Acoustic Pharyngometry in Obstructive Sleep Apnea Syndrome Patients, With Indication of Continuous Positive Air Pressure
This trial is active, not recruiting.
|Condition||obstructive sleep apnea syndrome|
|Sponsor||University of Sao Paulo General Hospital|
|Start date||May 2009|
|End date||December 2010|
|Trial size||50 participants|
|Trial identifier||NCT01210703, AcPh.1|
Acoustic Pharyngometry (AP) is a method of measurement of Transversal Sectional Areas (TSA) and Volumes of oral cavity and pharynx, based on acoustic waves. The aim of this study is to describe changes on oropharynx dimensions caused by CPAP (Continuous Positive Air Pressure) in patients with severe Obstructive Sleep Apnea Syndrome when compared with patients with Primary Snore, using AP. The exam will be made during the use of CPAP, at various pressures. The investigators also intend to determine if pressure determined by Polysomnography in OSAS patients cause some type of different change in AP graphic.
|Observational model||case control|
Male or female participants from 18 years up to 65 years old.
- Age: 18 - 65 years old
- Female and male
- Chronic nasal obstruction
- Using neurologic or psychiatric drugs
|Official title||Evaluation of Effect of Continuous Positive Air Pressure (CPAP) on Upper Airway Dimensions, by Acoustic Pharyngometry (AP), in Severe Obstructive Sleep Apnea Syndrome (OSAS) and Primary Snore Patients|
|Principal investigator||Claudia Inês G de Sousa Silva, Md|
|Description||The investigators are performing AP exams in severe apneics (cases) and primary snorers (control group),first basal, and then at the same time of using CPAP with a nasal mask, at progressive pressures (from 4 to 10 cmH20 in snorers, and until 2 pressures above the polysomnography determined pressure in apneics). The wave tube of pharyngometer is connected to the patient´s mouth by a mouthpiece, and to the computer. It makes a graphic of area x distance for each measurement. Then the investigators compare the changes in area, distance and volume of oral cavity and pharynx, determined by CPAP pressures, in both groups, and compare the measurements inside each group and between the two groups. Finally, the investigators analyse the CPAP pressure that most modifies the AP graphic, observing if it has some relationship with the polysomnography determined CPAP pressure. The investigators intend this way to show the kind of modifies determined by CPAP in oral cavity and oropharynx and, secondarily, observe some relationship of AP and polysomnography in determine the CPAP ideal pressure for severe apneic patients.|
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