1. Why is pediatric pneumonia usually treated with infusion? Pneumonia is a common and frequent disease in children, and is one of the leading causes of death in children. Children’s immune function is not fully developed, and the local immunity of the respiratory tract is significantly weaker than that of adults, so a respiratory infection that is trivial for adults can easily cause pneumonia in children, and pneumonia in children that is not effectively treated can lead to serious complications such as abscessation of the chest, pulmonary blister, and can also be complicated by heart failure, respiratory failure, and other life-threatening conditions. Therefore, pneumonia in children is more dangerous than pneumonia in adults, and treatment should be more aggressive. Most children choose infusions because the absorption rate of drugs via intravenous infusion is 100%, which can kill germs faster and better, and they can be hydrated with water, glucose and electrolytes to compensate for the lack of nutrient intake during pneumonia in children due to decreased appetite. The drawbacks of oral medication are: a. The drug is not completely absorbed by the gastrointestinal tract, and after absorption, it has to be metabolized by the liver, so that only 50 to 80% of the drug’s effect is lost in the bloodstream. The actual antibiotics are not available in the same oral dosage form and must be used intravenously. The actual antibiotics are not only the same as the oral antibiotics, but also the same as the intravenous antibiotics. Fourth, the gastrointestinal reaction to the drug, the taste is not good, the child’s compliance is poor. The use of oral medication may not be controlled, but rather aggravated, and finally have to be infused, which is not worth the loss. Therefore, in order to avoid a series of serious consequences when pneumonia is not effectively controlled, infusion treatment is generally used. 2. How to choose drugs for pneumonia? The causes of pneumonia include bacteria, viruses, mycoplasma, fungi and other pathogens. The majority of common mild pneumonia is caused by viruses and bacteria, but the majority of severe pneumonia is caused by bacterial infections or a combination of bacterial infections on top of viral infections and requires antibiotic treatment. The principle of pneumonia treatment is to select drugs according to different pathogens: 1, bacterial pneumonia: mostly penicillin or cephalosporin; severe drug resistance with imipenem, vancomycin, etc. 2, viral pneumonia: there is no ideal antiviral drugs, is generally the choice of Chinese preparations, ribavirin, adenosine, interferon, etc. 3, Mycoplasma pneumoniae pneumonia: macrolide antibiotics such as erythromycin, azithromycin, etc. should be preferred. 4, fungal pneumonia: with amphotericin, voriconazole, fluconazole, etc. Although theoretically, the treatment is divided into pathogens, but in actual clinical work, due to the limited means of detection or test results are difficult to return quickly, doctors are difficult to completely distinguish the pathogens of children, and even ultimately can not determine the pathogenic bacteria, so in the beginning of the empirical treatment will use both bacterial and viral methods, mycoplasma results and then decide whether to add azithromycin or erythromycin treatment, if sputum culture out If the sputum culture shows bacteria, the decision to change antibiotics will be based on the drug sensitivity results. If the pathogenic bacteria are not detected by sputum culture several times and the current antibiotic treatment is not effective, the doctor will have to change the antibiotic based on experience, and if it is also combined with tuberculosis infection or fungal infection, the diagnosis and treatment will be more difficult.