肺炎是小儿尤其是婴幼儿的多发病。由于婴幼儿解剖生理的特点,如胸廓圆而短,常处于吸气的状态;肺脏弹力纤维发育未成熟;血管丰富而易充血;免疫机能未成熟等,易患肺炎。患肺炎后,由于病原体毒素的作用,加上呼吸器官解剖生理功能未完善,受损害的不仅仅是肺脏本身,而且往往累及肺以外的器官系统,出现严重的症候群如呼吸衰竭、肺炎心力 Pneumonia is a common occurrence in infants, especially infants and young children. Due to the characteristics of infant anatomy and physiology, such as round and short thorax, often in the inspiratory state; lung elastic fiber immature; vascular rich and easy to congestion; immune function immature, susceptible to pneumonia. After suffering from pneumonia, due to the action of pathogenic toxins and the imperfect anatomical and physiological functions of respiratory organs, not only the lung itself is damaged, but also organ systems outside the lung are often impacted. Serious syndromes such as respiratory failure and pneumonia