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

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Question 1 of 9

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

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.

Question 2 of 9

A nurse is teaching the mother of an 11-month-old infant how to clean the infant's teeth. The nurse tells the mother to take which action?

Correct Answer: C

Rationale: The correct action when cleaning an infant's teeth is to use water and a cotton swab to gently rub the teeth. This method helps in removing any food particles or plaque buildup without the risks associated with toothpaste ingestion. Using a small amount of toothpaste and a soft-bristle toothbrush is not recommended for infants as they may swallow the toothpaste, leading to potential fluoride ingestion issues. Using diluted fluoride and rubbing the teeth with a soft washcloth is unnecessary at this age since infants typically receive fluoride through other sources like formula. Dipping the infant's pacifier in maple syrup is highly inappropriate and poses a significant risk of tooth decay due to the high sugar content, which can harm the infant's teeth.

Question 3 of 9

The nurse is caring for a client with epilepsy who is being treated with carbamazepine (Tegretol). Which laboratory value might indicate a serious side effect of this drug?

Correct Answer: C

Rationale: Carbamazepine (Tegretol) can suppress the bone marrow, leading to a decrease in the white blood cell count. A laboratory value of WBC 2,000 per cubic millimeter indicates a serious side effect of the drug. Choices A and D are within normal limits, while choice B is at the lower limit of normal. Therefore, choices A, B, and D are incorrect.

Question 4 of 9

The client is admitted with chronic obstructive pulmonary disease. Blood gases reveal pH 7.36, CO2 45, O2 84, HCO3 28. The nurse would assess the client to be in:

Correct Answer: C

Rationale: The client is experiencing compensated respiratory acidosis. The pH is within the normal range but is lower than 7.40, indicating acidity. The elevated CO2 level and low O2 level suggest respiratory involvement. The slightly elevated HCO3 level indicates a compensatory mechanism. In respiratory acidosis, the pH will be inversely related to the CO2 and bicarb levels, with elevated CO2 and HCO3 levels contributing to acidosis. Choices A, B, and D are incorrect because they do not align with the presented blood gas values and the compensatory response observed in this case.

Question 5 of 9

A client asks the nurse if all donor blood products are cross-matched with the recipient to prevent a transfusion reaction. Which of the following always requires cross-matching?

Correct Answer: A

Rationale: Corrected Rationale: Packed red blood cells contain antigens and antibodies that must be matched between the donor and recipient to prevent transfusion reactions. Platelets, plasma, and granulocytes do not contain red blood cells, so they do not require cross-matching. Platelets are matched based on ABO compatibility, while plasma and granulocytes are not routinely cross-matched as they lack red cell antigens.

Question 6 of 9

The nurse is participating in discharge teaching for the postpartal client. The nurse is aware that an effective means of managing discomfort associated with an episiotomy after discharge is:

Correct Answer: C

Rationale: A sitz bath is an effective method for managing discomfort associated with an episiotomy after discharge. It helps reduce swelling and promotes healing in the perineal area. Ice packs (option D) are typically used immediately after delivery to provide pain relief. Promethazine (option A) and aspirin (option B) are not indicated for managing discomfort associated with an episiotomy. Promethazine is an antihistamine, and aspirin is a nonsteroidal anti-inflammatory drug, both of which are not commonly used for this purpose.

Question 7 of 9

A nurse provides information about feeding to the mother of a 6-month-old infant. Which statement by the mother indicates an understanding of the information?

Correct Answer: B

Rationale: The correct answer is B: 'Egg white should not be given to my infant because of the risk for an allergy.' Egg white, even in small quantities, is not recommended for infants until the end of the first year of life due to its common allergenic potential. Choice A is incorrect because while meats are important for iron, they are not typically introduced to infants until around 6-8 months. Choice C is incorrect because food should never be mixed with formula in the bottle as it may lead to feeding difficulties and inaccurate monitoring of intake. Choice D is incorrect because fluoride supplementation may be required around 6 months depending on the infant's fluoride intake from water. Introducing solid foods like rice cereal, fruits, or vegetables is usually done around 5-6 months, following healthcare provider recommendations.

Question 8 of 9

The client with cirrhosis of the liver is receiving Lactulose. The nurse is aware that the rationale for the order for Lactulose is:

Correct Answer: C

Rationale: Lactulose is administered to the client with cirrhosis to lower ammonia levels, as it works by acidifying the colon, trapping ammonia for elimination in the stool. Choices A, B, and D are incorrect because Lactulose does not have an effect on blood glucose, uric acid, or creatinine levels. Therefore, the correct answer is to lower the ammonia level.

Question 9 of 9

A client with glomerulonephritis is placed on a low-sodium diet. Which of the following snacks is suitable for the client with sodium restriction?

Correct Answer: D

Rationale: The correct answer is a fresh peach. It is the most suitable snack for a client with sodium restriction as it is naturally low in sodium. Peanut butter cookies (choice A), grilled cheese sandwich (choice B), and cottage cheese and fruit (choice C) contain higher amounts of sodium, making them unsuitable choices for someone on a low-sodium diet. Fresh fruits like peaches are excellent options for individuals on a low-sodium diet as they are not only low in sodium but also provide essential nutrients and hydration.

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