What is bpd, and why doesn't it happen to regular babies?

Pulmonary injury. Bpd is a term for the scaring that occurs as a reaction in premi's lung tissue to long term high ventilator pressures & oxygen needed to keep them alive.If delivered early we must push oxygen into weak tissue because thats all there is.This can leave scarring.Term babies or near term premi's are more resilient & usually get better with less oxygen & pressure to get over any problems.
Breathing difficulty. Most infants who develop BPD are born more than 10 weeks before their due dates, weigh less than 2 pounds (about 1,000 grams) at birth, have breathing problems. High oxygen and ventilatory pressures to keep lungs open.Infections that occur before or shortly after birth also can contribute to BPD.Infants that recover may have problems with asthma. More severe cases may require ventilatory support.