患者、男,59天,足月顺产,人工喂养。3天前洗澡受凉后阵发性干咳,不烧,精神可,进奶好,以“感冒”口服麦迪霉素一天,咳加重,伴呕吐奶汁,精神转差。4小时前呼吸变急促,面色青灰。查体:T36.2℃,P162次/分,R56次/分,体重4kg,精神萎靡,呼吸浅快,节律不齐,口唇口周明显发绀,鼻翼扇动,三凹征(+),咽稍红,双肺呼吸音粗,可闻及密集中小水 Patient, male, 59 days, full term spontaneous, artificial feeding. Paroxysmal dry cough after bathing cold 3 days ago, do not burn, the spirit can be, into the milk is good, with a “cold” oral midecamycin day, cough aggravating, with vomiting milk, mental deterioration. 4 hours ago, rapid breathing, looking blue. Physical examination: T36.2 ℃, P162 beats / min, R56 beats / min, weight 4kg, apathetic, shallow breathing, irregular rhythm, obvious cyanosis of the mouth and mouth, nose flap, Red, lung breath sounds crude, can be heard and intensive small water