When discussing options for hypoxemia, it seems like there are so many noninvasive oxygen delivery systems! Nasal cannula, high flow nasal cannula (HFNC), non-rebreathers (NRB), and more are routinely used in the settings I’ve worked in.
Without getting into too many details (patient comfort, ventilatory status, nebulizer therapy, inhaled pulmonary dilators, “rules” about certain systems requiring ICU-level care, etc.), this diagram illustrates the common oxygen flows and resulting fraction of inspired oxygen (FiO2) one can expect. Keep in mind that often times these devices are fitted with humidifiers for comfort and to enhance mucociliary function. Shout out to the respiratory therapists and nurses who are constantly involved with maintaining and weaning these devices!
Drop me a comment below with questions! 🙂