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呼气末正压通气(PEEP)为机械呼吸器在吸气相产生正压、气体进入肺部,在呼气末气道开放时、气道压力仍保持高于大气压的一种机械通气类型。1969年 Ashbaugh 等首先确认了 PEEP 治疗成人呼吸窘迫综合症(ARDS)的作用,主要在于防止肺泡塌陷和肺不张、改善 V/Q 比值、降低肺内分流,因而增加PaO_2、降低吸氧浓度以减少氧中毒的危险性。临床上早期常用中等或低水平的 PEEP
Positive end expiratory pressure (PEEP) is a type of mechanical ventilation in which the mechanical respirator creates a positive pressure in the inspiratory phase and the gas enters the lungs and the airway pressure remains above atmospheric at the end of expiratory airway opening. In 1969, Ashbaugh et al. First confirmed the role of PEEP in the treatment of adult respiratory distress syndrome (ARDS), mainly in preventing alveolar collapse and atelectasis, improving V / Q ratio and reducing pulmonary shunt, thus increasing PaO 2 and decreasing oxygen concentration Reduce the risk of oxygen poisoning. Commonly used in clinical early or low level of PEEP