Which area would the nurse assess for a murmur due to aortic valve stenosis?
Right 5th intercostal space at the sternal border
Right 2nd intercostal space at the sternal border
Left 5th intercostal space at the mid-clavicular line
Left 2nd intercostal space at the mid-clavicular line
The Correct Answer is B
Choice A reason: The right 5th intercostal space at the sternal border is near the tricuspid valve, where murmurs from tricuspid regurgitation or stenosis are typically heard. Aortic valve stenosis murmurs, caused by turbulent flow through a narrowed aortic valve, are not prominent here, making this an incorrect assessment site.
Choice B reason: The right 2nd intercostal space at the sternal border is the aortic area, ideal for auscultating aortic valve stenosis murmurs. These murmurs are harsh, crescendo-decrescendo, and systolic, radiating to the carotid arteries due to turbulent blood flow through the stenosed aortic valve, making this the correct site.
Choice C reason: The left 5th intercostal space at the mid-clavicular line is the mitral valve area, where mitral regurgitation or stenosis murmurs are heard. Aortic valve stenosis murmurs originate from the aortic root and are not best detected here, rendering this choice incorrect.
Choice D reason: The left 2nd intercostal space at the mid-clavicular line is near the pulmonic valve, where pulmonic stenosis murmurs are auscultated. Aortic valve stenosis murmurs are not prominent in this area, as they are specific to the aortic region, making this an incorrect choice.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Measuring respirations during pulse assessment can lead to inaccurate counts, as patients may alter their breathing when aware of pulse measurement. Conscious awareness often causes irregular or controlled breathing, which does not reflect the true respiratory rate, making this an unreliable time.
Choice B reason: Auscultation involves listening to lung or heart sounds, which requires patient cooperation and often affects breathing patterns. Patients may consciously modify their respirations during this process, leading to inaccurate respiratory rate measurements, rendering this an unsuitable time for assessment.
Choice C reason: Interviewing involves patient interaction, which can influence breathing due to speech or emotional responses. This conscious activity often results in irregular or controlled breathing patterns, making it an unreliable time to accurately measure the patient’s natural respiratory rate.
Choice D reason: Measuring respirations when the patient is sleeping ensures an undisturbed, natural breathing pattern, as the patient is unaware of the assessment. This allows the nurse to count the respiratory rate accurately, reflecting the true resting state, making it the optimal time.
Correct Answer is A
Explanation
Choice A reason: The dose is 25 mg/kg × 10 kg = 250 mg. With 500 mg tablets, 250 mg requires 250 ÷ 500 = 0.5 tablet. This precise calculation ensures the correct dose, minimizing the risk of under- or overdosing, making this the correct choice.
Choice B reason: A 0.75 tablet dose equals 375 mg (0.75 × 500 mg), exceeding the ordered 250 mg. This could lead to toxicity, as Amoxicillin overdosing may cause gastrointestinal or renal issues, making this an incorrect and potentially harmful choice.
Choice C reason: A 1.25 tablet dose equals 625 mg (1.25 × 500 mg), significantly more than the ordered 250 mg. This excessive dose risks severe side effects, including allergic reactions or organ stress, making this an unsafe and incorrect choice.
Choice D reason: A 0.25 tablet dose equals 125 mg (0.25 × 500 mg), less than the ordered 250 mg. This underdose could lead to ineffective treatment, increasing the risk of bacterial resistance, making this an incorrect choice for the prescribed dose.
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