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<p>Oxygen - we all need it! Sometimes we need more of it in order to maintain our oxygen saturations. In these situations, supplemental oxygen can be administered via various oxygen delivery devices, ranging from nasal prongs to invasive ventilation. There are two important things to consider when delivering supplemental oxygen to your patient: the oxygen flow rate and the FiO2. The oxygen flow rate is the number that we dial up on the oxygen flow metre, usually between 1-15L/min. FiO2 is defined as the percentage or concentration of oxygen that a person inhales (the fraction of inspired oxygen). The atmospheric air </p>