea is now being increasingly recognized as another important treatable risk factor.
The majority of strokes and myocardial infarctions are due to atherothrombotic events. Impaired fibrinolytic activity increases the propensity for thromboembolic events. Many different candidate molecules have been studied as the cause of a hypercoagulable state. Plasminogen Activator Inhibitor-1 (PAI-1) is the major physiologic inhibitor of the body's fibrinolytic system including the principal serine protease tissue-type plasminogen activator (t-PA). It is therefore poised to be a pivotal regulator of the fibrinolytic system.Recent studies have shown that PAI-1 levels are elevated in patients with obstructive sleep apnea (OSA) and that PAI-1 levels correlate with severity of OSA.
The purpose of this pilot study is twofold:
- To characterize changes in the blood levels of plasminogen activator inhibitor-1 (PAI-1) and tissue type plasminogen activator ( t-PA) across the 24 hour cycle in patients with obstructive sleep apnea, as compared to normal controls, and to further identify the pattern of changes with varying severity of obstructive sleep apnea, and
- To study endothelial function in patients with obstructive sleep apnea, as compared to normal controls.
Data gathered from this pilot study will be used to initiate a more comprehensive prospective study exploring the link between OSA, endothelial function, the fibrinolytic system and cardiovascular events. This area can be further explored by prospectively following patients to assess for a reduction in such events with treatment of OSA.
Undersøgelsestype
Tilmelding (Faktiske)
Kontakter og lokationer
Studiesteder
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Tennessee
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Nashville, Tennessee, Forenede Stater, 37232
- Vanderbilt University Medical Center,Department of Neurology
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Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Prøveudtagningsmetode
Studiebefolkning
Beskrivelse
Inclusion Criteria:
- Age 18 years or older.
- Subjects are able and willing to provide informed consent.
- Subjects are willing to cooperate with polysomnography and have serial blood draws over a 24-hour period.
- Evidence for OSA (AHI>5 events/hour) without treatment or suspected OSA based on symptoms in the patient group.
- Body mass index of 25-45
Exclusion Criteria:
- History of myocardial infarction, stroke or transient ischemic attack (TIA) or peripheral vascular disease.
- History of chronic diseases such as diabetes mellitus, uncontrolled hypertension (SBP >160, DBP > 120), renal failure on dialysis, cancer, autoimmune or liver disease.
- A significant history of medical or psychiatric disease that may impair participation in the trial.
- Evidence of medical instability (cardiac arrhythmias, congestive heart failure, pulmonary disease) that require an expedited evaluation and treatment of the OSA.
- History of alcohol, or drug abuse during the one-year-period prior to trial participation.
- Current use of tobacco products.
- Current treatment with angiotensin converting enzyme-inhibitors and or chronic use of non-steroidal anti-inflammatory agents.
- Another primary sleep disorder that requires intervention with medications or cause disrupted sleep.
- Patients with unusual sleep or wake habits, including shift work.
- Transmeridian travel in the previous 3 months.
- Patients with OSA who have already received treatment with CPAP, surgery or oral appliance.
- Pregnancy; as hormonal changes affect sleep disordered breathing.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Kohorter og interventioner
Gruppe / kohorte |
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Healthy controls
18 years or older with body mass index between 25-45
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Obstructive Sleep Apnea Group
Age 18 years or older with body mass index between 25 and 45
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Tidsramme |
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Comparison of Levels of Mean PAI-1 Activity in Patients With Obstructive Sleep Apnea and Controls.
Tidsramme: at the initial visit
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at the initial visit
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Sekundære resultatmål
Resultatmål |
Tidsramme |
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Comparison of Endothelial (Blood Vessel) Wall Diameter in Patients With Obstructive Sleep Apnea Versus Controls.
Tidsramme: at initial visit
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at initial visit
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Samarbejdspartnere og efterforskere
Sponsor
Efterforskere
- Ledende efterforsker: Kanika Bagai, M.D, Vanderbilt University Medical Center, Nashville, TN
Publikationer og nyttige links
Datoer for undersøgelser
Studer store datoer
Studiestart
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- 090265
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Kliniske forsøg med Obstruktiv søvnapnø
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University of Wisconsin, MadisonPhilips HealthcareAfsluttetSøvn, Slow-wave Sleep, Sleep Enhancement, Sleep Optimization
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Aventure ABAktiv, ikke rekrutterende
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National Taiwan University HospitalUkendt
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National University of SingaporeRekrutteringReduktion af skærmbrug + Sleep Extension | Frit levendeSingapore
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The First Affiliated Hospital of Shanxi Medical...Shanxi Medical UniversityAfsluttetSøvnkvalitet | Søvnvarighed | Sleep Onset LatencyKina
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Northwell HealthJazz PharmaceuticalsRekrutteringElektrisk status Epilepticus af Slow-Wave SleepForenede Stater
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University of Geneva, SwitzerlandAfsluttetNatlige benkramper | Sleep Wake Transition DisordersSchweiz
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Tyco Healthcare GroupUkendt
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Maastricht University Medical CenterEpilepsiecentrum KempenhaegheAfsluttetRolandsk Epilepsi | Landau-Kleffners syndrom | Natlig frontallappens epilepsi | Elektrisk status Epilepticus under Slow Wave SleepHolland