Kettering Registered Respiratory Practice Exam

The non-rebreather mask is the best oxygen delivery system for a patient requiring high concentration oxygen with minimal rebreathing of carbon dioxide. This type of mask is designed to deliver a high concentration of oxygen, typically around 90-100%, due to its unique construction that includes a one-way valve. This valve allows oxygen to flow in from the oxygen source while preventing the patient's exhaled carbon dioxide from re-entering the mask.

The non-rebreather mask effectively supports patients who are in critical conditions, such as those experiencing respiratory failure or hypoxemia, by ensuring that they receive sufficient oxygen while limiting the possibility of CO2 rebreathing. It is particularly suitable in emergencies, where maximizing oxygen delivery is crucial for patient outcomes.

In contrast, systems such as a simple face mask deliver lower concentrations of oxygen and can allow for significant rebreathing since there are no mechanisms to trap exhaled air. A nasal cannula provides a much lower concentration of oxygen and is generally designed for stable, chronic conditions, not acute situations requiring high oxygen levels. The Venturi mask, while excellent for providing a specific, consistent oxygen concentration, does not generate the high levels of oxygen delivery that a non-rebreather mask can, thus making it