In a 2-month-old infant, a machine-like continuous murmur is audible and heard loudest in the upper left sternal border (ULSB) during late systole. This finding could be suggestive of a:
pulmonary valve stenosis.
venous hum.
patent ductus arteriosus.
ventricular septal defect.
The Correct Answer is C
Rationale:
A. Pulmonary valve stenosis typically produces a systolic ejection murmur, not a continuous machine-like murmur.
B. A venous hum is continuous but usually heard over the right or left supraclavicular area and is benign.
C. Patent ductus arteriosus (PDA) classically produces a continuous, “machine-like” murmur best heard at the upper left sternal border. The murmur persists throughout systole and diastole due to continuous blood flow from the aorta to the pulmonary artery.
D. A ventricular septal defect usually produces a holosystolic murmur heard best at the lower left sternal border, not a continuous machine-like murmur.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Rationale:
A. Inhaled bronchodilators have limited efficacy in mild bronchiolitis and are not routinely recommended for initial treatment.
B. Over-the-counter antihistamines are not effective for bronchiolitis in infants.
C. Cough suppressants are not recommended in infants due to potential side effects and lack of proven benefit.
D. Supportive care is the mainstay of treatment for mild bronchiolitis, including ensuring adequate hydration, monitoring oxygenation, and providing comfort measures. Most cases are self-limited and resolve without pharmacologic intervention.
Correct Answer is B
Explanation
Rationale:
A. A chordee refers to a downward curvature of the penis, often associated with hypospadias, but it is not defined by the location of the urethral opening.
B. Hypospadias is a congenital condition in which the urethral opening is located on the ventral (underside) surface of the penis rather than at the tip of the glans. Early identification is important for surgical planning.
C. Epispadias is characterized by a urethral opening on the dorsal (top) surface of the penis.
D. Cryptorchidism refers to undescended testes and does not affect the urethral meatus.
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