Methods:56 patients who had accepted the mechanical ventilation were divided into CPAP PSV mode group and SIMV PSV PEEP mode group,respectively, based on their spontaneous respiratory abilities.

• 方法:选择56例接受机械通气的急性呼吸衰竭患者,依据自主呼吸能力和上机时机分为CPAP-PSV方式机械通气组和SIMV-PSV-PEEP方式机械通气组,观察两组患者的通气指标、血气变化、预后、脱机率。