Nursing Elites

1. Which laboratory test would be the least effective in diagnosing a myocardial infarction?

• A. AST
• B. Troponin
• C. CK-MB
• D. Myoglobin

Correct answer: A

Rationale: AST, choice A, would be the least effective in diagnosing a myocardial infarction as it is not specific for this condition. Troponin, CK-MB, and myoglobin (choices B, C, and D) are more specific markers for myocardial infarction. Troponin is considered the gold standard due to its cardiac specificity. CK-MB is also specific to the heart, and its isoenzyme levels elevate post-heart damage. Myoglobin, although elevated in myocardial infarction, is not as specific as troponin and CK-MB and can also increase in conditions like burns and muscle trauma. Therefore, AST is the least effective choice for diagnosing a myocardial infarction.

2. The client is taking rifampin 600mg po daily to treat his tuberculosis. Which action by the nurse indicates understanding of the medication?

• A. Telling the client that the medication will need to be taken with juice
• B. Telling the client that the medication will change the color of the urine
• C. Telling the client to take the medication before going to bed at night
• D. Telling the client to take the medication if night sweats occur

Correct answer: B

Rationale: The correct answer is telling the client that the medication will change the color of the urine. Rifampin can change the color of the urine and body fluid. Teaching the client about these changes is important as the client might think this is a complication. Answer A is incorrect because there is no specific requirement to take rifampin with juice. Answer C is incorrect because rifampin should be taken at consistent times, not necessarily before going to bed. Answer D is incorrect as rifampin should be taken regularly as prescribed, not based on symptoms like night sweats.

3. How can medication bound to protein affect drug availability?

• A. enhanced drug availability
• B. rapid distribution of the drug to receptor sites
• C. less availability to produce desired medicinal effects
• D. increased metabolism of the drug by the liver

Correct answer: C

Rationale: Medication bound to protein reduces the availability of the drug to produce desired medicinal effects because only unbound drugs can effectively bind to active receptor sites. When a drug is bound to protein, it cannot bind with receptor sites, limiting its therapeutic impact. Choice A is incorrect because drug availability is reduced when it is bound to protein. Choice B is incorrect as rapid distribution to receptor sites is not possible if the drug is bound to protein and cannot bind with receptors. Choice D is incorrect as metabolism does not increase when the drug is bound to protein; the liver first needs to separate the drug from the protein before metabolism can occur.

4. Which task should not be performed by the licensed practical nurse?

• A. Inserting a Foley catheter
• B. Discontinuing a nasogastric tube
• C. Obtaining a sputum specimen
• D. Initiating a blood transfusion

Correct answer: D

Rationale: A licensed practical nurse should not initiate a blood transfusion. LPNs can assist with transfusions and verify ID numbers but should not be assigned to initiate the procedure. Inserting Foley catheters, discontinuing nasogastric tubes, and obtaining sputum specimens are within the scope of practice for LPNs. Therefore, options A, B, and C are tasks that LPNs can perform, making them incorrect choices.

5. A twenty-one-year-old man suffered a concussion, and the MD ordered an MRI. The patient asks, 'Will they allow me to sit up during the MRI?' The correct response by the nurse should be:

• A. "I will have to talk to the doctor about letting you sit upright during the test."?
• B. "You will be positioned in the reverse Trendelenburg position to maximize the view of the brain."?
• C. "The radiologist will let you know."?
• D. "You will have to lie down on your back during the test."?

Correct answer: D

Rationale: The correct answer is to inform the patient that they will have to lie down on their back during the MRI. This positioning is necessary for the scan to obtain accurate images of the brain. Choice A is incorrect because the decision on the positioning during the MRI is typically determined by the imaging protocol and not subject to negotiation during the test. Choice B is incorrect as the reverse Trendelenburg position is not commonly used during MRI scans. Choice C is incorrect because the radiologist does not usually make decisions on patient positioning during the MRI; it is predetermined by the imaging requirements.

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