Diagnosing sleep apnea requires observation and review of the individual patient’s risk factors. Observation may include a formal sleep study at home or at a sleep study center. Sleep study centers offer the advantage of state-of-the-art diagnostics using polysomnography and/or Home Sleep Testing (HST). A polysomnogram (PSG) test records and measures breathing, brain, muscle, eye, and heart activity during the various stages of sleep. The results of your PSG provide the basis for diagnosing sleep apnea, and, when indicated, classifying the diagnosis as mild, moderate, or severe. Home evaluation uses a method called pulse oximetry. Pulse oximetry measures oxygen levels in the blood. Obstructive sleep apnea sufferers experience reduced blood oxygen levels when sleeping. The diagnostic techniques best suited for your needs will depend on your individual symptoms and risk factors, as determined during your initial consultation with Dr. Sall.