下呼吸道感染性疾病是小儿多发病，尤其是婴儿多见，往往需住院综合治疗。超声雾化吸入辅助治疗下呼吸道感染已被广泛应用于临床。我院常规使用生理盐水。庆大霉素、地塞米松。一糜蛋白酶组成的雾化液，作用肯定。为了提高疗效，我们在普通雾化液中加用爱喘乐（Atrovent）超声 Lower respiratory tract infection is more common in children, especially infants more common, often need to be hospitalized comprehensive treatment. Ultrasound nebulization of adjuvant treatment of lower respiratory tract infection has been widely used in clinical. Our hospital routine use of saline. Gentamicin, dexamethasone. A composition of chymotrypsin emulsion, the role of affirmation. In order to improve the curative effect, we add Atrovent ultrasound to common nebulizer