A nurse is evaluating the effectiveness of oxygen therapy for a patient who has COPD. The nurse notes that the patient's PaO2 is 65 mmHg and SaO2 is 88%. What should the nurse say to the patient?
"Your oxygen levels are within the normal range for your condition.”.
"Your oxygen levels are too low and you need more oxygen.”.
"Your oxygen levels are too high and you need less oxygen.”.
"Your oxygen levels are not affected by your oxygen therapy.".
The Correct Answer is B
Choice A rationale:
The patient's PaO2 is 65 mmHg and SaO2 is 88%. PaO2 values below 80 mmHg and SaO2 below 90% are considered below normal ranges. Therefore, the patient's oxygen levels are not within the normal range for the condition.
Choice B rationale:
This is the correct choice. The patient's PaO2 and SaO2 levels indicate that they are not receiving enough oxygen, and additional oxygen therapy is needed.
Choice C rationale:
The patient's oxygen levels are low, not high. Providing less oxygen would worsen the situation.
Choice D rationale:
The patient's oxygen levels are affected by oxygen therapy, as they indicate that the current therapy is insufficient. Additional interventions are needed to improve oxygenation.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
Nasal cannula delivers oxygen through two small prongs placed in the patient's nostrils. While it is a commonly used and well-tolerated device, the FiO2 delivered can vary significantly depending on the patient's breathing pattern and respiratory rate. Thus, it does not provide the most precise and consistent FiO2.
Choice B rationale:
Simple face masks cover the nose and mouth and can provide higher FiO2 levels compared to nasal cannulas. However, the FiO2 delivered still depends on the patient's breathing pattern and the mask's fit, making it less precise and consistent than other options.
Choice C rationale:
Venturi masks are designed to deliver a specific and accurate FiO2, regardless of the patient's breathing pattern. These masks have adjustable ports to control the mix of air and oxygen, providing precise oxygen concentrations.
Choice D rationale:
Non-rebreather masks have one-way valves and a reservoir bag to deliver higher concentrations of oxygen. Although they can provide high FiO2 levels, the delivered concentration can vary based on the patient's breathing pattern and the mask's fit.
Correct Answer is ["A","B","E"]
Explanation
The correct answer is choice a, b, and e.
Choice A rationale:
A non-rebreather mask is designed to deliver a high concentration of oxygen, often deemed the highest among low-flow systems. It achieves this through a reservoir bag that is filled with pure oxygen, which the patient breathes in without the dilution of room air.
Choice B rationale:
This mask has one-way valves that prevent the patient from rebreathing exhaled carbon dioxide. The exhaled air exits through side ports, ensuring that only oxygen from the reservoir is inhaled.
Choice C rationale:
While a non-rebreather mask delivers a high concentration of oxygen, it does not provide a consistent and precise oxygen delivery compared to devices like a Venturi mask, which are designed to deliver a specific and constant oxygen concentration.
Choice D rationale:
The design of a non-rebreather mask does not allow room air to enter through the exhalation ports. The one-way valves are there to ensure that exhaled air does not enter the reservoir bag and that room air does not mix with the oxygen being inhaled.
Choice E rationale:
By delivering a high concentration of oxygen and preventing the rebreathing of exhaled gases, a non-rebreather mask minimizes the risk of carbon dioxide retention, which can be a concern with other oxygen delivery systems that allow for the rebreathing of a portion of exhaled air.
In summary, the non-rebreather mask is advantageous for its ability to deliver a high concentration of oxygen and prevent the rebreathing of exhaled air, which also minimizes the risk of carbon dioxide retention. It is not designed for precise oxygen delivery, nor does it allow the mixing of room air during inhalation.
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