A nurse is caring for a client who is receiving oxygen therapy via a nasal cannula. How should the nurse explain to the client how this method of oxygen delivery performs?
Delivers a low concentration of oxygen.
Delivers a constant rate of oxygen.
Delivers a high concentration of oxygen.
Delivers a constant flow of a specific concentration of oxygen.
The Correct Answer is D
Choice A Reason:
“Delivers a low concentration of oxygen” is incorrect because a nasal cannula can deliver varying concentrations of oxygen depending on the flow rate set by the healthcare provider. The concentration can range from low to moderate, typically between 24% to 44%.
Choice B Reason:
“Delivers a constant rate of oxygen” is partially correct but not entirely accurate. While the flow rate can be constant, the key aspect is the specific concentration of oxygen delivered, which is more relevant to the client’s understanding.
Choice C Reason:
“Delivers a high concentration of oxygen” is incorrect because nasal cannulas are generally used for low to moderate oxygen delivery. High concentrations of oxygen are typically delivered through other devices like non-rebreather masks or high-flow nasal cannulas.
Choice D Reason:
“Delivers a constant flow of a specific concentration of oxygen” is correct. This explanation accurately describes how a nasal cannula works. It provides a continuous flow of oxygen at a specific concentration, which is adjusted based on the client’s needs and the healthcare provider’s prescription.

Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A Reason:
Loperamide should not be used if diarrhea is infectious is correct. Loperamide is an antidiarrheal medication that works by slowing down gut movement. However, if the diarrhea is caused by an infection, such as from spoiled food, it is important to allow the body to expel the infectious agents. Using loperamide in such cases can prolong the infection and potentially worsen the condition.
Choice B Reason:
You can take loperamide until the diarrhea stops is incorrect. While loperamide can be effective for non-infectious diarrhea, it is not recommended for infectious diarrhea. Stopping the diarrhea prematurely can trap the infectious agents in the intestines, leading to more severe symptoms.
Choice C Reason:
Loperamide has no side effects is incorrect. Loperamide can have side effects, including constipation, dizziness, and abdominal pain. It is important to use this medication under the guidance of a healthcare provider, especially in cases of infectious diarrhea.
Choice D Reason:
Loperamide should not stop this type of diarrhea is incorrect. While it is true that loperamide should not be used for infectious diarrhea, the statement is misleading. Loperamide can stop diarrhea, but it is not appropriate for all types of diarrhea, particularly those caused by infections.
Correct Answer is C
Explanation
Advance directives are legal documents that allow individuals to outline their preferences for medical treatment in case they become unable to communicate their decisions. These documents typically include a living will and a durable power of attorney for healthcare. The living will specifies the types of medical treatment a person wishes to receive or avoid, while the durable power of attorney for healthcare designates a trusted individual to make healthcare decisions on their behalf.
Choice A Reason:
“I will get my regular doctor to approve my plan before I hand it in to the hospital.”
This statement indicates a misunderstanding of the purpose of advance directives. While it is important to discuss your advance directives with your healthcare provider, the primary purpose of these documents is to communicate your wishes regarding medical treatment, not to seek approval from your doctor. The advance directive is a personal document that reflects your values and preferences for medical care.
Choice B Reason:
“I know they won’t go ahead with the surgery unless I prepare these forms.”
This statement also reflects a misunderstanding. While having advance directives in place is highly recommended, it is not typically a prerequisite for undergoing surgery. Advance directives are important for ensuring that your medical wishes are respected, but they are not mandatory for surgical procedures. The focus should be on making sure your wishes are known and documented, rather than on the necessity of the forms for surgery.
Choice C Reason:
“I plan to write that I do not want them to keep me on a breathing machine.”
This statement correctly reflects the purpose of an advance directive. It shows that the patient understands that they can specify their preferences for medical treatment, such as whether or not they want to be kept on a breathing machine. This type of instruction is a common component of a living will, which is part of an advance directive. It ensures that healthcare providers are aware of the patient’s wishes regarding life-sustaining treatments.
Choice D Reason:
“I would rather have my brother make decisions for me, but I know he has to be my wife.”
This statement is incorrect and confusing. It seems to mix up the roles of different individuals. In an advance directive, you can designate a healthcare proxy or durable power of attorney for healthcare, who can be any trusted person, not necessarily a spouse. The statement also contains a factual error, as it implies that the brother must be the patient’s wife, which is not possible. The correct understanding is that you can choose any trusted individual to make healthcare decisions on your behalf.
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