Nebulized inhalation medication is a common treatment for acute attacks of wheezing disease or asthma in children, and its efficacy is rapid and reliable. At present, there are not a few people who own jet nebulization devices (or air compression pumps) at home. For children with asthma, if wheezing occurs again after choosing long-term standardized treatment and stopping the medication, short-term nebulized inhalation treatment can also be given. I. The principle of nebulized inhalation Nebulized inhalation is a sudden decompression of gas through a narrow mouth, and the negative pressure generated locally sucks out the medicine and forms mist particles. Directly inhaled through the mouth and nose into the respiratory system to take effect, more efficient than oral / injection. The size of the drug mist particles is related to the pressure and flow rate of the airflow, and the size of the jet nebulized mist particles is 2-5 um, which can be better deposited in the small airways and play a therapeutic role. Second, the type of nebulizer There are two types of nebulizer on the market: ultrasonic nebulizer and compressed nebulizer, the difference between the two mainly in the size of the nebulized particles. Ultrasonic nebulizer: nebulization volume is large, but the nebulized particles are also relatively large, the general median particle size in about 9 microns. Can not enter the lower respiratory tract, so generally suitable for upper respiratory tract treatment. Compressed nebulizer: The nebulized particles are smaller, generally with a median particle size of 5 microns or less, and can be deposited in the lower respiratory tract, terminal bronchi and alveoli. Therefore, for pediatric patients, it is recommended to use compressed air nebulizer. Pediatric patients have a narrow airway, so in order to deliver drugs into the bronchi, the use of compressed air nebulizer is a better choice. Third, how to choose a nebulizer machine in the choice of nebulizer, must consider several issues: 1, look at the size of the nebulized particles: the particles are too large to enter the lower respiratory tract, can not play a therapeutic effect. 2, noise: the noise level of the nebulizer is an important indicator of its quality, the sound is too small friends will not accept. 3, vibration: along with the noise is vibration, generally speaking, the noise is large, its vibration must not be small. 4, heat: noise, vibration of the machine, its heat must be more, resulting in energy loss, compression atomizer nominal power is not the greater the better. Power but noisy (vibration, heat) of the machine, most of its energy is wasted. 5, portability: as a home when the size of the nebulizer is also a factor that home users need to consider, a smaller size means more convenient to carry. 6, nebulizer cup: after the compressor to meet the basic requirements, the quality of the nebulizer cup is particularly critical. It is best to choose the stock has a patented technology of the atomization cup. This information can generally be obtained from the packaging of the product. Currently on the domestic market, the following brands: (1) Germany Bry-Air The best reputation, medical grade, professional, low noise, but the price is higher, and more bulky, not easy to portable. (2) domestic brands represented by Yuyue, Le Yi, small medical products, the advantage of cheap, convenient to buy, slightly less professional. (3) Omron Omron is also a better brand of medical equipment, between the first two, cost-effective, better portability. Fourth, nebulized inhalation precautions 1, nebulized inhalation need to pay attention to the preparation of drugs or take the drug to thoroughly clean hands, nebulized accepted after the mouthpiece, mask and dosing part of the accessories to rinse clean with water, regular use of special through-needle fluent nozzle. 2.After cleaning and unclogging the nozzle, use physiological saline spray for at least 5 min, and put the mouthpiece and mask in disinfectant solution to soak and disinfect the spare. 3, infants and children with mask drug delivery, the mask should be fastened to the mouth and nose, children over 3 years old try to use the door mouth inhalation, each nebulized suction at least, 10-20 minutes.