对４６例早产儿肺出血的临床分析，认为早产是肺出血的生理性高危因素，严重感染、寒冷损伤、缺氧和酸中毒是肺出血的病理性高危因素，机械通气不当是肺出血的医源性高危因素。根据ＣＰＰＶ评分标准，如分值达４～６分时，应及早使用持续正压通气，并积极治疗原发病，消除肺出血的病理性及避免医源性高危因素。 Premature labor in 46 cases of pulmonary hemorrhage in clinical analysis, that premature labor is a physiological risk factors for pulmonary hemorrhage, severe infection, cold injury, hypoxia and acidosis are pathological high risk factors for pulmonary hemorrhage, inappropriate mechanical ventilation is pulmonary hemorrhage Source of risk factors. According to the CPPV grading standards, if the score reaches 4 to 6, continuous positive pressure ventilation should be used as early as possible and active treatment of the primary disease should be performed to eliminate the pathological features of pulmonary hemorrhage and avoid the iatrogenic risk factors.