### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
My 3yrs old son is on home oxygen therapy now.On jan 3 2011 bronchoscopy was done bcs air isnt passing into his right lung puss has removed from right lung after that pneumonia had spread in both lungs.he was ventilated for 11 days( at high frequency also )from then he was on oxygen therapy on 2lts and his upper body has enlarged near rib cage we ask doctors about it . They said it is due to bcs of pressure applied by the ventilators.They said the problem was lower lobe had damaged(CT-scan report).Doctors said it will take 6monts to come out of oxygen.Now nearly 1yr over but no recovery .Now as we are asking ow much time it will take to come out of oxygen,they said nothing.Now was on steroids(omnacortil) & inhaler(puff). Pls tell what is his problem and his chest diaphragm is enlarged ,i tink it is barrel chest is it right or not

### output:

My dear child your son has a condition called bronchopulmonary dysplasia following a severe attack of pneumonia, that has caused one lobe of lung to be damaged. There are 3 parts in the lung, the tubes called airways that allow air to pass through, there are the air sacs or alveoli that exchange the oxygen and carbon dioxide and then the part of the lung in between.basically lining is destroyed, and the elasticity is lost. This causes a lot of breathing problems -----and also he cannot exchange gases and his oxygen level will be low unless extra oxygen is given. These are the things one can help the repair process in the lung-----1. Give him very good nutrition, high energy formulas will help and vitamin supplementation especially vitamin A. Ca, Phosdphorous and It D for integration of Chest wall bone cage.2. Gentle chest physiotherapy 3. Protect from recurrent viral infections --good hand hygiene, avoid too many visitors, do not take him to malls or crowded areas, 4.avoid smoking, pets , perfumes,carpets near him.5. Medications like inhaled bronchodilators to keep airways open, courses of corticosteroids 6. Protectors like montelukast 7.regular vaccinations 8. There will be gradual recovery, may take a year or more ----follow up with a pulmonologist is a must, who will rule out some inherited disorders like cystic fibrosis and also with general pediatrician. I am sure with regular dedicated care your son should improve.