which laboratory test would be the least effective in making the diagnosis of a myocardial infarction
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Nursing Elites

NCLEX-PN

Nclex Practice Questions 2024

1. 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.

2. The women's health charge nurse is making assignments for the next shift. The unit is short one staff member and will receive a nurse from the medical-surgical unit. Which group of clients should she assign to the medical-surgical nurse?

Correct answer: A

Rationale: The correct answer includes clients who have undergone surgical procedures typically managed on a medical-surgical unit. Choice A consists of clients who have had elective surgical procedures such as hysterectomy, bladder suspension with A&P repair, and breast reduction, which are commonly treated in a medical-surgical setting. Choices B, C, and D involve clients with various complications related to childbirth, fetal demise, pneumonia, gestational lymphoma, HELLP syndrome, and bed rest, which are more complex cases requiring specialized care beyond medical-surgical nursing.

3. A client with cancer is admitted to the oncology unit. Stat lab values reveal Hgb 12.6, WBC 6500, K+ 1.9, uric acid 7.0, Na+ 136, and platelets 178,000. The nurse evaluates that the client is experiencing which of the following?

Correct answer: B

Rationale: The correct answer is 'Hypokalemia.' The potassium level of 1.9 indicates low potassium levels, a condition known as hypokalemia. The other lab values are within normal ranges: Hgb 12.6, WBC 6500, uric acid 7.0, Na+ 136, and platelets 178,000. Hypernatremia (choice A) refers to high sodium levels, which are not present in this case. Myelosuppression (choice C) is a decrease in bone marrow activity, which is not indicated by the lab values provided. Leukocytosis (choice D) is an increase in white blood cells, which is also not present based on the given values.

4. The nurse is caring for a client who is dying. While assessing the client for signs of impending death, the nurse observes the client for:

Correct answer: B

Rationale: Cheyne-Stokes respirations are a pattern of breathing characterized by rhythmic waxing and waning of respirations from very deep to very shallow breathing with periods of temporary apnea. This pattern is often associated with conditions like cardiac failure and can be a sign of impending death. Elevated blood pressure and pulse rate are not typically associated with the dying process. Decreased temperature is also not a common sign of impending death. Therefore, option B, Cheyne-Stokes respiration, is the correct choice when assessing a client for signs of impending death.

5. When supporting a family who has just experienced a sudden and unexpected death, the nurse needs to know:

Correct answer: A

Rationale: The correct answer is that survivors have greater emotional turmoil and shock than when death is expected. Sudden death produces more emotional turmoil and shock in survivors compared to gradual, expected death. Survivors of sudden death do not have the opportunity to engage in anticipatory grief. The unexpectedness of sudden death is the most disturbing and unbalancing factor, leading to heightened emotional turmoil and shock. Choice B is incorrect as survivors of sudden death experience more emotional turmoil and shock. Choice C is incorrect because sudden death brings about a different level of emotional turmoil and shock. Choice D is incorrect as survivors of sudden and unexpected death still go through significant emotional distress.

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