Pediatric respiratory infections are the most common outpatient and inpatient diseases. Upper respiratory infections are mostly cured in the outpatient clinic, while lower respiratory infections mostly require hospitalization, and pediatric capillary bronchitis and pneumonia are common causes in the inpatient unit. Generally speaking, when children are hospitalized, most parents think that the injection will be good, and some parents even think that only the injection will cure the disease, and some other treatment measures of doctors are not necessary to cure the disease. I don’t know that the inpatient treatment is a kind of fine comprehensive treatment, ask the outpatient department is the injection, the inpatient department is also only the injection, is not no difference? Therefore, oral medication, compresses, nebulization and infrared physical therapy prescribed for the treatment of lower respiratory tract infections are all necessary, and it is also important to have verbal medical advice to “have the family regularly pat the back to expel sputum”. The importance of regular back patting and sputum removal is explained here. When a child has pneumonia, especially mycoplasma pneumonia, it is very easy for a large area of pneumonia to become atelectasis, and very often it is difficult to absorb the pneumonia and make the atelectasis reopen just by injections, the reason is simple. The reason is simple. Large pneumonia exudate will produce a lot of inflammatory necrotic material, and eventually form phlegm, after coughing out of the body, but if these materials are too viscous, will form sputum or pus clogging bronchial formation of atelectasis, and this sputum or pus clot injection can not be eliminated, then how to do? The main non-invasive methods are vibration and back-slap sputum removal. If they do not work, the problem can only be solved by fiberoptic bronchoscopy. How is back-slap expectoration performed? First, it is important to know that the principle is actually the use of gravity to drain sputum. How is gravity used? We have to look at the direction of the bronchi first, and the lung bronchi are like two “trees” extending to both sides. The second is the technique of patting the back, which requires the use of hollow palm clasp, using the vibration of air to vibrate the sputum or pus plug. Again is the timing and duration of the problem, my experience is: as long as a large area of pneumonia pulmonary real change should be patted back drainage, not necessarily wait until the emergence of pulmonary atelectasis to start, to ensure 4-5 times a day, each time each side of the lung pat 2-5 minutes, of course, can drain longer may be better, until the absorption of pneumonia, pulmonary atelectasis.