A client is receiving oxygen at 2 L/min via a nasal cannula. What oxygen concentration is the client receiving?

28%

70%

509%

36% .

Answer and Explanation

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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Correct Answer is D

Explanation

Choice A rationale
Applying the pulse oximeter probe to the toe might not provide an accurate reading if the client has poor peripheral circulation. Additionally, thickened toenails can interfere with the reading.
Choice B rationale

Edema in the hands can affect the accuracy of a pulse oximeter reading. The probe might not fit properly or provide a reliable reading if the finger is swollen.
Choice C rationale
Applying the pulse oximeter probe to a skin fold is not recommended. The probe needs to be placed on a relatively flat, thin area of skin to accurately measure oxygen saturation.
Choice D rationale
The earlobe is a suitable alternative site for pulse oximetry if the fingers and toes are not viable options. The earlobe is typically less affected by peripheral vasoconstriction, which can occur with hypothermia, certain medications, and certain diseases. Therefore, Choice D is the correct answer.

A. 1 tablet B. 2 tablets C. 3 tablets D. 4 tablets

Correct Answer is B

Explanation

Step 1 is to determine how many tablets to administer. The client needs 650 mg of aspirin and each tablet contains 325 mg. So, the calculation is 650 mg ÷ 325 mg/tablet.
Step 2 is to perform the calculation. The result is 2 tablets.

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A client is receiving oxygen at 2 L/min via a nasal cannula. What oxygen concentration is the client receiving?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is preparing to measure a client’s oxygen saturation and notes edema of the client’s hands and thickened toenails. Where should the nurse apply the pulse oximeter probe?

Correct Answer is D

Explanation

A nurse is preparing to administer aspirin 650 mg PO. The available medication is aspirin 325 mg tablets. How many tablets should the nurse administer?

Correct Answer is B

Explanation

A nurse is about to take a client’s oral temperature, but the client has just consumed some ice chips. What should the nurse do next?

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