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 B
Explanation
A. Sick sinus syndrome – This involves an abnormal SA node function, often with varying rhythm disturbances (e.g., sinus pauses, bradycardia-tachycardia). The strip described is regular and does not reflect these changes.
B. Normal sinus rhythm – The rhythm is regular, the PR interval is within normal limits (0.12–0.20 seconds), the heart rate is 60 beats/min (within the normal range of 60–100), and P waves precede each QRS complex consistently.
C. Sinus bradycardia – Although the rate is 60, which is at the low end of normal, it is not below 60. Bradycardia is defined as <60 bpm.
D. First-degree heart block – First-degree AV block is characterized by a prolonged PR interval >0.20 seconds. The PR interval here is 0.16 seconds, which is normal.
Correct Answer is B
Explanation
A. Blood flowing back from the left atrium to the left ventricle describes mitral regurgitation, not aortic regurgitation.
B. Aortic regurgitation involves the backflow of blood from the aorta into the left ventricle during diastole due to an incompetent aortic valve. This leads to volume overload in the left ventricle.
C. Obstruction of blood from the left atrium to the left ventricle occurs in mitral stenosis, not aortic regurgitation.
D. Obstruction of blood flow from the left ventricle is characteristic of aortic stenosis, not aortic regurgitation.
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