A client is receiving oxygen at 2 L/min via a nasal cannula. What oxygen concentration is the client receiving?
28%
70%
509%
36% .
The Correct Answer is A
The correct answer is Choice A. The client is receiving an oxygen concentration of 28%. Nasal cannulas can deliver oxygen at a flow rate ranging from 1 to 6 liters per minute (L/min), with
each additional liter increasing the fraction of inspired oxygen (FiO2) by 4%. Therefore, at 2 L/min, the client is receiving an oxygen concentration of 28%78.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Using a humidifier beside the bed at night may not necessarily decrease the number of apneic episodes in a client with obstructive sleep apnea. While a humidifier can help moisten the airways and may provide some relief from symptoms such as dry mouth or throat, it does not address the underlying issue of airway obstruction.
Choice B rationale
Losing weight can indeed help decrease the number of apneic episodes in a client with obstructive sleep apnea. Obesity is a major risk factor for sleep apnea, as excess fat tissue can thicken the wall of the windpipe, making it narrower and making it harder to keep open.
Therefore, losing weight can help reduce this fat and widen the airway, leading to fewer apneic episodes.
Choice C rationale
Taking a sleeping pill at night may actually worsen obstructive sleep apnea. While it might help the client fall asleep, it can also relax the muscles of the throat, which can make the airway more likely to collapse during sleep, leading to more apneic episodes.
Choice D rationale
Drinking a glass of red wine before bedtime is not recommended for a client with obstructive sleep apnea. Alcohol can relax the muscles in the throat and can disrupt the normal sleep cycle, both of which can lead to more apneic episodes.
Correct Answer is ["2 ."]
Explanation
Step 1: Identify the prescribed dose and the available dose. The prescribed dose is 500 mg and the available dose is 250 mg per tablet.
Step 2: Use the formula for calculating the number of tablets: (Prescribed dose ÷ Available dose) = Number of tablets.
Step 3: Substitute the values into the formula: (500 mg ÷ 250 mg/tablet) = 2 tablets. So, the nurse should administer 2 tablets.
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