Diagnostic methods in obstructive sleep apnea-hypopnea syndrome (OSAHS)

Obstructive sleep apnea-hypopnea syndrome (OSAHS) requires a thorough medical evaluation and diagnosis confirmation, as well as the estimation of its severity using diagnostic means. These conditions are fulfilled by the basal polysomnogram, which monitors sleep throughout the night; this is a standardized study that requires minimum quality parameters that must be met in all cases. The multiple sleep latency test has been standardized with due care and is indicated for quantifying excessive daytime sleepiness. On the other hand, positive airway pressure titration by polysomnography allows to find the minimum therapeutic pressure to correct all obstructive respiratory events. The split-night polysomnogram tries to improve appointment opportunities, which contrasts with the studies mentioned above, since both of them can be done in one night, although, it has its own limitations. Home sleep studies are classified according to their level of complexity and care; they seek to diminish the opportunity of appointments and are considered as screening studies. In addition, the psychomotor vigilance test is used to control therapies focused on improving excessive daytime sleepiness