Nursing Elites

1. Which pediatric condition is characterized by a "string sign" on an upper GI series?

• A. Intussusception
• B. Hypertrophic pyloric stenosis
• C. Hirschsprung disease
• D. Meckel diverticulum

Correct answer: B

Rationale: The correct answer is B: Hypertrophic pyloric stenosis. The "string sign" is associated with hypertrophic pyloric stenosis, a condition where the pyloric canal is narrowed, leading to gastric outlet obstruction. Intussusception (choice A) typically presents with colicky abdominal pain and currant jelly stools. Hirschsprung disease (choice C) is characterized by the absence of ganglion cells in the distal colon. Meckel diverticulum (choice D) is a congenital outpouching of the small intestine that can present with painless rectal bleeding.

2. What pathologic process is believed to be responsible for the development of postinfectious glomerulonephritis?

• A. Infarction of renal vessels
• B. Immune complex formation and glomerular deposition
• C. Bacterial endotoxin deposition on and destruction of glomeruli
• D. Embolization of glomeruli by bacteria and fibrin from endocardial vegetation

Correct answer: B

Rationale: Postinfectious glomerulonephritis is typically caused by immune complex deposition in the glomeruli following a streptococcal infection. This immune response leads to inflammation and impaired kidney function.

3. The parents of a 4-month-old infant tell the nurse that they are getting a microwave oven and will be able to heat the baby’s formula faster. What should the nurse recommend?

• A. Heat only 8 oz or more.
• B. Do not heat a plastic bottle in a microwave oven.
• C. Leave the bottle top uncovered to allow heat to escape.
• D. Shake the bottle vigorously for at least 30 seconds after heating.

Correct answer: B

Rationale: Heating formula in a plastic bottle in the microwave can cause uneven heating and release harmful chemicals from the plastic.

4. During the 2-month well-child checkup, the nurse expects the infant to respond to sound in which manner?

• A. Respond to name
• B. React to loud noise with Moro reflex
• C. Turn his or her head to side when sound is at ear level
• D. Locate sound by turning his or her head in a curving arc

Correct answer: B

Rationale: At 2 months, infants typically react to loud noises with the Moro reflex, a startle response that is normal at this stage of development.

5. The nurse is caring for an infant who was born 24 hr ago to a mother who received no prenatal care. The infant is a poor feeder but sucks avidly on his hands. Clinical manifestations also include hyperactive reflexes, tremors, sneezing, and a high-pitched shrill cry. What does the nurse consider as a possible diagnosis for this infant?

• A. Seizure disorder
• B. Narcotic withdrawal
• C. Placental insufficiency
• D. Meconium aspiration syndrome

Correct answer: B

Rationale: In this case, the infant's symptoms are consistent with narcotic withdrawal. Infants exposed to drugs in utero may display withdrawal symptoms starting around 12 to 24 hours post-birth. The presentation often includes hyperactive reflexes, tremors, sneezing, high-pitched shrill cry, poor feeding, and sucking avidly on hands. Signs such as loose stools, tachycardia, fever, projectile vomiting, sneezing, and generalized sweating are common. These symptoms are not indicative of a seizure disorder. Placental insufficiency typically leads to a small-for-gestational-age child, which is not mentioned in the scenario. Meconium aspiration syndrome primarily presents with respiratory distress, not the symptoms described in this case.

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