Written by: Jordan Maivelett, MD (EM Resident Physician, PGY-1, NUEM); Edited by: Bill Burns, MD (EM Resident Physician, PGY-4, NUEM); Expert Commentary by: Jacqueline Kruser, MD High flow nasal cannula (HFNC) is a method of oxygen delivery that can administer oxygen at flow rates of up to 60 L/min with fractions of inspired oxygen between 0.21 and 1.0 [1]. The main proposed benefit of HFNC is improved oxygenation when compared with standard oxygen therapy. This is achieved through a variety of...