IRCT20120614010026N11 IRCT 2022-03-13 Esfahan University of Medical Sciences Evaluation of the relationship between NCPAP use and chronic lung disease in preterm infants. Evaluation of the relationship between isolation from NCPAP at 3 and 5 cm H2O pressures with the incidence of BPD in neonates admitted to the NICU ward with a gestational age less than or equal to 32 weeks and birth weight less than or equal to 1500 grams. 2022-01-21 anticipated 206 Complete https://irct.ir/trial/61821 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Sampling is done by Randomized by assignment method using double-blind randomized blocks, as one of the groups called A and the other B is named. The order of group A or B is an AB or BA method, and a block is formed for both eligible infants that are admitted to the NICU section. Then, based on the mother's family name and random numbers in numbers, 0 4 arrangements AB and numbers 5 9 BA arranged to reach the sample size, Blinding description: In this study, parents of neonates (participants) are blind to their baby than the type of respiratory intervention. N/A Bronchopulmonary dysplasia. Intervention 1: In infants in the intervention group who are under CPAP (Continuous Positive Airway Pressure) if the clinical condition is stable at 5CmH2O, the CPAP pressure is reduced by one every 12 hours to 3CmH2O and then the infant is removed from the device and if necessary , Receive oxygen supplementation with hood with flow of 10 Lit / min. If SPO2 is tolerated and maintained between 91-95% in room air for at least four hours, no oxygen supplementation is required. Intervention 2: Infants in the control group under CPAP (Continuous Positive Airway Pressure) are isolated from the device if they have stable clinical conditions at 5CmH2O pressure and, if necessary, receive supplemental oxygen by oxyhood method with a flow rate of 10 Lit / min. If SPO2 is tolerated and maintained between 95-91% in room air for at least 4 hours, no oxygen supplementation is required. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no more information.