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
When updating protocols for the use of belt restraints, the nurse manager should include the following guideline:
A) Document the client’s condition every 15 min
Frequent documentation of the client's condition and the need for restraint is essential to monitor their well-being and ensure that restraints are used only when necessary. The other options are not recommended:
B) Requesting a PRN restraint prescription for clients who are aggressive is not appropriate because restraints should only be used when there is an immediate risk to the patient or others, and obtaining a PRN prescription for restraints is generally not standard practice.
C) Attaching the restraint to the bed's side rails is not recommended because restraints should be used as a last resort, and there are specific guidelines for restraint application to ensure patient safety.
D) Removing the client's restraint every is not appropriate either. Restraints should only be removed when the client's condition improves, and alternatives to restraint have been explored, or when it's deemed necessary for the patient's safety and well-being following established protocols and guidelines. The option seems incomplete and does not specify the appropriate time frame for removal.
Correct Answer is A
Explanation
Choice A reason
The anterior fontanel is open is the correct answer. An expected finding in an 8-month-old infant is that the anterior fontanel (the soft spot on the top of the baby's head) is open. The fontanelles are spaces between the bones of an infant's skull that allow for the baby's brain to grow and the skull to mould during birth.
The anterior fontanel typically remains open until the baby is around 18 to 24 months old, with the closure process starting sometime after 9 months of age. Therefore, at 8 months of age, it is normal for the anterior fontanel to still be open.
Choice B reason:
Both fontanels are the same size is incorrect. Both fontanels are usually not the same size. The anterior fontanel is larger and diamond-shaped, while the posterior fontanel is smaller and triangular.
Choice C reason:
The posterior fontanel is open is incorrect. The posterior fontanel, located at the back of the baby's head, usually closes earlier than the anterior fontanel. It typically closes within the first few months after birth, so it is not expected to be open at 8 months of age.
Choice D reason
Both fontanels show molding is incorrect. Molding refers to the temporary shaping of the baby's head during birth due to the pressure exerted during the passage through the birth canal. By 8 months of age, the molding typically resolves, and the baby's head should have a more rounded appearance.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today