Ultrasonic nebulization inhalation needs to pay attention to the following four items: First, the choice of drugs should pay attention to the choice of drugs with nebulized inhalation dosage form, commonly used is acetylcysteine, budesonide, ipratropium bromide, salbutamol, can not choose to inject injectable needles for nebulization treatment, because injectable needles contain preservatives, easy to cause deposition or damage to the throat, bronchial tubes, alveoli. Second, ultrasonic nebulization needs to add saline, pay attention to the scale of the nebulizer cup, can not add too much saline, so as to avoid the concentration of the solution is too thin to play a role. Third, ultrasonic nebulization inhalation smoke can not be too large, so as not to cause choking or breathing difficulties. Fourth, do not drink water within twenty minutes after ultrasonic nebulization.