患儿男,70 min,以“早产儿,反应差70 min”入院。胎龄28周,出生体重1300 g,Apgar评分1 min7分,生后即刻预防性应用肺表面活性物质。查体:早产儿貌,胎龄评估31~32周,R 45次/min,双肺呼吸音粗,心音稍低钝,律齐,未闻及杂音,腹部、神经系统无异常。入院后行鼻塞呼气末正压通气、镇 Children male, 70 min, “premature children, poor response 70 min ” admission. Gestational age 28 weeks, birth weight 1300 g, Apgar score 1 min 7 points, immediately after birth, prophylactic use of pulmonary surfactant. Physical examination: prematurity appearance, gestational age assessment of 31 to 32 weeks, R 45 times / min, lung breath sounds coarse, heart sounds slightly blunt, regular Qi, no smell and noise, abdomen, nervous system no abnormalities. After admission, nasal obstruction end expiratory pressure ventilation, the town