Clinical Research Directory

Orthognathic Surgery and Obstructive Sleep Apnea Assessed by Mandibular Jaw Movement Monitoring (SUNRISE-ORTHO)

Orthognathic surgery changes the skeletal framework of the upper airway, but its functional effect on sleep-disordered breathing remains poorly documented, particularly with respect to respiratory effort. This prospective, exploratory, single-center pilot study will describe changes in the apnea-hypopnea index (AHI) and in respiratory effort burden (REMOV, percentage of total sleep time with increased respiratory effort) measured with the Sunrise mandibular jaw movement (MJM) home sleep monitoring device, from 1 month before to 6 months after orthognathic surgery (bilateral sagittal split osteotomy with or without Le Fort I osteotomy). Twenty-five patients aged 15 years or older, scheduled for orthognathic surgery as part of standard care at CHR Sambre et Meuse (Namur, Belgium) and screened positive for sleep-disordered breathing risk, will be included. Results will be used to generate hypotheses and to size a future confirmatory study.

Development and Clinical Validation of Artificial Intelligence Algorithms for Sleep Staging and Obstructive Sleep Apnea Screening Based on a Large-Scale Model Trained on Multimodal Physiological Signals From Diverse Populations

In recent years, wearable and contactless devices, including smart rings, smart bands/watches, and smart mattresses, have developed rapidly and can continuously collect multidimensional data such as heart rate, oxygen saturation, respiration, body movement, snoring, body temperature, and environmental parameters. Nevertheless, most current consumer-grade or wellness-oriented devices have not been trained and validated using large polysomnography (PSG)-synchronized reference datasets. Their accuracy, robustness, and interpretability in people with insomnia, obstructive sleep apnea (OSA), and other sleep disorders therefore require systematic evaluation. Leveraging a multicenter clinical sleep-medicine platform, this study will synchronously collect standard full-night polysomnography (PSG) data, continuous body-temperature data, smart-ring sensor data, contactless sleep-monitoring belt data, and indoor environmental monitoring data from the same participant during the same monitoring night. A clinical sleep database will be established with PSG-derived reference-standard labels, strict temporal synchronization, and multimodal features. The database will support the development, optimization, and validation of sleep-staging and obstructive sleep apnea (OSA)-screening models and will provide a data and modeling foundation for subsequent smart sleep-monitoring products, home-based sleep-health management, and clinically assisted screening applications.

Prevalence of Non-alcoholic Fatty Liver Disease Among Non-obese Obstructive Sleep Apnea by Using Transient Elastography

Obstructive sleep apnea (OSA) and non-alcoholic fatty liver disease (NAFLD) are both common diseases related to metabolic diseases with potential cardiovascular consequences and liver complications respectively. Though studies show OSA may take part in the progression of hepatic steatosis, the independent contribution of OSA on liver fat accumulation is unknown. It is hypothesized that nocturnal intermittent hypoxia from OSA is the main driver of NAFLD in non-obese OSA patients. This study is to assess the effect of OSA on NAFLD in non-obese patients.

Virtual Surgery of the Upper Airways

Obstructive sleep apnea (OSA) is a sleep related breathing disorder caused by repetitive collapses of the upper airways resulting in impaired breathing, oxygen desaturation and sleep disturbances. OSA has a massive impact on global health contributing directly to cardiovascular diseases, insulin resistance, metabolic syndrome and daytime fatigue and is repeatedly associated with an increase in motor vehicle accidents. The mainstay of treatment is still the use of positive airway pressure or surgery of the upper airways, but the success rate is persistently low. Surgery may be of help, but there is a lack of patient-specific options in both diagnostics and treatment. Mathematical and computational modeling is expected to provide significant insight into the airway function and onset of OSA. This study is part of a project that will rely on biomedical engineering to obtain the required insight to produce software tools for computer-aided diagnostics and treatment of OSA.

Effects of CPAP Therapy on Blood Pressure and Heart Rate Variability in Obstructive Sleep Apnea

The primary objective of this study is to determine whether the effect of continuous positive airway pressure (CPAP) therapy on 24-hour mean blood pressure (BP) in patients with obstructive sleep apnea (OSA) varies between symptom phenotypes.

A Study of Eloralintide (LY3841136) in Participants With Obstructive Sleep Apnea and Obesity or Overweight

The purpose of the studies is to evaluate the efficacy and safety of eloralintide in participants with moderate-to-severe obstructive sleep apnea and obesity or overweight. YDAO is a master protocol designed to support two independent studies: YSA1 and YSA2. Study YSA1 will include participants who are unable or unwilling to use Positive Airway Pressure (PAP) therapy and study YSA2 will include participants who are on PAP therapy for at least 3 months at time of screening and plan to continue PAP therapy during the study. Participants will be assigned to the Intervention-Specific Appendix (ISA) that reflects their current PAP usage. Participation in the study will last about 76 weeks.

Intermitent Hypoxia and Its Pathophysiology Consequences in the Sleep Apnea-Hypopnea Syndrome.

Clinical trial on the effect of continuous positive pressure (CPAP). Objectives: 1) To assess the total or partial recovery of oxidative and inflammatory damage after recovering IH. 2) To check whether the results obtained in vitro on the recovery of the damage according to the form of manifestation of IH are validated in SAHS patients. 3) To determine if CPAP reduces nighttime blood pressure and arterial stiffness depending on whether or not patients have a non-dipping pattern of blood pressure and depending on the degree of correction of IH. 4) To clarify whether residual nocturnal hypoxemia influences the recovery of oxidative and inflammatory damage in patients. 5) To determine nasal and intestinal microbioma and the effect of CPAP treatment

Is Change in Mouth Opening Related to Change in Quality of Life in Children With Type 1 Obstructive Sleep Apnea After Adenotonsillectomy?

The goal of this clinical trial is to learn if changes in quality of life are linked to changes in mouth opening after adenotonsillectomy in a group of children who were diagnosed with Type 1 Obstructive Sleep Apnea (OSA1). The main questions it aims to answer are: Primary Objective: •Are changes in quality of life linked to improvements in mouth opening after adenotonsillectomy? Secondary Objectives: * How does quality of life change after adenotonsillectomy, based on different questionnaires about the child's sleep, breathing, behavior, and emotions? * Is there a link between changes in quality of life and changes in mouth movements after adenotonsillectomy? * Is there a link between changes in quality of life and changes in sleep quality after adenotonsillectomy? * How do clinical symptoms change after adenotonsillectomy? * Are measures of mouth movements linked to measurements of sleep quality after adenotonsillectomy? Participation will require: * Participating children will have adenotonsillectomy surgery, as suggested by their doctor * Before and after tonsillectomy, parents of participating children will answer questionnaires related to their child's quality of life and their child's symptoms related to sleep, breathing, behavior, and emotions * Sleep quality and mouth opening will be evaluated in participating children before and after tonsillectomy

Use of Passive Myofunctional Appliances for Snoring and Mild Obstructive Sleep Apnea

It is unknown whether passive myofunctional appliances can be used for the treatment of obstructive sleep apnea and snoring, nor how to select the appropriate size per individual patient. Exploring the possibility of using passive myofunctional appliances as a treatment option for patients with mild obstructive sleep apnea and/or snoring should be considered, especially as the time to fabricate and deliver custom designed dental sleep appliances can be significant (sometimes over a month). Use of passive myofunctional appliances as a transitional appliance or potentially as direct treatment for obstructive sleep apnea may significantly decrease time to treatment and also provide a less expensive treatment option for patients with obstructive sleep apnea. The purpose of this study is to determine whether passive myofunctional appliances can be used as a treatment option for patients suffering from snoring and mild obstructive sleep apnea (OSA).

Real-World Performance and Safety of Apneal Dx for Sleep Apnea Screening

Sleep apnea-hypopnea syndrome (SAHS) is a frequent and largely under-diagnosed sleep-related breathing disorder. Adult prevalence is estimated between 9% and 38%. Untreated SAHS increases cardiometabolic and neurocognitive risk. Reference diagnostic methods (in-lab polysomnography and ambulatory ventilatory polygraphy) have limited capacity, which delays care. Apneal Dx is a Class IIa software as a medical device (CE-marked 10 June 2026). It measures cardiorespiratory sleep activity using the sensors of a standard smartphone worn on the chest, with no additional sensor, to screen for and aid in the diagnosis of adult obstructive sleep apnea-hypopnea syndrome at home. This study is a non-interventional, prospective, real-world post-market clinical follow-up (PMCF) of Apneal Dx used within its intended purpose in routine care. It does not add any examination, visit, randomisation or change to patient management. Data are collected from automatic device logs and optional in-app questionnaires completed by patients and healthcare professionals. The study covers France, Spain, Italy, the United Kingdom and Germany. There is no investigational site and no principal investigator.

KPAP vs AirSense 11 With EPR

The KPAP vs AirSense 11 with EPR study is a randomized, crossover study in which treatment efficacy will be compared between SleepRes APAP + KPAP and ResMed APAP + EPR. Participants will be chosen from those with a formal OSA diagnosis (following an in-lab polysomnogram, a split-night study or a home sleep apnea test) within the past 2 years and on PAP therapy. Upon signing an informed consent, participants will be randomized to the order of study and which device will be used first: APAP + KPAP (delivered by a SleepRes device) or APAP + EPR (delivered by a ResMed device). Participants will be blinded to the sequence order. They will then be invited to the laboratory for two overnight sleep studies, one on each treatment device, in the order determined by the randomization. Prior to each overnight, they will have to observe withdrawal of their home PAP treatment for 3 nights. The KPAP drop will be set to the maximum level (i.e., 5 cmH2O), while EPR will be set on 3. APAP from both manufacturers will be set on a 5-20 cmH2O pressure range. The next morning of each sleep study, participants will be administered visual analog scale (VAS) questionnaires to examine subjective sleep quality (1=best sleep quality; 10=worst sleep quality) and, after all studies are completed, a device subjective preference (1=APAP+KPAP was extremely better than APAP+EPR; 10=the opposite). The study will be single blinded with both the participants (the device will be concealed in the laboratory so that participants will not be able to understand what treatment they are on) and the registered technician scoring the polysomnograms (by an independent scoring partner, Sleep Strategies) blinded to treatment allocation.

Evaluating the Diagnostic Efficacy of Smartwatch and Smartphone for Sleep Apnea

The purpose of this study is to evaluate the diagnostic value of smartphones and watches for OSA screening. The study will be conducted in individuals suspected of having OSA. Subjects will undergo "gold standard" PSG assessment (overnight polysomnography with staff supervision) in a sleep monitoring room, while wearing a smartwatch and smartphone for monitoring. The results will be compared to evaluate the diagnostic value of smartwatches and smartphones for OSA.

Drug-Induced Sleep Endoscopy for Upper Airway Evaluation in Obstructive Sleep Apnea

Prospective, interventional cohort study of drug-induced sleep endoscopy (DISE) to evaluate the upper airway in a cohort of obstructive sleep apnea (OSA) surgical patients. This study has investigated the reliability of this technique, demonstrating moderate-substantial interrater and test-retest reliability. This research has also compared DISE findings to those of the lateral cephalogram X-ray and examined DISE findings in individuals who have not responded to previous sleep apnea surgery. These papers have been published and available through PubMed. Additional research is ongoing, with examination of DISE findings, comparison to other evaluation techniques, and the association between DISE findings and surgical outcomes.

Do Endotypes Predict Response and Sequelae in OSA Patients

This study will investigate why some people have Obstructive Sleep Apnea (OSA) and how the underlying cause may relate to OSA manifestations (including sleepiness and high blood pressure) and response to different therapeutic approaches (ie CPAP, eszopiclone, and supplemental oxygen). Understanding why someone has OSA could affect how best to treat that individual, but may also have an impact on what problems the disease might cause.

Pragmatic Obstructive Sleep Apnea Weight Loss Trial Assessing Effectiveness and Reach

Prevalent obesity related conditions like obstructive sleep apnea (OSA) represent an important opportunity to improve population health. OSA reduces quality of life and is associated with greater risk for cardiovascular disease. Although obesity is the single greatest reversible risk factor for OSA, patients with OSA and obesity rarely receive weight loss care to reverse OSA and other serious comorbidities. Efficacy trials reinforce that time and resource intensive lifestyle-based weight loss programs improve weight and physiologic measures of OSA severity (apnea hypopnea index, AHI). However, there are barriers to translating these findings into meaningful gains for population health. To meet these challenges, the investigators propose a pragmatic trial of proactively offering a remote video-based and self-directed lifestyle-based weight loss intervention with remote coaching to patients with OSA. The investigators primary aim is to test the effectiveness of a proactively delivered and pragmatic lifestyle intervention to improve co-primary endpoints of sleep-related quality of life and weight among patients with OSA and obesity. Secondarily, the investigators will compare additional outcomes between groups including cardiovascular risk scores, sleep symptoms, AHI, well-being, and global ratings of change. Finally, the investigators will also conduct an implementation process evaluation informed by the RE-AIM framework to identify barriers and facilitators to widespread implementation. The investigators will identify patients with OSA and obesity nationwide (n=696) in VA using data from the VA's Corporate Data Warehouse (CDW), and the investigators will contact potentially eligible patients. After confirming eligibility and consent, the investigators will randomly assign subjects to receive the study's lifestyle intervention or usual care alone. The study uses CDW to assess weight change. Subjects will complete questionnaires at baseline at 3, 12 and 21 months after randomization. The lifestyle intervention in POWER focuses on gradual lifestyle behavior change aimed at improving eating habits and increasing physical activity. It encourages participants to gradually achieve and maintain a 5-10% loss of baseline body weight and at least 150 minutes of moderate-intensity physical activity, such as brisk walking, each week. The lifestyle intervention program consists of watching one video, completing corresponding written self-guided learning materials, and tracking food intake and physical activity each week for the first 12 weeks, then working through 10 additional written handouts and continued food and activity tracking for the next nine months. Intervention participants will have access to a lifestyle coach as desired for the full 12-month intervention period.

A Study to Investigate the Feasibility and Respiratory Effects of Stimulating Two Functional Targets (Neural and/or Muscular) for the Treatment of Obstructive Sleep Apnea

This proof-of-concept study is to collect acute and short-term sub-acute (if applicable) changes in respiratory parameters following the percutaneous placement of electrode arrays. Acute placement and data collection will be conducted while performing a Drug Induced Sleep Endoscopy (DISE) where the goal will be to quantify changes in airflow with stimulation. Data will also be collected during a one- or two-night polysomnography (PSG) to investigate airflow and sleep stability responses with and without different levels of stimulation during sleep. Where feasible, OSA severity data will be collected, as measured via the apnea/hypopnea index (AHI) with stimulation versus without stimulation as a secondary objective. Both data collections will be done when stimulating the hypoglossal nerve (HGN) or Genioglossus muscle (GG) and a second functional target (Ansa Cervicalis - AC) or the strap muscles (sternohyoid and sternothyroid) with a set of electrode arrays either in combination or separately.

Evaluation of Hypoglossal Nerve Stimulation in Humans With Obstructive Sleep Apnea

This proof-of-concept study is being performed to evaluate whether the hypoglossal nerve can be stimulated using a small series of electrodes placed surgically via a percutaneous approach. Minimally invasive off the shelf medical devices will be used and observation of the characteristic physiological responses to stimulation of the HGN, will be assessed.

Evaluation of the Effects of Hypoglossal Nerve Stimulation in Humans With Obstructive Sleep Apnea

This proof-of-concept study is being performed to evaluate whether the hypoglossal nerve can be stimulated using a small series of electrodes placed surgically via a percutaneous approach. Minimally invasive off the shelf medical devices will be used and observation of the characteristic physiological responses to stimulation of the HGN, will be assessed.

Validation of a Novel Device for Screening Patients With Symptoms of Obstructive Sleep Apnea

The purpose of this study is to evaluate the sensitivity and specificity of the Belun Ring Pulse Oximetry system for screening of obstructive sleep apnea (OSA) in adults during standard polysomnography sleep study conditions. The primary outcome metric is the Apnea-Hypopnea Index (AHI). The goal, in its entirety, is to evaluate the performance of the Belun Ring Pulse Oximeter during a standard polysomnography sleep study and its ability to compare to the determined Apnea-Hypopnea Index (AHI) of the subjects. It is expected that the Belun Ring Pulse Oximeter will adequately record SpO2, pulse rate, body position and heart rate variability throughout the duration of the study.

Benefits of Oxytocin in Obstructive Sleep Apnea (OSA) Patients Using Continuous Positive Airway Pressure (CPAP) Machine

This study will investigate if an intra-nasal nose spray of the drug oxytocin can decrease the amount of pressure needed from the automatic Continuous Positive Airway Pressure (CPAP) device while sleeping decreasing some of the harmful effects of low oxygen in people with sleep apnea. This study will last 35 nights and involves spending three nights in the sleep lab at George Washington University. There are no additional costs to participants and no compensation for being involved in the study.

Home Apnea Testing in CHildren Trial

This clinical trial will compare home sleep apnea testing with the gold standard in-lab polysomnography in terms of 1) accuracy, 2) therapeutic decision-making, and 3) parent/child acceptability in children referred for evaluation of obstructive sleep apnea.

Impact of the Mandibular Advancement Device on Sleep Apnea During CPAP Withdrawal

Obstructive sleep apnea hypopnea syndrome (OSAS) is a frequent disease with neuropsychological and cardiovascular (CV) consequences. Continuous positive pressure (CPAP), the main treatment for OSAHS, is effective on the majority of symptoms but restrictive, which can promote non-compliance. Treatment interruptions are often observed in connection with intercurrent events such as nasal obstructions or even when patients are on the move. However, randomized trials have shown that stopping treatment, even for a short time, leads to a recurrence of symptoms and significant CV disturbances (increase in blood pressure, endothelial dysfunction, cardiac repolarization disorders). It seems important to consider strategies that promote therapeutic continuity. The mandibular advancement device (MAD) is an interesting tool in this regard. MAD is as effective as CPAP on symptoms and CV data. The investigators want to assess its effectiveness as a complementary treatment during treatment discontinuation on the main consequences of OSAHS.

High-Intensity Progressive Inspiratory Muscle Training in Class III Obesity and Obstructive Sleep Apnea

The purpose of this study is to evaluate the feasibility and effects of a 12-week high-intensity progressive Inspiratory Muscle Training (IMT) program in individuals with Class III obesity (BMI ≥ 40 kg/m²) and obstructive sleep apnea (OSA). Using a single-case experimental design (SCED) with multiple baselines, the study will investigate whether this respiratory intervention can reduce the severity of sleep apnea, as measured by the Apnea-Hypopnea Index (AHI), and improve inspiratory muscle strength and sleep quality. Participants will perform daily training sessions using a resistive loading device (POWERbreathe), with intensity progressing from 40% to 90% of their maximum inspiratory pressure.

Nasal vs Oral Breathing in Drug Induced Sleep vs Natural Sleep

This project will provide important new information regarding (1) the relationship between route of breathing and airway collapsibility and (2) whether route of breathing during DISE (Drug-Induced Sleep Endoscopy) is representative of natural sleep.