[Sleep apnea syndrome (SAS)].

In recent years, there has been rapid progress in the pathophysiology, diagnostic methods and therapeutics of sleep apnea syndrome (SAS). In this article, we present our findings in these fields for the past several years. Recently, we have been able to use ultralow-field magnetic resonance (MR) fluoroscopy to visualize the upper airway for extended periods of time. The severity of SAS should be evaluated by precise history taking, physical and laboratory examination and polysomnography together with SpO2 and esophageal pressure monitoring. Treatment strategy includes multidisciplinary approaches, life style modification and suitable treatment choice, such as CPAP, dental appliance, upper airway surgery, pharmacological agents.