Validation of a portable monitoring system for the diagnosis of obstructive sleep apnea syndrome.

Study Objective: To evaluate if a portable monitor could accurately measure the apnea-hypopnea index (AHI) in patients with a suspicion of obstructive sleep apnea (OSA).

Design: Prospective and randomized.

Setting: Sleep laboratory.

An orientation session improves objective sleep quality and mask acceptance during positive airway pressure titration.

The aim of this study was to determine whether an orientation session led by a polysomnography (PSG) technician during the night of positive airway pressure (PAP) titration can improve objective sleep quality and acceptance of nasal mask in patients referred to a sleep laboratory. Consecutive patients (n = 1,481), referred for PAP titration during PSG, were retrospectively evaluated. Patients were distributed in two groups: the control group, patients referred for PAP titration (n = 699) who did not undertake an orientation session led by a PSG technician, and the oriented group, patients referred to PAP titration (n = 782) who followed the orientation session.