IRCT20240130060854N1 IRCT 2024-02-21 Ahvaz University of Medical Sciences Efficacy of nasal high frequency oscillatory ventilation versus nasal continuous positive airway pressure and double positive airway pressure in neonates less than 34 weeks with respiratory distress syndrome: a randomized controlled trial. Efficacy of nasal high frequency oscillatory ventilation versus nasal continuous positive airway pressure and double positive airway pressure in neonates less than 34 weeks with respiratory distress syndrome: a randomized controlled trial. 2024-02-18 anticipated 192 Complete https://irct.ir/trial/75370 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: First select six senary blocks and then numbers of one to six are assigned. The statistician randomly selects a number between one to six , And based on the obtained sequence patients are randomly placed in one of groups a, b, c. And the above sequence continues until the patient reaches the number 64 in each group, Blinding description: Patients are neonats. Clinical observers do routine care and have no idea about members and study. N/A Respiratory distress syndrome. First intervention group: treatment with NHFOV / Second intervention group: treatment with CPAP / Third intervention group: treatment with DUOPAP. Yes - There is a plan to make this available What will be shared: Personal data of participants can be shared after unidentifiable When: The access period starts 6 month after the publication of the results To whom: Researchers working in academic and scientific institutions Conditions: Use for systematic review articles Journal reviewer's request to review the information Where to obtain: Corresponding author How to obtain: Researchers request from corresponding author Comments: