Correct Answer: D

Rationale: Surgical repair of patent ductus arteriosus (PDA) aims to prevent increased pulmonary vascular congestion, which can lead to congestive heart failure and respiratory distress. Choice A, pulmonary infection, is not a direct complication of PDA but rather a result of other factors. Choice B, right-to-left shunt of blood, is a characteristic of a different heart condition (e.g., Tetralogy of Fallot) and not specifically associated with PDA. Choice C, decreased workload on the left side of the heart, is not a typical complication of PDA but rather a consequence of left-to-right shunting that can cause volume overload in the pulmonary circulation.

Correct Answer: C

Rationale: The correct answer is C, Chickenpox (varicella). Chickenpox is a viral disease characterized by a highly pruritic rash that typically starts on the abdomen and then spreads to other parts of the body, including the face and proximal extremities. It can lead to complications such as pneumonia and encephalitis. Rubella (German measles) presents with a mild rash and swollen lymph nodes; Rubeola (measles) also presents with a rash but starts on the face before spreading downwards; Scarlet fever is caused by Group A Streptococcus bacteria and is characterized by a rash, fever, and sore throat.

Correct Answer: A

Rationale: Monitoring fluid status is crucial for a child with congenital heart disease because these children are at risk of fluid overload which can worsen their condition. Monitoring fluid intake and output helps prevent complications like congestive heart failure. Encouraging activity (Choice B) should be individualized based on the child's condition and tolerance, as excessive activity can strain the heart. Promoting a high-calorie diet (Choice C) is not typically recommended for children with congenital heart disease unless specifically indicated, as excessive weight gain can worsen their cardiac function. Maintaining oxygen therapy (Choice D) may be necessary in some cases, but monitoring fluid status is a more fundamental aspect of care for children with congenital heart disease.

Correct Answer: A

Rationale: When assessing a 2-year-old child with abdominal pain and adequate perfusion, it is essential to examine the child in the parent's arms. This approach helps reduce anxiety, provide comfort, and establish trust with the child. Palpating the painful area of the abdomen first (Choice B) may cause discomfort and increase anxiety in the child. Placing the child supine and palpating the abdomen (Choice C) without considering the child's comfort and security may lead to resistance and inaccurate assessment. Separating the child from the parent (Choice D) can exacerbate the child's anxiety and hinder the examination process. Therefore, examining the child in the parent's arms is the most appropriate approach in this scenario.

Correct Answer: A

Rationale: A webbed neck is a classic physical characteristic seen in individuals with Turner syndrome, a genetic condition that results from a missing or partially missing X chromosome in females. This distinctive feature occurs due to excess skin on the neck and is a key clinical clue for healthcare providers. Microcephaly (choice B) refers to a small head size and is not typically associated with Turner syndrome. Gynecomastia (choice C) is the enlargement of breast tissue in males and is not a common finding in Turner syndrome. Cognitive delay (choice D) involves intellectual or developmental delays and is not a specific feature of Turner syndrome.