HESI LPN
CAT Exam Practice
1. While a patient is receiving beta-1b interferon every other day for multiple sclerosis, which serum laboratory test findings should the nurse monitor to assess for possible bone marrow suppression caused by the medication? (Select all that apply)
- A. Platelet count
- B. White blood cell count (WBC)
- C. Sodium and potassium
- D. Red blood cell count (RBC)
Correct answer: A
Rationale: Beta-1b interferon can lead to bone marrow suppression, impacting blood cell production. Therefore, monitoring the platelet count, white blood cell count (WBC), and red blood cell count (RBC) is essential. Platelet count is a direct indicator of bone marrow function and can show early signs of bone marrow suppression. While sodium, potassium, and albumin/protein levels are important for overall health assessment, they are not directly associated with bone marrow suppression caused by the medication.
2. What action should the nurse take after a client produces the first of a series of sputum samples for cytology?
- A. Ensure the client remains NPO until all samples are collected
- B. Transport the sputum container to the laboratory in a biohazard bag
- C. Discard the initial sample and document the time it was obtained
- D. Document the time the client last ate or drank on the laboratory slip
Correct answer: B
Rationale: The correct action for the nurse to take after a client produces the first of a series of sputum samples for cytology is to transport the sputum container to the laboratory in a biohazard bag. This is important to ensure proper handling and prevent contamination of the sample. Choice A is incorrect because there is no need to keep the client NPO until all samples are collected. Choice C is incorrect as the initial sample should not be discarded but rather transported to the laboratory. Choice D is also incorrect as documenting the time the client last ate or drank is not directly relevant to the immediate action needed for the sputum sample.
3. For a client with pneumonia, the prescription states, “Oxygen at liters/min per nasal cannula PRN difficult breathing.†Which nursing intervention is effective in preventing oxygen toxicity?
- A. Avoiding the administration of oxygen at high levels for extended periods.
- B. Administering a sedative at bedtime to slow the client’s respiratory rate.
- C. Removing the nasal cannula during the night to prevent oxygen buildup.
- D. Running oxygen through a hydration source prior to administration.
Correct answer: A
Rationale: Choice A is the correct answer because prolonged exposure to high levels of oxygen can lead to oxygen toxicity. Administering oxygen at high levels for extended periods can overwhelm the body's natural defenses against high oxygen levels, causing toxicity. Choices B, C, and D are incorrect. Choice B is unrelated to preventing oxygen toxicity. Choice C is unsafe as removing the nasal cannula can deprive the client of necessary oxygen. Choice D, running oxygen through a hydration source, is not a standard practice for preventing oxygen toxicity.
4. A client who is newly diagnosed with type 2 diabetes mellitus (DM) receives a prescription for metformin (Glucophage) 500 mg PO twice daily. What information should the nurse include in this client’s teaching plan? (Select all that apply.)
- A. Take an additional dose for signs of hyperglycemia
- B. Recognize signs and symptoms of hypoglycemia.
- C. Report persistent polyuria to the healthcare provider.
- D. Use sliding scale insulin for finger stick glucose elevation.
Correct answer: D
Rationale: The correct answer is D. Metformin does not require additional doses for hyperglycemia, and sliding scale insulin is not typically used with metformin. It is important for the client to recognize signs and symptoms of hypoglycemia, report persistent polyuria to the healthcare provider, and take the medication with meals. Teaching the client to use sliding scale insulin for finger stick glucose elevation is not appropriate in this case because metformin is the prescribed medication, and its mechanism of action differs from insulin therapy. The client should be educated on the importance of taking metformin with meals to reduce gastrointestinal side effects and to report any persistent polyuria, which could indicate poor blood sugar control.
5. The nurse is measuring the output of an infant admitted for vomiting and diarrhea. During a 12-hour shift, the infant drinks 4 ounces of Pedialyte, vomits 25 ml, and voids twice. The dry diaper weighs 105 grams. Which computer documentation should the nurse enter in the infant’s record?
- A. Subtract vomitus from 120 ml Pedialyte, then document 95 ml oral intake.
- B. Compare the difference between the infant’s current weight and admission weight.
- C. Document on the flow sheet that the infant voided twice and vomited 25 ml.
- D. Calculate the difference in wet and dry diapers and document 80 ml urine.
Correct answer: C
Rationale: The correct answer is to document on the flow sheet that the infant voided twice and vomited 25 ml. This choice accurately reflects the need for accurate documentation of intake and output, essential for monitoring the infant's hydration status. Choice A is incorrect because the oral intake should not be calculated by subtracting vomitus from the oral intake. Choice B is incorrect because it does not address the specific documentation related to the infant's output. Choice D is incorrect as it focuses on calculating urine output based on diaper weight, which is not the primary concern in this scenario.
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