男,18天。因频咳1周,伴气促、阵发性唇周青紫1天入院。起病来无热,来本院门诊就诊时出现阵咳憋气而呼吸暂停,经拍背后好转。否认异物吸入史。G_1,P_1,足月顺产,出生体重3.3kg。母乳喂养,病前无气促及喉鸣。体检:T36.4℃,P140,R40,神清,发育好,反应可,外观无畸形。哭声略嘶 Male, 18 days. Due to frequent cough 1 week, with shortness of breath, paroxysmal lip cyanosis 1 day admission. The onset of fever to come to our hospital outpatient clinic cough breath and apnea, after the film improved. Denied the history of foreign body aspiration. G_1, P_1, term full-term, birth weight 3.3kg. Breastfeeding, premature illness without gas and throat. Physical examination: T36.4 ℃, P140, R40, Shen Qing, good development, the reaction can be, the appearance of deformity. Cries slightly cries