A nurse is providing care for a client who experienced a myocardial infarction prior to a cardiac arrest. Which of the following laboratory tests will identify early injury to the cardiac muscle?
Creatine kinase (CK) test
Creatine kinase-myocardial band (CK-MB) test
Brain natriuretic peptide (BNP) test
Troponin T test
The Correct Answer is D
Answer: D. Troponin T test
Rationale:
A. Creatine kinase (CK) test: While creatine kinase isoenzymes, including CK-MB, can be elevated following myocardial infarction (MI), they are not specific to cardiac muscle injury. CK is found in various tissues throughout the body, so elevated levels can also indicate damage to skeletal muscle or brain tissue, among other sources.
B. Creatine kinase-myocardial band (CK-MB) test: CK-MB is a cardiac-specific isoform of creatine kinase, and elevated levels can indicate myocardial injury, particularly in the context of an acute MI. However, troponin T is a more sensitive and specific marker for myocardial injury.
C. Brain natriuretic peptide (BNP) test: Brain natriuretic peptide is primarily used in the diagnosis and management of heart failure. While elevated BNP levels can indicate heart muscle strain or stress, they are not specific markers for acute myocardial infarction or early injury to the cardiac muscle.
D. Troponin T test: This is the correct answer. Troponin T is a highly specific marker for cardiac muscle injury. Elevated troponin levels can be detected within hours of myocardial infarction and persist for several days, making it an essential tool in the diagnosis of acute coronary syndromes, including myocardial infarction. Troponin T is considered one of the gold standard biomarkers for detecting early injury to the cardiac muscle.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Answer and explanation.
The correct answer is choice A. A nontender, protruding abdomen is a normal finding for a 2year-old toddler. This is due to the immature development of the abdominal muscles and the relatively large size of the liver and kidneys in relation to the rest of the body.
Choice B is wrong because the head circumference should be equal to or less than the chest circumference by age 2. A head circumference that exceeds the chest circumference could indicate hydrocephalus or other neurological problems.
Choice C is wrong because the fontanels, or soft spots on the skull, should be closed by age 18 months. Palpable fontanels could indicate dehydration, malnutrition, or congenital disorders.
Choice D is wrong because the natural loss of deciduous teeth, or baby teeth, usually begins around age 6. Premature loss of teeth could indicate dental caries, trauma, or endocrine disorders.
Correct Answer is A
Explanation
The correct answer is choice A: “We can review some information to help you select a safe alternative practitioner.” This statement shows respect for the client’s interest in alternative therapies and offers guidance on how to choose a reliable and qualified provider. Alternative therapies can provide some benefits for people with rheumatoid arthritis, such as reducing pain, inflammation, and stiffness, but they should be used as a complement to conventional treatments and not as a substitute.
Choice B is wrong because it implies that the client has no role in deciding their own treatment plan and that alternative therapies are not worth considering.
This may discourage the client from sharing their preferences and concerns with the provider.
Choice C is wrong because it suggests that online support groups are a reliable source of information about alternative remedies, which may not be true.
Online sources may contain inaccurate, misleading, or harmful information that could jeopardize the client’s health and safety.
Choice D is wrong because it encourages the client to try any therapy that fits their personal belief system, without considering the evidence, effectiveness, or potential risks of such therapies. Some alternative therapies may interact with medications, cause side effects, or worsen the condition.
Normal ranges for rheumatoid arthritis are not applicable in this question, as it is not asking about laboratory values or disease activity measures. However, some common tests used to diagnose and monitor rheumatoid arthritis include erythrocyte sedimentation rate (ESR), Creactive protein (CRP), rheumatoid factor (RF), anti-cyclic citrullinated peptide (anti-CCP) antibodies, and joint ultrasound or X-ray.
The normal ranges for these tests may vary depending on the laboratory and the method used.
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