Active clinical trials for "Airway Obstruction"

The aim of this study is to assess the bronchodilator response of salbutamol on respiratory mechanics of healthy individuals, smokers and COPD with varying degrees of airway obstruction.

Patients with OSA receive manometry measurements with Apneagraph (AG) during one night of sleep. All patients are simultaneously evaluated with polysomnography. Patients who are not eligible for CPAP therapy are additionally studied with drug-induced sleep endoscopy (DISE). The frequency and obstructions patterns in different sleep stages are assessed. In addition obstruction patterns detected with AG are compared with DISE examination in the selected cases.

This clinical trial is a monocentric, prospective, observational and controlled trial (historical cohort control group of healthy non-obese subjects who had Nasal functional exploration for Snoring) as part of current care. This study concerns the prevalence of obstructive sleep apnea syndrome (OSAS). OSAS is elevated in subjects with morbid obesity (BMI≥40) (on average 70%). International recommendations agree on the need to seek OSAS before bariatric surgery because of the high risk of complications. Increased nasal resistance could also be related to a limitation of inspiratory flow due to an abnormality of the elasticity of the nasal mucosa or "nasal compliance". Adipose infiltration of the nasal mucosa may occur during obesity. These tissue changes (decreased vaso-erectile tissue and increased adipose tissue) could modify the nasal compliance, which the decrease would be a possible factor of severity of OSAS in obese patients. Screening for an abnormality of compliance could also anticipate a difficulty of equipment for Continuous Positive Airway Pressure (CPAP) in the case of associated OSAS. All patients who must have bariatric surgery and get in the criteria are included. They will have to do a medical checkup pre and post-operative (polygraphy + ear/nose/throat assessment (ENT) + Nasal functional exploration). They will be followed for 13 to 24 months. The main objective of this research is to demonstrate a reduction of at least 30% of nasal compliance in a group of obese subjects (BMI> 35) compared to a control group of healthy subjects. The secondary objectives are to is to demonstrate an increase of 30% in resistance in patients with BMI> 35 compared to control group and a normalization of nasal compliance 1 year after surgery when their weight is normalized (BMI <30). A study period of 4 years is planned.

The purpose of this study is to establish the reference values of impulse oscillometry (IOS) in healthy Chinese, and compare the indices of IOS in patients with lung disease, such as chronic obstructive pulmonary disease (COPD), asthma, interstitial lung disease (ILD), and upper airway Obstruction (UAO).

Currently, there are no tools that can measure nasal airflow in an objective manner that is non-invasive to the patient. This clinical study aims to address this by evaluating the use of thermal imaging as a diagnostic tool for measuring nasal airflow. Proper airflow cools the nasal airway as it passes--obstructions or narrowed airways hinder flow and results in elevated temperatures along the airway and nasal tissue. It is this elevation in temperature, or more specifically, loss of cooling, that we hypothesize to be measurable with thermal imaging. Participants in this study will be asked to perform 3-4 nasal breathing cycles which will be recorded by the thermal imager.

This study is to collect and summarize the cases of airway obstruction after anterior cervical operation through retrospective case analysis, to explore the risk factors of airway obstruction after anterior cervical operation, to provide the basis for the construction of evaluation system and provide reference for the nursing of postoperative complications.

The inclined position at 30 ° in case of transient respiratory discomfort is recommended since the consensus conference of September 2000. This recommendation is based on a low level of evidence (grade C). This advice is found in the health book, and in many tips for parents. However, it does not comply with the recommendations of the American Academy of Pediatrics for sleeping on the back, on a firm mattress and without other objects in the bed. 70% of pediatricians advise this position in a specific medical context according to a study of Bellaïche conducted in 2013. 40% of parents use it for no particular reason. Anatomically, the upper airways of infants are of reduced caliber, and therefore at risk of obstruction. A study by Bergougnioux on the cases of MIN in infants wearing a wrap-around sling shows that the flexion of the neck causes the chin to be positioned against the chest and contributes to the suffocation of the infant. This is especially important in infants under 3 months whose neck muscles do not yet support the weight of the head. The 2009 InVS national survey of unexpected infant deaths shows that bed crashes accounted for 11.1% of all deaths reported. Among unexplained deaths, maladaptive bedding was a contributing factor, including the use of a pillow in the bed in 24.3% of cases. It was observed in the study by Kornhauser Cerar et al in 2009 that half-sitting in a car seat for an extended duration was at the origin of a significant desaturations rate, which was also found in the car bed group. The control group "hospital bed" was not subject to these desaturations. These results support the fact that only an adapted bedding that complies with the recommendations protects against asphyxiation. Since 2016, INPES recommends in its advice sheet on bronchiolitis for parents, a flat bed on the back. Hypothesis : The inclined position in infants under one year of age is at risk of unexpected death of the infant by obstruction of the upper airways, because of the changes of position that it entails, including a risk of slipping at the bottom of the bed and of asphyxiation under the covers.