Polysomnography Versus Home Sleep Study:Overview and Clinical Application

摘要

Historically, polysomnography (PSG)-or nocturnal, laboratory-based sleep studies-has been the most commonly used test in the diagnosis of sleep disordered breathing. PSG is often considered the criterion standard for diagnosing sleep apnea, determining the severity of the disease, and evaluating various other sleep disorders that can exist with or without apnea. PSG consists of a simultaneous recording of multiple physiologic parameters related to sleep and wakefulness. It can directly monitor and quantify the number of respiratory events and, when scored properly, can determine if the apneic episode is obstructive in nature or derived from a central source, such as the brain or lungs. The resultant hypoxemia and arousals related to the respiratory events are also determined.