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 B

Explanation

Choice A rationale

Full-thickness tissue loss extending to underlying support structures such as muscle, tendon, or bone is characteristic of a stage 4 pressure ulcer, not a stage 312.
Choice B rationale
A stage 3 pressure ulcer involves full-thickness skin loss and may appear as a deep crater. There may be damage to or necrosis of subcutaneous tissue that may extend down to, but not through, underlying fascia. This description matches the statement in Choice B, making it the correct answer.
Choice C rationale
A shallow, ruptured or intact skin blister without slough is more indicative of a stage 2 pressure ulcer. In a stage 2 pressure ulcer, there is partial-thickness loss of dermis presenting as a shallow open ulcer with a red-pink wound bed.
Choice D rationale
Unbroken skin with un-blancheable erythema is characteristic of a stage 1 pressure ulcer, not a stage 3. In a stage 1 pressure ulcer, the skin is not broken, but it has redness that does not lighten (or blanch) when you press on it.

A. 5 mL B. 6 mL C. 7 mL D. 8 mL

Correct Answer is C

Explanation

Step 1 is to calculate the amount of amoxicillin in milliliters. Step 2: We know that 250 mg of amoxicillin is in 5 mL.
Step 3: We need to find out how many mL contain 350 mg of amoxicillin. Step 4: Set up a proportion: 250 mg/5 mL = 350 mg/x mL.
Step 5: Cross-multiply and solve for x: 250x = 1750. Step 6: Divide both sides by 250: x = 7 mL2.

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

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Naxlex Comprehensive Predictor Exams

A nurse is discussing pressure ulcer staging with a newly licensed nurse. Which statement should the nurse use to describe a stage 3 pressure ulcer?

Correct Answer is B

Explanation

A nurse is preparing to administer amoxicillin 350 mg PO. The available amoxicillin is 250 mg/5 mL. How many mL should the nurse administer? (Round to the nearest whole number.)

Correct Answer is C

Explanation

A home health nurse is visiting a client who has COPD and is receiving oxygen at 2 L/min via nasal cannula. The client reports difficulty breathing.What is the nurse’s priority action?

A nurse is caring for a client who has pneumonia. The client’s oxygen saturation is 85%. What is the first action the nurse should take?

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?

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A nurse is caring for a patient who frequently attempts to remove his feeding tube. A family member requests that a restraint be applied. Which of the following statements by the nurse is appropriate?

A nurse is preparing to administer amoxicillin 300 mg PO. The available medication is amoxicillin oral solution 250 mg/5 mL. How many mL should the nurse administer?

A patient is undergoing oxygen therapy through a nasal cannula.If the patient inquires about the reason for having oxygen tubing in their nose, what explanation about the cannula should the nurse provide?