Active clinical trials for "Sleep Apnea, Obstructive"

Obstructive sleep apnea (OSA) and Obesity-Hypoventilation Syndrome (OHS) are common conditions in obesity, which may influence the prognosis in patients undergoing surgery. There is a need for simple screening tools to identify such patients at high risk. The current multicenter observational study aims to investigate occurrence of OSA and OHS in obese individuals undergoing elective abdominal surgery and further address its impact on perioperative and postoperative complications.

Background: Obstructive sleep apnea (OSA) refers to the apnea and hypopnea caused by upper airway obstruction during sleep. Patients are associated with sleep disorders, frequent desaturation, hypertension, coronary heart disease, cerebrovascular disease and diabetes. OSA prevalence increased in China in recent years. It is estimated that nearly 80% of men and 93% of women are not diagnosed for moderate and severe OSA. Anesthesiologists and surgeons paid more attention on those high risk patients. The gold standard for OSA diagnosis is apnea and hypopnea index (AHI) obtained from polysomnography (PSG). But it is difficult to carry out PSG regularly in primary health care institutions in China for its high cost and long waiting list. So many OSA questionnaires are developed in Europe and North America, obesity is an important risk factor for OSA for them. But in China people have different anatomical characteristics, the diagnosis sensitivity and specificity of those methods has not been reported in China. Methods and Design: Participants for this study will be recruited in Beijing Tongren Hospital scheduled for elective surgery under general anesthesia. A total of 1200 adult male patients will be enrolled. It is including 3 kinds of persons. 1. To accept PSG monitor in sleep center. 2. To receive OSA correction surgery (UPPP). 3. To receive ophthalmological surgery under general anesthesia. Detailed inquiry and record all medical history. Upper airway assessment will be recorded. Preoperative snoring questionnaires will be integrated according to the four questionnaires. All patients complete PSG monitor. For patients undergoing surgical treatment, postoperative continuous pulse oximetry will be recorded for 24 hours. All postoperative adverse events will be recorded. The primary endpoint: All the patients complete the four snoring questionnaires (ASA, Berlin, STOP and STOP-BANG) before PSG test. The secondary endpoints: PSG monitor will be completed before operation. Medical history, upper airway assessment, postoperative 24 hours continuous pulse oximetry monitor and all perioperative adverse events will be recorded. The purpose is to compare the specificity and sensitivity of four questionnaires to figure out OSA. To find suspected OSA patients before operation with one easy-to-use assessment questionnaire and direct OSA clinical practice.

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.

The purpose of this study is to evaluate the usability and suitability of the Drive app (app under test) to measure sleep parameters during CPAP use. This is a prospective, non-randomized, single arm exploratory study without blinding. Current users of CPAP therapy will be recruited for this study and will be provided with a smartphone (app under test installed) and a non-contact motion sensor in their home environment. These devices will measure sleep metrics such as sleep stages and breathing metrics that may be associated with sleep disordered breathing. Usage and setup instructions will be provided for the study. Participants will contribute up to 7 overnight recordings in the home environment and will complete daily questionnaires detailing their experience. The study may be completed in two distinct phases, with an analysis performed after each phase. Each phase is expected to last up to six weeks with the overall study duration taking up to 12 months.

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.

We aim to observe the unwanted effects of nightshift work and short term insomnia on erectile function of men aged between 25 to 60 years. We will also compare the levels of serum testosterone in the target group and compare it with the ones who don't work in hightshifts.

The investigators will compare the circulating fibrocyte proportion in asthmatic patients with obstructive sleep apnea (OSA) and not with OSA In addition, the investigators will compare the expression of epidermal growth factor receptor (EGFR), endothelin A receptor (ETAR) and connective tissue growth factor (CTGF) The association of those factors and annual decline of forced expiratory volume in 1 second (FEV1) will be performed

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.