Which of the following is a high flow oxygen administration device?

MNS 2024

Nursing Foundation

Easy

Appeared in: MNS 2024

Explanation

A non-rebreathing mask requires a high input flow rate, typically 10-15 L/min, to function correctly.
It is designed to deliver the highest concentration of oxygen (60-95%) of any non-invasive device without positive pressure.
The high flow is necessary to keep the reservoir bag inflated, which serves as a source of nearly 100% oxygen for the patient to inhale.
Among the choices provided, it is the only device that operates at such high flow rates and delivers such a high fraction of inspired oxygen (FiO₂).

Option A: A trans-tracheal catheter is a low-flow device that delivers oxygen directly into the trachea at very low rates, typically 0.25 to 4 L/min. It is designed for long-term, continuous oxygen therapy at home.
Option B: Nasal cannulas are the most common low-flow devices, delivering oxygen at rates of 1-6 L/min, which corresponds to an FiO₂ of approximately 24-44%.
Option D: A simple mask is a low-flow device that delivers a higher oxygen concentration than a nasal cannula but is still considered low-flow. It operates at 6-12 L/min to provide an FiO₂ of 35-50%. A flow rate below 6 L/min risks CO₂ rebreathing.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Classification of Oxygen Delivery Devices as background academic context rather than a clinical decision trigger.
Correctly identifying and using oxygen delivery devices is a fundamental nursing skill critical for patient safety. Using a device at an incorrect flow rate can be ineffective or even harmful.
For a non-rebreathing mask, the most critical nursing action is ensuring the reservoir bag remains inflated. A collapsing bag is a red flag indicating insufficient flow, leading to CO₂ rebreathing and worsening hypoxia.
What if the patient needs to eat? A non-rebreathing mask must be worn continuously to be effective. If a patient on an NRB mask needs to eat, the nurse must consult with the provider about temporarily switching to a high-flow nasal cannula, if appropriate, to maintain oxygenation during meals.

How to Approach the Question

First, identify the key terms in the question: 'high flow' and 'oxygen administration device'.
Define 'high flow' in the context of oxygen therapy. This refers to devices that require a high input flow rate and/or deliver a precise, high concentration of oxygen.
Evaluate each option based on its typical operating flow rate and delivered oxygen concentration.
Compare the options. A nasal cannula and trans-tracheal catheter are clearly low-flow. A simple mask is also low-flow, though higher than a cannula.
Recognize that the non-rebreathing mask requires the highest flow rate (10-15 L/min) and delivers the highest FiO₂ among the choices, making it the best fit for the 'high flow' category in this context.

Concept Tested & Keywords

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