Active clinical trials for "Sleep Apnea Syndromes"

The gold standard of obstructive sleep apnea (OSA) is (PSG)POLYSOMNOGRAPHY. During the examination, the patient is monitored by saturation, EEG and other measurements. Near infrared spectroscopy is an uprising technology allowing non invasive measurement of the frontal lobe oxygenation. It is painless and does not have side effects. We believe that brain saturation will be more accurate then peripheral pulse oximeter and will be better correlated with the clinical presentation of OSA.

Obstructive Sleep Apnea (OSA) is a severe condition of sleep respiratory disorders. It is characterized by partial (hypopnea) or total (apnea) obstruction of the upper airways, negatively affecting the general and oral health of children and adolescents. The Dentistry plays a fundamental role in OSA diagnosis and early intervention, minimizing health damage and progression of the disease into adulthood. Current scientific evidence related to OSA and associated factors, as well as the prevalence and severity of the disease in children and adolescents is still scarce and presents divergences in these age groups. A retrospective cross-sectional study will be conducted to investigate the prevalence, severity and correlation between sociodemographic, behavioral, clinical and sleep quality related factors and OSA in children and adolescents diagnosed by polysomnography (PSG), using the criteria recommended by the American Academy of Sleep Medicine (AASM). The sample will consist of individuals who answered the questionnaires, performed the PSG at the Pelotas Sleep Institute and met the study inclusion criteria.

The investigators would like to evaluate the variability of oxygen (and PPG) parameters during 7 nights at home. Oxygen (and PPG) parameters will also be evaluated during 1 night at the hospital (diagnostic polysomnography). Based on currently developed algorithms, surrogate apnea-hypopnea index (AHI), cardiovascular status and the variability of these parameters will be evaluated.

Continuous positive airway pressure (CPAP) is considered the gold standard treatment for patients with moderate to severe obstructive sleep apnea (OSA). Nasal and oronasal masks are often used interchangeably and are generally believed to be equally effective; the choice of interface for OSA therapy remains largely based on clinical judgement and patients preference. However, there is increasing evidence that CPAP delivered by an oronasal mask may be less effective, requires more pressure and are worse tolerated than nasal mask. Patients with OSA on oronasal mask are also less adherent to CPAP. Some authors have suggested that in some subjects, the CPAP was not effective when an oronasal mask was used. Moreover when pressures are increased to overcome the obstruction, a paradoxical obstruction may take place. Specific mechanisms explaining upper-airway obstruction events remain unclear and it is not known how many patients exhibit this behavior. This observational retrospective study is designed to compare a group of patients with obstructive sleep apnea with persistent obstructive events using oronasal masks during CPAP, that were fully recovered with the shift to nasal one with the same or also lower pressure, versus a control group of patients who did not report obstruction with oronasal masks. Aim of the study was to find differences in term of clinical, anatomical and physiological characteristics between these two groups.

The study aim of the project is to investigate the differences in respiratory functions, orofacial muscle tone changes, anxiety/depression, and quality of life of the patients according to the severity of Obstructive Sleep Apnea Syndrome. At the same time, to examine the reliability of the use of the MyotonPro evaluation method, which takes place rapidly in the literature and clinic, in the orofacial pharyngeal muscle group.

An observational clinical trial in a single centre. The objective of this study was to determine the efficacy of mandibular advancement device (MAD) therapy on snoring intensity, frequency, and oxygen desaturation periods in mild-moderate obstructive sleep apnea (OSA) patients with snoring problems. Totally, 18 mild-moderate OSA patients (8 females and 10 males) with subjective snoring complaint were selected. Each patient's diagnostic polysomnographic analysis (PSG) was accepted as initial PSG values. Each patient was subjected simple pulse oximeter (SPO) and smartphone sleep application (SSA) at 3 different nights at home. Diagnostic mean values of oxygen desaturation index (obtained by using SPO), snoring intensity score (obtained by using SSA), and snoring percentage (obtained by using SSA) were recorded. Non-titratable-customized MAD with 60-75% of maximal mandibular protrusion were fabricated. The patients were instructed to wear their MAD every night. SPO and SSA measurement were repeated at the 1st, 4th, 12th, and 24th week of the treatment process. At the 24th week of treatment, The PSG were repeated and all PSG, SPO, and SSA values were compared with initial diagnostic values.

OBJECTIVES To train and test a mathematical model to predict complete concentric collapse at the level of the palate (CCCp, primary) and other sites of upper airway collapse (secondary) during drug-induced sleep endoscopy (DISE) using the data captured during a diagnostic polysomnography (PSG). HYPOTHESIS The site, pattern and degree of upper airway collapse is associated with distinct flow features as captured during a baseline PSG. STUDY DESIGN Retrospective trial. STUDY POPULATION 200 patients with moderate to severe obstructive sleep apnea (OSA, AHI ≥ 15/h) who underwent both a DISE and a diagnostic PSG at the Antwerp University Hospital (UZA) between January 2018 and December 2020. OUTCOME MEASURES: Raw data as captured during a diagnostic PSG, including electroencephalography (EEG), flow, electrocardiography (ECG), electromyography (EMG), oxygen desaturation and breathing effort. SAMPLE SIZE / DATA ANALYSIS Data of 200 patients will be retrospectively included into this study protocol. Different machine learning techniques will be adopted to select features, train the model and test the model. TIME SCHEDULE January 30, 2021 - November 30, 2021

In this study respiratory and submental muscle activities during during inspiratory and expiratory breathing maneuver at specific workloads will be assessed according to inspiratory and expiratory muscle strength of each obstructive sleep apnea syndrome (OSAS) patient's.

Introduction: The aim of the study was to investigate the effectiveness of combined bipolar radiofrequency surgery of the tongue base (RFBT) and uvulopalatopharyngoplasty (UPPP) in a single session for obstructive sleep apnea (OSA) and to determine whether this combination is safe and well tolerated.

Objective: Obstructive Sleep Apnea-Hypopnea Syndrome (OSAHS) is a common sleep disorder requiring the time and money consuming full polysomnography to be diagnosed. Alternative methods for initial evaluation are sought. The investigators aim was the prediction of Apnea-Hypopnea Index (AHI) in patients suspected to suffer from OSAHS using two models based on nonlinear analysis of three biosignals during sleep. Methods: One hundred patients referred to a Sleep Unit underwent full polysomnography. Three nonlinear indices (Largest Lyapunov Exponent, Detrended Fluctuation Analysis and Approximate Entropy) were extracted from three biosignals (airflow from a nasal cannula, thoracic movement and Oxygen saturation) providing input to a data mining application for the creation of predictive models for AHI.