Clinical Research Directory

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.

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.

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.

NPA-OSA Device Tolerability, Usability and Acclimation Clinical Study in Adult Obstructive Sleep Apnea (OSA) Patients

This pilot study is being done to determine if the nasopharyngeal airway obstructive sleep apnea (NPA-OSA) device can be used in the treatment of OSA in adults. The researchers think that the NPA-OSA device will reduce the number of apneas.

Maxillomandibular Advancement Surgery for Treatment of Obstructive Sleep Apnoea Syndrome

This study looks at how jaw surgery called maxillomandibular advancement with counterclockwise rotation affects breathing during sleep in people with moderate to severe obstructive sleep apnea who cannot tolerate standard treatments such as Continous Positive Airway pressure treatment. The participants are followed over time to see whether the surgery improves sleep apnea symptoms, daytime sleepiness, and airway size, and whether these improvements last. Advanced three-dimensional imaging and airflow analysis are used to better understand how the surgery changes the airway and breathing. The goal is to evaluate the long-term effectiveness and safety of this surgical treatment.

Lateral Pharyngoplasty Outcomes in Children Undergoing Tonsillectomy

The goal of this treatment study is to determine if doing lateral pharyngoplasty with tonsillectomy is better for children than doing tonsillectomy alone. The main questions it aims to answer are: * Do children experience less pain after surgery when lateral pharyngoplasty is performed with tonsillectomy compared to tonsillectomy alone? * Do children eat/drink better when lateral pharyngoplasty is performed with tonsillectomy compared to tonsillectomy alone? * Is there a lower risk of bleeding after tonsillectomy when lateral pharyngoplasty is performed? Researchers will compare children undergoing tonsillectomy and lateral pharyngoplasty with children undergoing tonsillectomy alone to see if the participants experience less pain, better oral intake, and less bleeding complications after surgery. Parents of participants will be asked to record pain scores and pain medications given, approximate amounts of daily oral intake, and any complications after surgery.

The REPOSE (Reach for Equity in Pediatric Sleep Evaluation) Navigation Intervention

This research study aims to find out the effect of REPOSE, a patient navigation intervention, on the receipt of equitable care among children with a broad range of socioeconomic and rural/urban status with Sleep Disordered Breathing (SDB). In the REPOSE intervention, a centralized patient navigator a) identifies and addresses dynamic individual barriers, b) provides resources and social support for parent-child dyads, and c) facilitates bidirectional SDB care coordination between clinical teams and parents to achieve evidence-based care. This study will evaluate the effects of the REPOSE intervention on SDB care delivery and clinical process outcomes for children with a broad range of socioeconomic and rural/urban status by reducing barriers and increasing self-efficacy among parents.

Sleep for Stroke Management and Recovery Trial

The purpose of this study is to determine whether treatment of obstructive sleep apnea (OSA) with positive airway pressure starting shortly after acute ischemic stroke (1) reduces recurrent stroke, acute coronary syndrome, and all-cause mortality 6 months after the event, and (2) improves stroke outcomes at 3 months in patients who experienced an ischemic stroke.

Type 1 Diabetes and Obstructive Sleep Apnea

The purpose of the study is to investigate the role of sleep apnea in glycemic dysregulation in adults with Type 1 diabetes.

Accuracy of the Sensory Test Using the Laryngopharyngeal Endoscopic Esthesiometer in Obstructive Sleep Apnea

This is a prospective double blinded randomized crossover controlled trial aiming at validating the measurement of laryngopharyngeal mechanosensitivity in patients with suspected OSA using a recently developed laryngopharyngeal endoscopic esthesiometer and rangefinder (LPEER). Subjects will be recruited from patients with suspected OSA referred for baseline polysomnography to a university hospital sleep laboratory. Intra- and inter-rater reliability will be evaluated using the Bland-Altman's limits of agreement plot, the intraclass correlation coefficient, and the Pearson or Spearman correlation coefficient, depending on the distribution of the variables. Diagnostic accuracy will be evaluate plotting Receiver-operating-characteristic-curves (ROC-curves) using as reference standard basal polysomnogram. The sensory threshold values for patients with mild, moderate, and severe OSA, will be determined and compared using ANOVA or Kruskal Wallis test, depending on the distribution of the variables.

Predicting Outcomes in Hypoglossal Nerve Stimulation Therapy With Stimulated Upper Airway Mechanics

Obstructive sleep apnea (OSA) is a highly prevalent disease resulting from dynamic upper airway collapse during sleep. Continuous positive airway pressure (CPAP) is highly efficacious but high rates of non-adherence to CPAP leaves large number of OSA patients at risk for cardiometabolic sequelae. Inspire™ is an FDA-approved hypoglossal nerve stimulation device (HGNS) used in select patients with OSA who are intolerant of CPAP. The device consists of an implanted impulse generator with a stimulating cuff lead around the distal hypoglossal nerve. Despite these stringent selection criteria, up to one-third of patients implanted have inadequate responses to HGNS and remain at risk for complications from untreated OSA. The current proposal builds on routine clinical care to characterize upper airway biomechanics and determine predictors of clinical responses to HGNS therapy. Drug induced sleep endoscopy (DISE) is a prerequisite for HGNS treatment and represents an ideal opportunity to rapidly characterize upper airway dynamics under controlled, standardized conditions. The amount of nasal pressure required to relieve airway obstruction (minimal therapeutic pressure) is a significant predictor of successful treatment of OSA with HGNS. As a result, CPAP titration (measuring pharyngeal collapse patterns at varying nasal pressures) has become an integral part of DISE to select parties for HGNS at multiple institutions. Nevertheless, changes in upper airway collapsibility in response HGNS may differ significantly between patients. This stud will examine if changes in upper airway patency with direct genioglossus muscle stimulation at the time of DISE predicts successful treatment with HGNS as defined by a 50% reduction on apnea-hypopnea index (AHI) and an on-treatment AHI \<20.

Long-term Evaluation of a Nasopharyngeal Airway

This long-term follow-up study will permit continued device use for participants of the parent study (NCT06677151). During study participation the study team will stay in contact with participants as necessary. Additionally, patients will undergo clinical follow-up as needed with their physician(s). At 12 months, participants will complete sleep questionnaires as part of this long-term follow-up period.

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

The IPAD Cohort Study: Insomnia and Positive Airway Pressure Adherence in Children and Adolescents

Positive Airway Pressure (PAP) is a treatment used to help people with sleep-disordered breathing, particularly those with obstructive sleep apnea (OSA). The device delivers pressurized air through a mask to keep the airways open during sleep, improving breathing and preventing interruptions in sleep. Studying how insomnia affects PAP adherence in children can help improve future treatments. However, no long-term studies have looked at this in children. Based on previous research, the investigators plan to conduct a study across multiple centers focusing on children with OSA starting PAP therapy. The study will explore how insomnia affects PAP adherence and how race and ethnicity play a role.

CPAP Effect on the Polycythemia in Patients With Obstructive Sleep Apnea

Objectives: To compare the response of polycythemia in terms of hematocrit decrease in patients treated with positive airway pressure (CPAP) versus patients not treated with CPAP. Methodology: Randomized, parallel-group, nonblinded, controlled clinical trial. Patients diagnosed with OSA in a respiratory polygraphy (RP) and who meet all the inclusion criteria and none of the exclusion criteria will undergo sleepiness and quality of life questionnaires, anthropometric measurements and blood tests and will be randomized to a CPAP treatment group or control group, maintaining this treatment for 12 months. A visit will be made at 12 weeks ,24 weeks and 52 weeks to check compliance with CPAP in the treatment group and to carry out questionnaires on physical activity and quality of life, anthropometric measurements, blood tests including hemoglobin and hematocrit as well as parameters related to coagulation and platelet function and changes in medication as well as adverse effects. Efficacy variables: blood count, hemoglobin, haematocrit, erythropoietin, mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH), mean corpuscular haemoglobin concentration (MCHC), mean platelet volume (MPV), platelets, coagulation, erythrocyte range of distribution (ADE), glucose, creatinine, glomerular filtration rate, aspartate aminotransferase (AST), alanine aminotransferase (ALT), gamma glutamyltransferase (GGT), Total bilirubin, hypoxic burden, Epworth score, EuroQol- 5D questionnaire.

Safety and Effectiveness of the Genio® bilAteral Stimulation for Treatment of Complete Concentric CollapsE and OSA.

The solution offered by the Genio System to treat OSA patients with CCC using bilateral HGNS has a favorable risk-benefit ratio, as demonstrated by evidence from 2 studies.

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).

Assessing the Performance of Wesper Lab for Obstructive and Central Sleep Apnea

The goal of this clinical trial is to evaluate the effectiveness of the Wesper Lab home sleep apnea test as a tool to aid in the diagnosis of sleep apnea in adult patients (age ≥21 years) who are recommended for an overnight polysomnography (PSG) evaluation. The main questions it aims to answer are: 1. Is Wesper Lab home sleep apnea test as accurate as an in-laboratory sleep study (polysomnography) for the diagnosis of obstructive and central sleep apnea? 2. Is Wesper Lab accurate in a wide range of body types and skin types? Participants will: 1. Provide informed consent and complete a brief medical history. 2. Undergo an overnight polysomnography sleep study while wearing two Wesper Lab patches and a compatible pulse oximeter. 3. Have a follow-up communication within 5 days post-study to assess any adverse events.

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.

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.

Effect of CPAP Versus APAP in Patients With Obesity Undergoing Bariatric Surgery Protocol

Introduction Obstructive sleep apnea (OSA) is a common disorder in obese patients, especially those undergoing bariatric surgery. OSA is characterized by upper airway obstruction during sleep, leading to intermittent hypoxia and sleep fragmentation. Obesity and OSA are closely related conditions that can exacerbate each other. Positive airway pressure therapy is essential for managing OSA, but adherence to therapy can be challenging, particularly in patients who experience rapid physiological changes after bariatric surgery. Objective This study aims to determine whether automatic positive airway pressure therapy (APAP) improves nightly usage hours compared to continuous positive airway pressure therapy (CPAP) in obese patients undergoing bariatric surgery. Secondary objectives include evaluating the percentage of nights with therapy use over 4 hours, reduction of the residual apnea-hypopnea index (AHI), changes in daytime sleepiness, pressure requirements, side effects, sleep-related quality of life, reduction in in-person visits, and optimization of healthcare resources. Methodology A randomized, parallel-group, open-label, controlled clinical trial will be conducted. Adult patients eligible for bariatric surgery with a diagnosis of moderate to severe OSA (AHI \> 15) requiring positive pressure therapy will be included. Participants will be randomized to receive either APAP or CPAP. Follow-up will be conducted over 12 months after surgery, with assessments at 3, 6, and 12 months. Data will be collected on treatment adherence, residual AHI, OSA symptoms, daytime sleepiness, quality of life, and treatment costs. APAP therapy is expected to improve nightly usage hours compared to CPAP. It is also expected that APAP will show better adaptation to changing pressure needs after bariatric surgery. Data will be analyzed to evaluate the effectiveness and cost-efficiency of both therapies. This study will provide evidence on the efficacy of APAP compared to CPAP in obese patients undergoing bariatric surgery. The results will help optimize the treatment of OSA in this population and improve patients' quality of life. Additionally, the study is expected to contribute to the optimization of healthcare resources by reducing in-person visits and repeated sleep studies.

Peri-operative BiPAP to Prevent Tracheostomy in High-Risk Bilateral Vocal-Cord Paralysis (BVCP)

Why: After thyroid or neck surgery, some patients can lose movement of both vocal cords (bilateral vocal-cord paralysis, BVCP). This can make breathing difficult and often leads to an emergency or preventive tracheostomy ("wind-pipe") surgery. What: This study will test two simple ways to avoid a tracheostomy: Pre-operative BiPAP sleep training - patients practice sleeping with a non-invasive BiPAP breathing machine for seven nights before surgery so they become comfortable with the mask and pressures. Immediate post-extubation BiPAP support - the same BiPAP machine is started as soon as the breathing tube is removed in the operating room or recovery area. How: Adults (18-80 years) who already have, or are at high risk of getting, BVCP will be randomly assigned to one of four groups in a 2 × 2 design: • Group 1: training + post-op BiPAP • Group 2: training only • Group 3: post-op BiPAP only • Group 4: standard care (no planned BiPAP). Main goal: To find out whether either or both BiPAP strategies reduce the need for tracheostomy or re-intubation during the first 7 days after surgery. What participants do: Eligible patients will undergo routine surgery plus the assigned BiPAP plan. Breathing events, comfort, hospital stay, and voice quality will be recorded up to 6 months. Potential benefit/risk: BiPAP is non-invasive and already FDA-cleared for home and hospital use, but some people may feel mask discomfort or air leaks. Trained staff will adjust settings and stop BiPAP if serious problems occur.

Obstructive Sleep Apnea and Biomarkers of Alzheimer's Disease

Clinical trial on the effect of continuous positive pressure (CPAP). Objectives: 1) To compare biomarkers of Alzheimer's disease in plasma samples from patients with Obstructive sleep apnea (OSA) and without OSA. 2) To determine if CPAP reduces biomarkers of Alzheimer's disease in plasma samples.