Final answer:
The inappropriate liter flow for oxygen administration via a nasal cannula is 8-10 liters/min, as this can cause discomfort and mucosal damage, and is beyond the scope of conventional nasal cannula devices.
Step-by-step explanation:
The liter flow that is inappropriate for oxygen administration via a nasal cannula is 8-10 liters/min. A nasal cannula is typically used to deliver low to moderate levels of oxygen to patients who require oxygen therapy. The typical flow rates for a nasal cannula range from 1-6 liters per minute, providing approximately 24-44% oxygen to the patient. Delivering oxygen at a rate higher than 6 liters per minute can cause discomfort, dryness, and potential injury to the nasal mucosa due to the unhumidified oxygen. It can also lead to inadequate humidification of the oxygen, which is important for respiratory mucosal health. Moreover, high flow rates such as 8-10 liters/min are not effectively delivered via a nasal cannula; for these flow rates, a different type of oxygen delivery device, such as a non-rebreather mask or a high-flow nasal cannula system, may be required.