The nurse is caring for a client admitted with unstable angina. The laboratory result for the initial troponin I is elevated in this client. The nurse should recognize what implication of this assessment finding?
This result indicates muscle injury but does not specify the source.
Because the client has a history of unstable angina, this is a poor indicator of myocardial injury.
This is only an accurate indicator of myocardial damage when it reaches its peak in 24 hours.
This is an accurate indicator of myocardial injury.
The Correct Answer is D
A. This result indicates muscle injury but does not specify the source.
This statement is partly correct. An elevated troponin I level does indicate muscle injury, specifically damage to the heart muscle. However, troponin I is highly specific to cardiac muscle, so an elevated level would indeed specify the source as cardiac or myocardial injury.
B. Because the client has a history of unstable angina, this is a poor indicator of myocardial injury.
This statement is incorrect. A history of unstable angina does not diminish the significance of an elevated troponin I level. In fact, unstable angina is itself a serious condition that can lead to myocardial injury or heart attack, and an elevated troponin I level in this context indicates ongoing or recent myocardial damage.
C. This is only an accurate indicator of myocardial damage when it reaches its peak in 24 hours.
This statement is not entirely accurate. While it is true that troponin I levels may continue to rise and peak within 12-24 hours after the onset of myocardial injury, an elevated troponin I level at any point is still a significant indicator of myocardial damage. It's essential to recognize elevated troponin I levels promptly to initiate appropriate interventions and monitor the client's cardiac status closely.
D. This is an accurate indicator of myocardial injury.
This statement is correct. An elevated troponin I level is a highly sensitive and specific marker of myocardial injury. It indicates damage to the heart muscle, which can occur due to conditions like unstable angina, heart attack (myocardial infarction), myocarditis, or other cardiac issues. Therefore, recognizing an elevated troponin I level in a client with unstable angina is crucial for proper management and further evaluation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. The symptoms indicate an acute coronary episode and should be treated as such:
The client's symptoms, including sudden midsternal chest pain unrelieved with rest and a history of coronary artery disease (CAD), strongly suggest an acute coronary event, such as a myocardial infarction (heart attack). Pale, cool skin can also be indicative of decreased perfusion due to cardiac compromise. Given these critical signs and symptoms, the nurse should interpret this as a potential cardiac emergency and initiate immediate interventions aimed at managing and stabilizing the client's condition.
B. The symptoms indicate angina and should be treated as such:
While angina can present with symptoms such as chest pain, it is typically relieved with rest or nitroglycerin. In contrast, the client in this scenario has midsternal chest pain that is not relieved with rest, which is more indicative of an acute coronary event like a myocardial infarction. Therefore, interpreting the symptoms as angina and treating them as such may not be appropriate given the severity and persistence of the chest pain.
C. Treatment should be determined pending the results of an exercise stress test:
Waiting for the results of an exercise stress test is not appropriate in this scenario, as the client's presentation suggests an acute cardiac event that requires immediate intervention. Exercise stress tests are typically used for diagnostic purposes to assess cardiovascular function under controlled conditions but are not suitable for managing acute coronary episodes or emergencies.
D. The symptoms indicate a pulmonary etiology rather than a cardiac etiology:
While some symptoms, such as shortness of breath or chest pain, can overlap between cardiac and pulmonary conditions, the client's presentation with sudden midsternal chest pain unrelieved with rest, pale cool skin, and a history of CAD strongly suggests a cardiac etiology, specifically an acute coronary event. It is essential to prioritize cardiac assessment and intervention based on the client's symptoms and medical history.
Correct Answer is B
Explanation
A. When the client states he is ready to start the infusion:
While it's important to consider the client's readiness and cooperation, the timing of the infusion should not solely depend on the client's statement. The priority is to start the infusion promptly after receiving the packed red blood cells (PRBCs) from the blood bank to ensure their safety and effectiveness.
B. As soon as the nurse can prepare the client and the administration set:
This choice is the correct answer. After receiving the unit of PRBCs from the blood bank at 1130, the nurse should begin the infusion as soon as possible after preparing the client (ensuring the correct patient, verifying the blood type compatibility, obtaining informed consent, etc.) and the administration set (priming the IV tubing, checking for any leaks, etc.). Prompt administration helps prevent delays that could compromise the quality of the blood product.
C. 2 hours after obtaining blood from the blood bank:
Waiting for 2 hours before starting the infusion is too long and could exceed the recommended timeframe for administering PRBCs after obtaining them from the blood bank. Delaying the infusion for such an extended period could impact the viability and safety of the blood product.
D. When the client has finished eating lunch:
The timing of the client's meal is not a factor in determining when to start the infusion of PRBCs. While it's generally important for the client to have adequate nutrition and hydration, the priority is to administer the blood product promptly after preparation to ensure its efficacy and safety, rather than waiting for unrelated factors such as meal times.
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