IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-12-4-48483 Original Research Paper Evaluation Of High Flow Nasal Cannula And Non Invasive Ventilation As First Line Therapy In Acute Hypoxemic Respiratory Failure. Sheikh Usmani Gani Dr. Dr. Saba Ahad Dr. Dr. Rukhsana Najeeb Dr. April 2023 12 4 01 02