which laboratory test would be the least effective in making the diagnosis of a myocardial infarction which laboratory test would be the least effective in making the diagnosis of a myocardial infarction
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Nclex Practice Questions 2024

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

Correct answer: A: AST

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. An elderly client denies that abuse is occurring. Which of the following factors could be a barrier for the client to admit being a victim?

Correct answer: fear of reprisal or further violence if the incident is reported

Rationale: One of the significant barriers for elderly clients to admit being victims of abuse is the fear of reprisal or further violence if the incident is reported. Elderly individuals may be afraid of the consequences of reporting abuse, such as retaliation or increased violence from the abuser. This fear can prevent them from disclosing their victimization. Choices A and C are incorrect as knowledge of the rarity of elder abuse and the availability of appropriate screening tools do not directly impact the client's willingness to admit abuse. Choice B, personal belief that abuse is deserved, may be a factor for some individuals but is not as common or impactful as the fear of reprisal or further violence.

3. When the nurse is determining the appropriate size of an oropharyngeal airway to insert, what part of a client’s body should she measure?

Correct answer: corner of the mouth to the tragus of the ear

Rationale: Correct! When sizing an oropharyngeal airway, the nurse should measure from the corner of the client’s mouth to the tragus of the ear. This measurement ensures that the airway is the appropriate length to reach the pharynx without being too long or too short. Choices B, C, and D are incorrect as they do not provide the correct anatomical landmarks for determining the size of an oropharyngeal airway. Measuring from the corner of the mouth to the tragus of the ear is a standard method to ensure proper airway size and prevent complications during airway management.

4. A laboring client is experiencing late decelerations. Which position should she be placed in?

Correct answer: left lateral

Rationale: The correct answer is the left lateral position. Placing the laboring client in the left lateral position is beneficial because it promotes blood flow to the placenta. Late decelerations indicate potential issues with fetal oxygenation, and changing the position to left lateral can help improve placental perfusion. Choices B, C, and D are incorrect because lithotomy, semi-Fowler’s, and right lateral positions do not specifically address the need for improved blood flow to the placenta in cases of late decelerations.

5. A patient has been diagnosed with diabetes mellitus. Which of the following is not a clinical sign of diabetes mellitus?

Correct answer: Lower extremity edema

Rationale: Polyphagia, polyuria, and metabolic acidosis are common clinical signs of diabetes mellitus. Polyphagia refers to excessive hunger, polyuria is excessive urination, and metabolic acidosis can occur due to poorly controlled diabetes. Lower extremity edema, on the other hand, is not a typical clinical sign of diabetes mellitus. Edema in the lower extremities is more commonly associated with conditions like heart failure or kidney disease rather than diabetes mellitus.

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