Can docs please explain are bronchopulmonary dysplasia and infant respiratory distress syndrome the same thing?

No: Respiratory distress syndrome refers to immaturity of the lungs and the resulting constellation of symptoms seen in premature infants. Bronchi pulmonary dysphasia or chronic lung disease is often the end result of severe RDS which required lots of respiratory support and refers to the prolonged need for oxygen or diuretic or bronchodilator therapy to treat these relatively maldeveloped lungs.