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 B
Explanation
The correct answer is B.
Choice A reason: Completing oral hygiene is important for overall health, especially for individuals with cystic fibrosis, as they are at a higher risk for dental problems due to thick mucus that can harbor bacteria. However, oral hygiene does not have a direct impact on the effectiveness of postural drainage. Postural drainage is a technique used to clear mucus from the lungs, and while maintaining oral hygiene is beneficial, it is not a prerequisite for this procedure.
Choice B reason: Using a bronchodilator, such as an ibuterol inhaler, is recommended before postural drainage because it helps to open the airways, making the procedure more effective. Bronchodilators work by relaxing the muscles around the airways, which can become constricted in conditions like cystic fibrosis. This relaxation allows for easier clearance of mucus during postural drainage.
Choice C reason: Pancrelipase is an enzyme supplement used to aid digestion in patients with cystic fibrosis, who often have pancreatic insufficiency. While taking pancrelipase is crucial for nutrient absorption, it is not specifically related to the respiratory treatment of postural drainage. Therefore, it is not necessary to take pancrelipase immediately before this procedure.
Choice D reason: Eating a meal before postural drainage is not recommended. The procedure involves placing the body in positions that facilitate the drainage of mucus from the lungs due to gravity. Having a full stomach can cause discomfort, increase the risk of vomiting, and may hinder the effectiveness of the drainage. It is best to perform postural drainage when the stomach is empty, either before meals or at least 1.5 hours after eating.
Correct Answer is D
Explanation
Choice A reason
Abdomen area is not appropriate: Assessing skin turgor on the abdomen is not commonly performed. The abdomen may not be the most accurate site for assessing skin turgor, especially in older adults, as it can be influenced by factors such as body fat distribution.
Choice B reason:
Shoulder are is not appropriate: The shoulder is not a typical site for assessing skin turgor. It is generally not used for this purpose, as it may not provide reliable results
Choice C reason:
Stomach is not the correct answer.: Assessing skin turgor on the stomach is also not commonly performed. The abdomen or stomach may not be the most accurate site for assessing skin turgor, especially in older adults.
Choice D reason
When assessing skin turgor in an older adult client, the nurse should lift the skin on the neck to evaluate its elasticity and hydration status. Skin turgor is a measure of skin's elasticity and is commonly used as an indicator of hydration in both adults and older adults.
To assess skin turgor, the nurse will gently pinch a small amount of skin on the back of the client's hand or the front of the chest (sternum). However, since the options listed do not include these areas, the closest alternative for an older adult would be the neck.
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