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
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
A. Rheumatoid arthritis: Rheumatoid arthritis is an autoimmune condition characterized by chronic inflammation of the joints. Some research suggests a possible link between autoimmune disorders such as rheumatoid arthritis and Meniere's disease. Autoimmune conditions can affect the inner ear, leading to vestibular dysfunction and contributing to the development of Meniere's disease.
B. Bacterial pneumonia: Bacterial pneumonia is a respiratory infection caused by bacterial pathogens. There is no direct association between bacterial pneumonia and an increased risk of developing Meniere's disease. Meniere's disease primarily affects the inner ear and is not related to respiratory infections.
C. Macular degeneration: Macular degeneration is a degenerative eye disease that affects the central portion of the retina. There is no known association between macular degeneration and an increased risk of developing Meniere's disease. These conditions affect different parts of the body and are not related in terms of etiology or risk factors.
D. Osteoporosis: Osteoporosis is a condition characterized by loss of bone density, leading to an increased risk of fractures. There is no direct association between osteoporosis and an increased risk of developing Meniere's disease. These conditions affect different systems in the body and are not known to be related.
Correct Answer is C
Explanation
Answer: C
Rationale:
A) "I'm glad that I can work remotely from my computer. Prolonged use of a computer can strain the eyes, potentially interfering with the healing process after a retinal reattachment procedure. Clients are generally advised to limit screen time during recovery.
B) "I can't wait to be able to take a bath. Submerging the face in water, as during a bath, is discouraged postoperatively due to the risk of introducing bacteria into the eye and delaying healing. Clients are advised to stick to showers and avoid getting the affected eye wet.
C) "I get bored only being able to watch television. Watching television is usually permissible following retinal surgery, as it does not strain the eye excessively. This statement aligns with typical postoperative instructions.
D) "I will be relieved once I can drive myself to the store." Driving is contraindicated during the recovery phase due to potential visual disturbances and the need for the eye to heal properly. Clients are typically instructed to avoid driving until cleared by their ophthalmologist.
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