Abstract: To explore the effects of perioperative continuous positive airway pressure (CPAP) treatment for patients with obstructive sleep apnea hypopnea syndrome(OSAHS). MethodsThirtysix OSAHS patients were subjected to polysomonography(PSG) for preoperative diagnosis and for evaluation of the effect of the CPAP treatment. Two nights PSG results, including sleep architecture, breathing events, oxygen desaturation and arousal were compared. ResultsWith the CPAP treatment, stage 1 sleep was decreased, while stage 3+4 sleep and the REM sleep were significantly increased, also arousals, respiratory events and the degree of oxygen desaturation were significantly decreased. Changes of these parameters among mild, moderate and severe OSAHS patients were statistically different. Local edema and hyperemia in the pharyngeal cavity of OSAHS patients were relieved. No complications of hypertensive crisis happened. ConclusionPerioperative CPAP treatment could effectively decrease the breathing events and oxygen desaturation degree and steady hemodynamics, so as to make patients tolerate surgery and anaesthesia and reduce surgical crisis in the perioperation for OSAHS.

Key words: Sleep apnea, obstructive, Continuous positive airway pressure, Surgery, Perioperation