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: Pee privacy
Ensuring privacy for a patient, especially one who is pregnant, is crucial. Privacy helps maintain the patient’s dignity and comfort during medical procedures. It also fosters a trusting relationship between the patient and the healthcare provider. In this context, “Pee privacy” likely refers to ensuring the patient has privacy when providing a urine sample, which is a common procedure during pregnancy check-ups to monitor for conditions like gestational diabetes or preeclampsia.
Choice B reason: Otoscope
An otoscope is a medical device used to look into the ears. While it is an essential tool in many medical examinations, it is not specifically related to the care of a pregnant patient unless there is a specific concern about ear health. Therefore, this choice is less relevant in the context of routine pregnancy care.
Choice C reason: Tannic acid
Tannic acid is a substance that can be used for various medical purposes, including treating burns and stopping bleeding. However, it is not typically associated with routine pregnancy care. Its inclusion in this list seems out of place unless there is a specific, unusual medical condition being addressed.
Choice D reason: Pupil dilation
Pupil dilation is a procedure often performed during eye examinations to allow a better view of the retina and other structures inside the eye. While important in ophthalmology, it is not a standard procedure in the care of a pregnant patient unless there is a specific concern about the patient’s vision or eye health.
Correct Answer is A
Explanation
Choice A Reason:
A 24-hour urinary output of 380 mL indicates oliguria. Oliguria is defined as a urine output of less than 400-500 mL per day in adults. This condition can be caused by various factors, including dehydration, kidney dysfunction, or postoperative complications. Monitoring urine output is crucial for assessing kidney function and overall fluid balance, especially after major surgeries like a colon resection.

Choice B Reason:
A 24-hour urinary output of 550 mL is slightly above the threshold for oliguria. While it is still relatively low, it does not meet the strict criteria for oliguria, which is typically defined as less than 400-500 mL per day. This output suggests that the client is producing an adequate amount of urine, though it may still warrant close monitoring to ensure it does not decrease further.
Choice C Reason:
A 24-hour urinary output of 600 mL is within the normal range and does not indicate oliguria. Normal urine output for adults is generally considered to be around 800-2000 mL per day, depending on fluid intake and other factors. This output suggests that the client’s kidneys are functioning properly and that there is no immediate concern for oliguria.
Choice D Reason:
A 24-hour urinary output of 720 mL is also within the normal range and does not indicate oliguria. This output is closer to the lower end of the normal range but still suggests adequate kidney function. It is important to continue monitoring the client’s urine output to ensure it remains within a healthy range, especially after surgery.
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