A B-type natriuretic peptide (BNP) sample has been drawn from an older adult patient who has been experiencing vital fatigue and shortness of breath.
What diagnosis will this test allow the care team to investigate?
Heart failure
Pleurisy
Cardiomyopathy
Valve dysfunction
The Correct Answer is A
Choice A rationale:
B-type natriuretic peptide (BNP) is a hormone produced primarily by the ventricles of the heart in response to stretching of the heart muscle fibers. It plays a crucial role in regulating blood volume and pressure by promoting the excretion of sodium and water by the kidneys. Elevated levels of BNP in the blood are strongly suggestive of heart failure, as the heart muscle is working harder to pump blood, leading to increased BNP production.
Key points supporting A as the correct answer:
BNP is a highly sensitive and specific marker for heart failure. Studies have demonstrated its accuracy in diagnosing heart failure, even in early stages when symptoms may be subtle.
The patient's clinical presentation aligns with heart failure. Vital fatigue and shortness of breath are both classic symptoms of heart failure, resulting from the heart's inability to meet the body's demands for oxygenated blood.
Other choices are less likely based on the information provided. Pleurisy (inflammation of the lining of the lungs), cardiomyopathy (disease of the heart muscle), and valve dysfunction can all cause shortness of breath, but they would not typically lead to elevated BNP levels unless heart failure is also present.
Additional considerations:
BNP levels can be influenced by factors other than heart failure, such as age, kidney function, and certain medications. However, in the context of a patient with typical heart failure symptoms, an elevated BNP level strongly supports the diagnosis.
BNP testing is often used to guide treatment decisions in patients with heart failure. Serial BNP measurements can help assess the effectiveness of therapy and monitor for disease progression.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Assessing lung sounds is important for evaluating respiratory status, but it is not the priority assessment before administering digoxin. Digoxin does not have a direct effect on the respiratory system, and changes in lung sounds would not necessarily indicate a contraindication to its administration.
However, in patients with heart failure, which is a common indication for digoxin, auscultating lung sounds can provide valuable information about fluid status and the effectiveness of treatment. Therefore, while not the priority assessment, lung auscultation remains a relevant part of the overall assessment of a patient receiving digoxin.
Choice B rationale:
Assessing systolic blood pressure is important for monitoring hemodynamic status, but it is not the most critical assessment before administering digoxin. Digoxin does not directly affect blood pressure, and changes in blood pressure would not necessarily indicate a contraindication to its administration.
However, in patients with hypertension, which can be a factor in heart failure, monitoring blood pressure is essential for managing overall cardiovascular health. Therefore, while not the priority assessment, blood pressure measurement remains an important aspect of care for patients receiving digoxin.
Choice C rationale:
Assessing the brachial pulse for 30 seconds can provide a general assessment of heart rate and rhythm, but it is not as accurate as assessing the apical pulse for a full minute.
The apical pulse is the most reliable way to assess heart rate and rhythm, especially in patients with irregular heartbeats or those taking medications that can affect heart rate, such as digoxin.
Therefore, assessing the apical pulse for a full minute is essential to ensure accurate assessment of the patient's cardiac status before administering digoxin.
Choice D rationale:
Assessing the apical pulse for 60 seconds is the priority assessment before administering digoxin. This is because digoxin is a cardiac glycoside that affects the heart's electrical conduction system and can slow the heart rate. It is essential to assess the patient's heart rate and rhythm before administering digoxin to ensure that it is safe to do so.
A slow heart rate (bradycardia), irregular heart rhythms (such as atrial fibrillation), or certain heart block conditions can be contraindications to digoxin administration or require dosage adjustments.
By accurately assessing the apical pulse for a full minute, the nurse can identify any potential contraindications or concerns and ensure the safe administration of digoxin.
Correct Answer is C
Explanation
Choice A rationale:
Drowsiness and blurred vision are not common adverse effects of nitroglycerin.
While some individuals may experience mild drowsiness, it's not a primary concern.
Blurred vision is not typically associated with nitroglycerin use.
Choice B rationale:
Nervousness and paresthesia (tingling or numbness in the extremities) are not common adverse effects of nitroglycerin.
Some individuals may experience transient anxiety or nervousness, but it's not a characteristic side effect.
Paresthesia is more commonly associated with other medications or conditions.
Choice C rationale:
Throbbing headache and dizziness are the most common adverse effects of nitroglycerin.
They occur due to nitroglycerin's vasodilatory effect, which causes blood vessels to relax and widen.
This can lead to a temporary drop in blood pressure, resulting in headaches and dizziness.
The headaches are often described as throbbing or pulsating, and they typically occur in the frontal or temporal regions of the head.
Dizziness may be mild or severe, and it may be accompanied by lightheadedness or a feeling of unsteadiness.
Choice D rationale:
Tinnitus (ringing in the ears) and diplopia (double vision) are not common adverse effects of nitroglycerin.
They may occur in rare cases, but they are not typically associated with its use.
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