Active clinical trials for "Sleep Apnea, Obstructive"

AIM AND HYPOTHESIS: The purpose of this study is to monitor the bioburden and impedance characteristics of a prototype mask system and to evaluate the usability of the mask system. The mask system will be assessed according to objective data recordings and user questionnaires. It is hypothesised that the prototype mask components will not pose a health risk (with regards to bioburden and impedance) and that the mask system will pass usability objectives to adequately deliver CPAP treatment.

In Obstructive sleep apnea (OSA) patients, sleep is disrupted and sleep quality is very poor. The investigators can suppose that with continuous positive airway pressure (CPAP) therapy, there is an improvement in sleep quality, such that patients need less sleep to be fit. Sleep schedules on mid term periods in OSA patients under CPAP therapy has not been studied. The investigators have planned to study sleep schemes before and after CPAP therapy in moderate to severe sleepy OSA patients.

Hypothesis:Sleep Disorders are very common during pregnancy but the their exact role in causation of pregnancy related disorders is yet to be determined. OSA can complicate pregnancy given the risk factors of weight gain, upper displacement of the diaphragm, and hormonal-induced hyperaemia of the nasopharyngeal passages. SDB confers the risk of hypertensive disorders of pregnancy and is associated with adverse maternal and foetal outcomes. The study would involve pregnant females which would be prospectively followed in pregnancy and post partum to know the prevalence of sleep disorders in pregnancy. Diagnosis of sleep disorders would be confirmed by overnight polysomnography and ambulatory blood pressure monitoring. Pregnancy outcomes, both maternal and fetal would be recorded and its relation with sleep disorders in pregnancy would be analysed.

The purpose of this randomised controlled study is to determine the impact of continuous positive airway pressure (CPAP) versus sub-therapeutic CPAP (placebo) on the control of gait upon severe sleep apnea patients, based on stride time variability.

The aim of this study was to evaluate the dynamic changes of the tongue in patients with obstructive sleep apnoea hypopnea syndrome (OSAHS) during sleep and while awake by using Ultrafast Magnetic Resonance Imaging (UMRI)

Plan of investigation: This is an observational cohort study to determine the effect of OSA, independent of other risk factors, on postoperative vascular events. The study is conceived, designed and will be conducted, and analyzed independent to any company. There is no commercial sponsorship.

Investigate urinary leukotriene E4 levels and determine if there is a correlation with severity of obstructive sleep apnea. The investigators then would like to determine a threshold level which could then be used for confirmation of diagnosis of obstructive sleep apnea (OSA).

In this research study the investigators want to learn more about the risk of developing blood vessel and heart disease from night-time sleep apnea. Sleep apnea is a condition that results from blocking of the throat during sleep. This study examines changes in blood pressure, blood vessel stiffness, heart size and levels of specific substances in the blood which may cause heart disease. This study is for children ages 5 to 13 years. The study involves 3 visits over 18 months. The first and last visits include an overnight sleep study (polysomnography or PSG). All the visits will include: body measurements to measure growth and how weight is distributed, resting blood pressure measurements, heart measurements (electrocardiogram and ultrasounds of the heart and blood vessels), 36 hour home ambulatory blood pressure measurements, blood tests to look at things like fats, cholesterol, inflammatory factors, questionnaires Optional parts of the study include DNA and for children 8 years and older, testing and questionnaires to learn more about how sleep relates to learning, memory and behavior issues.

In view of the hormonal changes induced by both sleep deprivation and obstructive sleep apnea syndrome (OSA), and the importance of maintaining these hormones in reproductive processes. The present study aims to evaluate the effects of the OSA or sleep deprivation (total or selective REM sleep for 48h) on reproductive function in adult men with normal body mass index.

There is some evidence suggesting that OSA is associated with low level of systemic inflammation and oxidative stress. Low level systemic inflammation and subsequent vascular damage has been implicated as the underlying mechanism responsible for comorbidities. Detection of altered inflammatory markers in OSAS patients may predict the degree of nocturnal sleep disturbance and associated systemic inflammation and presence of comorbidities. Recently, novel inflammatory biomarkers, such as neutrophil to lymphocyte ratio (NLR) have been proposed as an indicator of systemic inflammation. To our knowledge, NLR has not been studied in OSAS. We conducted the present study to evaluate the association between OSAS and inflammatory markers CRP, ESR and NLR.