An observational study in Obstructive Sleep Apnea Syndrome, sponsored by University of Sao Paulo General Hospital. Status unknown at 1 site in Brazil. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2010-10-15.
Sponsored by University of Sao Paulo General Hospital · Observational
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.
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.
1,422 studies on the registry are indexed under Apnea; 159 are open to participants now.
This study's planned enrollment of 50 is below the median of 106 across 386 observational studies indexed under Apnea.
Browse Apnea studies →University of Sao Paulo General Hospital is the lead sponsor of 595 studies on the registry; 98 are open to participants now.
Of its 8 completed or terminated interventional studies of FDA-regulated products, 0 (0%) have results posted.
Counted across the registry records on this site, refreshed daily.
Patients with Severe Sleep Obstructive Apnea Syndrome and Primary Snorers, who have already made a polysomnography (in apneics, polysomnography for CPAP titulation, too).
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University of Sao Paulo General Hospital