A nurse providing postoperative teaching to a client who has received a valve replacement discusses the importance of antibiotic prophylaxis prior to any dental or surgical procedure. The nurse understands that antibiotic prophylaxis prevents which of the following in these clients?
Sepsis
Otitis media
Deep vein thrombosis
Bacterial endocarditis
The Correct Answer is D
A. Sepsis is a general systemic infection that can arise from many sources but is not the specific concern addressed by prophylactic antibiotics in valve replacement patients.
B. Otitis media (middle ear infection) is unrelated to dental or surgical procedures and not a concern in valve replacement clients.
C. Deep vein thrombosis (DVT) is prevented with anticoagulants and mobility, not antibiotics.
D. Bacterial endocarditis is a serious infection of the heart's inner lining or valves. Clients with valve replacements are at increased risk, especially during procedures like dental work that may introduce bacteria into the bloodstream. Antibiotic prophylaxis is essential to prevent this potentially life-threatening condition.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. This is the correct sequence of normal electrical conduction through the heart: the impulse originates in the sinoatrial (SA) node, travels to the atrioventricular (AV) node, then to the bundle of His, down the right and left bundle branches, and finally through the Purkinje fibers.
B. This choice places the Purkinje fibers before the bundle branches, which is incorrect.
C. The AV node does not initiate conduction; the SA node is the natural pacemaker of the heart.
D. This sequence incorrectly places the bundle branches before the bundle of His.
Correct Answer is A
Explanation
A. An echocardiogram is the most helpful noninvasive tool for diagnosing cardiomyopathy. It provides detailed information about chamber size, wall motion, ventricular function, and left ventricular hypertrophy, all of which are essential in evaluating cardiomyopathy.
B. Arterial blood gases (ABGs) assess oxygenation and acid-base balance but do not provide structural or functional cardiac details.
C. Swan-Ganz analysis (pulmonary artery catheter) can measure pressures in the heart but is invasive and typically used for hemodynamic monitoring, not initial diagnosis.
D. Cardiac catheterization can show coronary anatomy and pressures, but it is not the first-line test for evaluating cardiomyopathy unless ischemic disease is suspected.
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