Active clinical trials for "Apnea"

The sleep apnea-hypopnea syndrome (SAHS) is a respiratory disorder characterized by frequent breathing cessations (apneas) or partial collapses (hypopneas) during sleep. SAHS is linked with the most important causes of death in adults from industrialized countries. Metabolic deregulation and cardiovascular and cerebrovascular diseases, such as atrial fibrillation, stroke, myocardial infarction and sudden cardiac death, could affect people having untreated SAHS. The gold standard method for SAHS diagnosis is in-hospital, technician-attended nocturnal polysomnography (PSG). Nevertheless, this methodology is labor-intensive, time-consuming, and relatively unavailable, especially in low-resource settings. These drawbacks have led to large waiting lists, which delay diagnosis and treatment and limits its effectiveness as single diagnostic method for SAHS. Blood oxygen saturation (SpO2) and pulse rate (PR) from nocturnal pulse oximetry (NPO) provide relevant and essential information to detect apneas. In addition, it is significantly less intrusive for patients and it can be easily recorded at patients' home. In the same way, automated signal processing and pattern recognition techniques have demonstrated to provide accurate tools able to detect and effectively use this information. Therefore, the investigators hypothesize that automated pattern recognition of at-home NPO recordings could provide reliable and efficient tools able to simplify the management of SAHS. The aim of this study is two-fold: 1) to prospectively assess the reliability and effectiveness of at-home NPO in the context of adult SAHS; 2) to design, optimize and extensively assess the diagnostic performance of automated NPO-based screening tools for SAHS. In order to achieve these goals, both PSG and NPO recordings are carried out ambulatory and simultaneously at patient's home. A portable polysomnograph (Embletta MPR, Natus) is used for standard PSG at home, whereas a portable wrist-worn pulse oximeter (WristOX2 3150, Nonin) is used for ambulatory NPO. In addition, conventional in-lab PSG and attended pulse oximetry are also performed simultaneously in the hospital facilities.

By clinical record review, this retrospective study aims to compare the mortality of sepsis patients with versus without obstructive sleep apnea, who were diagnosed and treated in Taipei Veterans General Hospital, Taiwan.

The purpose of this study is to evaluate the relationship between DME and obstructive sleep apnea (OSA). OSA impacts millions of North Americans, many of whom are undiagnosed. The investigators aim to evaluate if a relationship exists between the two diseases, whether or not the severity of OSA impacts the severity of DME, and whether treating OSA results in better treatment outcomes for DME. The study will involve the standard of care provided for both DME (involving anti-VEGF injections) and OSA (involving continuous positive airway pressure [CPAP] machine).Approximately 150 subjects are expected to be enrolled in this study. In summary: Question 1: Is there a correlation between DME and OSA? Question 2: Is there a relationship between the severity of DME (CRT and vision) and OSA (AHI index)? Question 3: Does treating OSA result in improving DME metrics, and does it neutralize the outcomes at 1 year compared to OSA negatives.

Obstructive sleep apnea (OSA) is a common nocturnal breathing disorder characterized by complete (apnea) and partial (hypopnea) breathing cessations during sleep. Currently, clinical diagnosis of OSA is based on the clinical symptoms, especially excessive daytime sleepiness, and apnea-hypopnea index (AHI) providing a limited overview of the breathing cessation event frequency during the night. Longer obstruction events and deeper desaturations have been suggested to be more harmful than shorter and shallower events and these individual characteristics are completely neglected by conventional and currently used AHI. The investigators have previously introduced novel diagnostic parameters incorporating the number, duration and morphology of individual obstruction events and shown that they improve the severity estimation of OSA compared to traditional measures. Even though, the novel diagnostic parameters have so far tackled some of shortcomings of AHI, they need to be refined to further increase the accuracy of the OSA severity estimation. It has been shown that age, body mass index (BMI) and sleeping position are strongly related to the severity OSA. However, it is not thoroughly studied whether the severity of individual obstruction events progress over time (the aging process) and which factors affect to this progression. It is known that OSA patients with similar AHI values, durations of individual breathing cessation events can differ significantly. Longer and deeper events are connected to increased mortality rate in patients with moderate or severe OSA and thus, could be considered to be more detrimental than shorter and shallower ones. However, it has not been thoroughly investigated whether in severe OSA patients with identical AHI values, sleep efficiency or hypertension is related to the severity of individual breathing cessation events. The investigators planned to explore, whether the individual breathing cessation event severity progress over time and how different confounding factors affect this progression. Furthermore, the correlation of EDS with the individual breathing cessation event severity, sleep structure, and frequency and occurrence of cortical arousals will be investigated. Also, the investigators will explore whether the percentage time of disturbed breathing from total sleep time is related to sleep efficiency or hypertension in severe OSA patients having similar AHI. Moreover, Positional therapy (PT) i.e., the avoidance of the supine posture during sleep is the treatment of choice for Positional Patients (PP) having most of their breathing abnormalities while sleeping supine. Since it is known that apneas/hypopneas are more severe while sleeping supine, this time the investigators will assess the therapeutic value of PT for severe Non Positional patients (NPP).

The study's aim is to determinate the prevalence of obstructive sleep apnea hypopnea syndrome after treatment by combined chemoradiotherapy in a locally advanced stages treated population of oropharyngeal cancer. Indeed, the level of knowledge about the consequences of oropharyngeal cancer treatment on sleep quality remains poor but the few studies published on the subject suggest an increased risk of development of OSAHS for these patients.

Insomnia and OSA coexist in clinical populations, but the prevalence of comorbid insomnia among OSA patients in the community and risk factors remain poorly known. Little is known about the impact of sleep apnea and insomnia on the quality of life and quality of sleep compared to the presence of one of the sleep disorders alone. Our hypothesis is that the co-existence of OSA and insomnia is high in our community. We also hypothesized that the co-existence of OSA and insomnia promotes greater impairment of quality of life and quality of sleep when compared to the presence of OSA or insomnia alone. Patients referred to polysomnography will be submitted to 6 questionnaires to assess daytime sleepiness (EPWORTH), insomnia severity index (ISI), anxiety and depression assessment (Beck's anxiety and depression inventory), quality of life assessment(WHOQOL- BREF) and sleep quality assessment (Pittsburgh questionnaire) and they will also be submitted to a polysomnography type III. It will be calculated the frequency of insomnia, OSA and the comorbidity between insomnia and OSA in the sample. It will be analysed correlations between the insomnia severity index, apnea and hypopnea index, Epworth sleepiness scale, quality of life scale (WHOQOL-BREF), anxiety and depression scale (Beck's anxiety and depression inventory) and Pittsburgh sleep quality scale. Insomnia severity index scores, Epworth sleepiness scale, quality of life scale (WHOQOL-BREF), anxiety and depression scale (Beck anxiety and depression inventory) and Pittsburgh sleep quality scale will be compared according to the presence and absence of OSA and the presence and absence of insomnia and the presence of the comorbidity insomnia and OSA.

The growing evidence showed that the OSA is a heritable complex genetic disease where the genetic basis contributed the development of OSA and its sequel. The phenotyping of OSA include high level and intermediate level. The former indicates the AHI, and later includes craniofacial morphology, ventilator control, obesity, and sleepiness vulnerability. Many studies tried to determine the association of candidate genes with OSA through association studies. However, the results were conflicting. We identified 37 candidate genes involved in six biologic pathways of OSA reported in previous literatures, including oxidative phosphorylation, cell signaling, apoptosis, cellular adhesion and motility, cell cycle, and cytokine/chemokine. To investigate the association between phenotype and genotype of OSA, we conducted this cross-sectional study by recruiting the patients of moderate-severe OSA (index proband) and their first and second-degree family members, and friends and their family members (control family) and using candidate genes reported in the literature and whole genome SNP array for genotype approach.

The literature does not discuss if the fast oral appliance titration (30 days period) in Obstructive Sleep Apnea Syndrome (OSAS) treatment, may improve subjects quality of life in such brief period. Temporomandibular dysfunction-related (TMD) is one of the most important side effects observed in OSAS treatment with oral appliance. Since the effectiveness of mandibular exercises in the control of TMD pain has already been verified, it may play a fundamental role in the support of the fast oral appliance titration.

Acoustic Pharyngometry (AP) is a method of measurement of Transversal Sectional Areas (TSA) and Volumes of oral cavity and pharynx, based on acoustic waves. The aim of this study is to describe changes on oropharynx dimensions caused by CPAP (Continuous Positive Air Pressure) in patients with severe Obstructive Sleep Apnea Syndrome when compared with patients with Primary Snore, using AP. The exam will be made during the use of CPAP, at various pressures. The investigators also intend to determine if pressure determined by Polysomnography in OSAS patients cause some type of different change in AP graphic.

Subjects with Obstructive Sleep Apnea (OSA) are at increased risk of developing cardiometabolic complications, and effective long-term nCPAP treatment significantly reduces the risk of cardiovascular morbidity and mortality.